WO2019150597A1

WO2019150597A1 - Electric power converting device

Info

Publication number: WO2019150597A1
Application number: PCT/JP2018/025261
Authority: WO
Inventors: 大斗水谷; 岩蕗　寛康; 友一坂下; 優介檜垣; 貴昭 ▲高▼原; 卓哉藪本
Original assignee: 三菱電機株式会社
Priority date: 2018-02-02
Filing date: 2018-07-03
Publication date: 2019-08-08

Abstract

This electric power converting device is provided with a first electric power converting circuit which converts an alternating current voltage input from an alternating-current power source into a direct current voltage and outputs the same from another end, a second electric power converting circuit which controls a direct current voltage or a direct current supplied to a load, a third electric power converting circuit which receives electric power in a non-contact manner and converts the received alternating current voltage into a direct current voltage, an integrating direct current capacitor having one end connected to a positive electrode side of an integrating direct current bus bar and another end connected to a negative electrode side of the integrating direct current bus bar, and a control circuit which controls the first to third electric power converting circuits, wherein said other end of the first electric power converting circuit and the other end of the second electric power converting circuit are connected to the integrating direct current bus bar, and the third electric power converting circuit is connected to the integrating direct current bus bar, thereby achieving the objective of providing an electric power converting device with which it is possible for power to be supplied using either one or both of a contact power supply method and a non-contact power supply method.

Description

Power converter

The present invention relates to a power conversion device having a power supply function by a wired method (contact power supply method) and a power supply function by a wireless method (contactless power supply method).

In recent years, a power conversion device using wireless power feeding has been developed because of its usefulness, and application to a charger used in, for example, an electric vehicle is being studied. In addition, a power conversion device having both a power supply function using wired and a power supply function using wireless has been studied (see, for example, Patent Document 1). In a conventional power conversion device that integrates these two functions, an AC supply source, a main EMI (Electro-Magnetic Interference) filter and a rectifier, and a PFC (Power-Factor-Correction) circuit are connected to the vehicle-side wired path. The vehicle side wireless path consisting of vehicle pad, vehicle tuning, vehicle pad decoupling rectifier, and output filter is coupled with in-vehicle bulk capacitance and charges the battery via an isolated DC-DC converter It was the composition to do.

Special table 2016-524890

In the configuration of the conventional device described in Patent Document 1 described above, when the AC supply source voltage is high, the in-vehicle bulk capacitance voltage needs to be increased by a PFC or an insulating DC-DC converter on the contact power feeding method side. . For this reason, when the AC supply source voltage is high and the power reception voltage on the non-contact power supply method side is low, there is a problem that the power supply function on the contact power supply method side must be stopped.

The present invention has been made in order to solve the above-described problems. In a power converter having a power supply function using a wired (contact power supply method) and a power supply function using a wireless (non-contact power supply method), It is an object of the present invention to obtain a power conversion device that can supply power simultaneously without stopping any power supply function even when the power reception voltage on the contact power feeding method side is low.

A power converter according to the present invention has a first converter circuit, one end of which is connected to an AC power supply and converts an input voltage from the AC power supply to a DC voltage, and the DC voltage converted by the first converter circuit is converted to an AC voltage. Inverter circuit to convert, first converter circuit and DC link capacitor connected to inverter circuit, insulation transformer that insulates voltage input from inverter circuit and supplies power to secondary side, AC voltage input from insulation transformer A first power conversion circuit having a second converter circuit that converts to a DC voltage and outputs from the other end; and a second power conversion that is connected to a load at one end and controls a DC voltage or a DC current supplied to the load Magnetically coupled to a circuit and a non-contact power transmission / reception circuit, the power is received by a power transmission / reception coil that transmits and receives power in a non-contact manner. A third power converter circuit having a third converter circuit for converting an AC voltage into a DC voltage, and one for integration, one end connected to the positive side of the DC bus for integration and the other side connected to the negative side of the DC bus for integration A DC capacitor and a control circuit for controlling the first to third power conversion circuits, wherein the other end of the first power conversion circuit and the other end of the second power conversion circuit are connected to the DC bus for integration. And a third power conversion circuit is connected to the integration DC bus.

According to the present invention, since the output unit on the contact power supply method side and the output unit on the contactless power supply method side are connected to the main circuit via the capacitor, the received voltage on the contactless power supply method side is low. However, it is possible to simultaneously supply power without stopping any of the power supply functions.

It is a block diagram of the power converter device shown in Embodiment 1 of this invention. It is an example of a structure of the 2nd power converter circuit shown in Embodiment 1 of this invention. It is an example of a structure of the 2nd power converter circuit shown in Embodiment 1 of this invention. It is a flowchart for switching the operation mode shown in Embodiment 1 of this invention. It is simple explanatory drawing of the electric power flow of the power converter device shown in Embodiment 1 of this invention. It is simple explanatory drawing of the electric power flow of the power converter device shown in Embodiment 1 of this invention. It is simple explanatory drawing of the electric power flow of the power converter device shown in Embodiment 1 of this invention. It is simple explanatory drawing of the electric power flow of the power converter device shown in Embodiment 1 of this invention. It is simple explanatory drawing of the electric power flow of the power converter device shown in Embodiment 1 of this invention. It is simple explanatory drawing of the electric power flow of the power converter device shown in Embodiment 1 of this invention. It is simple explanatory drawing of the electric power flow of the power converter device shown in Embodiment 1 of this invention. It is simple explanatory drawing of the electric power flow of the power converter device shown in Embodiment 1 of this invention. It is the table | surface which put together the control method of each circuit of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 1 of this invention. It is a control block diagram of the power converter device shown in Embodiment 2 of this invention. It is a control block diagram of the power converter device shown in Embodiment 2 of this invention. It is a control block diagram of the power converter device shown in Embodiment 2 of this invention. It is a control block diagram of the power converter device shown in Embodiment 2 of this invention. It is a control block diagram of the power converter device shown in Embodiment 2 of this invention. It is a control block diagram of the power converter device shown in Embodiment 2 of this invention.

Embodiment 1 FIG.
A power converter according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a circuit diagram showing a configuration of a power supply system including a power conversion device according to Embodiment 1 of the present invention. In the drawings and the following description, the same or similar components are denoted by the same reference numerals.

The power supply system shown in Embodiment 1 of the present invention includes an AC power supply 1, a power conversion device 2, a non-contact power transmission / reception circuit 3, and a load 4. The AC power source 1 is connected to the power converter 2 and the non-contact power transmission / reception circuit 3, and the load 4 is connected to the power converter 2. The power conversion device 2 is connected to the AC power supply 1 by a wired method (contact power supply method), while the non-contact power transmission / reception circuit 3 is a power conversion device 2 by a wireless method (non-contact power supply method). And is configured to be able to supply power in both directions. This power supply system is applied to, for example, a power supply system centered on a charger of an electric vehicle. The AC power supply 1 is a commercial AC system, a private generator, etc., and a load 4 is a high-voltage battery for vehicle travel. In addition, a lead battery which is a power source for vehicle electrical components can be applied. Needless to say, the AC power supply 1 and the load 4 are not limited to those described above.

The power conversion device 2 includes a first power conversion circuit 20 having one end connected to the AC power source 1, a DC capacitor for integration 21, a second power conversion circuit 22 having one end connected to the load 4, and a non-contact power transmission / reception circuit 3 includes a third power conversion circuit 23 that can be magnetically coupled to the control circuit 3 and a control circuit 25 that controls the first to third power conversion circuits. The first power conversion circuit 20 and the second power conversion circuit 22 are connected via an integration DC bus 24, and the integration DC capacitor 21 and the third power conversion circuit 23 are also integrated DC bus. 24. Here, the direction in which power is supplied from the AC power source 1 or the non-contact power transmission / reception circuit 3 to the load 4 is referred to as the forward direction, and the direction in which power is supplied from the load side to the AC power source 1 or the non-contact power transmission / reception circuit 3 side is reversed. It shall be called a direction.

The connection position of the third power conversion circuit 23 and the integration DC capacitor 21 with the integration DC bus 24 is not limited to that shown in FIG. That is, in the power conversion device 2 shown in FIG. 1, the output terminal of the third power conversion circuit 23 is connected to the AC power supply 1 side from the connection point between the integration DC capacitor 21 and the integration DC bus 24. The output terminal of the third power conversion circuit 23 may be connected to the load 4 side.

The first power conversion circuit 20 includes a first converter circuit 201, a DC link capacitor 202, an inverter circuit 203, an insulating transformer 204, and a second converter circuit 205. The first power conversion circuit 20 has one end connected to the AC power source 1 and the other end connected to the second power conversion circuit 22 via the integration DC bus 24, and receives an input voltage input from the AC power source 1. The power is converted into a predetermined DC voltage and output to the integration DC bus 24. The first power conversion circuit 20 is physically connected to the AC power supply 1 by a cable, a connector, or the like, and power is supplied to the AC power supply 1 by a wired method (contact power supply method).

The first converter circuit 201 includes switching elements 201a to 201d and

AC reactors

201e and 201f, and the switching elements 201a to 201d are connected in a full bridge type. One end of the AC reactor 201e is connected to the AC power source 1, and the other end is connected to a connection point between the switching element 201a and the switching element 201b. One end of the AC reactor 201f is connected to the AC power source 1, and the other end is connected to a connection point between the switching element 201c and the switching element 201d.

The first converter circuit 201 controls the duty ratios (ON time) of the switching elements 201a to 201d so that the AC input current i _ac follows the target sine wave current i _ac * based on a command from the control circuit 25. It has the function to do. Further, based on a command from the control circuit 25, a function of controlling the duty ratios (ON time) of the switching elements 201a to 201d so that the DC voltage V _link of the DC link capacitor 202 follows the target DC voltage V _link *. Have In addition to controlling the duty ratio of the switching element, the phase shift amount and the switching frequency may be controlled.

In the power conversion device shown in FIG. 1, the

AC reactors

201e and 201f are connected to the AC bipolar side, respectively, but may be connected to only one side. In other words, only one of

AC reactors

201e and 201f may be used. The switching elements 201a to 201d are not limited to IGBT (Insulated Gate Bipolar Transistor) or MOSFET (Metal Oxide Semiconductor Semiconductor Field Effect Transistor), but also SiC (Silicon Carbon) -MOSFET, GaN (Gallium Nitride) -FET (Field Effect). Transistor) or GaN-HEMT (High-Electron-Mobility-Transistor) may be used.

The DC link capacitor 202 is provided between the first converter circuit 201 and the inverter circuit 203. One end of the DC link capacitor 202 is connected to the positive side of the DC bus connecting the first converter circuit 201 and the inverter circuit 203, and the other end is connected to the negative side of the DC bus. Yes.

The inverter circuit 203 includes switching elements 203a to 203d, and the switching elements 203a to 203d are configured as a full bridge type. Further, the DC side terminal of the inverter circuit 203 is connected to the first converter circuit 201 and the DC link capacitor 202 by a DC bus, and the AC side terminal is connected to the insulating transformer 204. That is, the connection point between the switching element 203a and the switching element 203b connected in series is connected to the first end of the isolation transformer 204, and the connection point of the switching element 203c and the switching element 203d connected in series is connected to the isolation transformer 204. Connected to the second end.

The insulating transformer 204 includes two windings that are magnetically coupled to each other, and a winding connected to the first end and the second end is referred to as a primary side winding. The winding connected to the third end and the fourth end is referred to as a secondary winding.

The second converter circuit 205 includes switching elements 205a to 205d configured as a full bridge type and a first DC capacitor 205e. A connection point between the switching element 205a and the switching element 205b connected in series is connected to the third end of the isolation transformer 204, and a connection point between the switching element 205c and the switching element 205d connected in series is a fourth point of the isolation transformer 204. Connected to the end.

In the following description, the inverter circuit 203, the insulating transformer 204, and the second converter circuit 205 may be collectively referred to as an insulating converter circuit. Based on a command from the control circuit 25, the isolated converter circuit causes the switching elements 203a to 203d and the switching elements 205a to 205d to follow the DC voltage V _link of the DC link capacitor 202 to the target DC voltage V _link *. It has a function of controlling the duty ratio (ON time). Further, the isolated converter circuit, based on a command from the control circuit 25, switches the switching elements 203a to 203d and the switching element 205a so that the DC voltage V _int of the integrating DC capacitor 21 follows the target DC voltage V _int *. It has a function of controlling a duty ratio (ON time) of .about.205d. In addition to controlling the duty ratio of the switching element, the phase shift amount and the switching frequency may be controlled.

Also, a low-loss soft switching operation is possible by connecting an inductor or a capacitor in series or in parallel to the primary side or secondary side winding of the isolated converter circuit of FIG. At this time, the inductor may be externally attached, or the leakage inductance or exciting inductance of the insulating transformer 204 may be used. The switching elements 203a to 203d and the switching elements 205a to 205d are not limited to IGBTs and MOSFETs, and SiC-MOSFETs, GaN-FETs, and GaN-HEMTs may be used.

Since the power conversion device according to the present embodiment uses an isolated converter circuit for the first power conversion circuit 20, compared with the case where a non-insulated converter circuit that does not include an insulation transformer is used, Reliability can be increased. That is, while the first power conversion circuit 20, the second power conversion circuit 22, and the third power conversion circuit 23 operate simultaneously to supply power to the load, the second converter circuit 205 Even if any of the third converter circuit 230 and the second power conversion circuit 22 fails, the power conversion apparatus is provided with the insulating transformer 204 of the first power conversion circuit 20 and the third power conversion circuit 23. Since the AC input side and the load side are electrically insulated by the non-contact power transmission / reception coil 231, the AC input side is not affected. Similarly, when either the first converter circuit 201 or the inverter circuit 203 fails, the AC input side and the load side are electrically insulated by the insulating transformer 204 and the non-contact power transmission / reception coil 231. Therefore, the possibility of battery failure can be reduced.

The second power conversion circuit 22 is connected to the first power conversion circuit 20, the third power conversion circuit 23, and the integration DC capacitor 21 by the positive and negative electrodes of the integration DC bus 24. The second power conversion circuit 22 includes switching elements 220a to 220b, a DC reactor 220c, and a DC output capacitor 220d, and has a step-down chopper configuration. The switching element 220a has one end connected to the positive side of the integration DC bus and the other end connected to the DC reactor 220c. The switching element 220b has one end connected to a connection point between the switching element 220a and the DC reactor 220c, and the other end connected to the negative electrode side of the integration DC bus. The DC output capacitor 220d has one end connected between the DC reactor 220c and the output terminal, and the other end connected to the negative electrode side of the integration DC bus.

Based on a command from the control circuit 25, the second power conversion circuit 22 sets the duty ratios of the switching elements 220a to 220b so that the DC voltage V _int of the integrating DC capacitor 21 follows the target DC voltage V _int *. On-time). In addition, the control circuit 25 controls the duty ratio (ON time) of the switching elements 220a to 220b so that the DC output current _Iout follows the target output current _Iout *. In addition to controlling the duty ratio of the switching element, the phase shift amount and the switching frequency may be controlled. The switching elements 220a to 220b are not limited to IGBTs and MOSFETs, but may be SiC-MOSFETs, GaN-FETs, or GaN-HEMTs.

Although the second power conversion circuit 22 shown in FIG. 1 has a step-down chopper configuration, it may have a step-up chopper configuration, a step-up / step-down chopper configuration, or an isolated converter configuration. Further, the configuration of the second power conversion circuit 22 is not limited to the configuration of FIG. 1 alone, and a multi-layer interleaved configuration in which a plurality of legs and reactors composed of two switching elements are connected as shown in FIG. Therefore, a simple multi-parallel configuration may be used. Multi-phase interleaved configuration reduces the amount of current flowing into each switching element and DC reactor, reducing conduction loss and reducing the current ripple on the output capacitor, extending the life of the capacitor. And downsizing can be realized.

The third power conversion circuit 23 includes a third converter circuit 230, a second DC capacitor 232, and a non-contact power transmission / reception coil 231. The third converter circuit 230 includes switching elements 230a to 230d configured in a full bridge type. A connection point where the switching element 230a and the switching element 230b are connected in series is connected to a first end of the non-contact power transmission and reception coil 231, and a connection point where the switching element 230c and the switching element 230d are connected in series. It is connected to the second end of the non-contact power transmission / reception coil 231. The non-contact power transmission / reception coil 231 receives power in a non-contact manner by being magnetically coupled to a non-contact power transmission / reception circuit. The third power conversion circuit 23 uses the control circuit 25 to control the duty ratio (on time) of the switching elements 230a to 230d instead of the isolated converter circuit or the second power conversion circuit. 21 has a function of causing the DC voltage V _{int of} 21 to follow the target DC voltage V _int *. The switching elements 230a to 230d are not limited to IGBTs and MOSFETs, but may be SiC-MOSFETs, GaN-FETs, or GaN-HEMTs. Further, a capacitor may be connected in series or in parallel to the non-contact power transmission / reception coil 231.

The integration DC capacitor 21 is a DC capacitor having one end connected to the positive electrode side of the integration DC bus 24 and the other end connected to the negative electrode side of the integration DC bus 24. As shown in FIG. 1, the input power from the first power conversion circuit that supplies power by the contact power supply method and the input power from the third power conversion circuit that supplies power by the non-contact power supply method are integrated DC. It is configured to integrate with a capacitor. In the power supply system shown in FIG. 1, the integration DC capacitor 21 is shown as a single capacitor, but a multi-parallel multi-series configuration may be used by using a plurality of capacitors. For example, as shown in FIG. 3, when two

capacitors

21a and 21b having the same capacity are connected in series to operate as an integration DC capacitor 21, it is connected to the load 4 and is connected to the

capacitor

21a and 21b (neutral point). A half-bridge configuration using a point potential may be used.

The power conversion apparatus 2 of the present invention includes first to fourth voltage detectors 26a to 26d and first to second current detectors 27a to 27b. The first voltage detector 26 a detects the AC input voltage _vac input from the AC power supply 1 to the first power conversion circuit 20, and the second voltage detector 26 b detects the DC voltage V of the DC link capacitor 202. _Link is detected. The third voltage detector 26 c detects the DC voltage V _int of the integration DC capacitor 21, and the fourth voltage detector 26 d detects the DC output voltage output to the load 4. In the example illustrated in FIG. 1, the fourth voltage detector 26 d detects the DC output voltage V _out of the DC output capacitor 220 d that is a component of the second power conversion circuit 22.

The first current detector 27a detects an AC input current i _ac input from the AC power source 1 to the first power conversion circuit. In the example illustrated in FIG. 1, the first current detector 27 a detects a current flowing through the AC reactor 201 e that is a component of the first power conversion circuit 20. The second current detector 27 b detects the DC output current I _out output to the load 4. In the example illustrated in FIG. 1, the second current detector 27 b detects the current i _out of the DC reactor 220 c that is a component of the second power conversion circuit 22. Each detector inputs the detected value of each voltage and current to the control circuit 25, and the control circuit 25 performs an operation based on these detected values. These calculation results are output to the gate terminals of the switching elements 201a to 201d, the switching elements 203a to 203d, the switching elements 205a to 205d, the switching elements 220a to 220b, and the switching elements 230a to 230d, respectively.

The control circuit 25 can control the first to third power conversion circuits and controls the switching elements included in each power conversion circuit. That is, the control circuit 25 performs the first to fourth voltage detectors 26a to 26d and the first to fourth voltage detectors 26a to 26d and the first to second current detectors 27a to 27b based on part or all of the detection results. A drive signal is transmitted to each switching element included in the power conversion circuit 3 and a desired operation can be performed by controlling on / off of the switching element. The role of the control circuit 25 during forward operation and reverse operation will be described below.

The role of the control circuit 25 during forward operation will be described. During forward operation, the control circuit 25 calculates the duty ratio of each switching element for controlling the AC input current i _ac so that the value of the power factor becomes 1. Specifically, a sinusoidal predetermined current command (target sine wave current) i _ac * synchronized with the AC input voltage v _ac and the AC input current i _ac detected by the first current detector. Calculate the current difference. The output is calculated by PI control using the calculated current difference as a feedback amount. Regarding the DC voltage V _link of the DC link capacitor 202, a predetermined voltage command (target DC voltage of the DC link capacitor) V _link * and the DC voltage of the DC link capacitor 202 obtained from the second voltage detector 26b. The voltage difference from V _link is calculated. The output is calculated by PI control using the calculated voltage difference as a feedback amount.

During forward operation, the control circuit 25 controls the DC voltage V _int and the DC output voltage V _out of the integration DC capacitor. Specifically, the control circuit 25 determines a predetermined voltage command (target DC voltage of the integration DC capacitor) V _int * and the DC voltage of the integration DC capacitor 21 obtained from the third voltage detector 26c. A voltage difference from V _int is calculated, and the output is calculated by PI control using the calculated voltage difference as a feedback amount. For the DC output voltage _Vout , the control circuit 25 calculates a voltage difference between a predetermined voltage command (target output voltage) _Vout * and the DC output voltage _Vout obtained from the fourth voltage detector 26d. calculate. The output is calculated by PI control using the calculated voltage difference as a feedback amount. The DC output current _{I out,} is calculated with a predetermined current command (target output _{current) I out} *, the voltage difference between the DC output current _{I out} obtained from the second current detector 27b. The output is calculated by PI control using the calculated voltage difference as a feedback amount.

Next, the role of the control circuit 25 during reverse operation will be described. Regarding the DC voltage V _int of the integration DC capacitor, a predetermined voltage command (target DC voltage of the integration DC capacitor) V _int * and the integration DC capacitor 21 obtained from the third voltage detector 26c are used. A voltage difference from the DC voltage V _int is calculated. The output is calculated by PI control using the calculated voltage difference as a feedback amount. Regarding the DC voltage V _link of the DC link capacitor 202, a predetermined voltage command (target DC voltage of the DC link capacitor) V _link * and the DC voltage of the DC link capacitor 202 obtained from the second voltage detector 26b. The voltage difference from V _link is calculated. The output is calculated by PI control using the calculated voltage difference as a feedback amount. For the AC input voltage _vac , the duty ratio for controlling the AC input voltage _vac is calculated so that the AC voltage obtained from the first voltage detector 26a is sinusoidal. Specifically, a target sine wave voltage v _ac * obtained by multiplying a predetermined AC voltage effective value command value (target effective voltage value) V _{ac, rms} * by a sine wave having an amplitude of √2, A voltage difference from the AC input voltage _vac detected by the first voltage detector 26a is calculated. The output is calculated by PI control using the calculated voltage difference as a feedback amount.

The non-contact power transmission / reception circuit 3 is a circuit outside the power conversion device 2 shown in the present embodiment, and includes switching elements 300a to 300d, a DC link capacitor 300e, switching elements 300f to 300i, AC reactors 300j to 300k, and A non-contact power transmission / reception coil 301 is provided. The switching elements 300a to 300d and the switching elements 300f to 300i are each connected in a full bridge type. As in the first converter circuit 201, the non-contact power transmission / reception circuit 3 is connected to the AC power source 1 at one end of the AC reactor 300k and the AC reactor 300j, and the other end of the AC reactor 300j is switched to the switching element 300a. It is connected to a connection point with the element 300b. The other end of AC reactor 300k is connected to a connection point between switching element 300c and switching element 300d.

The DC link capacitor 300e is connected to the positive and negative electrodes of a DC bus connecting the switching elements 300a to 300d and the switching elements 300f to 300i. The switching elements 300f to 300i are connected to the non-contact power transmission / reception coil 301, and the connection point between the switching element 300f and the switching element 300g connected in series is connected to the first end of the non-contact power transmission / reception coil 301. The contact point between the switching element 300h and the switching element 300i to be connected is connected to the second end of the non-contact power transmission / reception coil 301.

The non-contact power transmission / reception circuit 3 is configured to contactlessly generate power by magnetically coupling the input voltage from the AC power source 1 to the non-contact power transmission / reception coil 231 based on a command from a control circuit not shown in FIG. Supply. That is, the input power from the AC power source 1 is converted into power and supplied to the non-contact power transmission / reception coil 231 via the non-contact power transmission / reception coil 301. The non-contact power transmission / reception circuit 3 may be any one as long as it can supply electric power in a non-contact manner by being magnetically coupled to the non-contact power transmission / reception coil 231. It is not limited at all. In addition, the non-contact power transmission / reception circuit 3 shown in the present embodiment is connected to the AC power source 1 similarly to the first power conversion circuit 20 and is configured to receive an AC voltage from the AC power source 1. It is not limited to this, The structure connected with a different power supply may be sufficient.

Next, the operation will be described.
The power conversion device according to the present embodiment can operate in a plurality of operation modes by combining the operation patterns of the power conversion circuits that are constituent elements. FIG. 4 shows an example of a flowchart for switching the operation mode. As shown in FIG. 4, the AC input voltage v _ac detected by the first voltage detector 26a, the DC output voltage V _out detected by the fourth voltage detector 26d, and the second current detector 27b are obtained. A power conversion circuit that switches the operation mode and operates from the first to third power conversion circuits based on the DC output current I _out of the DC reactor 220c to be generated and the non-contact power supply control signal described in detail below. It becomes possible to select. Hereinafter, for convenience, the load 4 is described as a DC battery.

Here, the control signal for non-contact power supply refers to a signal indicating whether power can be supplied from the non-contact power transmission / reception circuit 3 to the third power conversion circuit 23 by the non-contact power supply method, for example, a non-contact power transmission / reception coil 301, or a voltage detection signal generated when a voltage in the non-contact power transmission / reception coil 231 is detected, and exchange between the non-contact power transmission / reception circuit 3 and the third power conversion circuit 23 to determine whether power supply is possible. A communication signal for performing. Note that the contactless power supply control signal here does not limit this term or specific means.

The operation mode switching method in the present embodiment will be described with reference to FIG. 4 as an example, but the switching method is not limited to the means shown in FIG. In FIG. 4, the load 4 is described as an example of a DC battery for driving a vehicle. However, the present invention is not limited to this. For example, a DC voltage power supply, an electric double layer capacitor (EDLC), an electric double layer capacitor, It may be a fixed resistance load.

In operating the power conversion device according to the present embodiment, power is transferred between the first power conversion circuit 20 and the third power conversion circuit 23 without first charging and discharging the load (DC battery) 4. Is determined (step S100). As a selection method in step S100, for example, there is a method in which a changeover switch is provided in the vehicle and the switch is selected according to the intended use desired by the user. Note that the switching method is not limited to this.

When it is selected in step S100 that power is not transferred between the first power conversion circuit 20 and the third power conversion circuit 23, the process proceeds to step S200. In step S200, the detection result of the DC output voltage _{V out} resulting from the fourth voltage detector 26 d, from the detection result of the obtained _{I out} from the second current detector 27b, the charging state of the load 4 is determined in advance The ECU or an engine control unit (ECU) in the vehicle determines whether the threshold is equal to or greater than the threshold. Here, the threshold value of the state of charge is a value that serves as a reference for performing the forward operation or the reverse operation, and changes depending on the vehicle and a predetermined condition.

If it is determined in step S200 that the charge state of the load 4 is less than the threshold value, that is, if it is determined that the load 4 needs to be charged, the process proceeds to step S210. In step S210, it is determined whether or not there is an AC input voltage _vac detected by the first voltage detector 26a and a non-contact power supply control signal.

As a result of step S210, when both the AC input voltage _vac and the non-contact power supply control signal are detected, the operation mode M1 is entered. This operation mode is referred to as a first operation mode. In the first operation mode, the first to third power conversion circuits are operated simultaneously. FIG. 5 is a simplified diagram showing a case where the first power conversion circuit 20, the second power conversion circuit 22, and the third power conversion circuit 23 are operating. The first operation mode is a mode in which power is supplied from both the contact power supply method and the non-contact power supply method and is output to the load 4. The first operation mode is divided into a CP control mode (constant power control mode) and a CC control mode (constant current control mode) according to the control method.

First, the CP control mode (constant power control mode) will be described. In the CP control mode, the control circuit 25 calculates an output so that the AC input current i _ac obtained from the first current detector 27a follows the target sine wave current i _ac *. On / off control of the switching elements 201a to 201d of the first converter circuit 201 is performed based on this output value. Further, the control circuit 25 calculates the output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link * of the DC link capacitor. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 and the switching elements 205a to 205d of the second converter circuit 205 is performed.

The non-contact power transmission / reception coil 231 receives power supplied from the non-contact power transmission / reception circuit 3 outside the apparatus. The control circuit 25 calculates the output so that the DC voltage V _int of the integration DC capacitor detected by the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 230a to 230d of the third power conversion circuit 23 is performed based on the calculated output value. At this time, the second power conversion circuit 22 in the subsequent stage has a fixed duty ratio when the load 4 is a DC voltage source. When it is necessary to control the voltage of the load 4, the control circuit 25 calculates the output so that the DC output voltage _Vout obtained from the fourth voltage detector 26d follows the target output voltage _Vout *. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value.

Note that the second power conversion circuit 22 may be controlled so that the DC voltage V _int of the integration DC capacitor follows the target DC voltage V _int *. In this case, the switching element of the third power conversion circuit 23 is switched with a fixed duty ratio so that the second power conversion circuit 22 can obtain the DC voltage V of the integration DC capacitor obtained from the third voltage detector 26c. _{On /} off control of the switching elements 220a to 220b is performed based on the output value calculated by the control circuit 25 so that _int follows the target DC voltage _Vint *.

Next, the CC control mode (constant current control mode) will be described. In the CC control mode, the control circuit 25 calculates the output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link *. On / off control of the switching elements 201a to 201d of the first converter circuit 201 is performed based on this output value. Further, the control circuit 25 calculates an output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 and the switching elements 205a to 205d of the second converter circuit 205 is performed.

At this time, the non-contact power transmission / reception coil 231 receives the power supplied from the non-contact power transmission / reception circuit 3 outside the apparatus. The control circuit 25 outputs a fixed duty ratio to switch the switching elements 230a to 230d of the third power conversion circuit 23.

Note that the third power conversion circuit 23 may be controlled such that the DC voltage V _int of the integration DC capacitor follows the target DC voltage V _int *. In this case, the switching elements 203a to 203d of the inverter circuit 203 and the switching elements 205a to 205d of the second converter circuit 205 are respectively switched with a fixed duty ratio, and the control circuit 25 obtains from the third voltage detector 26c. The output is calculated so that the DC voltage V _int of the integrated DC capacitor to follow the target DC voltage V _int *. On / off control of the switching elements 230a to 230d of the third power conversion circuit 23 is performed based on this output value. Further, the control circuit 25, so as to follow the DC output current _{I out} obtained from the second current detector 27b to the target output current _{I out} *, calculates the output. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value.

In the first operation mode, the power supply is performed by simultaneously operating the contact power supply method and the non-contact power supply method, so that the sum of the rated powers (total input power) can be supplied to the load. For this reason, when the load is a battery, double speed charging is possible by setting the rated power of each method to the same value. Here, since each system is integrated with the DC capacitor for integration, stable simultaneous power supply can be performed without being limited to the voltage of any system. The above is the description of the first operation mode.

Next, the second operation mode will be described. When only the AC input voltage _vac obtained from the first voltage detector 26a is detected in step S210 of FIG. 4, the operation mode M2 is entered. In the second operation mode, the first power conversion circuit 20 and the second power conversion circuit 22 are operated simultaneously. FIG. 6 is a simplified diagram showing a case where only the contact power feeding method, that is, only the first power conversion circuit 20 and the second power conversion circuit 22 are used. Details of the second operation mode will be described. The second operation mode is a forward operation in which power is supplied from the AC power source to the load side, and there is a constant power (CP) control mode and a constant current (CC) mode for the load side as in the first operation mode. .

First, the CP control mode will be described. In the CP control mode, the control circuit 25 calculates an output so that the AC input current i _ac obtained from the first current detector follows the target sine wave current i _ac *. Based on this output value, on / off control of the switching elements 201a to 201d of the first converter circuit 201 in the first power conversion circuit 20 is performed. Further, the control circuit 25 calculates an output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link *. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 and the switching elements 205a to 205d of the second converter circuit 205 is performed. In addition, the control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value.

Next, the CC control mode will be described. In the CC control mode, the control circuit 25 calculates the output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link *. Based on this output value, on / off control of the switching elements 201a to 201d of the first converter circuit 201 in the first power conversion circuit 20 is performed. Further, the control circuit 25 calculates an output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 and the switching elements 205a to 205d of the second converter circuit 205 is performed. Further, the control circuit 25, so as to follow the DC output current _{I out} obtained from the second current detector 27b to the target output current _{I out} *, calculates the output. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value.

When only the contactless power supply control signal is detected in step S210 of FIG. 4, the process proceeds to the operation mode M3. This operation mode is referred to as a third operation mode. In the third operation mode, the second power conversion circuit 22 and the third power conversion circuit are operated simultaneously. FIG. 7 is a simplified diagram showing a case where only the non-contact power feeding method, that is, only the third power conversion circuit 23 and the second power conversion circuit 22 are used.

Details of the third operation mode will be described. The third operation mode is a forward operation in which power is supplied from the non-contact power transmission / reception unit to the load side. Similar to the first operation mode, the constant power (CP) control mode and the constant current (CC) mode for the load side are used. Exists.

First, the CP control mode will be described. In the CP control mode, the non-contact power transmission / reception coil 231 receives power supplied from the non-contact power transmission / reception circuit 3 outside the apparatus. The control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 230a to 230d of the third power conversion circuit 23 is performed based on this output value. At this time, the second power conversion circuit 22 in the subsequent stage has a fixed duty ratio when the load is a DC voltage source. When it is necessary to control the load voltage, the control circuit 25 calculates the output so that the DC output voltage _Vout obtained from the fourth voltage detector 26d follows the target output voltage _Vout *. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value.

Note that the second power conversion circuit 22 may be controlled so that the DC voltage V _int of the integration DC capacitor follows the target DC voltage V _int *. In this case, the switching elements 230a to 230d of the third power conversion circuit 23 are switched with a fixed duty ratio, and the DC voltage V _int of the integration DC capacitor obtained from the third voltage detector 26c is set to the target DC voltage V Based on the output value calculated by the control circuit 25, on / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed so as to follow _int *.

Next, the CC control mode will be described. In the CC control mode, the non-contact power transmission / reception coil 231 receives power supplied from the non-contact power transmission / reception circuit 3 outside the apparatus. The control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 230a to 230d of the third power conversion circuit 23 is performed based on this output value. Further, the control circuit 25, so as to follow the DC output current _{I out} obtained from the second current detector 27b to the target output current _{I out} *, calculates the output. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value. The above is the description of the third operation mode, and the operation mode M1 to the operation mode M3 is the forward operation mode.

If it is selected in step S100 in FIG. 4 that power is exchanged between the first power conversion circuit 20 and the third power conversion circuit 23, the process proceeds to step S300. In step S300, it is selected whether to supply power from the first power conversion circuit 20 side to the non-contact power transmission / reception coil 231 side. Here, as a selection method, for example, as in step S100, there is a method in which a changeover switch is provided in the vehicle and the switch is selected according to the intended use desired by the user. Note that the selection method is an example, and the present invention is not limited to this.

In step S300, when it is selected to supply power from the first power conversion circuit 20 side to the third power conversion circuit 23 side, the operation mode M4 is entered. This operation mode is referred to as a fourth operation mode. In the fourth operation mode, the first power conversion circuit 20 and the third power conversion circuit 23 are operated simultaneously. FIG. 8 is a simplified diagram showing a case where only the contact power feeding method and the non-contact power feeding method, that is, only the first power conversion circuit 20 and the third power conversion circuit 23 are used.

As a case where the fourth operation mode can be selected, for example, when the power device of the present invention is applied to a charger for charging a DC battery of an electric vehicle as shown in FIG. It is conceivable to charge a direct current battery of an electric vehicle that supports only non-contact charging in a place where it is not. In other words, the power obtained by the contact power supply method from the AC power supply is transmitted in a non-contact manner from the non-contact power transmission / reception coil of the electric vehicle equipped with this apparatus to the power reception coil of the electric vehicle that supports only the non-contact power supply method. Also, it becomes possible to charge a DC battery of an electric vehicle that supports only non-contact charging.

Details of the fourth operation mode will be described. The fourth operation mode is a mode in which power is supplied from the AC power source to the non-contact power transmission / reception circuit 3 outside the apparatus via the third power conversion circuit 23, and a constant power (CP) control mode for the non-contact power reception side. And there is a constant voltage (CV: Constant Voltage) mode for the DC capacitor side for integration.

First, the CP control mode will be described. In the CP control mode, the control circuit 25 calculates an output so that the AC input current i _ac obtained from the first current detector 27a follows the target sine wave current i _ac *. Based on this output value, on / off control of the switching elements 201a to 201d of the first converter circuit 201 in the first power conversion circuit 20 is performed. Further, the control circuit 25 calculates an output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link *. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 and the switching elements 205a to 205d of the second converter circuit 205 is performed. In addition, the control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 230a to 230d of the third power conversion circuit 23 is performed based on this output value. From these things, it becomes possible to supply electric power to the non-contact power transmission / reception circuit 3 outside the apparatus via the non-contact power transmission / reception coil 231.

Next, the CV control mode will be described. In the CV control mode, the control circuit 25 calculates an output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link *. Based on this output value, on / off control of the switching elements 201a to 201d of the first converter circuit 201 in the first power conversion circuit 20 is performed. In addition, the control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 and the switching elements 205a to 205d of the second converter circuit 205 is performed. At this time, the switching elements 230a to 230d, which are components of the third power conversion circuit 23, are switched at a fixed duty ratio. From these things, it becomes possible to supply electric power to the non-contact power transmission / reception circuit 3 outside the apparatus via the non-contact power transmission / reception coil 301. The above is the description of the fourth operation mode.

In step S300 of FIG. 4, when it is not selected to supply power from the first power conversion circuit 20 side to the third power conversion circuit 23 side, that is, from the third power conversion circuit 23 side to the first power conversion circuit 23 side. When it is selected that power is supplied to the power conversion circuit 20, the operation mode M5 is entered. This operation mode is referred to as a fifth operation mode. In the fifth operation mode, the first power conversion circuit 20 and the third power conversion circuit 23 are operated simultaneously. FIG. 9 is a simplified diagram illustrating a case where only the contact power feeding method and the non-contact power feeding method, that is, only the first power conversion circuit 20 and the third power conversion circuit 23 are used, as in FIG. 8.

As a case where the fifth operation mode can be selected, for example, when the apparatus of the present invention is applied to a charger of an electric vehicle, the battery power of the electric vehicle corresponding to only another non-contact power feeding method is not used. It is conceivable that AC power is output as AC power by the contact power supply method via this power conversion device by the contact power supply method, and AC power can be supplied as an alternative to an AC power source such as a commercial system.

Details of the fifth operation mode will be described. In the fifth operation mode, the power received by the third power conversion circuit 23 from the non-contact power transmission / reception circuit 3 by the non-contact power feeding method is supplied to the outside of the apparatus via the first power conversion circuit of the contact power feeding method. There is a constant voltage (CV: Constant Voltage) mode for the effective value on the system side.

In the CV control mode, power is transmitted from the non-contact power transmission / reception circuit 3 outside the apparatus via the non-contact power transmission / reception coil 231. The control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 230a to 230d of the third power conversion circuit 23 is performed based on this output value. Further, the control circuit 25 calculates an output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link *. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 in the first power conversion circuit 20 and the switching elements 205a to 205d of the second converter circuit 205 is performed. Further, the control circuit 25 outputs the AC input voltage v _ac obtained from the first voltage detector 26a so as to follow the target sine wave voltage v _ac * calculated from the target effective voltage value V _{ac, rms} *. Is calculated. Based on this output value, on / off control of the switching elements 201a to 201d of the first converter circuit is performed to supply AC power. The above is the description of the fifth operation mode, and the operation mode M4 to the operation mode M5 is a mode in which power is supplied between the first power conversion circuit 20 and the third power conversion circuit 23.

If it is determined in step S200 of FIG. 4 that the state of charge of the load (DC battery) 4 is equal to or greater than the threshold value, that is, if it is determined that the energy of the DC battery can be discharged, the process proceeds to step S220. In step S220, as in step S210, the AC input voltage _vac obtained from the first voltage detector 26a and the presence / absence of the contactless power supply control signal are determined.

As a result of S220, when both the AC input voltage _vac and the non-contact power supply control signal are detected, the operation mode M6 is entered. This operation mode is referred to as a sixth operation mode. In the sixth operation mode, the first to third power conversion circuits are operated simultaneously. FIG. 10 shows that the contact power feeding method and the non-contact power feeding method operate simultaneously during reverse operation, that is, the first power conversion circuit 20, the third power conversion circuit 23, and the second power conversion circuit 22 are simultaneously operated. It is the simple figure which showed the case where it is operate | moving.

Details of the sixth operation mode will be described. The sixth operation mode is a reverse operation in which power is supplied from the load 4 side to the AC power source 1 and the non-contact power transmission / reception circuit 3 outside the apparatus, and there is a CV control mode for the integration DC capacitor side.

In the CV control mode, the control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value. Further, the control circuit 25 calculates an output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link *. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 and the switching elements 205a to 205d of the second converter circuit 205 is performed. Further, the control circuit 25 outputs the AC input voltage v _ac obtained from the first voltage detector 26a so as to follow the target sine wave voltage v _ac * calculated from the target effective voltage value V _{ac, rms} *. Is calculated. Based on this output value, on / off control of the switching elements 201a to 201d of the first converter circuit 201 is performed to supply AC power. In addition, the control circuit 25 outputs a fixed duty ratio and switches the switching elements 230a to 230d of the third power conversion circuit 23, so that the non-contact outside the apparatus via the non-contact power transmission / reception coil 231. Power is supplied to the power transmission / reception circuit 3.

Although the case where the switching elements 230a to 230d of the third power conversion circuit 23 are on / off controlled at a fixed duty ratio is shown, the switching elements 220a to 220b of the second power conversion circuit 22 are turned on / off at a fixed duty ratio. It may be controlled. In that case, the control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 230a to 230d of the third power conversion circuit 23 is performed based on this output value.

In the sixth operation mode, the contact power supply method and the non-contact power supply method can be operated simultaneously to discharge from the load 4 side, and each method is integrated by the integration DC capacitor 21. It is possible to discharge stably and simultaneously without being limited to the voltage of the system. The above is the description of the sixth operation mode.

When only the AC input voltage _vac obtained from the first voltage detector 26a is detected in step S220 in FIG. 4, the operation mode M7 is entered. This operation mode is referred to as a seventh operation mode. In the seventh operation mode, the first power conversion circuit 20 and the second power conversion circuit 22 are operated simultaneously. FIG. 11 is a simplified diagram showing a case where only the contact power feeding method, that is, only the first power conversion circuit 20 and the second power conversion circuit 22 are used.

Details of the seventh operation mode will be described. The seventh operation mode is a reverse operation in which power is supplied from the load 4 side to the AC power supply 1, and there is a CV control mode for the integration DC capacitor side as in the sixth operation mode.

In the CV control mode, the control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value. Further, the control circuit 25 calculates an output so that the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b follows the target DC voltage V _link *. Based on this output value, on / off control of the switching elements 203a to 203d of the inverter circuit 203 in the first power conversion circuit 20 and the switching elements 205a to 205d of the second converter circuit 205 is performed. Further, the control circuit 25 outputs the AC input voltage v _ac obtained from the first voltage detector 26a so as to follow the target sine wave voltage v _ac * calculated from the target effective voltage value V _{ac, rms} *. Is calculated. Based on this output value, the on / off control of the switching elements 201a to 201d of the first converter circuit 201 is performed, and AC power can be supplied as an alternative to AC power supply such as a commercial system. The above is the description of the seventh operation mode.

If only the contactless power supply control signal is detected in step S220 in FIG. 3, the process proceeds to the operation mode M8. This operation mode is referred to as an eighth operation mode. In the eighth operation mode, the second power conversion circuit 22 and the third power conversion circuit 23 are operated simultaneously. FIG. 12 is a simplified diagram showing a case where only the non-contact power supply method, that is, only the third power conversion circuit 23 and the second power conversion circuit 22 are used.

Details of the eighth operation mode will be described. The eighth operation mode is a reverse operation in which power is supplied from the load 4 side to the non-contact power transmission / reception circuit 3 via the non-contact power transmission / reception coil 231. Similar to the sixth operation mode, the CV for the integration DC capacitor side is provided. A control mode exists.

In the CV control mode, the control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 220a to 220b of the second power conversion circuit 22 is performed based on the output value. In addition, the control circuit 25 outputs a fixed duty ratio and switches the switching elements 230a to 230d of the third power conversion circuit 23, so that the non-contact outside the apparatus via the non-contact power transmission / reception coil 231. Power is supplied to the power transmission / reception circuit 3.

Although the case where the switching elements 230a to 230d of the third power conversion circuit 23 are on / off controlled at a fixed duty ratio is shown, the switching elements 220a to 220b of the second power conversion circuit 22 are turned on / off at a fixed duty ratio. It may be controlled. In that case, the control circuit 25 calculates the output so that the DC voltage V _int of the integrating DC capacitor obtained from the third voltage detector 26c follows the target DC voltage V _int *. On / off control of the switching elements 230a to 230d of the third power conversion circuit 23 is performed based on this output value. The above is the description of the eighth operation mode, and the operation mode M6 to the operation mode M8 is the reverse operation mode.

FIG. 13 shows a list of control methods in each control mode of the power conversion device shown in the present embodiment. FIG. 13 shows that the control circuit 25 controls the value described in “Control Value” by controlling the circuit described in “Control Circuit”. Note that what is described as “fixed” in the control value column indicates that the circuit to be controlled is on / off controlled with a fixed duty ratio. Even when the second power conversion circuit 22 controls the DC output voltage _Vout , if the DC output voltage _Vout does not need to be controlled, the second power conversion circuit 22 is set at a fixed duty ratio. Will work.

Next, a method for controlling each circuit of the power conversion device according to the present embodiment will be described with reference to a control block diagram. First, in the control of the first converter circuit when the first converter circuit 201 is controlled so that the AC input current i _ac follows the target sine wave current i _ac *, the control blocks of FIGS. This will be described with reference to the drawings. This control is used in the CP control mode of the first operation mode, the CP control mode of the second operation mode, and the CP control mode of the fourth operation mode.

FIG. 14 is a control block diagram relating to the calculation of the duty ratio of the switching element of the first converter circuit 201 in the control circuit 25. In the control circuit 25, a subtractor 2501 calculates a current difference between a predetermined absolute value of the target sine wave current i _ac * and an absolute value of the AC input current i _ac detected by the first current detector 27a. To do. This calculated value is input to the proportional controller 2502, and the obtained output value is divided by the DC voltage V _link of the DC link capacitor. The adder 2504 adds the feedforward term 2503 expressed by Equation (1) to this division value, thereby outputting the duty ratio 2505 (Duty_201) of the switching element of the first converter circuit. Although the proportional controller 2502 is described here, it is needless to say that an integral controller or a proportional integral controller may be used and the control method is not limited.

FIG. 15 is a control block diagram relating to generation of a gate signal for driving the switching element of the first converter circuit 201 based on the duty ratio calculated in FIG. When the duty ratio 2505 of the switching element of the first converter circuit obtained in FIG. 14 is smaller than the carrier wave 2506 (V _car ), the output value 2508 (Sig — 201a) of the comparator 2507 becomes High, and the output of the comparator 2509 The value 2510 (Sig_201b) is Low. On the other hand, when the duty ratio 2505 of the switching element of the first converter circuit is larger than the carrier wave 2506 (V _car ), the output value 2508 (Sig_201a) of the comparator 2507 is Low and the output value 2510 (Sig_201b) of the comparator 2509 is low. ) Becomes High.

FIG. 16 is a control block diagram relating to control for switching the gate signal of the switching element of the first converter circuit in accordance with the polarity of the AC input voltage. As shown in FIG. 16, when the AC input voltage _vac is positive, the comparator 2511 outputs High. At this time, the multiplexer (MUX) 2512 outputs Sig_201b (2510) as the gate signal Gate_201a (2513) of the switching element 201a of the first converter circuit. The multiplexer (MUX) 2514 outputs Sig_201a (2508) as the gate signal Gate_201b (2515) of the switching element 201b of the first converter circuit. On the other hand, the multiplexer (MUX) 2516 outputs Low as the gate signal Gate_201c (2517) of the switching element 201c of the first converter circuit, and the multiplexer (MUX) 2518 outputs High to the gate signal of the switching element 201d of the first converter circuit. Output as Gate_201d (2519).

On the other hand, when the AC input voltage _vac is negative, the comparator 2511 outputs Low. At this time, the multiplexer (MUX) 2512 outputs Sig_201a (2508) as the gate signal Gate_201a (2513) of the switching element 201a of the first converter circuit. Further, the multiplexer (MUX) 2514 outputs Sig_201b (2510) as the gate signal Gate_201b (2515) of the switching element 201b of the first converter circuit. On the other hand, the multiplexer (MUX) 2516 outputs High as the gate signal Gate_201c (2517) of the switching element 201c of the first converter circuit. The multiplexer (MUX) 2518 outputs Low as the gate signal Gate_201d (2519) of the switching element 201d of the first converter circuit.

Next, in the inverter circuit 203 and the second converter circuit 205 in the case of controlling the isolated converter circuit so that the DC voltage V _link of the DC link capacitor follows the target DC voltage V _link * of the DC link capacitor. The control will be described with reference to control block diagrams shown in FIGS. This control is used in the CP control mode of the first control mode, the CP control mode of the second control mode, and the CP control mode of the fourth control mode.
FIG. 17 is a control block diagram relating to control for generating a phase shift amount of the gate signal of the second converter circuit 205 with respect to the gate signal of the inverter circuit 203. In the control circuit 25, the pre-target DC voltage of the DC link capacitor 202 defined _{V link} *, the subtractor 2520 the voltage difference between the DC voltage _{V link} of the DC link capacitor which is detected by the second voltage detector 26b calculate. By inputting the calculated value calculated by the subtractor 2520 to the proportional-plus-integral controller 2521, the first phase shift amount Trig_N (2522) is obtained. Further, by adding a constant 0.5 to the first phase shift amount Trig_N by the adder 2523, a second phase shift amount Trig_P (2524) is obtained. Here, the description is given using the proportional-plus-integral controller 2521. However, it goes without saying that a proportional controller or an integral controller may be used and the control method is not limited.

FIG. 18 is a control block diagram relating to generation of the gate signal of the inverter circuit 203. In the control circuit 25, when the carrier wave 2506 (V _car ) is larger than the constant 0.5, the output value 2526 of the comparator 2525 becomes High. At this time, by inputting the output value 2526 of the comparator 2525 to the negation circuit 2527, the output value 2528 of the negation circuit becomes Low.

On the other hand, when the carrier wave 2506 (V _car ) is smaller than the constant 0.5, the output value 2526 of the comparator 2525 is Low. At this time, by inputting the output value 2526 of the comparator 2525 to the negation circuit 2527, the output value 2528 of the negation circuit becomes High. The output value 2526 of the comparator 2525 is output as the gate signal Gate_203ad of the

switching elements

203a and 203d of the inverter circuit. Further, the output value 2528 of the negative circuit 2527 is output as the gate signal Gate_203bc of the switching elements 203b and 203c of the inverter circuit.

FIG. 19 is a control block diagram relating to the generation of the gate signal of the second converter circuit 205. When the first phase shift amount Trig_N (2522) obtained in FIG. 17 is smaller than the carrier wave 2506 (V _car ), the comparator 2529 outputs High. Further, at this time, if the second phase shift amount Trig_P (2524) is larger than the carrier wave 2506 (V _car ), the comparator 2530 outputs High.

On the other hand, when the first phase shift amount Trig_N (2522) is larger than the carrier wave 2506 (V _car ), the comparator 2529 outputs Low. Further, at this time, when the second phase shift amount Trig_P (2524) is smaller than the carrier wave 2506 (V _car ), the comparator 2530 outputs Low. An output value 2532 obtained by inputting the outputs of the two comparators (2529, 2530) to the AND circuit 2531 is output as the gate signal Gate_205ad of the switching element 205a and the switching element 205d of the second converter circuit. Further, the output value 2534 obtained by inputting the output value 2532 of the logical product circuit 2531 to the negative circuit 2533 is output as the gate signal Gate_205bc of the switching element 205b and the switching element 205c of the second converter circuit.

Next, the control of the third converter circuit 230 when the third power conversion circuit 23 is controlled so that the DC voltage V _int of the integration DC capacitor follows the target DC voltage V _int * is shown in FIG. 20 and the control block diagram shown in FIG. The control includes a CP control mode of the first operation mode, a CC control mode of the first operation mode, a CP control mode of the third operation mode, a CC control mode of the third operation mode, a CP control mode of the fourth operation mode, It is used in the CV control mode of the fifth operation mode, the CV control mode of the sixth operation mode, and the CV control mode of the eighth operation mode.

FIG. 20 is a control block diagram relating to the calculation of the duty ratio of the switching element of the third converter circuit 230 in the control circuit 25. The control circuit 25 subtracts a voltage difference between a predetermined target DC voltage V _int * of the integration DC capacitor and a DC voltage V _int of the integration DC capacitor detected by the third voltage detector 26c. Calculated by By inputting this calculated value to the proportional-plus-integral controller 2536, the duty ratio 2537 (Duty_230) of the switching element of the third converter circuit is obtained. Note that although the proportional-integral controller 2536 has been described here, it is needless to say that a proportional controller or an integral controller may be used and the control method is not limited.

FIG. 21 is a control block diagram relating to generation of the gate signal of the switching element of the third converter circuit 230 in the control circuit 25. As shown in FIG. 21, when the duty ratio 2537 (Duty_230) of the switching element of the third converter circuit obtained in FIG. 20 is smaller than the carrier wave 2506 (V _car ), the output value 2539 of the comparator 2538 is High. At this time, the output value 2541 of the comparator 2540 is Low.

On the other hand, when the duty ratio 2537 (Duty_230) of the switching element of the third converter circuit is larger than the carrier wave 2506 (V _car ), the output value 2539 of the comparator 2538 is Low. At this time, the output value 2541 of the comparator 2540 becomes High. The output value 2539 of the comparator 2538 is output as the gate signal Gate_230ad of the

switching elements

230a and 230d of the third converter circuit. Further, the output value 2541 of the comparator 2540 is output as the gate signal Gate_230bc of the switching element 230b and the switching element 230c of the third converter circuit.

A control method of the second power conversion circuit 22 when the second power conversion circuit 22 is controlled with a fixed duty ratio will be described with reference to a control block diagram shown in FIG. This control is used in the CP control mode of the first operation mode, the CP control mode of the third operation mode, the CV control mode of the sixth operation mode, and the CV control mode of the eighth operation mode.

The second power conversion circuit 22 is on / off controlled at a fixed duty ratio when the load 4 is a DC voltage source. FIG. 22 is a control block diagram for generating the gate signal of the switching element of the second power conversion circuit 22 with a fixed value in the control circuit 25. The fixed duty ratio 2542 obtained by substituting the predetermined target DC voltage V _int * of the DC capacitor for integration and the DC output voltage V _out to the load 4 into Equation (2) is a carrier wave 2506 (V _car ). Is smaller than the output value 2544 of the comparator 2543, it becomes High. At this time, the output value 2546 of the comparator 2545 is Low.

On the other hand, when the fixed duty ratio 2542 is larger than the carrier wave 2506 (V _car ), the output value 2544 of the comparator 2543 is Low. At this time, the output value 2546 of the comparator 2545 becomes High. The output value 2544 of the comparator 2543 is output as the gate signal Gate_220a of the switching element 220a of the second power conversion circuit. Further, the output value 2546 of the comparator 2545 is output as the gate signal Gate_220b of the switching element 220b of the second power conversion circuit.

FIG. 23 and FIG. 24 show the control method of the second power conversion circuit 22 when the second power conversion circuit 22 is controlled so that the DC output voltage V _out follows the target output voltage V _out *. This will be described with reference to the control block diagram shown. This control is used in the CP control mode of the first operation mode and the CP control mode of the third operation mode.
When the DC output voltage _Vout of the load 4 needs to be variably controlled, the second power is set so that the DC output voltage _Vout obtained from the fourth voltage detector 26d follows the target output voltage _Vout *. The conversion circuit 22 is controlled. FIG. 23 is a control block diagram related to generation of the duty ratio of the switching element of the second power conversion circuit 22 in the control circuit 25. In the control circuit 25, a subtractor 2547 calculates a voltage difference between a predetermined target output voltage V _out * of the load 4 and the DC output voltage V _out of the load 4 detected by the fourth voltage detector 26d. . By inputting this calculated value to the proportional-plus-integral controller 2548, the duty ratio 2549 (Duty_220) of the switching element of the second power conversion circuit 22 is obtained. Note that although the proportional-plus-integral controller 2548 is described here, it is needless to say that a proportional controller or an integral controller may be used and the control method is not limited.

FIG. 24 is a control block diagram relating to the generation of the gate signal of the switching element of the second power conversion circuit 22 in the control circuit 25. When the duty ratio 2549 (Duty_220) of the switching element of the second power conversion circuit 22 obtained in FIG. 23 is smaller than the carrier wave 2506 (V _car ), the output value 2544 of the comparator 2550 becomes High. At this time, the output value 2546 of the comparator 2551 is Low.

On the other hand, when the duty ratio 2549 (Duty_220) is larger than the carrier wave 2506 (V _car ), the output value 2544 of the comparator 2550 is Low. At this time, the output value 2546 of the comparator 2551 becomes High. The output value 2544 of the comparator 2543 is output as the gate signal Gate_220a of the switching element 220a of the second power conversion circuit. Further, the output value 2546 of the comparator 2545 is output as the gate signal Gate_220b of the switching element 220b of the second power conversion circuit.

A control method of the third power conversion circuit when the switching element of the third power conversion circuit 23 is switched at a fixed duty ratio will be described with reference to FIG. This control includes a CP control mode of the first operation mode, a CC control mode of the first operation mode, a CP control mode of the third operation mode, a CV control mode of the fourth operation mode, a CV control mode of the sixth operation mode, It is used in the CV control mode of 8 operation modes.

FIG. 25 is a control block diagram relating to the generation of the gate signal of the switching element of the third power conversion circuit 23 using the fixed duty ratio in the control circuit 25. When the fixed duty ratio 2552 is smaller than the carrier wave 2506 (V _car ), the output value 2539 of the comparator 2553 becomes High. At this time, the output value 2541 of the comparator 2554 is Low.

On the other hand, when the fixed duty ratio 2552 is larger than the carrier wave 2506 (V _car ), the output value 2539 of the comparator 2553 is Low. At this time, the output value 2541 of the comparator 2554 becomes High. The output value 2539 of the comparator 2553 is output as the gate signal Gate_230ad of the

switching elements

230a and 230d of the third converter circuit. The output value 2541 of the comparator 2554 is output as the gate signal Gate_230bc of the switching

elements

230b and 230c of the third converter circuit.

26 and FIG. 26 show a control method of the second power conversion circuit 22 in the case of controlling the second power conversion circuit 22 so that the DC voltage V _int of the integration DC capacitor follows the target DC voltage V _int *. This will be described with reference to the control block diagram shown in FIG. This control is used in the CP control mode of the first operation mode, the CP control mode of the second operation mode, and the CP control mode of the third operation mode.
FIG. 26 is a control block diagram relating to the generation of the duty ratio of the switching element of the second power conversion circuit 22 in the control circuit 25. The control circuit 25 subtracts the voltage difference between the predetermined target DC voltage V _int * of the integration DC capacitor 21 and the DC voltage V _int of the integration DC capacitor 21 detected by the third voltage detector 26c. It is calculated by the device 2555. By inputting this calculated value to the proportional-plus-integral controller 2556, the duty ratio 2549 (Duty_220) of the switching element of the second power conversion circuit 22 is obtained. Note that although the proportional-plus-integral controller 2556 is described here, it is needless to say that a proportional controller or an integral controller may be used and the control method is not limited.

The duty ratio 2549 (Duty_220) of the switching element of the second power conversion circuit 22 and the carrier wave 2506 (V _car ) obtained in FIG. 26 are compared using the control block diagram shown in FIG. The operation is the same as that described above, and a description thereof will be omitted. Thereby, as described above, the gate signals Gate_220a and Gate_220b of the switching element 220a and the switching element 220b of the second power conversion circuit are generated.

A control method of the first converter circuit 201 when the first converter circuit 201 is controlled so that the DC voltage V _link of the DC link capacitor follows the target DC voltage V _link * is shown in FIGS. This will be described with reference to FIG. This control is used in the CC control mode of the first control mode, the CC control mode of the second control mode, and the CV control mode of the fourth operation mode.
FIG. 27 is a control block diagram relating to the generation of the duty ratio of the switching element of the first converter circuit 201 in the control circuit 25. In the control circuit 25, a target DC voltage _{V link} * of the DC link capacitor 202 with a predetermined, subtractor a voltage difference between the DC voltage _{V link} of the DC link capacitor 202 detected by the second voltage detector 26b 2557 Calculated by By inputting the calculated value calculated by the subtracter 2557 to the proportional-plus-integral controller 2558, the duty ratio 2505 (Duty_201) of the switching element of the first converter circuit 201 is obtained. Note that although the proportional-plus-integral controller 2558 is described here, it is needless to say that a proportional controller or an integral controller may be used and the control method is not limited.

The duty ratio 2505 (Duty_201) of the switching element of the first converter circuit 201 obtained in FIG. 27 and the carrier wave 2506 (V _car ) are compared using the control block diagram shown in FIG. The operation of the control block diagram shown in FIG. 15 is the same as that described above, and a description thereof will be omitted. As a result, gate signals Sig_201a (2508) and Sig_201b (2510) for driving the switching elements of the first converter circuit are obtained as described above. By using these two gate signals (2508, 2510) and the control block diagram of FIG. 16, the gate signals sGate_201a (2513) to Gate_201d (2519) of the switching elements of the first converter circuit are generated as described above. .

Control of the inverter circuit 203 and the second converter circuit 205 in the case of controlling the isolated converter circuit so that the DC voltage V _int of the DC capacitor for integration follows the target DC voltage V _int * is shown in FIGS. This will be described with reference to FIG. This control is used in the CC control mode of the first operation mode, the CC control mode of the second control mode, and the CV control mode of the fourth control mode.
FIG. 28 is a control block diagram relating to generation of the phase shift amount of the gate signal of the second converter circuit 205 with respect to the gate signal of the inverter circuit 203 in the control circuit 25. The control circuit 25 subtracts a voltage difference between a predetermined target DC voltage V _int * of the integration DC capacitor and the DC voltage V _int of the integration DC capacitor 21 detected by the third voltage detector 26c. 2559. By inputting the calculated value calculated by the subtracter 2559 to the proportional-plus-integral controller 2560, the first phase shift amount Trig_N (2522) is obtained. Further, by adding a constant 0.5 to the first phase shift amount Trig_N by the adder 2561, the second phase shift amount Trig_P (2524) is obtained. Although the description has been given using the proportional-plus-integral controller 2560 here, it is needless to say that a proportional controller or an integral controller may be used and the control method is not limited.

By using the control block diagram shown in FIG. 18, the gate signals Gate_203ad of the

switching elements

203a and 203d of the inverter circuit 203 and the gate signals Gate_203bc of the switching elements 203b and 203c are obtained as described above. The operation of the control block diagram shown in FIG. Also, the two phase shift amounts obtained in FIG. 28 and the carrier wave 2506 (V _car ) are compared using the control block diagram shown in FIG. Thus, gate signals Gate_205ad (2532) and Gate_205bc (2534) for driving the switching elements of the second converter circuit are generated as described above.

A method for controlling the inverter circuit 203 and the second converter circuit 205 when the isolated converter circuit is controlled with a fixed duty ratio will be described. This control is used in the CC control mode of the first operation mode.
As described above, the gate signals Gate_203ad of the

switching elements

203a and 203d of the inverter circuit 203 and the gate signals Gate_203bc of the switching elements 203b and 203c are obtained from the control block diagram shown in FIG. The second converter circuit 205 is generated using the control block diagram shown in FIG. Specifically, when the carrier wave 2506 (V _car ) is larger than the constant 0.5, the output value 2532 of the comparator 2562 becomes High. At this time, by inputting the output value 2532 of the comparator 2562 to the negation circuit 2563, the output value 2534 of the negation circuit becomes Low.

On the other hand, when the carrier wave 2506 (V _car ) is smaller than the constant 0.5, the output value 2532 of the comparator 2562 is Low. At this time, by inputting the output value 2532 of the comparator 2562 to the negation circuit 2563, the output value 2534 of the negation circuit becomes High. The output value 2532 of the comparator 2562 is output as the gate signal Gate_205ad of the

switching elements

205a and 205d of the inverter circuit. Further, the output value 2534 of the negative circuit 2563 is output as the gate signal Gate_205bc of the switching

elements

205b and 205c of the inverter circuit.

The control of the second power conversion circuit 22 when the second power conversion circuit 22 is controlled so that the DC output current I _out follows the target output current I _out * will be described with reference to FIGS. 30 and 24. explain. This control is used in the CC control mode of the first operation mode, the CC control mode of the second operation mode, and the CC control mode of the third operation mode.
FIG. 30 is a control block diagram relating to generation of the duty ratio of the switching element of the second power conversion circuit 22 in the control circuit 25. In the control circuit 25, the DC output current _{I out} * that is determined in advance, and calculated by the subtractor 2564 the current difference between the DC output current _{I out} that is detected by the second current detector 27b. By inputting this calculated value to the proportional-plus-integral controller 2565, the duty ratio 2549 (Duty_220) of the switching element of the second power conversion circuit 22 is obtained. Here, the description is made using the proportional-plus-integral controller 2565, but it is needless to say that a proportional controller or an integral controller may be used and the control method is not limited.

Also, the duty ratio 2549 (Duty_220) obtained in FIG. 30 and the carrier wave 2506 (V _car ) are compared using the control block diagram of FIG. Thereby, as described above, the gate signals Gate_220a (2544) and Gate_220b (2546) for driving the switching elements of the second power conversion circuit 220 are generated.

Regarding the control method of the inverter circuit 203 and the second converter circuit when the isolated converter circuit is controlled so that the DC voltage V _link of the DC link capacitor follows the target DC voltage V _link * during reverse operation. This will be described with reference to control block diagrams shown in FIGS. This control is used in the CV control mode of the fifth operation mode, the CV control mode of the sixth operation mode, and the CV control mode of the seventh operation mode.
FIG. 31 is a control block diagram for generating a phase shift amount of the gate signal of the inverter circuit 203 with respect to the gate signal of the second converter circuit 205 in the control circuit 25 when the isolated converter circuit operates in the reverse direction. In the control circuit 25, a subtracter 2566 calculates a voltage difference between a predetermined target DC voltage V _link * of the DC link capacitor and a DC voltage V _link of the DC link capacitor detected by the second voltage detector 26b. To do. By inputting this calculated value to the proportional-plus-integral controller 2567, the first phase shift amount Trig_N_inv (2568) is obtained. Further, by adding a constant 0.5 to the first phase shift amount Trig_N_inv by the adder 2569, the second phase shift amount Trig_P_inv (2570) is obtained. Note that although the proportional-plus-integral controller 2567 is described here, it is needless to say that a proportional controller or an integral controller may be used and the control method is not limited.

FIG. 32 is a control block diagram for generating the gate signal of the second converter circuit 205 when the control circuit 25 operates in the reverse direction of the isolated converter circuit. In the control circuit 25, when the carrier wave 2506 (V _car ) is larger than the constant 0.5, the output value 2572 of the comparator 2571 becomes High. At this time, by inputting the output value 2572 of the comparator 2571 to the negation circuit 2573, the output value 2574 of the negation circuit becomes Low. On the other hand, when the carrier wave 2506 (V _car ) is smaller than the constant 0.5, the output value 2572 of the comparator 2571 becomes Low. At this time, by inputting the output value 2572 of the comparator 2571 to the negation circuit 2573, the output value 2574 of the negation circuit becomes High. The output value 2572 of the comparator 2571 is output as the gate signal Gate_205bc_inv of the switching

elements

205b and 205c of the second converter circuit. Further, the output value 2574 of the negation circuit 2573 is output as the gate signal Gate_205ad_inv of the

switching elements

205a and 205d of the second converter circuit.

FIG. 33 is a control block diagram for generating the gate signal of the inverter circuit 203 when the control circuit 25 operates in the reverse direction of the isolated converter circuit. When the first phase shift amount Trig_N_inv (2568) obtained in FIG. 31 is smaller than the carrier wave 2506 (V _car ), the comparator 2575 outputs High. Further, at this time, when the second phase shift amount Trig_P_inv (2570) is larger than the carrier wave 2506 (V _car ), the comparator 2576 outputs High. On the other hand, when the first phase shift amount Trig_N_inv (2568) is larger than the carrier wave 2506 (V _car ), the comparator 2575 outputs Low. At this time, if the second phase shift amount Trig_P_inv (2570) is smaller than the carrier wave 2506 (V _car ), the comparator 2576 outputs Low. An output value 2578 obtained by inputting the outputs of the two comparators (2575 and 2576) to the logical product circuit 2577 is output as the gate signal Gate_203bc_inv of the switching elements 203b and 203c of the inverter circuit. Further, the output value 2580 obtained by inputting the output value 2578 of the AND circuit 2577 to the negation circuit 2579 is output as the gate signal Gate_203ad_inv of the

switching elements

203a and 203d of the inverter circuit.

When the first converter circuit is controlled so that the AC input voltage v _ac follows the target sine wave voltage v _ac * calculated from the target effective voltage value V _{ac, rms} * during reverse operation. A control method of the converter circuit 1 will be described with reference to control block diagrams shown in FIGS. This control is used in the CV control mode of the fifth operation mode, the CV control mode of the sixth operation mode, and the CV control mode of the seventh operation mode.
FIG. 34 is a control block diagram for generating the duty ratio of the switching element of the first converter circuit when the control circuit 25 operates in the reverse direction of the first converter circuit. The control circuit 25 multiplies a predetermined target effective voltage value V _{ac, rms} * and a sine wave sin (ωt) having an amplitude value of √2 to obtain a target sine wave voltage v _ac * (2581) of the AC voltage. ) Is generated. Here, ω in the sine wave sin (ωt) is an angular frequency having a frequency component of the AC voltage. A subtractor 2582 calculates a voltage difference between the generated target sine wave voltage v _ac * of the AC voltage and the AC input voltage v _ac detected by the first voltage detector 26a. By inputting this calculated value to the proportional-plus-integral controller 2583, the duty ratio 2584 (Duty_201_inv) of the switching element of the first converter circuit is output. Although the description is given here using the proportional-plus-integral controller 2583, it goes without saying that a proportional controller or an integral controller may be used and the control method is not limited.

FIG. 35 is a control block diagram for generating a gate signal for driving the switching element of the first converter circuit when the control circuit 25 operates in the reverse direction of the first converter circuit. When the duty ratio 2584 of the switching element of the first converter circuit obtained in FIG. 34 is larger than the carrier wave 2506 (V _car ), the output 2586 (Sig — 201_inv) of the comparator 2585 becomes High. In contrast, when the duty ratio 2584 of the switching element of the first converter circuit is smaller than the carrier wave 2506 (V _car ), the output 2586 (Sig — 201_inv) of the comparator 2585 becomes Low.

FIG. 36 is a control block diagram for switching the gate signal of the switching element of the first converter circuit in accordance with the polarity of the AC input voltage _vac when the control circuit 25 operates in the reverse direction of the first converter circuit. When the AC input voltage _vac is positive, the comparator 2587 outputs High. At this time, the multiplexer (MUX) 2588 outputs Sig_201_inv (2586) as the gate signals Gate_201a_inv (2589) and Gate_201d_inv (2590) of the

switching elements

201a and 201d of the first converter circuit. The multiplexer (MUX) 2591 outputs a Low signal as the gate signals Gate_201b_inv (2592) and Gate_201c_inv (2593) of the switching

elements

201b and 201c of the first converter circuit. On the other hand, when the AC input voltage _vac is negative, the comparator 2587 outputs Low. At this time, the multiplexer (MUX) 2588 outputs the Low signal as the gate signals Gate_201a_inv (2589) and Gate_201d_inv (2590) of the

switching elements

201a and 201d of the first converter circuit. The multiplexer (MUX) 2593 outputs Sig_201_inv (2586) as the gate signals Gate_201b_inv (2592) and Gate_201c_inv (2593) of the switching

elements

201b and 201c of the first converter circuit.

Control of the second power conversion circuit 22 when the second power conversion circuit 22 is controlled so that the DC voltage V _int of the integration DC capacitor follows the target DC voltage V _int * during reverse operation. The method will be described with reference to control block diagrams shown in FIGS. This control is used in the CV control mode of the sixth operation mode, the CV control mode of the seventh operation mode, and the CV control mode of the eighth operation mode.
FIG. 37 is a control block diagram for generating the duty ratio of the switching element of the second power conversion circuit 22 in the control circuit 25 when the second power conversion circuit 22 operates in the reverse direction. The control circuit 25 subtracts a voltage difference between a predetermined target DC voltage V _int * of the integration DC capacitor and a DC voltage V _int of the integration DC capacitor detected by the third voltage detector 26c. Calculated by By inputting this calculated value to the proportional-plus-integral controller 2595, the duty ratio 2596 (Duty_220_inv) of the switching element of the second power conversion circuit 22 is obtained. Although the description is given here using the proportional-plus-integral controller 2595, it is needless to say that a proportional controller or an integral controller may be used and the control method is not limited.

FIG. 38 is a control block diagram for generating the gate signal of the switching element of the second power conversion circuit 22 in the control circuit 25 when the second power conversion circuit 22 operates in the reverse direction. When the duty ratio 2596 (Duty_220_inv) of the switching element of the second power conversion circuit 22 obtained in FIG. 37 is smaller than the carrier wave 2506 (V _car ), the output value 2598 of the comparator 2597 becomes High. At this time, the output value 25100 of the comparator 2599 is Low. On the other hand, when the duty ratio 2596 (Duty_220_inv) is larger than the carrier wave 2506 (V _car ), the output value 2598 of the comparator 2597 is Low. At this time, the output value 25100 of the comparator 2599 becomes High. The output value 2598 of the comparator 2597 is output as the gate signal Gate_220a_inv of the switching element 220a of the second power conversion circuit. Further, the output value 25100 of the comparator 2599 is output as the gate signal Gate_220b_inv of the switching element 220b of the second power conversion circuit.
The above is the control method of each circuit.

The power conversion device according to the first embodiment has the above-described configuration, and the output unit on the contact power feeding method side and the output unit on the non-contact power feeding method side are integrated via a DC capacitor for integration. Even when the AC power supply voltage is high, the DC voltage of the DC capacitor for integration is controlled by the isolated converter circuit or the second power conversion circuit 22, so that even if the power reception voltage on the non-contact power supply side is low Thus, it is possible to supply power at the same time without stopping any of the power supply functions.

Embodiment 2. FIG.
A power conversion apparatus according to Embodiment 2 of the present invention will be described. The power conversion device according to Embodiment 2 of the present invention differs from the power conversion device shown in Embodiment 1 in the control method in some operation modes. Here, a different part from Embodiment 1 is demonstrated. The circuit configuration of the power conversion device according to the second embodiment of the present invention is the same as that of the power conversion device shown in FIG. Further, the power conversion device according to the present embodiment is classified into eight operation modes as shown in FIG. 4 by combining the operation patterns of the respective power conversion circuits as constituent elements, as in the first embodiment. be able to. Since the operation mode switching method is the same as that in the first embodiment, the description of the switching method is omitted.

In the power conversion device shown in the first embodiment, the direct current obtained from the second voltage detector 26b during the CC control mode operation in the first operation mode and the second operation mode and during the CV control mode operation in the fourth operation mode. The output is calculated so that the DC voltage V _link of the link capacitor follows the target DC voltage V _link *, and on / off control of the switching elements 201a to 201d of the first converter circuit 201 is performed based on this output value. .

On the other hand, in the present embodiment, the DC link capacitor obtained from the second voltage detector 26b during the CC control mode of the first operation mode and the second operation mode and during the CV control mode operation of the fourth operation mode. The target sine wave current i _ac * of the AC input is generated from the calculated value calculated so that the DC voltage V _link of the current follows the target DC voltage V _link *. Further, the output is calculated so that the AC input current i _ac obtained from the first current detector 27a follows the generated target sine wave current i _ac *. On / off control of the switching elements 201a to 201d of the first converter circuit 201 is performed based on this output value. The details will be described below.

The control method in the CC operation mode of the first operation mode and the second operation mode and the CV control mode of the fourth operation mode in the present embodiment will be described using control blocks.

First, a control method for the CC control mode in the first operation mode will be described.
As described above, the power converter according to the present embodiment differs from the power converter shown in Embodiment 1 in the control method of the first converter circuit. FIG. 39 is a control block diagram for generating the duty ratio of the switching element of the first converter circuit in the control circuit 25. In the control circuit 25, a subtractor 25101 calculates a voltage difference between a predetermined target DC voltage V _link * of the DC link capacitor and a DC voltage V _link of the DC link capacitor detected by the second voltage detector 26b. To do. By inputting this calculated value to the proportional-plus-integral controller 25102, the target effective value I _{ac, rms} * (25103) of the AC input current is obtained. Further, by dividing the AC input voltage v _ac obtained from the first voltage detector 26a by the effective value of the AC input voltage, a sine wave (25104) having an amplitude value √2 synchronized with the phase of the AC input voltage v _ac. ) Is obtained. Incidentally, the method of generating the sine wave (25,104) in synchronization with the phase of the AC input voltage v _ac is not limited thereto. By multiplying these two calculated values (25103, 25104), the target sine wave current i _ac * (25105) of the AC input current is obtained. A subtractor 25106 calculates a current difference between the absolute value of the target sine wave current i _ac * (25105) and the absolute value of the AC input current i _ac detected by the first current detector 27a. The calculated value is input to the proportional controller 25107, and the obtained output value is divided by the DC voltage V _link of the DC link capacitor. The adder 25108 adds the feedforward term 2503 of Equation 1 above to this division value, thereby outputting the duty ratio 25109 (Duty '— 201) of the switching element of the first converter circuit. Needless to say, a proportional controller or integral controller may be used instead of the proportional-integral controller 25102, and an integral controller or proportional-integral controller may be used instead of the proportional controller 25107.

FIG. 40 is a control block diagram in which the control circuit 25 generates a gate signal for driving the switching element of the first converter circuit. When the duty ratio 25109 of the switching element of the first converter circuit obtained in FIG. 39 is smaller than the carrier wave 2506 (V _car ), the output 25111 (Sig′_201a) of the comparator 25110 becomes High, and the comparator 25112 The output 25113 (Sig′_201b) becomes Low. In contrast, when the duty ratio 25109 of the switching element of the first converter circuit is larger than the carrier wave 2506 (V _car ), the output 25111 (Sig ′ — 201a) of the comparator 25110 becomes Low and the output 25113 of the comparator 25112 (Sig ′ — 201b) becomes High.

FIG. 41 is a control block diagram for switching the gate signal of the switching element of the first converter circuit in the control circuit 25 in accordance with the polarity of the AC input voltage. If the AC input voltage _{v ac} is positive polarity, the comparator 25114 outputs High. At this time, the multiplexer (MUX) 25115 outputs Sig′_201b (25113) as the gate signal Gate_201a (2513) of the switching element 201a of the first converter circuit. Also, the multiplexer (MUX) 25116 outputs Sig′_201a (25111) as the gate signal Gate_201b (2515) of the switching element 201b of the first converter circuit. The multiplexer (MUX) 25117 outputs Low as the gate signal Gate_201c (2517) of the switching element 201c of the first converter circuit. Further, the multiplexer (MUX) 25118 outputs High as the gate signal Gate_201d (2519) of the switching element 201d of the first converter circuit.

In contrast, when the AC input voltage _{v ac} is negative, the comparator 25114 outputs Low. At this time, the multiplexer (MUX) 25115 outputs Sig′_201a (25111) as the gate signal Gate_201a (2513) of the switching element 201a of the first converter circuit. Further, the multiplexer (MUX) 25116 outputs Sig′_201b (25113) as the gate signal Gate_201b (2515) of the switching element 201b of the first converter circuit. Further, the multiplexer (MUX) 25117 outputs High as the gate signal Gate_201c (2517) of the switching element 201c of the first converter circuit. The multiplexer (MUX) 25118 outputs Low as the gate signal Gate_201d (2519) of the switching element 201d of the first converter circuit. Thereby, compared with the case of Embodiment 1, it becomes possible to further improve the power factor of alternating current input, a harmonic is also suppressed, and noise reduction is attained.

Since the method for generating the gate signal of each switching element of the inverter circuit 203, the second converter circuit 205, the third converter circuit 230, and the second power conversion circuit 22 is the same as that in the first embodiment, a description thereof will be omitted. .
The above is the control method in the CC control mode in the first operation mode according to the present embodiment.

Also, the CC control mode in the second operation mode and the CV control mode in the fourth operation mode are the same as the CC control mode in the first operation mode of the present embodiment, and a description thereof will be omitted.

In the first embodiment, in the CP control mode of the first operation mode and the CP control mode of the third operation mode, the second power conversion circuit 22 receives the fixed duty ratio or the fourth voltage detector 26d. generated output value to the DC output voltage V _out resulting follow the target output voltage V _{out *,} or the target DC voltage a DC voltage V _int integrated DC capacitor obtained from the third voltage detector 26c The on / off control of the

switching elements

220a and 220b is performed based on any one of the output values generated so as to follow V _int *.

On the other hand, in the CP control mode of the first operation mode and the CP control mode of the third operation mode in the present embodiment, the second power conversion circuit 22 receives the fixed duty ratio or the fourth voltage detector 26d. A target output current I _out * of the DC output current is generated from a calculated value calculated so that the obtained DC output voltage V _out follows the target output voltage V _out *, and obtained from the second current detector 27b. The output value generated so that the DC output current I _out follows the target output current I _out * or the DC voltage V _int of the DC capacitor for integration obtained from the third voltage detector 26c is the target DC voltage V _int. from computed calculated value so as to follow the *, to generate a target output current I _{out *,} DC output current I _ou obtained from the second current detector 27b The output values generated so as to follow the I _{out *,} based on one of two values, either, performs on-off control of the switching element 220a and a switching element 220b.

A control method for the CP control mode in the first operation mode in the present embodiment will be described. The method for generating gate signals of the switching elements of the first converter circuit 201, the inverter circuit 203, the second converter circuit 205, and the third converter circuit 230 is the same as that in Embodiment 1, and therefore will be omitted.

A method for controlling the second power conversion circuit 22 will be described. When the third power conversion circuit 23 performs on / off control of the switching elements 230a to 230d so that the DC voltage V _int of the integration DC capacitor follows the target DC voltage V _int *, the second power conversion circuit 22 The switching element switches at a fixed duty ratio. The method for generating the gate signal at this time is also the same as that in the first embodiment, and thus description thereof is omitted.

On the other hand, when controlling the voltage of the load 4, the control circuit 25 generates the duty ratio of the switching element of the second power conversion circuit 22 using the control block diagram of FIG. In the control circuit 25, a subtractor 25119 calculates a voltage difference between a predetermined target output voltage V _out * of the load 4 and the DC output voltage V _out of the load 4 detected by the fourth voltage detector 26d. . By inputting this calculated value to the proportional-plus-integral controller 25120, the target output current I _out * (25121) is obtained. Further, a subtractor 25122 calculates a current difference between the obtained target output current I _out * (25121) and the DC output current I _out detected by the second current detector 27b. By inputting this calculated value to the proportional controller 25123, the duty ratio 25124 (Duty'_220) of the switching element of the second power conversion circuit 22 is output. Needless to say, a proportional controller or an integral controller may be used instead of the proportional-plus-integral controller 25120, and an integral controller or a proportional-integral controller may be used instead of the proportional controller 25123.

When the switching element of the third power conversion circuit 23 is switched at a fixed duty ratio, the control circuit 25 uses the control block diagram of FIG. 43 to determine the duty ratio of the switching element of the second power conversion circuit 22. Is generated. The control circuit 25 subtracts a voltage difference between a predetermined target DC voltage V _int * of the integration DC capacitor and a DC voltage V _int of the integration DC capacitor detected by the third voltage detector 26c. Calculated by By inputting this calculated value to the proportional-plus-integral controller 25126, the target output current I _out * (25127) is obtained. Further, a subtractor 25128 calculates a current difference between the obtained target output current I _out * (25127) and the DC output current I _out detected by the second current detector 27b. By inputting this calculated value to the proportional controller 25129, the duty ratio 25124 (Duty'_220) of the switching element of the second power conversion circuit 22 is output. Needless to say, a proportional controller or integral controller may be used instead of the proportional-integral controller 25126, and an integral controller or proportional-integral controller may be used instead of the proportional controller 25129.

FIG. 44 is a control block diagram for generating the gate signal of the switching element of the second power conversion circuit 22 in the control circuit 25. When the duty ratio 25124 (Duty'_220) of the switching element of the second power conversion circuit 22 obtained in FIG. 42 or FIG. 43 is smaller than the carrier wave 2506 (V _car ), the output value 2544 of the comparator 25130 is High. At this time, the output value 2546 of the comparator 25131 becomes Low. On the other hand, when the duty ratio 25124 (Duty '— 220) is larger than the carrier wave 2506 (V _car ), the output value 2544 of the comparator 25130 is Low. At this time, the output value 2546 of the comparator 25131 becomes High. The output value 2544 of the comparator 25130 is output as the gate signal Gate_220a of the switching element 220a of the second power conversion circuit. Further, the output value 2546 of the comparator 25131 is output as the gate signal Gate_220b of the switching element 220b of the second power conversion circuit. This makes it possible to output a stable DC output current I _out to the load side as compared with the case of the first embodiment.
The above is the control method in the CP control mode of the first operation mode according to the present embodiment. Further, the control method of the second power conversion circuit 22 in the CP control mode of the third operation mode according to the present embodiment is the same as the control method in the CP control mode of the first operation mode, and the description thereof is omitted.

In the first embodiment, in the CP control mode of the second operation mode, the second power conversion circuit 22 uses the DC voltage V _int of the integration DC capacitor obtained from the third voltage detector 26c as the target DC voltage. On / off control of the

switching elements

220a and 220b is performed based on an output value generated so as to follow V _int *.

In contrast, in the CP control mode of the second operation mode in the present embodiment, the second power conversion circuit 22 uses the DC voltage V _int of the integration DC capacitor obtained from the third voltage detector 26c as the target DC. A target output current I _out * is generated from the calculated value calculated to follow the voltage V _int *, and the DC output current I _out obtained from the second current detector 27b follows the target output current I _out *. On / off control of the

switching elements

220a and 220b is performed based on the output value generated as described above.

A control method for the CP control mode in the second operation mode in the present embodiment will be described. In this mode, the method for generating the gate signals of the switching elements of the first converter circuit 201, the inverter circuit 203, and the second converter circuit 205 is the same as that in the first embodiment, and thus will be omitted.

Next, a method for controlling the second power conversion circuit 22 will be described. 42, a predetermined target DC voltage V _int * of the integration DC capacitor and a DC voltage V _int of the integration DC capacitor detected by the third voltage detector 26c are determined. From the relationship, as described above, the target output current I _out * (25127) is obtained. Furthermore, from the relationship between the obtained target output current I _out * (25127) and the DC output current I _out detected by the second current detector 27b, as described above, the switching of the second power conversion circuit 22 is performed. An element duty ratio 25124 (Duty'_220) is generated. Also, the duty ratio 25124 (Duty'_220) obtained in FIG. 42 and the carrier wave 2506 (Vcar) are compared using the control block diagram of FIG. Thereby, as described above, the gate signals Gate_220a (2544) and Gate_220b (2546) for driving the switching elements of the second power conversion circuit 220 are generated. This makes it possible to output a stable DC output current I _out to the load side as compared with the case of the first embodiment.
The above is the control method in the CP control mode in the second operation mode according to the present embodiment.

Here, the CC control mode in the third operation mode, the CP control mode in the fourth operation mode, and the CV control mode control methods in the fifth to eighth operation modes are the same as in the first embodiment. Description is omitted.
The above is the description of the operation mode of the power conversion device according to the second embodiment. Note that the operation modes described in the first embodiment and the operation modes described in the second embodiment may be combined as appropriate.

Since the power conversion device according to the second embodiment of the present invention has the above-described configuration and operation, similarly to the power conversion device according to the first embodiment, the power reception device on the non-contact power feeding method side is low. Even if it exists, it becomes possible to supply electric power simultaneously without stopping any one of the electric power supply functions. Further, during the CC control mode operation in the first operation mode and the second operation mode, and in the CV control mode operation in the fourth operation mode, the DC voltage V _link of the DC link capacitor obtained from the second voltage detector 26b is targeted. An AC input target sine wave current i _ac * is generated from a calculated value calculated to follow the DC voltage V _link *, and an AC input current i _ac obtained from the first current detector 27a is generated. Since the first converter circuit 201 is controlled so as to follow the target sine wave current i _ac *, the power factor of the AC input can be further improved as compared with the first embodiment. The harmonics are also suppressed, and noise can be reduced.

Further, in the CP operation mode operation in the first operation mode, the second operation mode, and the third operation mode, the second power conversion circuit 22 has a fixed duty ratio or an integration obtained from the third voltage detector 26c. The target output current I _out * is generated from the calculated value calculated so that the DC voltage V _int of the DC capacitor follows the target DC voltage V _int *, and the DC output current obtained from the second current detector 27b generated output value so as to follow the I _out to the target output current _{I out} *, based on the value of one of, performs on-off control of the

switching elements

220a and 220b. This makes it possible to output a stable DC output current _Iout to the load side.

DESCRIPTION OF SYMBOLS 1 AC power supply, 2 Power converter device, 3 Contactless power transmission / reception circuit, 4 Load, 20 1st power converter circuit, 21 DC capacitor for integration, 22 2nd power converter circuit, 23 3rd power converter circuit, 24 DC bus for integration, 25 control circuit, 201 first converter circuit, 201a to 201d switching element, 201e to 201f AC reactor, 202 DC link capacitor, 203 inverter circuit, 203a to 203d switching element, 204 insulation transformer, 205 second Converter circuit, 205a to 205d switching element, 205e first DC capacitor, 220a to 220b switching element, 220c DC reactor, 220d DC output capacitor, 230 third converter circuit, 230a to 230d switching element, 231 non-contact Transmitting and receiving coil, 232 the second DC capacitor, 300a ~ 300d switching element, 300e DC link capacitors, 300f ~ 300i switching elements, 300j ~ 300k AC reactor, 301 non-contact transmitting and receiving _{coils, v ac} ac input _{voltage, v ac} * target sinusoidal _{voltage, V ac, rms} * target effective voltage _{value, V link} the DC voltage of the DC link _{capacitor, V link} * target DC voltage of the DC link _{capacitor, V int} DC voltage integrated DC _{capacitor, V int} * integration DC capacitor target DC voltage, _Vout DC output voltage, _Vout * target output voltage, _iac AC input current, _iac * target sine wave current, _Iout DC output current, _Iout * target output current

Claims

A first converter circuit having one end connected to an AC power source and converting an input voltage from the AC power source into a DC voltage; an inverter circuit converting a DC voltage converted by the first converter circuit into an AC voltage; 1 converter circuit and a DC link capacitor connected to the inverter circuit, an insulation transformer that insulates a voltage input from the inverter circuit and supplies power to the secondary side, and an AC voltage input from the insulation transformer to a DC voltage A first power conversion circuit having a second converter circuit that converts and outputs from the other end;
A second power conversion circuit, one end of which is connected to a load and controls a DC output voltage or a DC output current supplied to the load;
A non-contact power transmission / reception coil that magnetically couples with a non-contact power transmission / reception circuit, and a third converter circuit that converts an AC voltage received by the non-contact power transmission / reception coil into a DC voltage. A third power conversion circuit comprising:
An integration DC capacitor in which one end is connected to the positive electrode side of the integration DC bus, and the other end is connected to the negative electrode side of the integration DC bus;
A control circuit for controlling the first to third power conversion circuits,
The other end of the first power conversion circuit and the other end of the second power conversion circuit are connected to the integration DC bus, and the third power conversion circuit is connected to the integration DC bus. about,
The power converter characterized by this.
A first voltage detector for detecting an AC input voltage input to the first power conversion circuit;
A fourth voltage detector for detecting a DC output voltage supplied from the second power conversion circuit to the load;
A second current detector for detecting a DC output current supplied to the load from the second power conversion circuit;
With
The control circuit includes: a detection result from the first voltage detector; a detection result from the fourth voltage detector; a detection result from the second current detector; Selecting a power conversion circuit to be operated from among the first to third power conversion circuits based on a control signal for non-contact power supply indicating whether or not power can be supplied to the three power conversion circuits by a non-contact power supply method ,
The power conversion device according to claim 1.
The control circuit includes:
The first to third power conversion circuits can be controlled in a plurality of operation modes,
The first power conversion circuit, the second power conversion circuit, and the third power conversion circuit are operated simultaneously, and the input power of the first power conversion circuit and the non-contact power transmission / reception circuit A first operation mode in which the total input power of the third power conversion circuit received from the third power conversion circuit is supplied to the load via the second power conversion circuit;
The power converter according to claim 2 characterized by things.
The control circuit includes:
The first to third power conversion circuits can be controlled in a plurality of operation modes,
The first power conversion circuit and the second power conversion circuit are operated simultaneously, and the input power of the first power conversion circuit is supplied to the load via the second power conversion circuit. Having a second mode of operation;
The power converter according to claim 2, wherein:
The control circuit includes:
The first to third power conversion circuits can be controlled in a plurality of operation modes,
The second power conversion circuit and the third power conversion circuit are operated simultaneously, and the input power of the third power conversion circuit received from the non-contact power transmission / reception circuit is converted into the second power conversion. Having a third operating mode for supplying to the load via a circuit;
The power conversion device according to any one of claims 2 to 4, wherein:
The control circuit includes:
The first to third power conversion circuits can be controlled in a plurality of operation modes,
The first power conversion circuit and the third power conversion circuit are operated simultaneously, and the input power of the first power conversion circuit is transmitted to the contactless power transmission / reception via the third power conversion circuit. Having a fourth operating mode to supply to the circuit;
The power conversion device according to any one of claims 2 to 5, wherein:
The control circuit includes:
The first to third power conversion circuits can be controlled in a plurality of operation modes,
The first power conversion circuit and the third power conversion circuit are operated simultaneously, and the input power of the third power conversion circuit is supplied to the AC power supply via the first power conversion circuit. Having a fifth mode of operation;
The power conversion device according to any one of claims 2 to 6, wherein:
The control circuit includes:
The first to third power conversion circuits can be controlled in a plurality of operation modes,
The first power conversion circuit, the second power conversion circuit, and the third power conversion circuit are operated simultaneously, and the power supplied from the load is passed through the first power conversion circuit. Having a sixth operation mode for supplying to the non-contact power transmission / reception circuit via the AC power source and the third power conversion circuit,
The power conversion device according to any one of claims 2 to 7, wherein:
The control circuit includes:
The first to third power conversion circuits can be controlled in a plurality of operation modes,
A seventh power supply circuit that operates the first power conversion circuit and the second power conversion circuit simultaneously, and supplies power supplied from the load to the AC power supply through the first power conversion circuit. Having an operating mode,
The power conversion device according to any one of claims 2 to 8, wherein:
The control circuit includes:
The first to third power conversion circuits can be controlled in a plurality of operation modes,
The second power conversion circuit and the third power conversion circuit are operated simultaneously, and the power supplied from the load is passed through the second power conversion circuit and the third power conversion circuit. Having an eighth operation mode for supplying to the non-contact power transmission and reception circuit;
The power conversion device according to any one of claims 2 to 9, wherein:
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
A first current detector for detecting an AC input current input to the first power conversion circuit,
The control circuit includes:
In the first operation mode,
Based on the detection result by the first current detector, the switching element of the first converter circuit is controlled so that the AC input current follows a target sine wave current,
Based on the detection result by the second voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result of the third voltage detector, the switching element of the second power conversion circuit and the switching of the third power conversion circuit so that the DC voltage of the integration DC capacitor follows the target DC voltage. Controlling at least one of the elements,
The power conversion device according to claim 3.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the first operation mode,
Based on the detection result by the second voltage detector, the switching element of the first converter circuit is controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit, so that the DC voltage of the DC capacitor for integration follows a target DC voltage, Controlling at least one of the switching elements of the third power conversion circuit;
Based on the detection result by the second current detector, the switching element of the second power conversion circuit is controlled so that the DC output current follows the target output current,
Supplying power to the load;
The power conversion device according to claim 3.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
A first current detector for detecting an AC input current input to the first power conversion circuit,
In the second operation mode,
Based on the detection result by the first current detector, the switching element of the first converter circuit is controlled so that the AC input current input to the first power conversion circuit follows the target sine wave current,
Based on the detection result by the second voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the switching element of the second power conversion circuit is controlled so that the DC voltage of the integration DC capacitor follows the target DC voltage,
Supplying power to the load;
The power conversion device according to claim 4.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the second operation mode,
Based on the detection result by the second voltage detector, the switching element of the first converter circuit is controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the integration DC capacitor follows the target DC voltage,
Based on the detection result of the second current detector, the switching element of the second power conversion circuit is controlled so that the DC output current follows the target output current,
Supplying power to the load;
The power conversion device according to claim 4.
A third voltage detector for detecting a voltage of the integration DC capacitor;
The control circuit includes:
In the third operation mode,
Based on the detection value by the third voltage detector, the switching element of the third power conversion circuit and the second power conversion circuit so that the DC voltage of the integration DC capacitor follows the target DC voltage. Controlling at least one of the switching element,
Supplying power to the load;
The power conversion device according to claim 5.
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the third operation mode,
Based on the detection result by the third voltage detector, the switching element of the third power conversion circuit is controlled so that the DC voltage of the integration DC capacitor follows the target DC voltage,
Based on the detection result by the second current detector, the switching element of the second power conversion circuit is controlled so that the DC output current follows the target output current,
Supplying power to the load;
The power conversion device according to claim 5.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
A first current detector for detecting an AC input current input to the first power conversion circuit,
The control circuit includes:
In the fourth operation mode,
Based on the detection result by the first current detector, the switching element of the first converter circuit is controlled so that the AC input current input to the first power conversion circuit follows the target sine wave current,
Based on the detection result by the second voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the switching element of the third power conversion circuit is controlled so that the DC voltage of the integration DC capacitor follows the target DC voltage,
Supplying power to the contactless power transmission and reception circuit;
The power converter according to claim 6.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the fourth operation mode,
Based on the detection result by the second voltage detector, the switching element of the first converter circuit is controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the integration DC capacitor follows the target DC voltage,
The switching element of the third power conversion circuit is switched at a fixed value at least one of a duty ratio, a phase shift amount, and a switching frequency,
Supplying power to the contactless power transmission and reception circuit;
The power converter according to claim 6.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the fifth operation mode,
Based on the detection result by the first voltage detector, the switching element of the first converter circuit is controlled so that the AC input voltage input to the first power conversion circuit follows the target sine wave current,
Based on the detection result by the second voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the switching element of the third power conversion circuit is controlled so that the DC voltage of the integration DC capacitor follows the target DC voltage,
Supplying power to the AC power source;
The power converter according to claim 7 characterized by things.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the sixth operation mode,
Based on the detection result by the first voltage detector, the switching element of the first converter circuit is controlled so that the AC input voltage input to the first power conversion circuit follows the target sine wave voltage,
Based on the detection result by the second voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, at least one of the switching element of the third power conversion circuit and the switching element of the second power conversion circuit so as to follow the target DC voltage Control
Supplying power from a load to at least one of the AC power supply and the non-contact power transmission and reception circuit;
The power conversion device according to claim 8.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the seventh operation mode,
Based on the detection result by the first voltage detector, the switching element of the first converter circuit is controlled so that the AC input voltage input to the first power conversion circuit follows the target sine wave voltage,
Based on the detection result by the second voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the switching element of the second power conversion circuit is controlled to follow the target DC voltage,
Supplying power from the load to the AC power source;
The power converter according to claim 9.
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
In the eighth operation mode,
Based on the detection result by the third voltage detector, the switching element of the third power conversion circuit and the switching of the second power conversion circuit so that the voltage of the integration DC capacitor follows the target DC voltage. Controlling at least one of the elements,
Supplying power from the load to the contactless power transmission and reception circuit;
The power converter according to claim 10.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
A first current detector for detecting an AC input current input to the first power conversion circuit,
The control circuit includes:
In the first operation mode,
Based on the detection result by the first current detector, the switching element of the first converter circuit is controlled so that the AC input current follows a target sine wave current,
Based on the detection result by the second voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the target output current of the DC output current is generated from the calculated value calculated so that the DC voltage of the DC capacitor for integration follows the target DC voltage, The switching element of the second power conversion circuit is controlled so that the DC output current follows the generated target output current based on the detection result by the current detector of 2;
Supplying power to the load;
The power conversion device according to claim 3.
A first current detector for detecting an alternating current input to the first power conversion circuit;
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the first operation mode,
Based on a detection result by the second voltage detector, an AC input target sine wave current is generated from a calculated value calculated so that the DC voltage of the DC link capacitor follows the target DC voltage, and the first Based on the detection result by the current detector, the switching element of the first converter circuit is controlled so that the AC input current follows the generated target sine wave current,
Based on the detection result by the third voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit, so that the DC voltage of the DC capacitor for integration follows a target DC voltage, Controlling at least one of the switching elements of the third power conversion circuit;
Based on the detection result by the second current detector, the switching element of the second power conversion circuit is controlled so that the DC output current follows the target output current,
Supplying power to the load;
The power conversion device according to claim 3.
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
A first current detector for detecting an AC input current input to the first power conversion circuit,
In the second operation mode,
Based on the detection result by the first current detector, the switching element of the first converter circuit is controlled so that the AC input current input to the first power conversion circuit follows the target sine wave current,
Based on the detection result by the second voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the DC link capacitor follows the target DC voltage,
Based on the detection result by the third voltage detector, the target output current of the DC output current is generated from the calculated value calculated so that the DC voltage of the DC capacitor for integration follows the target DC voltage, The switching element of the second power conversion circuit is controlled so that the DC output current follows the generated target output current based on the detection result by the current detector of 2;
Supplying power to the load;
The power conversion device according to claim 4.
A first current detector for detecting an alternating current input to the first power conversion circuit;
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the second operation mode,
Based on a detection result by the second voltage detector, an AC input target sine wave current is generated from a calculated value calculated so that the DC voltage of the DC link capacitor follows the target DC voltage, and the first Based on the detection result by the current detector, the switching element of the first converter circuit is controlled so that the AC input current follows the generated target sine wave current,
Based on the detection result by the third voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the integration DC capacitor follows the target DC voltage,
Based on the detection result of the second current detector, the switching element of the second power conversion circuit is controlled so that the DC output current follows the target output current,
Supplying power to the load;
The power conversion device according to claim 4.
A third voltage detector for detecting a voltage of the integration DC capacitor;
The control circuit includes:
In the third operation mode,
Based on the detection result by the third voltage detector, the target output current of the DC output current is generated from the calculated value calculated so that the DC voltage of the DC capacitor for integration follows the target DC voltage, The switching element of the second power conversion circuit is controlled so that the DC output current follows the generated target output current based on the detection result by the current detector of 2;
Supplying power to the load;
The power conversion device according to claim 5.
A first current detector for detecting an alternating current input to the first power conversion circuit;
A second voltage detector for detecting a DC voltage of the DC link capacitor;
A third voltage detector for detecting a DC voltage of the integration DC capacitor;
The control circuit includes:
In the fourth operation mode,
Based on a detection result by the second voltage detector, an AC input target sine wave current is generated from a calculated value calculated so that the DC voltage of the DC link capacitor follows the target DC voltage, and the first Based on the detection result by the current detector, the switching element of the first converter circuit is controlled so that the AC input current follows the generated target sine wave current,
Based on the detection result by the third voltage detector, the switching element of the inverter circuit and the switching element of the second converter circuit are controlled so that the DC voltage of the integration DC capacitor follows the target DC voltage,
The switching element of the third power conversion circuit is switched at a fixed value at least one of a duty ratio, a phase shift amount, and a switching frequency,
Supplying power to the contactless power transmission and reception circuit;
The power converter according to claim 6.