JP6567228B1 - Power receiving device and vehicle power receiving device - Google Patents

Abstract

The power receiving device (vehicle power receiving device (1)) of the present application includes a contact power receiving unit (2) and a non-contact power receiving unit (35), and each of the contact power receiving unit (2) and the non-contact power receiving unit (35) When connected to the power supply facility (9), the control unit (7) includes the contact power receiving unit (2) including the case where each of the contact power receiving unit (2) and the non-contact power receiving unit (35) outputs less than the rated output. ) And the non-contact power receiving unit (35) are configured to adjust the output ratio based on the information on the power conversion loss for each operating condition with different output ratios.

Description

  The present application relates to a power receiving device and a vehicle power receiving device.

  In recent years, due to its convenience, a power feeding device using a power feeding method (non-contact power feeding method) between members spaced using magnetic resonance, electromagnetic induction, or the like has been developed. Application to the charging of power storage devices is being studied. On the other hand, a power supply facility has been proposed that can switch between the power supply by the non-contact power supply method and the power supply by the contact power supply method according to the vehicle so that power can be supplied to a vehicle that supports only the conventional contact power supply method. .

  On the other hand, there is a desire to simultaneously perform power feeding by a non-contact power feeding method and power feeding by a contact power feeding method for a vehicle corresponding to both types, and a power receiving device that operates both types simultaneously (for example, see Patent Document 1). .) Has been proposed. In this power receiving apparatus, a technique has also been proposed in which power is received by limiting the amount of power received by an inefficient system among the both systems.

Republished patent WO2013 / 114522 (paragraphs 0060-0073, FIGS. 2-4, paragraphs 0132-0133, FIG. 18)

  However, although the efficiency is improved by limiting the amount of power received by the inefficient method, it is not clear under which conditions the efficiency is compared. Furthermore, the person working at the rated output is not necessarily in a situation where the efficiency is high in the system. In other words, power is not always received under optimum conditions.

  The present application discloses a technique for solving the above-described problems, and an object thereof is to obtain a power receiving device capable of receiving power with high efficiency.

The power receiving device disclosed in the present application is provided in a contact power receiving unit that is electrically connected to an AC power source of a power feeding facility via a conductor, converts AC power received from the conductor into DC power, and is output to the power feeding facility. From the non-contact power receiving unit that receives AC power in a non-contact manner, converts the received AC power into DC power and outputs the output, and the output from the contact power receiving unit and the non-contact power receiving unit and integrated output, a DC output integrating unit for outputting to a load device, said contact receiving portion, the non-contact power receiving unit, and a control section for controlling the operation of the DC output integrating unit, wherein the control unit When each of the contact power receiving unit and the non-contact power receiving unit is connected to the power supply facility, the output of the contact power receiving unit and the non-contact power receiving unit is maintained in a state where the output to the load device is kept constant. The ratio was changed and changed A combination of the power conversion loss and the value of the power conversion loss calculated from the detected value measured for each output ratio is obtained as power conversion loss information, and the output ratio at which the power conversion loss value indicates the minimum value, The contact power receiving unit and the non-contact power receiving unit are operated .

  According to the power receiving device disclosed in the present application, since the ratio of power received by contact power feeding and power received by non-contact power feeding is adjusted so that power conversion loss is reduced, highly efficient power receiving can be realized.

1 is a block diagram for explaining a configuration of a vehicle power receiving device according to a first exemplary embodiment; It is a block diagram for demonstrating a structure when the power receiving apparatus for vehicles concerning Embodiment 1 is connected to electric power feeding equipment. FIG. 3 is a circuit diagram for explaining a configuration of each part that performs power conversion of the vehicle power receiving device according to the first exemplary embodiment; It is a circuit diagram for demonstrating the structure for every site | part which performs power conversion, when the power receiving apparatus for vehicles concerning Embodiment 1 is connected to electric power feeding equipment. It is a circuit diagram for demonstrating the measuring object for every site | part which performs electric power conversion, when the power receiving apparatus for vehicles concerning Embodiment 1 is connected to electric power feeding equipment. In the vehicle power receiving device according to the first exemplary embodiment, a graph showing the relationship between the power conversion loss and the charging power together with the output breakdown of the non-contact power feeding method and the contact power feeding method. 6 is a flowchart for explaining a control operation of the vehicle power receiving device according to the second exemplary embodiment; 6 is a graph showing the relationship between the power conversion loss and the charging power when the output ratio of the non-contact power feeding method and the contact power feeding method is changed in the control operation of the vehicle power receiving device according to the second embodiment. In the vehicle power receiving device according to the third exemplary embodiment, a graph showing the relationship between the power conversion loss and the charging power, together with the output breakdown of the contactless power feeding method and the contact power feeding method. It is a block diagram which shows the structure of the control part of the power receiving apparatus for vehicles concerning each embodiment.

Embodiment 1 FIG.
1 to 6 are diagrams for explaining the vehicle power receiving device according to the first embodiment. FIG. 1 is a block diagram in which the vehicle power receiving device is classified for each power conversion function. FIG. FIG. 3 is a block diagram categorized for each power conversion function for explaining the configuration when the contact power receiving unit and the non-contact power receiving unit of the vehicle power receiving device are respectively connected to the power feeding equipment. FIG. 4 is a circuit diagram for explaining the configuration of each part that performs power conversion related to power reception, and FIG. 4 performs power conversion when the contact power receiving unit and the non-contact power receiving unit of the vehicle power receiving apparatus are respectively connected to the power supply facility. It is a circuit diagram for demonstrating the structure for every site | part.

  FIG. 5 is a circuit diagram for explaining a measurement target for a configuration for each part that performs power conversion when the contact power receiving unit and the non-contact power receiving unit of the vehicle power receiving device are respectively connected to the power supply facility. FIG. 6 is a graph showing the power conversion loss with respect to the charging power based on the output breakdown of the contactless power feeding method and the contact power feeding method for each charging power. In the drawings and the following description, the same or similar components are indicated by the same reference numerals.

  Hereinafter, the vehicle power receiving device according to the first exemplary embodiment of the present application will be described with reference to the drawings. As shown in FIG. 1, the vehicle power receiving device 1 shown in the first embodiment includes a power storage device 6 to be charged and four power conversion function blocks for power reception. Specifically, in order to support two power feeding methods, as shown in FIG. 2, the contact power receiving unit 2 that receives AC power through a conductor connection with the AC terminal 91 t of the power feeding facility 9 and the power feeding facility 9 are non-contact. And a non-contact power receiving unit 35 that receives AC power from the power transmission unit 34 by non-contact power feeding. Then, an integration DC capacitor 4 for integrating the DC output from the contact power reception unit 2 and the DC output from the non-contact power reception unit 35, and the voltage of the integrated DC output to a voltage suitable for charging the power storage device 6 And a DC / DC converter 5 to be adjusted. Furthermore, the control part 7 which controls operation | movement of each block is provided.

  In this example, the integration DC capacitor 4 is connected between a DC bus connecting the output terminal of the contact power receiving unit 2, the output terminal of the non-contact power receiving unit 35, and the input terminal of the DC / DC converter 5. However, it is not limited to this. That is, the output terminal of the non-contact power receiving unit 35 is connected to the AC power supply 90 side from the connection point between the integration DC capacitor 4 and the DC bus, but the connection point between the integration DC capacitor 4 and the DC bus. Further, it may be connected to the power storage device 6 side.

  Further, as the AC power supply 90, a commercial AC system, a private power generator, and the like can be cited as application examples. The power storage device 6 may be a battery such as a high voltage battery for vehicle traveling, a lead battery for vehicle electrical components, a power storage device such as a capacitor, or any other type as long as it can store power. Applicable. On the other hand, although referred to as the power storage device 6, for example, a device that consumes electric power such as lighting or an electric device may be used. In this case, the vehicle power receiving device 1 is a device that receives power from the power supply facility 9 in order to “use” DC power instead of “charging”, and is “portable type” rather than “vehicle power receiving device”. The device is to be referred to as a “power converter” or simply a “power receiving device”.

Next, details of each block described above will be described.
<A: Contact power receiving unit>
As shown in FIG. 3, the contact power receiving unit 2 can be divided into three sub-blocks: an AC / DC converter 21, an insulating DC / DC converter 23 having an insulating transformer, and a DC capacitor 22. The AC / DC converter 21 is a PFC (Power Factor Correction) converter that controls an input AC current to a high power factor while converting an AC voltage into a DC voltage. Both ends of the DC capacitor 22 are connected between DC buses to which the AC / DC converter 21 and the insulated DC / DC converter 23 are connected.

<AC / DC converter>
The AC / DC converter 21 includes switching elements 2101 to 2104 and alternating current (for power factor improvement) reactors 2105 and 2106, and the switching elements 2101 to 2104 are connected in a full bridge configuration. One end of the AC reactor 2105 is a connection terminal 2 t with the AC terminal 91 t, and the other end is connected to a connection point between the switching element 2101 and the switching element 2102. One end of the AC reactor 2106 is a connection terminal 2t to the AC terminal 91t, and the other end is connected to a connection point between the switching element 2103 and the switching element 2104.

  In this example, the connection terminals 2t of the AC reactors 2105 and 2106 are used to connect different poles of the AC terminal 91t, respectively, but may be connected to only one pole side. That is, only one of AC reactors 2105 and 2106 may be used. The switching elements 2101 to 2104 are not limited to a general silicon IGBT (Insulated Gate Bipolar Transistor) or MOSFET (Metal Oxide Semiconductor Field Effect Transistor). For example, SiC (Silicon Carbide) -MOSFET, GaN (Gallium Nitride) -FET (Field Effect Transistor), or GaN-HEMT (High Electron Mobility Transistor) may be used. That is, the semiconductor material is not limited to conventional silicon, but may be a so-called wide bandgap semiconductor material or other materials, and the structure as a switching element is not necessarily limited.

  In this example, the switching elements are used for all the semiconductor elements, but it goes without saying that a semi-bridgeless type or a totem pole type structure using passive semiconductor elements such as diodes may be used.

<Insulated DC / DC converter>
The insulating DC / DC converter 23 includes an insulating transformer 2309 having two windings that are magnetically coupled to each other. The winding connected to the first end and the second end of the isolation transformer (left side in the figure) is called a primary side winding, and the winding connected to the third end and the fourth end (the right side) is secondary. It shall be called a side winding.

  The primary-side inverter circuit of the insulating transformer 2309 includes switching elements 2301 to 2304, and the switching elements 2301 to 2304 are configured by full bridges. Further, the DC side terminal of the primary inverter circuit, that is, the input terminal is connected to the AC / DC converter 21 and the DC capacitor 22 by the same DC bus. Further, a terminal on the AC side of the primary inverter circuit, that is, an output terminal is connected to the insulating transformer 2309. That is, the first end of the isolation transformer 2309 is connected to the connection point between the switching element 2301 and the switching element 2302 that are connected in series, and the first end of the isolation transformer 2309 is connected to the connection point between the switching element 2303 and the switching element 2304 that are connected in series. Two ends are connected.

  The secondary side converter circuit of the insulating transformer 2309 includes switching elements 2305 to 2308, and the switching elements 2305 to 2308 are configured by a full bridge. Further, the DC side terminal of the secondary converter circuit, that is, the output terminal is connected to the output terminal of the non-contact power receiving unit 35, the integration DC capacitor 4, and the DC bus same as the DC / DC converter 5. The terminal on the AC side of the secondary converter circuit, that is, the input terminal is connected to the insulating transformer 2309. That is, the third end of the isolation transformer 2309 is connected to the connection point between the switching element 2305 and the switching element 2306 connected in series, and the third end of the isolation transformer 2309 is connected to the connection point between the switching element 2307 and the switching element 2308 connected in series. 4 ends are connected.

  Here, by connecting a reactor or a capacitor in series or in parallel to the primary side or secondary side winding of the insulation transformer 2309 of the insulation type DC / DC converter 23, a low-loss soft switching operation is also possible. is there. At this time, the reactor may be externally attached, or the leakage inductance or excitation inductance of the insulating transformer 2309 may be used. Further, the switching elements 2301 to 2308 are not limited to IGBTs and MOSFETs made of silicon, but may be SiC-MOSFETs, GaN-FETs, or GaN-HEMTs made of wide band gap semiconductor elements. That is, the semiconductor material is not limited to conventional silicon, but may be a so-called wide bandgap semiconductor material or other materials, and the structure as a switching element is not necessarily limited. Furthermore, the secondary side converter circuit may be configured by a diode rectifier circuit using a diode, or may be configured by a voltage doubler rectifier circuit using a diode and a capacitor.

<B: Non-contact power feeding unit>
In the non-contact power feeding, a power transmission side circuit and a power receiving side circuit are separately formed by being divided into a power feeding facility 9 and a vehicle power receiving device 1, respectively. However, in order to facilitate explanation as power conversion, as shown in FIG. 4, the vehicle power receiving device 1 is connected to the power feeding facility 9, and the non-contact power receiving unit 35 of the vehicle power receiving device 1 and the power feeding facility 9 are not connected. The description will be made assuming that the non-contact power feeding unit 3 is formed together with the contact power transmission unit 34. The non-contact power supply unit 3 includes a non-contact power transmission unit 34 that transmits power in a non-contact manner and a non-contact power reception unit 35 that transmits and receives power in a non-contact manner.

  The non-contact power transmission unit 34 can be divided into three sub-blocks: an AC / DC converter 31, an inverter circuit 33 having a non-contact power transmission coil 3305, and a DC capacitor 32. The AC / DC converter 31 is a converter that controls an input AC current to a high power factor while converting an AC voltage into a DC voltage. Both ends of the DC capacitor 22 are connected between DC buses to which the AC / DC converter 31 and the inverter circuit 33 are connected.

  The non-contact power reception unit 35 is an AC / DC converter circuit having a non-contact power reception coil 3505. Here, when the non-contact power reception unit 35 is combined with the inverter circuit 33, it functions as an insulating DC / DC converter. Therefore, the combination of the inverter circuit 33 and the non-contact power receiving unit 35 is referred to as a non-contact power supply DC / DC converter.

<AC / DC converter>
The AC / DC converter 31 includes switching elements 3101 to 3104 and alternating current (for power factor improvement) reactors 3105 and 3106, and the switching elements 3101 to 3104 are connected in a full bridge configuration. One end of AC reactor 3105 is connected to AC power supply 90, and the other end is connected to a connection point between switching element 3101 and switching element 3102. One end of AC reactor 3106 is connected to AC power supply 90, and the other end is connected to a connection point between switching element 3103 and switching element 3104.

  In the AC / DC converter 31 in this example, the AC reactors 3105 and 3106 are connected to both polar sides of the AC power supply 90, respectively, but may be connected to only one pole side of the AC power supply 90. That is, only one of AC reactors 3105 and 3106 may be used. The switching elements 3101 to 3104 are not limited to a general silicon IGBT or MOSFET. For example, an element called a wide band gap semiconductor such as SiC-MOSFET, GaN-FET, or GaN-HEMT may be used.

  In the AC / DC converter 31 in this example, the switching elements are used for all semiconductor elements, but a semi-bridgeless type or a totem pole type structure using passive semiconductor elements such as diodes may also be used. Needless to say, it is good.

<DC / DC converter for non-contact power supply>
In the non-contact power supply DC / DC converter, a winding connected to the terminal of the non-contact power transmission coil 3305 is referred to as a primary side winding, and a winding connected to the terminal of the non-contact power receiving coil 3505 is a secondary side winding. Let's call it a line.

  The inverter circuit 33 that is a primary side inverter of the DC / DC converter for non-contact power feeding includes switching elements 3301 to 3304, and the switching elements 3301 to 3304 are configured by a full bridge. Further, the DC side terminal of the primary side inverter circuit 33, that is, the input terminal is connected to the AC / DC converter 31 for the non-contact power reception unit and the DC capacitor 32 through the same DC bus. Further, the AC side terminal of the primary side inverter circuit 33, that is, the output terminal is connected to the non-contact power transmission coil 3305. That is, the first end of the non-contact power transmission coil 3305 is connected to the connection point between the switching element 3301 and the switching element 3302 that are connected in series, and the non-contact power transmission is performed at the connection point between the switching element 3303 and the switching element 3304 that are connected in series. A second end of the coil 3305 is connected.

  The secondary circuit of the DC / DC converter for non-contact power feeding, that is, the non-contact power reception unit 35 includes switching elements 3501 to 3504, and the switching elements 3501 to 3504 are configured by a full bridge. Further, the DC side terminal of the secondary circuit, that is, the output terminal, is connected to the output terminal of the contact power receiving unit 2, the integration DC capacitor 4, and the DC bus same as the DC / DC converter 5. In addition, a terminal on the AC side of the secondary circuit, that is, an input terminal is connected to the non-contact power receiving coil 3505. That is, the first end of the non-contact power receiving coil 3505 is connected to the connection point between the switching element 3501 and the switching element 3502 that are connected in series, and the non-contact power reception is connected to the connection point between the switching element 3503 and the switching element 3504 that are connected in series. A second end of the coil 3505 is connected.

  Here, a low-loss soft switching operation is also possible by connecting a reactor or a capacitor in series or in parallel to the primary side or secondary side winding of the DC / DC converter for non-contact power feeding. At this time, the reactor may be externally attached, or the parasitic inductance of the non-contact power transmission / reception coil may be used. The switching elements 3301 to 3304 and 3501 to 3504 are not limited to general silicon IGBTs or MOSFETs. For example, SiC-MOSFET, GaN-FET, or GaN-HEMT may be used. That is, the semiconductor material is not limited to conventional silicon, but may be a so-called wide bandgap semiconductor material or other materials, and the structure as a switching element is not necessarily limited. Further, the non-contact power receiving unit 35 may be configured by a diode rectifier circuit using a diode or a voltage doubler rectifier circuit using a diode and a capacitor.

<C: DC output integration unit (DC / DC converter)>
The DC / DC converter 5 includes switching elements 501, 502, a direct current (smoothing) reactor 503, and a smoothing capacitor 504, which are connected in a step-down chopper configuration. In the DC / DC converter 5 in this example, a step-down chopper circuit system is used, but a step-up or step-up / step-down chopper configuration may be used. Needless to say, an interleaved configuration, a parallel connection configuration, or an insulated DC / DC converter using an insulating transformer may be used.

<D: Control unit>
Next, the control unit 7 that controls the operation of each part having the above-described power conversion function will be described in accordance with basic control during steady operation. In the vehicle power receiving device 1 according to the present embodiment, as shown in FIG. 5, the control unit is based on detection values from the voltage detector and the current detector (for example, the voltage detector 89v and the current detector 82a). 7 performs feedback calculation. The control unit 7 can control all the power conversion circuits in the vehicle power receiving device 1 such as the contact power reception unit 2, the non-contact power reception unit 35, the DC / DC converter 5, and the like. Take control. In other words, based on at least a part of the detection results obtained from the voltage detector and the current detector, a drive signal is transmitted to the necessary switching elements in the power conversion circuit, and the switching elements are turned on and off to control the desired state. Can be performed.

The control of the contact power receiving unit 2 during steady operation will be described. The control unit 7 controls the detected value of the AC input current (AC input current i _{ac_2} ) of the contact power receiving unit 2 detected by the current detector 82 a so that the value of the input power factor of the contact power receiving unit 2 becomes 1. Therefore, the duty ratio of each switching element is calculated. Specifically, a sinusoidal predetermined current command (target sine wave current) i _{ac — 2} s synchronized with the detected value of the AC input voltage (= AC output voltage V _ac ) detected by the voltage detector 89v, and AC A current difference from the input current i _{ac — 2} is calculated. Using the calculated current difference as a feedback amount, the output is calculated by proportional control or proportional integral control. Further, for the detected value of the DC voltage of the DC capacitor 22 (capacitor DC voltage V _{c_2} ) by a voltage detector (not shown), the voltage difference between a predetermined target DC voltage V _{c_2} s and the capacitor DC voltage V _{c_2} is calculated. To do. The output is calculated by proportional control or proportional integral control with the calculated voltage difference as a feedback amount.

Further, the detected value of the DC voltage of the integration DC capacitor 4 (DC voltage V _int ) detected by the voltage detector 84v is determined based on the predetermined target DC voltage V _ints and the DC voltage of the integration DC capacitor 4. The voltage difference from the detected value (DC voltage V _int ) is calculated. The output is calculated by proportional control or proportional integral control with the calculated voltage difference as a feedback amount.

Further, when controlling the DC output voltage V _out to the power storage device 6, a predetermined target DC output voltage V _out s and a detected value of the DC output voltage detected by the voltage detector 81 v (DC output voltage V _out ). The voltage difference is calculated. The output is calculated by proportional control or proportional integral control with the calculated voltage difference as a feedback amount.

Furthermore, when controlling the DC output current I _out to the power storage device 6, a predetermined target DC output current I _out s and a detected value of the DC output current detected by the current detector 81i (DC output current I _out ). And the current difference is calculated. Using the calculated current difference as a feedback amount, the output is calculated by proportional control or proportional integral control.

<Detector>
In the vehicle power receiving device 1 according to the first exemplary embodiment, for the contact power receiving unit 2, a current detector 82d for detecting the DC output current i _{o_2} and the (AC) input current i _{ac_2} are detected. Current detector 82a. For the non-contact power receiving unit 35, a current detector 83d for detecting the DC output current i _{o — 3} , a voltage detector _85v for detecting the AC terminal voltage V _{br — 3} as a full bridge converter, and an input current i A current detector 85a for detecting _wl is arranged. Further, for the unified DC capacitor 4 is provided with a voltage detector 84v for detecting a DC voltage V _int.

Further, the non-contact power transmission unit 34 on the power supply facility 9 side is provided with communication means (not shown) so as to receive the detection value from the current detector 83a that detects the (AC) input current _{iac_3} . In addition, since these voltage / current detectors are described including, for example, the detectors required in the second embodiment or the possibility of being required in other development examples, all the required detectors are described. I will refuse that. Examples of the communication means include Bluetooth (registered trademark), Wi-Fi (registered trademark), and the like when obtained in a non-contact manner, but it is needless to say that the communication means is not limited to these methods. Further, although communication wiring may be used separately, for example, communication may be performed from the power supply facility 9 via PLC (Power Line Communication) via the connection terminal 2t, or may be changed as appropriate.

  The vehicle power receiving device 1 according to the first exemplary embodiment can use three modes properly during power reception based on the above-described configuration. A contact power receiving mode for receiving power only through the contact power receiving unit 2, a non-contact power receiving mode for receiving power only through the non-contact power receiving unit 35, and a parallel receiving power through both the contact power receiving unit 2 and the non-contact power receiving unit 35 The power receiving mode.

<Parallel power reception mode>
The operation in the state where the vehicle power receiving device 1 according to the first embodiment can receive power in parallel, that is, the operation in the state where the connection shown in FIG. 2 or FIG. explain. Here, the rated power of the contact power receiving unit 2 and the non-contact power receiving unit 35 is defined as 3P, and the rated power of the DC / DC converter 5 is defined as 6P. That is, the rated power of the vehicle power receiving device 1 is defined as 6P. Needless to say, the rated power here is merely an example, and other rated power values may be used.

  Further, the total power conversion loss in the vehicle power receiving device 1 indicates the sum of the power conversion losses of the contact power receiving unit 2, the non-contact power receiving unit 35, and the DC / DC converter 5. That is, the power input to the contact power receiving unit 2 and the non-contact power receiving unit 35 is subtracted from the power output to the power storage device 6.

Then, when the output power of the contact power receiving unit 2 is expressed as the charging power P _con , it is calculated from the DC voltage V _int of the DC capacitor for integration 4 and the output current _{io_2} of the contact power receiving unit. When the output power of the non-contact power reception unit 35 is expressed as the charging power P _wpt , it is calculated from the DC voltage V _int of the integration DC capacitor 4 and the output current i _{o — 3} of the non-contact power reception unit 35. Further, when the output power of the DC / DC converter 5 is the total charging power P _t output to the power storage device 6, it is calculated from the DC output voltage V _out and the DC output current I _out to the power storage device 6.

When the charging operation is performed on the power storage device 6 with the rated power (6P) of the vehicle power receiving device 1, the contact power receiving unit 2 and the non-contact power receiving unit 35 operate with the rated power 3P. That is, the operation is performed in a state where the output ratio (P _con / P _wpt ) of the charging power P _con of the contact power receiving unit 2 to the charging power P _wpt of the non-contact power receiving unit 35 is 1. On the other hand, when the charging operation is performed on the power storage device 6 with less than the rated power 6P, the power receiving ratio (output ratio) is adjusted to operate.

  In the vehicle power receiving device 1 according to the first embodiment, as shown in Table 1, the output ratio is adjusted based on a predetermined power conversion loss table. Table 1 tabulates the power conversion loss according to the charging power of each of the contact power receiving unit 2, the non-contact power receiving unit 35, and the DC / DC converter 5. Here, the value of the table may be a value calculated from a theoretical formula, or may be a loss obtained by an experiment. Further, in Table 1, not the actual value but a standardized power conversion loss L is expressed for simplification of explanation. In addition, it cannot be overemphasized that the example of the power conversion loss shown in Table 1 is an example for description.

The control of the output ratio when the power conversion loss table as shown in Table 1 is used will be described. In consideration of power conversion loss, strictly speaking, the sum of the charging power P _wpt and the charging power P _con needs to be a value obtained by adding the power conversion loss in the DC / DC converter 5 to the total charging power P _t. is there. However, in order to explain the concept of output ratio adjustment using a table, in the following adjustment examples, it is assumed that P _wpt + P _{con ≈P t} and is described in a simplified manner. Further, in order to make the relationship with the table easier to understand, instead of the output ratio, the description will be made as “distribution” based on the charging power (P unit) of the charging power P _wpt and the charging power P _con .

For example, the total charging power _{P t} is the case of performing a charging operation with 5P, charge power _{P con} contact power receiving portion 2 is 3-Way, a charge power _{P wpt} contactless power receiving unit 35 is distributed so that the 2P. Then, as shown in Table 1, the power conversion loss of the contact power receiving unit 2 is 3L, the power conversion loss of the non-contact power receiving unit 35 is 2L, the power conversion loss of the DC / DC converter 5 is 2.5L, and the total power conversion loss Becomes 7.5L.

In contrast, it is _assumed that the charging power P _con is 2P and the charging power P _wpt is 3P. The power conversion loss of the DC / DC converter 5 does not change at 2.5L, but as shown in Table 1, the power conversion loss of the contact power receiving unit 2 changes to L, and the power conversion loss of the non-contact power receiving unit 35 changes to 3.5L. The total power conversion loss is 7L. That is, in the charging operation conditions the total charging power _{P t} becomes _5P, P _con: the _{P wpt} 2: As distribute 3 ratio may be controlled charging power from the power receiving unit.

Similarly, if the total charged electrical _{P t} performs a charging operation in 4P, distributes the charge power _{P con} contact power receiving portion 2 P, the charging power _{P wpt} contactless power receiving unit 35 such that the 3-Way. Then, as shown in Table 1, the power conversion loss of the contact power receiving unit 2 is 0.8 L, the power conversion loss of the non-contact power receiving unit 35 is 3.5 L, the power conversion loss of the DC / DC converter 5 is 2 L, and the power conversion loss The total is 6.3L. On the other hand, when the charging power P _con is _allocated to 3P and the charging power P _wpt is _allocated to P, the power conversion loss of the contact power receiving unit 2 is 3L, the power conversion loss of the non-contact power receiving unit 35 is 0.5L, and the DC / DC converter 5 The power conversion loss is 2L, and the total power conversion loss is 5.5L.

In contrast, the charging power P _con is distributed to 2P and the charging power P _wpt is distributed to 2P. The power conversion loss of the DC / DC converter 5 remains unchanged at 2L, but the power conversion loss of the contact power receiving unit 2 is L, the power conversion loss of the non-contact power receiving unit 35 is 2L, and the total power of the power conversion loss is 5L. . That is, in the charging operation conditions the total charging power _{P t} becomes _4P, P _con: the _{P wpt} 1: may control the charging power from the power receiving unit as allocating 1 ratio.

Similarly, if the total charged electrical P _t performs a charging operation in 3-Way, contact power receiving only, that is, performs a charging operation for charging power P _con contact power receiving portion 2 as 3-Way. Then, as shown in Table 1, the power conversion loss of the contact power receiving unit 2 is 3L, the power conversion loss of the DC / DC converter 5 is 1.5L, and the total power conversion loss is 4.5L. On the other hand, it is _assumed that the charging operation is performed with only non-contact power reception, that is, the charging power P _wpt of the non-contact power reception unit 35 is 3P. Then, the power conversion loss of the non-contact power receiving unit 35 is 3.5L, the power conversion loss of the DC / DC converter 5 is 1.5L, and the total power conversion loss is 5L.

Further, it is _assumed that charging power P _con is distributed to P and charging power P _wpt is distributed to 2P. Here, the power conversion loss of the DC / DC converter 5 is not changed at 1.5 L, but the power conversion loss of the contact power receiving unit 2 is 0.8 L, the power conversion loss of the non-contact power receiving unit 35 is 2 L, and the power conversion loss. The total is 4.3L. In contrast, it is _assumed that charging power P _con is distributed to 2P and charging power P _wpt is _allocated to P. Then, the power conversion loss of the contact power reception unit 2 is L, the power conversion loss of the non-contact power reception unit 35 is 0.5L, and the total power conversion loss is 3L. That is, in the charging operation conditions the total charging power _{P t} is _3-Way, P _con: the _{P wpt} 2: may control the charging power from the power receiving unit as allocating 1 ratio.

Similarly, if the total charged electrical _{P t} performs a charging operation in 2P, charging power _{P con} contact power receiving portion 2, the distribution P, and charging power _{P wpt} contactless power receiving unit 35 to the P. Then, as shown in Table 1, the power conversion loss of the contact power receiving unit 2 is 0.8 L, the power conversion loss of the non-contact power receiving unit 35 is 0.5 L, the power conversion loss of the DC / DC converter 5 is L, and the power conversion loss. The total of 2.3L. Further, when the charging operation is performed with only non-contact power reception, that is, the charging power P _wpt of the non-contact power reception unit 35 being 2P, the power conversion loss of the DC / DC converter 5 does not change with L, but the power of the non-contact power reception unit 35 The conversion loss is 2L, and the total power conversion loss is 3L.

On the other hand, when the charging operation is performed only with contact charging, that is, when the charging power P _con of the contact power receiving unit 2 is 2P, the power conversion loss of the contact power receiving unit 2 is L, and the total power conversion loss is 2L. That is, under the charging operation condition in which the total charging power _Pt is 2P, the charging operation may be controlled only by contact power reception without performing parallel power reception.

Further, when the charging operation is performed with the total charging power _Pt being P, that is, when the operation is performed with the minimum power, the operation may be controlled so as to operate only with non-contact power reception as shown in Table 1.

As described above, based on the data of the power conversion loss for each method, the power required for the charging operation is converted into the charging power P _con by the contact power receiving unit 2 and the charging power P _wpt by the non-contact power receiving unit 35 according to the total charging power Pt. Adjusted the distribution of. In that case, the case where each output was less than the rating was also considered. As a result, as shown in FIG. 6, power conversion in the vehicle power receiving device 1 as a whole is simpler than that in the case of simple even splitting or simply reducing the power on the inefficient side as in Patent Document 3. It becomes possible to operate while suppressing loss.

6, the horizontal axis represents the total charging power P _t, the vertical axis represents the power conversion loss. In addition, “◯” indicates that both contact power supply and non-contact power supply are used together. The numbers in “■” indicate the charging power allocated to contact power supply, and the numbers in “▲” indicate The charging power distributed to non-contact power feeding is shown respectively.

In addition, although the case where shared charge was performed up to 2P was explained here, based on the data of power conversion loss, when charging with one of the charging methods is less loss than performing shared charging, one method is used. All may be distributed, that is, switched to single-type power reception. In the first embodiment, a table classified into a total of six power conditions from P to 6P is used. Needless to say, the number of classifications is not limited to this, and power can be accurately generated using a more detailed table. Distribution may be performed. Further information, instead of the table, the total charging power P _t and contact power and output ratio of the non-contact power supply as a variable may be used a formula that power conversion loss can be derived, the solution according to the conditions can be obtained Can be obtained.

  As is well known, in non-contact power feeding, the power conversion loss may change remarkably due to the positional deviation between the power transmitting and receiving coils (for example, the non-contact power transmitting coil 3305 and the non-contact power receiving coil 3505). In the first embodiment, as an example, the power conversion loss with respect to the charging power is shown by a simple one-to-one relationship for each method as shown in Table 1, but the present invention is not limited to this. For example, a power distribution control may be performed using a more accurate table by adding a table in which the positional deviation of the power transmission / reception coil is a variable. Or you may make it use the evaluation value of deviation | shift as a variable as a numerical formula mentioned above. Here, the direction parallel to the coil surface of the power transmission / reception coil is the x direction and the y direction, and the direction perpendicular to the coil surface is the z direction. Then, as the positional deviation, the deviation in the direction (x direction and y direction) parallel to the coil surface and the inter-surface distance (z direction) between the power transmitting and receiving coils are comprehensively evaluated. At this time, the evaluation value is not limited to a continuous evaluation value, and the misalignment state may be classified into a plurality of classes, and the corresponding class may be used as the evaluation value. Alternatively, a table or formula may be prepared for each class, and a necessary one may be selected from a plurality of tables or formulas according to the class. In addition, you may consider including the inclination of the receiving coil with respect to a power transmission coil as a variable of the position shift of a power transmission / reception coil.

  Here, in general, for example, as described in Patent Document 1, it is considered that “the efficiency of contact charging does not change so much depending on the magnitude of charging power”. However, in order to further increase the efficiency, it is not always necessary to set one of the power feeding methods to the rated power. In particular, unlike a vehicle with a limited amount or size, a fixed facility such as the power supply facility 9 can easily form a highly efficient circuit, in which case half of the power conversion circuit is on the fixed side. There is a possibility that the arranged non-contact power feeding can perform power feeding with higher efficiency.

Therefore, as shown in the first embodiment, the charging power P _con and the non-contact power feeding are required for the total charging power P _t required, including the case where both the contact power feeding and the non-contact power feeding are less than the rating. A plurality of operating conditions (operating conditions) having different output ratios of the charging power P _wpt are set. Then, for each of a plurality of set operating conditions, power conversion loss is calculated based on the power conversion loss data for each part, and the output ratio of the operating conditions is calculated for the required total charging power P _t . Information on the corresponding power conversion loss is generated. Based on the information on the generated power conversion loss, the power can be received with higher efficiency by operating at the output ratio of the operation condition that minimizes the power conversion loss.

In this example, the charging power P _con of the contact power receiving unit 2 is treated as the output power of the contact power receiving unit 2, and the charging power P _wpt of the non-contact power receiving unit 35 is treated as the output power of the non-contact power receiving unit 35. It is not limited to. For example, the (alternating current) input power of the contact power receiving unit 2 may be treated as the charging power P _con and the input power of the non-contact power receiving unit 35 may be treated as the charging power P _wpt . At this time, the charging power P _con of the contact power receiving unit 2 can be calculated from the detected value of the voltage of the AC power supply 90 and the detected value of the input current of the contact power receiving unit 2 (V _ac and i _{ac_2} ). Further, the charging power P _wpt of the non-contact power receiving unit 35 can be calculated from the detected value of the voltage at the AC terminal of the full bridge converter constituting the non-contact power receiving unit 35 and the detected value of the output current (V _{br — 3} and i _wl ).

  In the present embodiment and each of the following embodiments, an example in which power is received from the power supply facility 9 will be described, but the present invention is not limited to this. For example, even when power stored in the power storage device 6 is transmitted to the power supply facility 9 side by adjusting the output ratio of the non-contact power supply and the contact power supply (in the reverse direction) at the time of a power failure or the like. Can transmit power. In that case, for example, the control unit 7 receives the operation switching command, and switches the control operation so that the contact power reception unit 2 and the non-contact power reception unit 35 function as a contact power transmission unit and a non-contact power transmission unit, respectively. It will have a function.

Embodiment 2. FIG.
In the first embodiment, the power conversion loss data is adjusted based on the pre-input data or the data measured in advance, and the output ratio between contact power supply and non-contact power supply according to the total charge power is adjusted. An example was described. In the second embodiment, the ratio is adjusted based on the measured value when the operation is performed with the total charging power fixed and the output ratio changed.

  FIGS. 7 and 8 are for explaining the vehicle power receiving apparatus according to the second embodiment. FIG. 7 is a flowchart for explaining the control operation for adjusting the output ratio, and FIG. 8 is for adjusting the output ratio. It is a graph which shows the relationship of the power conversion loss with respect to charging power when changing the ratio of a non-contact electric power feeding system and a contact electric power feeding system in the control operation to perform. Since the circuit configuration of the vehicle power receiving device according to the second embodiment is substantially the same as that of FIGS. 1 to 5 used in the description of the first embodiment, detailed description of the configuration will not be repeated.

Here, as in the first embodiment, the charging power P _con of the contact power receiving unit 2 according to the second embodiment represents the output power of the contact power receiving unit 2, and the detection of the DC voltage V _int of the integration DC capacitor 4 is performed. It is calculated from the value and the detected value of the output current _{io_2} of the contact power receiving unit 2. Further, the charging power P _wpt of the non-contact power receiving unit 35 represents the output power of the non-contact power receiving unit 35, the detected value of the DC voltage V _int of the integration DC capacitor 4 and the output current i _{o — 3} of the non-contact power receiving unit 35. It is calculated from the detected value.

The power input to the contact power receiving unit 2 is calculated from the AC output voltage V _ac applied to the connection terminal 2t detected by the voltage detector 89v described in FIG. 5 and the input current i _{ac_2} detected by the current detector 82a. To do. A difference between the charging power P _con and the calculated input power is defined as a power conversion loss in the contact power receiving unit 2. Note that the input AC power may be calculated by, for example, multiplying the input current i _{ac — 2} by a constant when the voltage and the power factor can be considered constant.

Further, for example, the power input to the non-contact power receiving unit 35 is calculated from the detected value of the AC terminal voltage V _{br — 3} of the full bridge converter and the detected value of the input current i _wl , and the difference between the charging power P _wpt is determined in a non-contact _manner. The power conversion loss in the power receiving unit 35 is assumed. That is, it can be calculated from the current (input current i _wl ) and voltage (AC terminal voltage V _{br — 3} ) flowing through the non-contact power receiving coil 3505 detected by the voltage detector 85v and the current detector 85a.

  Next, power conversion loss data is calculated from measured values during operation instead of a table. The control operation executed by the control unit 7 to change the output ratio during operation, that is, to change the operating condition and receive power at the output ratio at which the power conversion loss is minimized is shown in the flowchart of FIG. explain. It should be noted that the flowchart of FIG. 7 is an example, and the present invention is not limited to this.

As Figure 7, first, it determines whether a Step1, the total charging power _{P t} is less than 6P is the rated power. At this time, the total charge power _{P t} is the case of the 6P, ie If No, the process proceeds to Step2-B. In Step 2 -B, the output ratio (P _con / P _wpt ) of the contact power receiving unit 2 and the non-contact power receiving unit 35 is set to 1, and the operation is performed at the rated power 3P of each power receiving unit.

In contrast, the total charging power _{P t} is of less than 6P, that is, if Yes, the process proceeds to Step2-A. In Step 2-A, the set value (ratio set value Sr) of the output ratio (P _con / P _wpt ) of the contact power receiving unit 2 and the non-contact power receiving unit 35 is arbitrarily set from 1 according to the total charging power P _t The ratio set value is changed (increased) at arbitrary intervals up to the maximum ratio, the power conversion loss is calculated based on the measured value for each ratio set value Sr, and the calculation result is stored as power conversion loss information. When the setting of the ratio set value Sr up to the maximum ratio and the calculation and storage of the power conversion loss information for each ratio set value Sr are completed, the process proceeds to Step 3.

In step3, the ratio set value Sr from 1 to a minimum ratios arbitrarily set according to the total charged electrical P _t, make changes at any interval (decrease). Then, for each ratio setting value Sr, the power conversion loss is calculated based on the measured value, and the calculation result is added to the power conversion loss information stored in Step 2 and stored. When the setting of the ratio set value Sr up to the minimum ratio and the calculation and storage of the power conversion loss information for each ratio set value Sr are completed, the process proceeds to Step 4.

  In Step 4, the ratio setting value Sr that is the minimum power conversion loss is extracted from the stored power conversion loss information, and the operating point (operating condition) of each part is shifted so as to be the ratio setting value Sr. Thus, unlike Embodiment 1, it is possible to adjust the output distribution (output ratio) that dynamically suppresses the power conversion loss without creating a power conversion loss table in advance.

In step5, from the state of Step2-B, or Step4, whether the total charging power _{P t} is changed, it determines at any time interval. At this time, when the total charging power P _t does not change, that is, in the case of No, the power distribution ratio of Step 2 -B or Step 4 is maintained, and fluctuations in the total charging power P _t are periodically detected. On the other hand, if the total charged electrical P _t is changed, that is, when Yes, the process returns to Step1, according to the total charging power P _t after variation, controls the operation as described above.

The transition of the operating point of each part in such operation control will be described with reference to FIG. In FIG. 8, Case 1 indicates a power conversion loss when the output ratio (P _con / P _wpt ) is 1, that is, when contact power supply and non-contact power supply are equally applied. Similarly, Case 2 indicates a power conversion loss when the output ratio is maximized, and Case 3 indicates a power conversion loss when the output ratio is minimized. Note that the maximum ratio or the minimum ratio can be realized by the minimum unit of control when the total charge power _Pt is 3P or less, including the case where only contact power supply or non-contact power supply is operated, and when exceeding 3P. The ratio can be determined.

In FIG. 8, when starting from a state where the total charging power P _t at the start of the operation is 6P, the process proceeds to b: Step 2−B by the determination of a: Step 1 and operates with the ratio set value Sr as 1. After an arbitrary period, c: total charged electrical _{P t} at Step5 is the determined to have changed to 5P, d: the process proceeds to Step1. Incidentally, if the total charged electrical P _t is determined to not changed, maintaining the state of being shifted to Step2-B (b), the operation proceeds to Step5 after any period of time to repeat the same discrimination.

d: When it is determined in Step 1 that the total charging power P _t is 5P, that is, less than 6P, the process proceeds to e: Step 2-A, and the ratio setting value Sr is increased at an arbitrary interval up to the maximum output ratio of Case 2. The power conversion loss for each ratio set value Sr is calculated and stored. When the ratio set value Sr reaches the maximum value at 5P (total charge power P _t ), the process proceeds to f: Step 3 where the ratio set value Sr is decreased at an arbitrary interval until the minimum output ratio of Case 3 is reached. Each power conversion loss is calculated and stored.

Ratio set value Sr reaches the minimum in the 5P (total charged electrical _{P t),} g: Step4 migrated to, 5P power conversion loss information measured and calculated and stored for the (total charged electrical _{P t)} The ratio setting value Sr that minimizes the total power conversion loss is extracted from the inside, and the power conversion operation is performed by shifting the operating point of each part so that the ratio setting value Sr is reached. After an arbitrary period, if it is determined that the total charge power P _t has changed to 4P at h: Step 5, the process proceeds to i: Step 1 to obtain power conversion loss information at 4P (total charge power P _t ), and the optimum Move to operating conditions.

That is, as shown in the second embodiment, the charging power P _con and the non-contact power feeding are required for the required total charging power P _t including the case where both the contact power feeding and the non-contact power feeding are less than the rating. A plurality of operating conditions having different output ratios (ratio setting values Sr) of the charging power P _wpt are set. Then, while maintaining the total charging power P _t , the operation is performed at each output ratio of the set plurality of operating conditions, and the power conversion loss is calculated using the measured value at the time of operation, and the required total charging power P _{For t} , information on power conversion loss according to the output ratio for each operating condition is generated. Based on the information on the generated power conversion loss, the power can be received with higher efficiency by operating at the output ratio of the operation condition that minimizes the power conversion loss.

Embodiment 3 FIG.
In the first or second embodiment, the example in which the output ratio of the contact power supply and the non-contact power supply is adjusted so that the power conversion loss in the vehicle power receiving device is minimized has been described. However, the present invention is not limited to this. . The third embodiment is based on the information on the power conversion loss in consideration of the power conversion loss in the non-contact power transmission unit provided in the power supply equipment, and the contact power supply and the non-contact so that the total power conversion loss is minimized. The power supply output ratio was adjusted.

  FIG. 9 is for explaining the power receiving device for a vehicle according to the third embodiment. Like FIG. 6 used for the description of the first embodiment, the non-contact power feeding method and the contact power feeding method for each charging power. It is a graph which shows the power conversion loss with respect to charging electric power based on the output breakdown. Similar to FIG. 6, the horizontal axis represents the total charge power, and the vertical axis represents the power conversion loss. In addition, “◯” indicates that both contact power supply and non-contact power supply are used together. The numbers in “■” indicate the charging power allocated to contact power supply, and the numbers in “▲” indicate The charging power distributed to non-contact power feeding is shown respectively. The circuit configuration of the vehicle power receiving device according to the third embodiment is also substantially the same as that shown in FIGS. 1 to 5 used in the description of the first embodiment, as described in the second embodiment. The detailed description of will not be repeated.

  In the third embodiment, as described with reference to FIGS. 3, 4, and 5, data regarding power conversion loss in the power feeding facility 9 that is separate from the vehicle power receiving device 1 is required. That is, it is necessary to obtain information in the power supply facility 9 such as power conversion loss or power conversion efficiency of the non-contact power transmission unit 34 or AC output of the AC power supply 90.

  At this time, as described in the first embodiment, data may be obtained from the power supply facility 9 using a communication unit (not shown). However, if the control unit 7 can store the information in advance, or if the operation can be controlled only by data that can be calculated from the information obtained in the vehicle power receiving device 1, the communication means can be omitted. For example, when it is known that the power conversion loss of the non-contact power transmission unit 34 is related to the state of the contact power reception unit 2 or the non-contact power reception unit 35, the calculation is performed based on the measured value indicating the state of the related part. What should I do?

Further, in the vehicle power receiving device 1 according to the present embodiment, in the aspect of exchanging data with the power supply facility 9, the control unit 7 not only has a value of the input power factor of the contact power receiving unit 2 of 1. The operation control of the non-contact power feeding unit 3 can be performed so that the value of the input power factor as the non-contact power feeding unit 3 is also 1. At that time, the duty ratio of each switching element for controlling the detection value (AC input current i _{ac —} 3) of the AC input current as the non-contact power feeding unit 3 detected by the current detector 83 a is calculated.

Specifically, a sinusoidal predetermined current command (target sine wave current) i _{ac — 3} s synchronized with the detected value of the AC input voltage (= AC output voltage V _ac ) detected by the voltage detector 89v, and AC The current difference from the input current i _{ac — 3} is calculated. Using the calculated current difference as a feedback amount, the output is calculated by proportional control or proportional integral control. Further, for the detected value of the DC voltage of the DC capacitor 32 (capacitor DC voltage V _{c — 3} ) by a voltage detector (not shown), the voltage difference between a predetermined target DC voltage V _{c — 3} s and the capacitor DC voltage V _{c — 3} is calculated. . The output is calculated by proportional control or proportional integral control with the calculated voltage difference as a feedback amount.

  In the vehicle power receiving device 1 according to the third embodiment, the output ratio may be adjusted based on a predetermined power conversion loss table, as in the description using Table 1 of the first embodiment. In this case, in Table 2, not only the non-contact power receiving unit 35 but also the power conversion loss data as the non-contact power feeding unit 3 including the non-contact power receiving unit 35 and the non-contact power transmission unit 34 is used.

  In the vehicle power receiving device 1 according to the third embodiment, as shown in Table 2 and FIG. 9, the output ratio is adjusted based on a predetermined power conversion loss table. Table 2 is a table of power conversion losses corresponding to the charging power of the non-contact power feeding unit 3 instead of the non-contact power receiving unit 35 in Table 1. Here, the value of the table may be a value calculated from a theoretical formula, or may be a loss obtained by an experiment. In Table 2, for simplicity of explanation, the power conversion loss L is expressed not as a real value but as a standardized power conversion loss L. In addition, it cannot be overemphasized that the example of the power conversion loss shown in Table 2 is an example for description.

  Alternatively, similarly to the description using the flowchart of FIG. 7 of the second embodiment, the operation condition that minimizes the power conversion loss including the non-contact power transmission unit 34 is extracted by changing the ratio set value Sr during operation. You may use the technique to do.

  As described above, when adjusting the output ratio of contact power supply and non-contact power supply, in Embodiment 1 and Embodiment 2, the total power conversion loss of the vehicle power receiving device 1 is compared with that of the contact power receiving unit 2. It was handled as the sum of the power conversion losses of the contact power reception unit 35 and the DC / DC converter 5. However, in this Embodiment 3, the sum of the power conversion loss including the non-contact power transmission unit 34 is treated as the total power conversion loss.

Therefore, in the vehicle power receiving device 1 according to the third embodiment, with respect to contact power feeding, the charging power P _con of the contact power receiving unit 2 is the output power of the contact power receiving unit 2 as in the first and second embodiments. . On the other hand, regarding the non-contact power feeding, as the final output, the charging power P _wpt of the non-contact power receiving unit 35 is _set as the output power of the non-contact power feeding unit 3 as in the first and second embodiments. At this time, the charging power P _con of the contact power receiving unit 2 is calculated from the detected value of the DC voltage V _int of the integration DC capacitor 4 and the detected value of the output current i _{o —} 2 of the contact power receiving unit 2. The charging power P _wpt of the non-contact power receiving unit 35 represents the output power of the non-contact power receiving unit 35, and the detected value of the DC voltage V _int of the integration DC capacitor 4 and the output current i _{o — 3} of the non-contact power receiving unit 35. Calculated from the detected value.

The charging power P _con of the contact power receiving unit 2 may be used as the input power of the contact power receiving unit 2, and the charging power P _wpt of the non-contact power feeding unit 3 may be handled as the input power of the non-contact power feeding unit 3. At this time, the charging power P _con of the contact power receiving unit 2 can be calculated from the detected value of the AC power supply voltage and the detected value of the input current to the contact power receiving unit 2 (V _ac and i _{ac — 2} ). Further, the charging power P _wpt of the non-contact power feeding unit 3 is calculated from the detected value of the voltage of the AC power supply 90 and the detected value of the input current to the non-contact power transmitting unit 34 (V _ac and i _{ac — 3} ).

On the other hand, regarding the charging power for adjusting the output ratio, it is necessary to distinguish between the charging power P _con by contact power feeding and the charging power P _wpt by non-contact power feeding. There is no need to distinguish between contact feeds. For example, using the output voltage of the AC power supply 90 (AC output voltage V _ac ) and the output current i _ac , the output as the power supply facility 9 is calculated, and the difference from the total charging power P _t is calculated with the non-contact power supply unit 3. You may use as data of the total electric power conversion loss which does not distinguish with the contact power receiving part 2. FIG.

In other words, as shown in the third embodiment, the charging power P _con and the non-contact power feeding are required for the required total charging power P _t including the case where both the contact power feeding and the non-contact power feeding are less than the rating. A plurality of operating conditions having different output ratios of the charging power P _wpt are set. Then, using the data obtained in advance or the measurement result in the operation in which the output ratio is actually changed, the power conversion loss for each operation condition including the non-contact power transmission unit 34 is calculated, and the required total charge to the power P _t, generates information power conversion loss corresponding to the output ratio for each operating condition. Based on the generated power conversion loss information, by operating at the output ratio of the operation condition that minimizes the power conversion loss, it is possible to receive power more efficiently including the non-contact power transmission unit 34.

  In each embodiment, the vehicle power receiving device 1 includes the power storage device 6 that is a power source of the vehicle, and is provided for a power supply facility 9 that includes both non-contact power supply and contact power supply that will spread in the future. The preferred configuration has been described. However, a DC electric device can be connected in place of the power storage device 6 as described above as a suitable example even when a device that consumes DC power is added instead of the power storage device 6 and is adapted as a power conversion device. You may make it read as the power receiving apparatus which was made.

As described above, according to the power receiving device (vehicle power receiving device 1) according to each embodiment, the AC power that is electrically connected to the AC power supply 90 of the power supply facility 9 via the conductor and received from the conductor is converted to DC power. Contactless power receiving unit 2 that converts and outputs power and noncontact power transmission unit 34 provided in power supply facility 9 contactlessly receives AC power, converts the received AC power to DC power, and outputs the contactless power. A DC output integration unit (DC / DC) that integrates the output from the power reception unit 35, the output from the contact power reception unit 2, and the output from the non-contact power reception unit 35 and outputs the output to a load device (for example, the power storage device 6 or a DC device). Converter 5), contact power reception unit 2, non-contact power reception unit 35, and control unit 7 that controls the operation of the DC output integration unit, and each of contact power reception unit 2 and non-contact power reception unit 35 is a power supply facility. 9 is connected to the control unit 7. The output ratio of the power receiving portion 2 and the non-contact power receiving unit 35 (e.g., ratio set value Sr = charge power P _{con /} charge power P _wpt) based on information of the power conversion loss for different operating conditions of, to adjust the output ratio since it is configured to, in any total charged electrical P _t, thereby enabling efficient power reception. Note that the different operating conditions of the output ratio is set relative to the total charge power P _t, which is required, the output ratio (e.g., ratio set value Sr) is the set value of the plurality of different operating conditions, for example, contact This includes the case where both the power receiving unit 2 and the non-contact power receiving unit 35 output less than the rated output.

In particular, in any power supply method, considering the phenomenon that the efficiency varies depending on the operating point, one is operated at the rated output, and the other output is narrowed, and according to the total charging power P _t Since the output ratio is adjusted based on the power conversion loss information, higher efficiency can be aimed at. In addition, it is convenient because the heat source is not distributed and the heat source is dispersed.

Here, the control unit 7 is any of a table and a mathematical expression that can derive a power conversion loss from the value of the output of the contact power receiving unit 2 (charging power P _con ) and the value of the output of the non-contact power receiving unit 35 (charging power P _wpt ). If this is used as the information on the power conversion loss, it is possible to easily receive power with high efficiency without extra measurement.

  In particular, a plurality of tables or mathematical expressions, which are information on power conversion loss, are prepared in accordance with the degree of positional deviation between the non-contact power transmission unit 34 and the non-contact power reception unit 35. If the information to be used is selected from the information of multiple power conversion losses based on the information indicating the degree of misalignment obtained by detection, even if there is misalignment, it is optimal depending on the situation It is possible to adjust the output ratio using information on the power conversion loss. It goes without saying that an evaluation value indicating the degree of positional deviation may be used as a variable in the selected table or mathematical expression.

  Furthermore, if the power conversion loss information includes the power conversion loss in the non-contact power transmission unit 34, the information from the AC power supply 90 of the power supply facility 9 to the load device (power storage device 6) is comprehensive. Efficiency can be maximized.

On the other hand, the control unit 7 maintains the output (total charge power P _t ) to the load device (power storage device 6) constant, and the output ratio (for example, ratio set value Sr = charge power P _con ) as an operation condition. / Charging power P _wpt ) is changed. Then, a combination of the output ratio for each operating condition and the power conversion loss value calculated from the measured detected value in the vehicle power receiving device 1 is acquired as power conversion loss information, and the power conversion loss value is minimized. If the contact power receiving unit 2 and the non-contact power receiving unit 35 are operated with the output ratios indicating the values, the optimum output ratio is adjusted in accordance with the situation without collecting information in advance. Highly efficient power reception is possible.

A communication unit (not shown) that performs data communication with the power supply facility 9 is provided, and the control unit 7 receives at least one of the output of the AC power supply 90 and the input current i _{ac_3} to the non-contact power transmission unit 34 received via the communication unit. Is used for calculation of the value of power conversion loss, the overall efficiency from the AC power supply 90 of the power supply facility 9 to the load device (power storage device 6) can be maximized.

  If the vehicle power receiving device 1 includes the power receiving device described above and the power storage device 6 used as a load device for the power source of the vehicle, the vehicle can be efficiently charged. In particular, for vehicles, the power supply repeatability is high and the output is high, so that an energy saving effect can be expected.

  The vehicle power receiving device 1 has a function of switching the operation of the contact power receiving unit 2, the non-contact power receiving unit 35, and the direct current output integration unit (DC / DC converter 5) to reverse power feeding from the power storage device 6 to the power feeding facility 9. When the control unit 7 switches the operation to the reverse power supply, the contact power receiving unit 2 and the non-contact power reception in the reverse power supply are based on the information corresponding to the reverse power supply corresponding to the power conversion loss information described above. If the output ratio of the unit 35 is adjusted, high-efficiency power transmission with small power conversion loss is possible even in reverse transmission. In addition, the type in which the power feeding facility 9 can be reversely transported is assumed, and in that case, it is assumed that the non-contact power transmission unit 34 can cope with it by issuing a reverse feed command to the power feeding facility 9.

  Although various exemplary embodiments and examples are described in this application, various features, aspects, and functions described in one or more embodiments may be described in particular embodiments. The present invention is not limited to the above-described application, but can be applied to the embodiments alone or in various combinations. Accordingly, countless variations that are not illustrated are envisaged within the scope of the technology disclosed herein. For example, the case where at least one component is deformed, the case where the component is added or omitted, the case where the at least one component is extracted and combined with the component of another embodiment are included.

  The control unit 7 includes a processor 70 and a storage device 71 as shown in FIG. 10 as an example of hardware. Although not shown, the storage device includes a volatile storage device such as a random access memory and a nonvolatile auxiliary storage device such as a flash memory. Further, an auxiliary storage device of a hard disk may be provided instead of the flash memory. The processor 70 executes a program input from the storage device 71. In this case, a program is input from the auxiliary storage device to the processor 70 via the volatile storage device. The processor 70 may output data such as a calculation result to the volatile storage device of the storage device 71, or may store the data in the auxiliary storage device via the volatile storage device. The processor 70 may have a communication function, but may include a communication unit (not shown).

1: vehicle power receiving device (power receiving device),
2: contact power receiving unit, 21: AC / DC converter, 22: DC capacitor, 23: insulated DC / DC converter,
3: Non-contact power supply unit, 31: AC / DC converter, 32: DC capacitor, 33: Inverter circuit, 34: Non-contact power transmission unit, 35: Non-contact power reception unit,
4: DC capacitor for integration,
5: DC / DC converter (DC output integration unit),
6: Power storage device,
7: Control unit,
9: Power supply equipment, 90: AC power supply, 91t: AC terminal,
P _con : charging power (output of the contact power receiving unit), P _t : total charging power, P _wpt : charging power (output of the non-contact power receiving unit), Sr: ratio set value.

Claims (7)

A contact power receiving unit that is electrically connected to the AC power source of the power supply facility via a conductor, converts AC power received from the conductor into DC power, and outputs the DC power;
A non-contact power receiving unit that receives AC power in a non-contact manner with respect to a non-contact power transmission unit provided in the power supply facility, converts the received AC power into DC power, and outputs it,
DC output integration unit that integrates the output from the contact power reception unit and the output from the non-contact power reception unit, and outputs to the load device;
A control unit that controls operations of the contact power reception unit, the non-contact power reception unit, and the DC output integration unit,
The controller is
When each of the contact power receiving unit and the non-contact power receiving unit is connected to the power supply facility,
In a state where the output to the load device is kept constant, the output ratio of the contact power receiving unit and the non-contact power receiving unit is changed, the changed output ratio, and the power calculated from the detected value measured for each output ratio A combination with a value of conversion loss is acquired as information of power conversion loss, and the contact power receiving unit and the non-contact power receiving unit are operated at an output ratio at which the value of the power conversion loss indicates a minimum value. Power receiving device. A communication unit that performs data communication with the power supply facility,
The control unit uses a detection value of at least one of the output of the AC power supply and the input current to the contactless power transmission unit received via the communication unit for calculation of the value of the power conversion loss. The power receiving device according to claim 1 . A contact power receiving unit that is electrically connected to the AC power source of the power supply facility via a conductor, converts AC power received from the conductor into DC power, and outputs the DC power;
A non-contact power receiving unit that receives AC power in a non-contact manner with respect to a non-contact power transmission unit provided in the power supply facility, converts the received AC power into DC power, and outputs it,
DC output integration unit that integrates the output from the contact power reception unit and the output from the non-contact power reception unit, and outputs to the load device;
When the operation of the contact power receiving unit, the non-contact power receiving unit, and the DC output integration unit is controlled, and each of the contact power receiving unit and the non-contact power receiving unit is connected to the power supply facility, the contact power receiving unit And a control unit that adjusts the output ratio based on information on power conversion loss for each operating condition with a different output ratio of the non-contact power receiving unit,
As the information of the power conversion loss, the contactless power transmission unit and the non-contact power can be obtained from any one of a table and a mathematical expression that can derive the power conversion loss from the output value of the contact power reception unit and the output value of the contactless power reception unit. Plural are prepared according to the degree of positional deviation with the contact power receiving unit,
The control unit selects information to be used from among the plurality of pieces of power conversion loss information based on information indicating the degree of the positional deviation.   The power receiving device according to any one of claims 1 to 3, wherein the information on the power conversion loss includes a power conversion loss in the contactless power transmission unit. The power receiving device according to any one of claims 1 to 4 ,
A power receiving device for a vehicle, comprising: a power storage device used as a power source of the vehicle as the load device. The vehicle power receiving device has a function of switching the operation of the contact power receiving unit, the non-contact power receiving unit, and the DC output integration unit to reverse power feeding from the power storage device to the power feeding facility,
The control unit, when switching the operation to reverse power feeding, based on the information corresponding to the reverse power feeding corresponding to the information of the power conversion loss, the contact power receiving unit and the non-contact power receiving unit in the reverse power feeding The vehicle power receiving device according to claim 5 , wherein an output ratio of the vehicle is adjusted. A power storage device used for a power source of a vehicle,
  A contact power receiving unit that is electrically connected to the AC power source of the power supply facility via a conductor, converts AC power received from the conductor into DC power, and outputs the DC power;
  A non-contact power receiving unit that receives AC power in a non-contact manner with respect to a non-contact power transmission unit provided in the power supply facility, converts the received AC power into DC power, and outputs it,
  DC output integration unit that integrates the output from the contact power reception unit and the output from the non-contact power reception unit, and outputs to the power storage device,
  When the operation of the contact power receiving unit, the non-contact power receiving unit, and the DC output integration unit is controlled, and each of the contact power receiving unit and the non-contact power receiving unit is connected to the power supply facility, the contact power receiving unit And a control unit that adjusts the output ratio based on information on power conversion loss for each operating condition with a different output ratio of the non-contact power receiving unit,
  The function of switching the operation of the contact power receiving unit and the non-contact power receiving unit, and the DC output integration unit to reverse power feeding from the power storage device to the power feeding equipment,
  The control unit, when switching the operation to reverse power feeding, based on the information corresponding to the reverse power feeding corresponding to the information of the power conversion loss, the contact power receiving unit and the non-contact power receiving unit in the reverse power feeding The vehicle power receiving device is characterized in that the output ratio of the vehicle is adjusted.

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