WO2007048277A1

WO2007048277A1 - A multi-edge synchronous switching power supply and its controller

Info

Publication number: WO2007048277A1
Application number: PCT/CN2005/001789
Authority: WO
Inventors: Weilun Chen; Jun Chen
Original assignee: Weilun Chen; Jun Chen
Priority date: 2005-10-28
Filing date: 2005-10-28
Publication date: 2007-05-03
Also published as: CN1922781A; CN1922781B

Abstract

A multi-edge synchronous switching power supply which includes a switch-converting unit, a DC output unit and a multi-edge synchronous controller. The multi-edge synchronous controller includes an AC polarity detection unit, an overload detection unit, a power factor detection unit, a DC output feedback detection unit, a multi-edge synchronous timing generator unit and an AC polarity synchronous switch and drive signal synthesizing and mapping unit. Accordingly, the number of the circuit elements is reduced, the switching power supply circuit and the control circuit are simplified, and the activity and the reliability of the power converting of the switching power supply are improved.

Description

Multi-edge synchronous switching power supply and controller thereof

The invention relates to a switching power supply and a controller thereof, in particular to a power supply circuit for a cylinder switching power supply, a switching power supply for improving power conversion efficiency, and more particularly to a multilateral edge synchronous switching power supply and a controller thereof. Background technique

FIG. 1 is a circuit diagram of a conventional switching power supply including an AC rectifying unit, a power factor correcting unit, a power switch converting unit, and a DC rectifying unit.

As shown, the existing complete switching power supply is at least four levels:

The first stage is an AC rectification input unit: converting AC to unipolar DC;

The second stage is the power factor correction unit: During the working period of the power factor correction controller, the monopolar direct current is converted into a stable high voltage direct current, and the controller controls the circuit switch only to adjust the width of the output drive pulse;

The third stage is the power switch conversion unit: during the working period of the switching power supply pulse width controller, the high voltage DC isolation is transmitted to the DC output stage, and the controller controls the circuit switch only to adjust the width of the output driver ^;

The fourth stage is the DC output unit: the high-frequency AC rectification output after the transformation is completed, thereby completing the complete power conversion cycle of the switching power supply.

The switching power supply using the above unit has the following disadvantages:

The technology of the existing controller is only to generate a modulated pulse with a controllable pulse width in order to complete a specified single function, and does not take information such as the front and rear edges of the pulse and the synchronization relationship of the edges as a controllable factor, and thus cannot further The geochemical power circuit reduces the power components in the circuit and reduces the workload of some power components.

The controller is used too much, and the total number of circuit components is both complicated and complicated, which limits the reliability and conversion efficiency of the power supply. The reason is: The more controllers in the circuit, not only increase the power conversion cost, but also increase The failure rate of circuit operation; the more power components in the circuit, not only the switching loss and conduction loss of the switching power supply itself will increase, but also the work failure rate naturally increases. Summary of the invention In order to achieve the specifications when working alone at all levels of the guaranteed and superior switching power supply, the switching power supply circuit is reduced, the power components and controllers in the circuit are reduced, and the power conversion efficiency, reliability and reliability are significantly improved. Practicality, the present invention proposes a multilateral edge synchronous switching power supply and a method of operating the same.

The invention provides a multilateral edge synchronous switching power supply, comprising:

a switching conversion unit, configured to convert alternating current into high voltage direct current, and convert the high voltage direct current into high voltage alternating current;

a DC output unit, configured to rectify the high voltage alternating current and output the same;

a multi-edge edge synchronization controller, connected to the switch conversion unit and the DC output unit, detecting an operating state of the switching power supply, generating a temporal segment within the effective switching cycle, and generating a pulse width controllable The edge synchronization timing controllable modulation pulse signal is used to control the operation of the switching unit.

The switch converting unit 201 includes: an alternating current power source, first and second unidirectional electronic devices, a storage inductor, a transducing transformer, a capacitor, first and second main switching devices, and first and second auxiliary switches Device; among them,

The first and second unidirectional electronic devices are connected in series, and the first and second main switching devices are connected in series, and an energy storage inductor and an alternating current power source are connected between their midpoints of the series, thereby forming a boost type Switching circuit to obtain high voltage direct current;

The first and second auxiliary switching devices are connected in series, and a transducing transformer is connected between the midpoint of the series and the midpoint of the first and second main switching devices in series, thereby forming a full bridge power transfer switch. a circuit to achieve isolated transmission of high voltage direct current;

The AC power source is coupled to the polygon edge synchronization controller 203 such that the operational state of the controller can be synchronized to the polarity change of the AC power source.

The switch conversion unit 301 is a single-phase half-bridge switch conversion unit, including: an AC power source, first and second unidirectional electronic devices, first and second capacitors, first and second main switching devices, energy storage inductors, Transducing transformer; wherein

The first and second capacitors are connected in series, and a transducing transformer is connected between the midpoint of the series and the midpoint of the series connection of the first and second main switching devices, thereby forming a half bridge power conversion switch circuit. Real Isolation transmission of high voltage direct current;

The AC power supply and the multiple edge connector synchronization controller ^{^303,} so that the controller can synchronize the operation state change of the polarity of the AC power supply.

The switch conversion unit 305 is a three-phase half-bridge transfer switch unit, including: first, ^second, and ^third alternating current power sources, first, second, and third energy storage inductors, first, ^second, and ^third transducers Transformer, first and ^second capacitors, first and second main switching devices, third and fourth main switching devices, ^fifth and sixth main switching devices;

After the first AC power source is connected in series with the first energy storage inductor, the first and second main switching devices are connected in series at a midpoint, thereby forming a step-up switching circuit, thereby obtaining a high-voltage direct current of the first phase; After the second AC power source is connected in series with the second energy storage inductor, the ^third and fourth main switching devices are connected in series at a midpoint, thereby forming a step-up switching circuit, thereby obtaining a high voltage direct current of the ^second phase; 3 after the AC power source is connected in series with the third energy storage inductor, and connected to the midpoint of the fifth and sixth main switching devices in series, thereby forming a step-up switching circuit, thereby obtaining the high voltage direct current of the third phase; The second capacitor is connected in series, and a first transducing transformer is connected between the midpoint of the series connection and the midpoint of the first and second main switching devices, thereby forming a half bridge power conversion switch circuit to realize the first Isolation transmission of phase high voltage direct current;

The first and second capacitors are connected in series, and a second transducing transformer is connected between the midpoint of the series and the midpoint of the series connection of the third and fourth main switching devices, thereby forming a half bridge power transfer switch. a circuit to achieve isolated transmission of the high voltage direct current of the second phase;

The first and second capacitors are connected in series, and a third transducing transformer is connected between the midpoint of the series and the midpoint of the fifth and sixth main switching devices in series, thereby forming a half bridge power transfer switch. a circuit to achieve isolated transmission of the high voltage direct current of the third phase;

The first, second, and third alternating current power sources are coupled to the multilateral edge synchronization controller 307 such that the operating state of the controller can be synchronized with the polarity change and phase change of the three-phase alternating current power source.

The multilateral edge synchronization controller includes:

AC polarity detecting unit 401, overload detecting unit 402, power factor detecting unit 403, DC output feedback detecting unit 404, polygon edge synchronization timing generator unit 405, and AC polarity synchronization switch and driving signal synthesis, mapping unit 406; The AC polarity detecting unit 401 is configured to provide information about size and polarity change of the AC power source;

The overload detecting unit 402 is configured to provide protection of the power carrying capacity; The power factor detecting unit 403 is configured to provide an inverse of the power quality factor correction quality; the DC output feedback detecting unit 404 is configured to provide closed loop feedback of the load power source;

Multiple edge sync timing generator unit 405, 401, the overload detection unit 402, the power factor detection unit ^403, the DC output feedback detection unit 404 is connected to the AC polarity detection unit, and receive their signals, generating effective switching cycle Four temporal segments 506;

An AC polarity synchronizing switch and driving signal synthesizing and mapping unit 406 is configured to receive signals of the multi-edge sync timing generator unit, the AC polarity detecting unit 401, and the overload detecting unit 40 ² in parallel as an input signal. The pulse width controllable and the edge synchronization timing controllable modulation pulse signal required for the operation of the main switch and the auxiliary switch are generated.

The multilateral edge timing generator unit includes: a main switch timing 501 in an active switching period and an auxiliary switching timing 502 in an active switching period, a main switching synchronization trailing edge 503, a secondary switching synchronization leading edge 504, and a secondary switching synchronization trailing edge 505.

The effective switching period includes four temporal segments 506, including:

The main switch operating time segment is used for energy storage of the power factor correction circuit;

The auxiliary switch working state segment is used for the first energy conversion of the power switch circuit while continuing the energy storage state of the power factor correction circuit;

The time switch segment of the main switch and the auxiliary switch are synchronously switched, and are used for the second energy conversion of the power switch circuit, and the power factor correction circuit is converted into the release state;

The state of the main switch and the auxiliary switch are all turned off, so that the energy conversion is controlled.

The first and second unidirectional electronic devices are diodes.

The above main switching device and auxiliary switching device are field effect transistors or Hanji transistors or insulated gate bipolar transistors or controllable bidirectional electronic switches.

The invention also provides a multilateral edge synchronization controller, configured to detect an operating state of the switching power supply, generate a temporal section in an effective switching period according to the working state, and generate a pulse width controllable and an edge synchronization timing controllable The modulated pulse signal is used to control the operation of the switching unit in the switching power supply, and includes: an AC polarity detecting unit 401, an overload detecting unit 402, a power factor detecting unit 403, a DC output feedback detecting unit 404, and a multilateral edge synchronization timing generation. Unit 405 and AC polarity synchronization switch and drive signal synthesis, mapping unit 406;

The AC polarity detecting unit 401 is configured to provide information about the size and polarity of the AC power source; An overload detecting unit 402 is configured to provide protection of a power carrying capacity;

The power factor detecting unit 403 is configured to provide feedback of the power quality factor correction quality; the DC output feedback detecting unit 4 (M, for providing closed-loop feedback of the load power source;

Multiple edge sync timing generator unit ^{^405,} and the AC polarity detection unit 401, the overload detection unit 402, the power factor detection unit ^{^403,} the DC output feedback detection unit ⁴ ([mu], and receives signals thereof , generating four temporal segments 506 within the effective switching period;

Wherein, the edge timing generator unit is different from the working principle of all existing switching power supply controllers. In the prior art, they only operate based on pulse width regulation, generally referred to as a pulse width controller, and the present invention Not only based on pulse width regulation, but also based on the pulse timing of FIG. 6 and the constraint relationship of pulse edges; in each active switching cycle, the main switch is generated by pressing the sequential temporal segments of T1, Τ2, Τ3, Τ4 The output pulse of the auxiliary switch.

The beneficial effects of the invention are:

Under the condition that the functions of the existing switching power supply are completely unchanged, the multi-edge synchronous switching power supply and the multilateral edge synchronous controller are adopted, so that the number of circuit power components and controllers is significantly reduced, thereby not only significantly improving the present Inventing the cost performance of the power supply, but also effectively improving the power conversion efficiency and reliability.

DRAWINGS

1 is a circuit diagram of a conventional switching power supply including an AC rectifying unit, a power factor correcting unit, a power switching converter unit, and a DC rectifying unit;

2 is a circuit diagram of a switching power supply of the present invention;

Figure 3 is a circuit diagram of the single-phase half-bridge switching power supply of the present invention;

Figure 3 is a circuit diagram of the three-phase half-bridge switching power supply of the present invention;

4 is a block diagram showing the working principle of the polygon edge synchronization controller according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a multi-edge synchronization timing according to an embodiment of the present invention; FIG.

Figure 6 is a circuit diagram of the embodiment of Figure 2;

7A to 7B are state diagrams showing the operation of the embodiment of Fig. 6; 8A to 8F are state diagrams showing the operation of the embodiment of Fig. 3A;

9A through 9F are state diagrams showing the operation of the embodiment of Fig. 3B.

detailed description

Preferred embodiments of the present invention will be described with reference to the drawings.

Example 1

As shown in FIG. 2, it is a circuit diagram of a switching power supply of the present invention. The switching power supply includes: a switch converting unit 201, configured to convert alternating current into high voltage direct current, and convert the high voltage direct current into high voltage alternating current; a direct current output unit 202, configured to rectify the high voltage alternating current and output; 203, the switching unit 201 and the DC output unit ^{^202,} and controls the switching unit 201 of the work.

The switch conversion unit 201 includes: an AC power source AC, first and second diodes D1, D2, a storage inductor L, a transducing transformer T1, a capacitor C, and first and second main switches SW1 and SW2. , first and second auxiliary switches SW3, SW4; wherein

The first and second diodes D1 and D2 are connected in series, and the first and second main switches SW1 and SW2 are connected in series, and an energy storage inductor L and an alternating current power source AC are connected between their midpoints of the series. Forming a step-up switching circuit to obtain high voltage direct current;

The first and second auxiliary switches SW3 and SW4 are connected in series, and a transducing transformer T1 is connected between a midpoint of the series and a midpoint of the first and second main switches SW1 and SW2. Full-bridge power conversion switch circuit to achieve isolated transmission of high-voltage direct current;

The multilateral edge synchronization controller shown in FIG. 4 and FIG. 5 includes:

AC polarity detecting unit 401, overload detecting unit 402, power factor detecting unit 403, DC output feedback detecting unit 404, polygon edge synchronization timing generator unit 405, and AC polarity synchronization switch and driving signal synthesis, mapping unit 406; The AC polarity detecting unit 401 is configured to provide a size and polarity change information of the AC power source;

The overload detecting unit 402 is configured to provide protection of the power carrying capacity;

The power factor detecting unit 403 is configured to provide feedback of the power quality factor correction quality; the DC output feedback detecting unit 404 is configured to provide closed loop feedback of the load power source;

The multi-edge edge synchronization timing generator unit 405 is connected to the alternating current polarity detecting unit 401, the overload detecting unit 402, the power factor detecting unit 403, and the direct current output feedback detecting unit 404, and receives signals thereof to generate an effective switching period. Four tense segments 506; An AC polarity synchronizing switch and driving signal synthesizing and mapping unit 406 is configured to receive signals of the multi-edge sync timing generator unit, the AC polarity detecting unit 401, and the overload detecting unit 40 ² in parallel as an input signal. The pulse width controllable and the edge synchronization timing controllable modulation pulse signal required for the operation of the main switch and the auxiliary switch are generated.

The multilateral edge timing generator unit includes: a main switch timing 501 in an active switching period and an auxiliary switching timing 502 in an active switching period, a main switch synchronization trailing edge 503, a secondary switch synchronization leading edge 504, and a secondary switching synchronization trailing edge 50 ⁵ .

The four time segments 506 of the effective switching period include:

The state switch segment of the main switch and the auxiliary switch are synchronously switched, and are used for the 二次 secondary energy conversion of the power switch circuit, and the power factor correction circuit is converted into the release state;

As shown in Fig. 6, the circuit diagram of the embodiment of Fig. 2 is driven by the multi-edge synchronous controller U1 to drive the eight operational timing states of the circuit.

First, the polarity of the alternating current is presented as the case where the LB1 end is positive and the L2 end is negative. Timing Mode 1: As shown in Figure 7A, the multi-edge synchronous controller U1 operates in the T1 transient phase of the effective switching period, called the "negative T1 state"; the power factor correction switching circuit consists of the diode D2, the storage inductor L, and the AC power supply AC. And the main switch SW2 is composed. The controller arbitration result outputs a pulse, making the main switch

SW2 is turned on to realize two functions of AC rectification and power factor correction; at this time, the main switch SW2 operates in the energy storage state of the power factor correction, and the current flow direction in the circuit is indicated by a chain line in the figure; As shown in Fig. 7B, the multi-edge synchronous controller U1 operates in the T2 state section of the effective switching period, which is called "negative T2 state"; the power factor correction switching circuit consists of diode D2, energy storage inductor L, AC power supply AC, and main switch SW2. The power conversion switch circuit is composed of an auxiliary switch tube SW3, a transducing transformer T and a main switch tube SW2. The controller arbitration result increases the output of a pulse, so that the auxiliary switch SW3 is turned on when the main switch SW2 is turned on; the main switch not only continues to operate in the energy storage state of the power factor correction, but also realizes the power factor correction function, and the current flow direction is as shown in the middle point. As shown by the scribe line, the initial power conversion state is started together with the auxiliary switch, and the power conversion function is realized. The current flow direction is shown by a solid line in the figure, and it can be seen that a beneficial and remarkable feature is the power transfer at this time. The switching loss of the switching process is reduced by half compared to the existing power conversion switch circuit, because one of the switching transistors SW ² in the power conversion switch circuit is already turned on before the switching circuit is turned on; Timing State 3: See Figure 7C The multi-edge synchronous controller U1 operates in the T ³ state phase of the effective switching period, called the "negative T3 state"; the power factor correction switching circuit consists of the diode D2 'storage inductor L, the AC power source AC, the main switch tube SW1 and The capacitor C1 is composed; the power conversion switch circuit is composed of a main switch tube SW1, a transducing transformer T and an auxiliary switch tube SW4. The controller arbitration result causes the main switch SW2 and the auxiliary switch SW3 to be synchronously turned off at the edge 503 after the main switch is synchronized, and at the same time, the main switch SW1 and the auxiliary switch SW4 are also turned on synchronously at the auxiliary switch synchronization leading edge 504; Working in the energy state correction of the energy release state, not only continue to achieve the power factor correction function, its current flow direction is shown in the dotted line. At the same time, the second power conversion state is started together with the auxiliary switch, and the power conversion function is realized again. The current flow direction is shown by the solid line in the figure, and another useful and remarkable feature can be seen from this time. The switch conduction loss of the power conversion switch process is reduced to zero compared to the switching conduction loss of the existing power conversion switch circuit, because the current and power factor correction circuit of the power conversion switch circuit flowing through the switch SW1 flows through the switch SW1 The current is reversed at the opposite end; a further advantageous feature is that the energy released by the power factor correction circuit is not the same as the existing power factor correction circuit, and the energy is first transferred to the storage capacitor, but Direct transfer to the power transfer switch circuit, thus greatly reducing the capacity requirements for the storage capacitor; the grounding reduces the cost and volume of the power supply of the present invention;

Timing state 4: As shown in Figure 7D, the multi-edge synchronous controller U1 operates in the T4 phase of the effective switching period, called the "negative T4 state"; the power factor correction switching circuit consists of the diode D2, the energy storage inductor! ^, AC power supply AC, converter transformer T, auxiliary switch tube SW3 diode, and capacitor C1. The controller arbitration result causes the main switch SW1 and the auxiliary switch SW4 to be synchronously turned off at 505 after the auxiliary switch is synchronized, and the switching unit continues to operate in the power factor corrected release state, and the current flow direction is as shown by the dashed line in the figure. , but the power conversion state ends.

The above four operating states are repeated in sequence until the polarity of the alternating current changes. At this time, the polarity of the alternating current appears to be negative at the LB1 end and positive at the L2 end.

Timing state 5: As shown in Fig. 7E, the multi-edge synchronous controller U1 operates in the T1 state segment of the effective switching period, which is called "positive T1 state"; the power factor correction switching circuit is composed of diode D1, energy storage inductor ^ AC power supply AC and The main switch tube SW1 is composed. The controller arbitration result makes the main switch SW1 open, and realizes two functions of AC rectification and power factor correction; at this time, the main switch unit operates in the energy storage state of the power factor correction, and the current flow direction in the circuit is as shown by the dotted line in the figure. Shown Timing state 6: As shown in Fig. 7F, the multi-edge synchronous controller U1 operates in the T2 transient section of the effective switching period, which is called "positive Τ2 state,"; the power factor correction switching circuit is composed of diode D1, energy storage inductor L, and AC power supply. The AC and the main switch tube SW1 are composed; the power switch circuit is composed of the main switch tube SW1, the transducing transformer T and the auxiliary switch tube SW4. The controller arbitration result causes the auxiliary switch SW4 to be turned on when the main switch SW1 is turned on; the main switch continues to work. In the energy storage state of the power factor correction, not only the power factor correction function is realized, but also the current flow direction in the circuit is shown by the dotted line in the figure, and the initial power conversion state is started together with the auxiliary switch to realize the power conversion function. The direction of current flow is shown by the solid line in the figure. It can be seen that a beneficial and significant feature is that the switching loss of the power conversion switch process is reduced by half compared with the existing power conversion switch circuit because of the power conversion switch circuit. One of the switch tubes SW1 has been opened before the switch circuit is turned on;

Timing state 7: As shown in Fig. 7G, the multi-edge synchronous controller U1 operates in the T3 state segment of the effective switching period, which is called "positive T3 state"; the power factor correction switching circuit is composed of diode D1, energy storage inductor L, AC power supply AC The main switch tube SW2 and the capacitor C1 are composed; the power conversion switch circuit is composed of an auxiliary switch tube SW3, a transducing transformer T, and a main switch tube SW2. The controller arbitration result causes the main switch SW1 to be turned off and the auxiliary switch SW4 to be turned off synchronously at 503 after the main switch is synchronized, while the main switch SW2 and the auxiliary switch SW3 are also turned on synchronously at the auxiliary switch synchronization leading edge 504. The main switch operates in the release state of the power factor correction, and not only continues to implement the power factor correction function, but also the current flow direction is shown by the dashed line in the figure. At the same time, the second power conversion state is started together with the auxiliary switch, and the power conversion function is realized again. The current flow direction is shown by the solid line in the figure, and another useful and remarkable feature can be seen from this time. The switch conduction loss of the power conversion switch process is reduced to zero compared to the switching conduction loss of the existing power conversion switch circuit, because the current and power factor correction circuit of the power conversion switch circuit flowing through the switch SW1 flows through the switch SW2 The current is reversed at the opposite end; another beneficial feature is that the energy released by the power factor correction circuit is not the same as the existing power factor correction circuit. The energy is first transferred to the storage capacitor, but directly Transferred to the power transfer switch circuit, thus greatly reducing the capacity requirements for the storage capacitor; the grounding reduces the cost and volume of the power supply of the present invention;

Timing state 8: As shown in Fig. 7H, the multi-edge synchronous controller U1 operates in the T4 state segment of the effective switching period, which is called "positive T4 state"; the power factor correction switching circuit is composed of diode D1, energy storage inductor L, AC power supply AC , the transformer transformer T, the diode of the auxiliary switch tube SW4, and the capacitor C1. The controller arbitration result causes the main switch SW2 and the auxiliary switch SW3 to be turned off synchronously at 505 after the auxiliary switch is synchronized, and the switching unit continues to operate in the energy-corrected release state, and the current flow direction is as shown in the figure. The dotted line is shown, but the power conversion state ends. The above four operating states are repeated in sequence until the polarity of the alternating current changes. Then the circuit starts again from "Time Series 1: ".

Example 2

As shown in FIG. 3A, the switch conversion unit 301 is a single-phase half-bridge switch conversion unit, including: an AC power supply, first and second diodes D1, D2, first and ^second capacitors Cl, C2, first and third ² main switch SW1, SW2, energy storage inductor transducing transformer T1;

The first and second diodes D1 and D2 are connected in series, and the first and ^second main switches SW1 and SW2 are connected in series, and an energy storage inductor L and an alternating current power source AC are connected between their midpoints of the series. Forming a step-up switching circuit to obtain high voltage direct current;

The first and second capacitors C1 and C2 are connected in series, and a transducing transformer T1 is connected between the midpoint of the series connection and the midpoint of the first and second main switches SW1 and SW2, thereby forming a half. Bridge power transfer switch circuit to achieve isolated transmission of high voltage direct current.

The multilateral edge synchronization controller is the same as above, as shown in FIGS.

The multilateral edge synchronization controller is connected to the AC power source AC to obtain polarity change information of the AC power source.

In the embodiment shown in Fig. 3A, the driving of the six operational timing states of the circuit is effected by the multi-edge synchronization controller U1. The difference from Embodiment 1 is that the "negative T1 state" and the "negative T2 state" in this embodiment are combined into one temporal segment and completed in the timing state 1; the "positive T1 state" and the "positive T2 state" are also For a tense segment, it is completed in the timing state 4; as shown in FIGS. 8A to 8F, it is a working state diagram of FIG. 3A.

First, the polarity of the alternating current is shown as positive at the right end and negative at the left end. Timing state 1: As shown in Figure 8A, the multi-edge synchronous controller U1 operates in the Π-phase segment and the T2-phase segment of the effective switching cycle; the power factor correction switching circuit consists of the diode D2, the energy storage inductor L, the AC power source AC, and the main switch. SW2 is composed; the power conversion switch circuit is composed of a capacitor C1, a transducing transformer T and a main switch SW2. The controller arbitration result makes the main switch SW2 open; the main switch not only realizes the power factor correction energy storage state, but also realizes the power factor correction function. The current flow direction in the circuit is as shown by the dotted line in the figure, and the first time starts. The power conversion state realizes the power conversion function, and the current flow direction thereof is shown by a solid line in the figure;

Timing State 2: See Figure B. The M3 operates along the synchronous controller U1 in the T 3 state phase of the effective switching period, called the "negative T3 state"; the power factor correction switching circuit consists of the diode D2, the inductor L, and the AC power source AC. The main switch tube SW1, the capacitor C1 and the capacitor C2 are composed; the power conversion switch circuit is composed of a main switch tube SW1, a transducing transformer T, and a capacitor C2. Controller arbitration results in the main switch SW2, in the main switch At the same time, the synchronous edge 503 is synchronously turned off, and at the same time, the main switch SW1 is also turned on synchronously at the auxiliary switch synchronization leading edge 504; the main switch operates in the power factor corrected release state, and not only continues to implement the power factor correction function, but also its current flow The direction is shown by the dotted line in the figure. At the same time, the second power conversion state is started, and the power conversion function is realized again. The current flow direction is shown by the solid line in the figure, and it can be seen again that a beneficial and remarkable feature is that the power factor correction circuit releases the The energy is not the same as the existing power factor correction circuit. The energy is first transferred to the storage capacitor, but directly transferred to the power conversion switch circuit, thus greatly reducing the capacity requirement for the storage capacitor; The cost and volume of the power supply of the present invention;

Timing State 3: As shown in Figure 8C, the multi-edge synchronous controller U1 operates in the T4 transient phase of the effective switching period, called the "negative T4 state"; the power factor correction switching circuit consists of the diode D2, the storage inductor L, and the AC power supply AC. , Transducer transformer T, capacitor C2 and C1. The controller arbitration result causes the main switch SW1 to be synchronously turned off at 505 after the auxiliary switch is synchronized, and the switching unit continues to operate in the power factor corrected release state, and the current flow direction is as shown by the dotted line in the figure, but the power conversion state End.

The above three operating states are repeated in sequence until the polarity of the alternating current changes. At this time, the polarity of the alternating current appears to be negative at the right end and positive at the left end.

Timing state 4: As shown in Fig. 8D, the multi-edge synchronous controller U1 operates in the T1 state segment and the Τ2 phase segment of the effective switching period; the power factor correction switching circuit is composed of the diode D1, the inductor L, the AC power source AC, and the main switch tube SW1. The power conversion switch circuit is composed of a main switch tube SW1, a transducing transformer T and a capacitor C2. The controller arbitration result makes the main switch SW1 open; the main switch not only realizes the power factor correction energy storage state, but also realizes the power factor correction function. The current flow direction in the circuit is as shown by the dotted line in the figure, and the first time starts. The power conversion state realizes the power conversion function, and the current flow direction thereof is shown by a solid line in the figure;

Timing State 5: As shown in Figure 8E, the multi-edge synchronous controller U1 operates in the T3 transient phase of the effective switching period, called the "positive T3 state"; the power factor correction switching circuit consists of the diode D1, the inductor L, the AC power source AC, and the main The switch tube SW2 and the capacitor C1 are composed; the power conversion switch circuit is composed of a capacitor C1, a transducing transformer T, and a main switch tube SW2. The controller arbitration result causes the main switch SW1 to be synchronously turned off at the edge 503 after the main switch is synchronized, while the main switch SW2 is also turned on synchronously at the auxiliary switch synchronization leading edge 504; the main switch operates in the power factor correction State, not only continue to achieve the power factor correction function, its current flow direction is shown in the dotted line in the figure. At the same time, the second power conversion state is started, and the power conversion function is realized again. The current flow direction is as shown by the solid line in the figure. From this, it can be seen that another beneficial and remarkable feature is that the power factor correction circuit is released. energy of Rather than transferring the energy to the storage capacitor first, as in the existing power factor correction circuit, it is directly transferred to the power conversion switch circuit, thus greatly reducing the capacity requirement for the storage capacitor; The cost and volume of the power supply of the present invention;

Timing state 6: As shown in Fig. 8F, the multi-edge synchronous controller U1 operates in the T4 state segment of the effective switching period, which is called "positive T4 state,"; the power factor correction switching circuit is composed of diode D1, energy storage inductor L, and AC power supply. The AC, the transducing transformer T, the capacitor C2, and the capacitor C1 are composed. The controller arbitration result causes the main switch SW2 to be synchronously turned off at the 505 after the auxiliary switch is synchronized, and the switching unit continues to operate in the power factor corrected release state. The current flow direction is shown by the dashed line in the figure, but the power conversion state ends.

The above three operating states are repeated in sequence until the polarity of the alternating current changes. Then the circuit starts again from "Time 1:".

Example 3

As shown in FIG. 3B, the switch conversion unit 305 is a three-phase half-bridge transfer switch unit, including: first, second, and third AC power sources Aca, Acb, ACc, first, second, and third inductors La, Lb, Lc, first, second and third transducing transformers Tla, T2a, T3a, first and second capacitors Cl, C2, first and second main switches SWla, SW2a, third and fourth main switches SWlb And the SW2b, the fifth and sixth main switches SWlc and SW2c, wherein the first AC power source ACa is connected in series with the first inductor La, and is connected to the first and second main switches SW1a and SW2a in series at a midpoint. Forming a step-up switching circuit to obtain a high-voltage direct current of the first phase; after the second alternating current power source ACb is connected in series with the second inductor Lb, the third and fourth main switches SW1b and SW2b are connected in series at a midpoint, thereby Forming a step-up switching circuit to obtain a high-voltage direct current of the second phase; after the third alternating current power source ACc is connected in series with the third inductor Lc, and the fifth and sixth main switches SWlc,

The SW2c is connected in series at a midpoint, thereby forming a step-up switching circuit, thereby obtaining a high-voltage direct current of the third phase; the first and second capacitors C1 and C2 are connected in series, and at the midpoint of the series thereof 1 and the second main switch device SWla, SW2a are connected to the transducer transformer Tla between the midpoints of the series, thereby forming a half-bridge power conversion switch circuit to realize the isolated transmission of the high-voltage direct current of the first phase;

The first and second capacitors C1, C2 are connected in series, and the transducing transformer Tib is connected between the midpoint of the series connection of the third and fourth main switches SW1b, SW2b, thereby forming a half a bridge power transfer switch circuit for achieving isolated transmission of the high voltage direct current of the second phase;

The first and second capacitors C1, C2 are connected in series, and the transducing transformer Tlc is connected between the midpoint of the series and the midpoint of the fifth and sixth main switches SWlc, SW2c in series, thereby forming a half The bridge power transfer switch circuit is used to realize the isolated transmission of the high voltage direct current of the third phase.

The polygon edge synchronization controller 307 is as shown in FIGS. 4 and 5. Multi-edge synchronization controller The 307 is connected to the AC power sources Aca, Acb, and Acc to obtain information on changes in polarity and phase of the AC power source. In the embodiment shown in FIG. 3B, the driving of the 12 operational timing states of the circuit is effected by the polygon edge synchronization controller U1. Due to the relative symmetry of the three-phase power supply, only the A-phase power supply is described here to avoid a large amount of repeated text.

Due to the isomorphism of the half-bridge structure, the present embodiment is identical to the second embodiment in the "negative state" and the "negative T2 state", which are combined into a temporal state and completed in the timing state 1; "positive T1 state" And the "positive state" also coincides with a tense segment, which is completed in the timing state 4; as shown in Figs. 9A to 9F.

First, the polarity of the alternating current ACa is shown as positive for the right end and negative for the left end. Timing state 1: As shown in Fig. 9A, the multi-edge synchronous controller U1 operates in the T1 state segment and the T2 transient segment of the effective switching period; the power factor correction switching circuit is composed of diodes D2b, D2c, inductor La, phase A AC power source ACa and The main switch SW2a is composed of; the power conversion switch circuit is composed of a capacitor CI, an A-phase transducing transformer Tla and a main switch SW2a. The controller arbitration result makes the main switch SW2a open; the main switch not only realizes the power factor correction energy storage state, but also realizes the power factor correction function. The current flow direction in the circuit is as shown by the dotted line in the figure, and the first time starts. The power conversion state realizes the power conversion function, and the current flow direction thereof is shown by a solid line in the figure;

Timing State 2: See Figure 9B, the multi-edge synchronous controller ϋΐ operates in the T3 transient phase of the effective switching period, called the “negative Τ3 state”; the power factor correction switching circuit is diode-D2b, D2c, inductor La, A-phase AC The power supply ACa, the main switch SW1a, the capacitors C1 and C2 are composed; the power conversion switch circuit is composed of a main switch SWla, an A-phase AC power source Tla, and a capacitor C2. The controller arbitration result causes the main switch SW2a to be synchronously turned off at the edge 503 after the main switch is synchronized, and at the same time the main switch SW1a is also turned on synchronously at the auxiliary switch synchronization leading edge 504; the main switch operates in the power factor corrected release state , not only continue to achieve the power factor correction function, its current flow direction is shown in the dotted line in the figure. At the same time, the second power conversion state is started, and the power conversion function is realized again. The current flow direction is shown by the solid line in the figure, and it can be seen again that a beneficial and remarkable feature is the power factor correction circuit. The energy is not the same as the existing power factor correction circuit. The energy is first transferred to the storage capacitor, but directly transferred to the power conversion switch circuit, thus greatly reducing the capacity requirement for the storage capacitor; The cost and volume of the power supply of the present invention;

Timing State 3: As shown in Figure 9C, the multi-edge synchronous controller U1 operates in the T4 transient phase of the effective switching period, called the "negative T4 state"; the power factor correction switching circuit is diode-D2b, D2c, inductive La, A-phase AC Power supply ACa, A-phase converter transformer Tla, capacitor C2 and C1. The controller arbitration result causes the main switch SWla to be synchronously turned off at 505 after the auxiliary switch is synchronized, and the switching unit continues to work in the work. The rate-corrected release state, the current flow direction is shown by the dotted line in the figure, but the power conversion state ends. The above three operating states are repeated in sequence until the polarity of the alternating current changes. At this time, the polarity of the alternating current ACa appears to be negative at the right end and positive at the left end.

Timing state 4: As shown in Fig. 9D, the multi-edge synchronous controller U1 operates in the ΊΊ-phase segment and the T2-phase segment of the effective switching cycle; the power factor correction switching circuit is composed of a diode Dlb, Die, an inductor La, an A-phase AC power source ACa, and The main switch SWla is composed of; the power conversion switch circuit is composed of a main switch SWla, an A-phase transducing transformer Tla and a capacitor C2. The controller arbitration result makes the main switch SWla open; the main switch not only operates in the energy storage state of the power factor correction, but also realizes the power factor correction function. The current flow direction in the circuit is as shown by the dotted line in the figure, and the first time starts. The power conversion state realizes the power conversion function, and the current flow direction thereof is shown by a solid line in the figure;

Timing State 5: As shown in Figure 9E, the multi-edge synchronous controller U1 operates in the T3 transient phase of the effective switching period, called the "positive T3 state"; the power factor correction switching circuit is diode-connected by the diodes Dlb, Dlc, the inductor La, A. The power supply ACa, the main switch SW2a and the capacitor C1 are composed; the power conversion switch circuit is composed of a capacitor C1, an A-phase transducing transformer Tla and a main switch SW2a. The controller arbitration result causes the main switch SW1a to be synchronously turned off at the edge 503 after the main switch is synchronized, while the main switch SW2a is also turned on synchronously at the auxiliary switch synchronization leading edge 504; the main switch operates in the power factor correction State, not only continue to achieve power factor correction function, its current flow direction is shown in the dotted line in the figure. At the same time, the second power conversion state is started, and the power conversion function is realized again. The current flow direction is as shown by the solid line in the figure. From this, it can be seen that another beneficial and remarkable feature is that the power factor correction circuit releases. The energy is not the same as the existing power factor correction circuit. The energy is first transferred to the storage capacitor, but directly transferred to the power conversion switch circuit, thus greatly reducing the capacity requirement for the storage capacitor; The cost and volume of the power supply of the invention are reduced;

Timing State 6: As shown in Figure 9F, the multi-edge synchronous controller U1 operates in the T4 transient phase of the active switching period, called the "positive T4 state"; the power factor correction switching circuit is diode-connected by the diodes Dlb, Die, the inductor La, A. Power supply ACa, A-phase converter transformer Tla, capacitor C2 and CI. The controller arbitration result causes the main switch SW2a to be synchronously turned off at the 505 after the auxiliary switch is synchronized, and the switching unit continues to operate in the power factor corrected release state, and the current flow direction is as shown by the dotted line in the figure, but the power conversion The state ends.

The above three operating states are repeated in sequence until the polarity of the alternating current changes. Then the circuit starts again from "Time Sequence 1: ".

In the above embodiment, the main switch and the auxiliary switch may be a field effect transistor or a bipolar transistor or an insulated gate micro transistor or a controllable bidirectional electronic switch.

The above specific embodiments are merely illustrative of the invention and are not intended to limit the invention.

Claims

Claim

A multi-edge synchronous switching power supply, comprising:

a switching conversion unit for converting alternating current into high voltage direct current, converting the high voltage direct current into high voltage alternating current;

a multilateral edge synchronization controller, connected to the switch conversion unit and the DC output unit, detecting an operating state of the switching power supply, generating a temporal segment within an effective switching cycle according to the working state, and generating a pulse width controllable The edge synchronization timing controllable modulation pulse signal is used to control the operation of the switching unit.

2. The multi-edge synchronous switching power supply according to claim 1, wherein the switching conversion unit (201) comprises: an alternating current power source, first and second unidirectional electronic devices, an energy storage inductor, and a transducing a transformer, a capacitor, first and second main switching devices, first and second auxiliary switching devices; wherein said first and second unidirectional electronic devices are connected in series, said first and second main switching devices Connecting in series, and connecting the energy storage inductor and the alternating current power source between their series midpoints, thereby forming a step-up switching circuit, thereby obtaining high voltage direct current;

The AC power source is coupled to the polygon edge synchronization controller (203) such that the operating state of the multi-edge synchronization controller is synchronized with the polarity change of the AC power source.

The multi-edge synchronous switching power supply according to claim 1, wherein the switching conversion unit (301) is a single-phase half-bridge switching conversion unit, comprising: an alternating current power supply, first and second unidirectional electronic devices The first and second capacitors, the first and second main switching devices, the energy storage inductor, and the transducing transformer; wherein the first and second unidirectional electronic devices are connected in series, and the first and second mains are The switching devices are connected in series, and an energy storage inductor and an alternating current power source are connected between their midpoints of the series, thereby forming a step-up switching circuit, thereby obtaining high voltage direct current;

The first and second capacitors are connected in series, and a transducing transformer is connected between the midpoint of the series and the midpoint of the first and second main switching devices in series, thereby forming a half bridge power conversion switch circuit. To achieve isolated transmission of high voltage direct current;

- the AC power source is connected to the multilateral edge synchronization controller (303) such that the multilateral The operating state of the step controller is synchronized with the polarity change of the AC power source.

The multi-edge synchronous switching power supply according to claim 1, wherein the switching conversion unit (305) is a three-phase half-bridge switching unit, comprising: first, ^second, and third alternating current power sources, 1. 笫2 and 3rd energy storage inductors, 1st, ^2nd and ^3rd transducing transformers, 1st and 2nd capacitors, 1st and 2nd main switchgear, 3rd and 4th main switchgear, ^5th And a sixth main switching device; wherein the first alternating current power source and the first energy storage inductor are connected in series, and then connected to the midpoint of the first and ^second main switching devices in series, thereby forming a step-up switching circuit, thereby obtaining高压1 phase high voltage direct current; after the second alternating current power source and the second energy storage inductor are connected in series, the ^third and fourth main switching devices are connected in series at a midpoint, thereby forming a step-up switching circuit, thereby obtaining the ^second The high-voltage direct current of the phase; the third alternating current power source is connected in series with the third energy storage inductor, and is connected to the midpoint of the fifth and sixth main switching devices in series, thereby forming a step-up switching circuit, thereby obtaining the third phase High voltage direct current; said first and second capacitors are connected in series and in its string Connecting a first transducing transformer between the midpoint and the midpoint of the first and second main switching devices, thereby forming a half bridge power transfer switch circuit to realize isolated transmission of the high voltage direct current of the first phase;

The first, second, and third alternating current power sources are coupled to the multilateral edge synchronization controller (307) such that the operating state of the multilateral edge controller is synchronized with the polarity and phase change of the alternating current power source.

The multi-edge synchronous switching power supply according to claim 1, wherein the multilateral edge synchronization controller comprises: an alternating current polarity detecting unit (401), an overload detecting unit (402), and a power factor detecting unit ( 403), a DC output feedback detecting unit (404), a polygon edge synchronization timing generator unit (405), and an AC polarity synchronization switch and a driving signal synthesis, mapping unit (406); wherein, an alternating current polarity detecting unit (401), Used to provide information on the size and polarity of the AC power source; an overload detection unit (402) for providing protection of the power carrying capacity;

a power factor detecting unit (403) for providing feedback of a power factor correction shield; a DC output feedback detecting unit (404) for providing closed loop feedback of the load power source; a multi-edge edge synchronization timing generator unit (40 ⁵ ) connected to the alternating current polarity detecting unit (401), the overload detecting unit (402), the power factor detecting unit (40 ³ ), and the DC output feedback detecting unit (404) And receiving their signals, generating four temporal segments (506) within the active switching period; an alternating polarity synchronous switch and driving signal synthesis, mapping unit (406) for juxtaposing the multilateral edge synchronization timing generator The signal of the unit and the AC polarity detecting unit (401) and the overload detecting unit (402) is used as an input signal to generate a pulse width controllable for the operation of the main switch and the auxiliary switch, and the edge synchronization timing is controllable. Modulate the pulse signal.

The multilateral edge-synchronous switching power supply according to claim 5, wherein the polygon edge timing generator unit comprises: a main switching timing (501) in an effective switching period and an auxiliary switching timing in an effective switching period. ( 502 ), the main switch sync trailing edge ( 503 ), the auxiliary switch sync leading edge ( 504 ), and the auxiliary switch sync trailing edge ( 505 ).

The multi-edge synchronous switching power supply according to claim 5, wherein the four time segments (506) of the effective switching period include:

The auxiliary switch working transient section is used for the primary energy conversion of the power switching circuit while continuing the energy storage state of the power factor correction circuit;

The multi-edge synchronous switching power supply according to claim 2 or 3, wherein the first and second unidirectional electronic devices are diodes.

The multi-edge synchronous switching power supply according to claim 2, wherein the first and second main switching devices, the first and second auxiliary switching devices are field effect transistors or Hanji transistors or insulated gates A pole transistor or a controllable bidirectional electronic switch.

The multi-edge synchronous switching power supply according to claim 3, wherein the first and second main switching devices are field effect transistors or singular or insulated gate bipolar transistors or controllable bidirectional electronic switches. .

The multilateral edge-synchronous switching power supply according to claim 4, wherein the first, second, third, fourth, fifth, and sixth main switching devices are field effect transistors or bipolar transistors or Insulated gate bipolar transistor or controllable bidirectional electronic switch.

12. A multi-edge edge synchronization controller, wherein the polygon edge synchronization controller is configured to detect an operating state of the switching power supply, and generate a temporal segment within the effective switching period according to the working state, and generate a pulse width. The control and its edge synchronization timing controllable modulation pulse signal is used to control the operation of the switching unit in the switching power supply. The multilateral edge synchronization controller includes: an AC polarity detecting unit (401) and an overload detecting unit ( ⁴⁰ ) ^2), the power factor detection means ^(403), detecting a DC output feedback means (404), multiple edge sync timing generating unit (405) and a synchronous switch and a driving AC polarity signal synthesis, mapping unit (406); wherein

An AC polarity detecting unit (401) for providing information on size and polarity change of the AC power source; and an overload detecting unit (402) for providing protection of the power carrying capacity;

a power factor detecting unit (403) for providing feedback of power quality factor correction quality; a DC output feedback detecting unit (404) for providing closed-loop feedback of the load power source; a polygon edge synchronization timing generator unit (405), and The AC polarity detecting unit (401), the overload detecting unit (402), the power factor detecting unit (403), and the DC output feedback detecting unit (404) are connected, and receive signals thereof to generate four in an effective switching period. a temporal phase segment (506); an AC polarity synchronization switch and a driving signal synthesis, mapping unit (406) for juxtaposing the polygon edge synchronization timing generator unit and the AC polarity detecting unit (401) and the overload detecting unit The signal of (402), which is used as an input signal, produces a pulse width controllable for the operation of the main switch and the auxiliary switch, and a modulated pulse signal controllable at the edge synchronization timing.

The multilateral edge synchronization controller according to claim 12, wherein the polygon edge timing generator unit comprises: a main switching timing (501) in an effective switching period and an auxiliary switching timing in an effective switching period. ( 502 ), the main switch sync trailing edge ( 503 ), the auxiliary switch sync leading edge ( 504 ), and the auxiliary switch sync trailing edge ( 505 ).

The multi-edge edge synchronization controller according to claim 12, wherein the four time segments (506) of the effective switching period comprise: