Multi-input source full-wave rectifier circuit and its regulating method

Abstract

The application relates to a full-wave rectifier circuit with multiple input sources and a regulating method thereof, wherein the full-wave rectifier circuit comprises at least one main power module, at least one slave power module and at least one additional module. The main power module and the slave power module can independently complete electric energy conversion, and the additional module is used for associating the main power module and the slave power module to work cooperatively. The composite structure makes the regulating method of the whole circuit more diversified, and increases the adjustable property of the output characteristics of the whole circuit.

Description

Technical Field

[0001] This invention relates to full-wave rectifier circuits, and more particularly to full-wave rectifier circuits with multiple input sources. Background Technology

[0002] A rectifier circuit is a circuit that converts alternating current (AC) into direct current (DC), and it is widely used in industries such as power, transportation, metallurgy, petroleum, and chemicals. Among them, the full-wave rectifier circuit is a common type of rectifier circuit, and its main characteristics are: the secondary winding of the transformer needs to be led out with a center tap, and the number of rectifier components required is relatively small.

[0003] With the development of new energy power generation technologies, AC power sources have become increasingly diverse, including not only traditional thermal, hydroelectric, and nuclear power generators, but also wind, solar thermal, tidal, and hydrogen power generators. Multi-input source rectifier circuits have the ability to comprehensively utilize various AC power sources. Currently, most common multi-input source rectifier circuits adopt a "single-phase multi-source" form. That is, a multi-input source rectifier circuit consists of multiple identical and independent single-input source sub-rectifier circuits, with each sub-rectifier circuit having independent input terminals but parallel output terminals. Summary of the Invention

[0004] The "single-phase multi-stage" rectifier circuit has a simple structure, with each sub-rectifier circuit operating independently and exhibiting only a simple decoupling relationship with each other. However, this characteristic of "each sub-rectifier circuit having the same structure and operating independently" sacrifices the possibility of each sub-rectifier circuit working together.

[0005] To overcome the lack of coordination among the sub-rectifier circuits in existing "single-phase multi-stage" rectifier circuits, this invention proposes a multi-input source full-wave rectifier circuit, which also includes an adjustment method to further improve its performance.

[0006] A multi-input source full-wave rectifier circuit according to an embodiment of the present invention includes a main power module, a slave power module, and an auxiliary module. The main power module includes: a first transformer, whose primary winding has two ports for connection to a first AC power source, and whose secondary winding has two ports and a center tap as a first center port, a second center port, and a third center port of the main power module, respectively; a first diode, whose cathode is connected to the first center port of the main power module, and whose anode is connected to the negative terminal of a DC bus or the second terminal of a load; a second diode, whose cathode is connected to the second center port of the main power module, and whose anode is connected to the negative terminal of a DC bus or the second terminal of a load; and a series branch having a first inductor and a third diode, whose current input terminal is connected to the third center port of the main power module, and whose current output terminal is connected to the positive terminal of a DC bus or the first terminal of a load. The power module includes: a second transformer, whose primary winding has two ports for connection to a second AC power source, and whose secondary winding has two ports and a center tap for connection to the first, second, and third intermediate ports of the power module, respectively; a fourth diode, whose cathode is connected to the first intermediate port of the power module, and whose anode is connected to the negative terminal of the DC bus or the second terminal of the load; a fifth diode, whose cathode is connected to the second intermediate port of the power module, and whose anode is connected to the negative terminal of the DC bus or the second terminal of the load; and a series branch having a second inductor and a sixth diode, whose current input terminal is connected to the third intermediate port of the power module, and whose current output terminal is connected to the positive terminal of the DC bus or the first terminal of the load. The additional module includes at least one inductor and diode series branch, wherein: the current input terminal of the inductor and diode series branch is connected to the third intermediate port of the main power module, and its current output terminal is connected to the first intermediate port or the second intermediate port of the slave power module; or, the current input terminal of the inductor and diode series branch is connected to the first intermediate port or the second intermediate port of the main power module, and its current output terminal is connected to the third intermediate port of the slave power module; or, the current input terminal of the inductor and diode series branch is connected to the first intermediate port or the second intermediate port of the main power module, and its current output terminal is connected to the first intermediate port or the second intermediate port of the slave power module.

[0007] This invention also provides a multi-input source full-wave rectifier circuit, including a main power module, a slave power module, and an auxiliary module. The main power module includes: a first transformer, whose primary winding has two ports for connection to a first AC power source, and whose secondary winding has two ports and a center tap, respectively, a first center port, a second center port, and a third center port of the main power module; a first diode, whose anode is connected to the first center port of the main power module, and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; a second diode, whose anode is connected to the second center port of the main power module, and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; and a series branch having a first inductor and a third diode, whose current output terminal is connected to the third center port of the main power module, and whose current input terminal is connected to the negative terminal of the DC bus or the second terminal of the load. The power module includes: a second transformer, whose primary winding has two ports for connection to a second AC power source, and whose secondary winding has two ports and a center tap for connection to the first, second, and third intermediate ports of the power module, respectively; a fourth diode, whose anode is connected to the first intermediate port of the power module and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; a fifth diode, whose anode is connected to the second intermediate port of the power module and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; and a series branch having a second inductor and a sixth diode, whose current output terminal is connected to the third intermediate port of the power module and whose current input terminal is connected to the negative terminal of the DC bus or the second terminal of the load. The additional module includes at least one inductor and diode series branch, wherein: the current input terminal of the inductor and diode series branch is connected to the first or second intermediate port of the main power module, and its current output terminal is connected to the third intermediate port of the slave power module; or, the current input terminal of the inductor and diode series branch is connected to the third intermediate port of the main power module, and its current output terminal is connected to the first or second intermediate port of the slave power module; or, the current input terminal of the inductor and diode series branch is connected to the first or second intermediate port of the main power module, and its current output terminal is connected to the first or second intermediate port of the slave power module.

[0008] This invention further provides a multi-input source full-wave rectifier circuit, including a main power module, a slave power module, and an auxiliary module. The main power module includes: a first transformer, whose primary winding has two ports for connection to a first AC power source, and whose secondary winding has two ports and a center tap, respectively, a first center port, a second center port, and a third center port of the main power module; a first diode, whose anode is connected to the first center port of the main power module, and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; a second diode, whose anode is connected to the second center port of the main power module, and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; and a series branch having a first inductor and a third diode, whose current output terminal is connected to the third center port of the main power module, and whose current input terminal is connected to the negative terminal of the DC bus or the second terminal of the load. The power module includes: a second transformer, whose primary winding has two ports for connection to a second AC power source, and whose secondary winding has two ports and a center tap for connection to the first, second, and third intermediate ports of the power module, respectively; a fourth diode, whose cathode is connected to the first intermediate port of the power module, and whose anode is connected to the negative terminal of the DC bus or the second terminal of the load; a fifth diode, whose cathode is connected to the second intermediate port of the power module, and whose anode is connected to the negative terminal of the DC bus or the second terminal of the load; and a series branch having a second inductor and a sixth diode, whose current input terminal is connected to the third intermediate port of the power module, and whose current output terminal is connected to the positive terminal of the DC bus or the first terminal of the load. The additional module includes at least one inductor and diode series branch, wherein: the current input terminal of the inductor and diode series branch is connected to the first or second intermediate port of the main power module, and its current output terminal is connected to the first or second intermediate port of the slave power module; or, the current input terminal of the inductor and diode series branch is connected to the third intermediate port of the main power module, and its current output terminal is connected to the first or second intermediate port of the slave power module; or, the current input terminal of the inductor and diode series branch is connected to the first or second intermediate port of the main power module, and its current output terminal is connected to the third intermediate port of the slave power module.

[0009] This invention further provides a multi-input source full-wave rectifier circuit, including a main power module, a slave power module, and an auxiliary module. The main power module includes: a first transformer, whose primary winding has two ports for connection to a first AC power source, and whose secondary winding has two ports and a center tap, respectively, a first center port, a second center port, and a third center port of the main power module; a first diode, whose cathode is connected to the first center port of the main power module, and whose anode is connected to the negative terminal of the DC bus or the second terminal of the load; a second diode, whose cathode is connected to the second center port of the main power module, and whose anode is connected to the negative terminal of the DC bus or the second terminal of the load; and a series branch having a first inductor and a third diode, whose current input terminal is connected to the third center port of the main power module, and whose current output terminal is connected to the positive terminal of the DC bus or the first terminal of the load. The power module includes: a second transformer, whose primary winding has two ports for connection to a second AC power source, and whose secondary winding has two ports and a center tap for connection to the first, second, and third intermediate ports of the power module, respectively; a fourth diode, whose anode is connected to the first intermediate port of the power module and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; a fifth diode, whose anode is connected to the second intermediate port of the power module and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; and a series branch having a second inductor and a sixth diode, whose current output terminal is connected to the third intermediate port of the power module and whose current input terminal is connected to the negative terminal of the DC bus or the second terminal of the load. The additional module includes at least one inductor and diode series branch, wherein: the current input terminal of the inductor and diode series branch is connected to the first or second intermediate port of the main power module, and its current output terminal is connected to the first or second intermediate port of the slave power module; or, the current input terminal of the inductor and diode series branch is connected to the third intermediate port of the main power module, and its current output terminal is connected to the first or second intermediate port of the slave power module; or, the current input terminal of the inductor and diode series branch is connected to the first or second intermediate port of the main power module, and its current output terminal is connected to the third intermediate port of the slave power module.

[0010] Based on the above structure, the most basic unit of the multi-input source full-wave rectifier circuit, namely "1 main power module + 1 slave power module + 1 auxiliary module", has multiple combinations. Based on this basic unit, a composite structure of "multiple main power modules + multiple slave power modules + multiple auxiliary modules" can be further realized, including one main power module connected to multiple auxiliary modules, one slave power module connected to multiple auxiliary modules, and combinations of different basic units.

[0011] In some embodiments, some or all of the diodes in the aforementioned rectifier circuit can be replaced by controllable switching devices (e.g., synchronous rectifier MOSFETs). The AC power supply can be a three-level or higher multi-level AC power supply, including a sinusoidal AC power supply.

[0012] This invention also provides an adjustment method applicable to the aforementioned rectifier circuit, comprising any combination of the following steps:

[0013] Step 0: Change the type of add-on module;

[0014] Step 1: Increase or decrease the number of additional modules;

[0015] Step 2: Increase or decrease the number of series branches of inductors and diodes inside the additional module;

[0016] Step 3: Change the inductance value of the internal inductor of the additional module;

[0017] Step 4: Change the operating parameters of the first AC power supply connected to the main power module, such as amplitude, frequency, period, phase, level, pulse width, etc.

[0018] Step 5: Change the operating parameters of the second AC power supply connected to the power module, such as amplitude, frequency, period, phase, level, pulse width, etc.

[0019] The beneficial effects of this invention are mainly reflected in the following: Compared with the existing "single-phase multiple" full-wave rectifier circuit, the multi-input source full-wave rectifier circuit according to the embodiments of this invention includes a main power module, a slave power module, and an auxiliary module. Both the main power module and the slave power module can independently complete power conversion, while the auxiliary module connects the main power module and the slave power module, allowing current to flow between them. This structure makes the adjustment methods of the entire circuit more diversified; that is, changing the type and number of auxiliary modules, changing the number of inductors and diodes in series within the auxiliary modules, and changing the operating parameters of the AC power supply can all adjust the output characteristics of the entire circuit, improving the adjustability of the entire circuit. Attached Figure Description

[0020] Figure 1 This is a circuit diagram of Embodiment 1 of the present invention.

[0021] Figure 2 This is the output power characteristic diagram of Embodiment 1 of the present invention.

[0022] Figure 3 This is a circuit diagram of Embodiment 2 of the present invention.

[0023] Figure 4 This is the output power characteristic diagram of Embodiment 2 of the present invention.

[0024] Figure 5 This is the output current ripple characteristic diagram of Embodiment 2 of the present invention.

[0025] Figure 6 This is a circuit diagram of Embodiment 3 of the present invention.

[0026] Figure 7 This is the output power characteristic diagram of Embodiment 3 of the present invention.

[0027] Figure 8 This is the output current ripple characteristic diagram of Embodiment 3 of the present invention. Detailed Implementation

[0028] The present invention will now be further described with reference to the accompanying drawings. It should be noted that the embodiments described herein are for illustrative purposes only and are not intended to limit the invention. In the following description, numerous specific details are set forth to facilitate a thorough understanding of the invention. However, those skilled in the art will understand that these specific details are not essential for carrying out the invention. Furthermore, in some embodiments, well-known circuits, materials, or methods are not specifically described to avoid obscuring the invention.

[0029] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "in an embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the accompanying drawings provided herein are for illustrative purposes, with the same reference numerals indicating the same elements. It should be understood that when an element is referred to as "connected to" or "coupled" to another element, it can be a direct connection or coupling to the other element, or there may be intermediate elements present.

[0030] Example 1

[0031] refer to Figure 1 A multi-input source full-wave rectifier circuit includes at least one main power module, at least one slave power module, and at least one auxiliary module. In some embodiments, the rectifier circuit includes multiple main power modules, multiple slave power modules, and multiple auxiliary modules, which may have the same structure or different structures.

[0032] The circuit comprises one main power module (M1), one slave power module (S1), and one auxiliary module (J1). The rectifier circuit is connected to the first AC power supply V. AC1The input interface is connected to the second AC power supply. ac1 The input interface and the output port that connects to the DC bus or load.

[0033] The main power module M1 includes a transformer T. 1A Inductor L 1A Diode D 1A Diode D 1B and diode D 1C Transformer T 1A The two ports of the primary winding are connected to the AC power supply V. AC1 Connected, its secondary winding has two ports and a center tap, namely the first center port 1_A, the second center port 1_B, and the third center port 1_C; diode D 1A The cathode is connected to the first intermediate port 1_A, and its anode is connected to the negative terminal V of the DC bus. o - Or connected to the second terminal of the load; diode D 1B The cathode is connected to the second intermediate port 1_B, and its anode is connected to the negative terminal V of the DC bus. o - Or connected to the second terminal of the load; inductor L 1A One end is connected to the third intermediate port 1_C, and the inductor L 1A The other end is connected to diode D 1C The anodes of diodes D are connected. 1C The cathode and the positive terminal of the DC bus V o + Or connect to the first end of the load.

[0034] The power module S1 includes a transformer T 1a Inductor L 1a Diode D 1a Diode D 1b and diode D 1c Transformer T 1a The two ports of the primary winding are connected to the AC power supply V. ac1 Connected, its secondary winding has two ports and a center tap, namely the first center port 1_a, the second center port 1_b, and the third center port 1_c; diode D 1a The cathode is connected to the first intermediate port 1_a, and its anode is connected to the negative terminal V of the DC bus. o - Or connected to the second terminal of the load; diode D 1b The cathode is connected to the second intermediate port 1_b, and its anode is connected to the negative terminal V of the DC bus. o - Or connected to the second terminal of the load; inductor L 1a One end is connected to the third intermediate port 1_c, and the inductor L1a The other end is connected to diode D 1c The anodes of diodes D are connected. 1c The cathode and the positive terminal of the DC bus V o + Or connect to the first end of the load.

[0035] The additional module J1 internally includes two inductor and diode series branches. The first inductor and diode series branch is inductor L. a1 and diode D a1 Formed in series, inductor L a1 One end is connected to the third intermediate port 1_C of the main power module M1, and the inductor L a1 The other end is connected to diode D a1 The anodes of diodes D are connected. a1 The cathode is connected to the first intermediate port 1_a of the power module S1; the second inductor and diode are connected in series via inductor L. b1 and diode D b1 Formed in series, inductor L b1 One end is connected to the third intermediate port 1_C of the main power module M1, and the inductor L b1 The other end is connected to diode D b1 The anodes of diodes D are connected. b1 The cathode is connected to the second intermediate port 1_b of the power module S1. Besides limiting the direction of current, the diodes in J1 also prevent circulating current when the number of series-connected inductor and diode branches is greater than one. The number of series-connected inductor and diode branches in J1 is variable, ranging from 0 to 2.

[0036] For ease of understanding, Figure 1 Only a portion of the entire multi-input source full-wave rectifier circuit is shown—the main power module M1, the slave power module S1, and the auxiliary module J1. Figure 1 Taking the displayed portion as an example, we will focus on the steady-state operation of the master / slave power modules and auxiliary modules working together. When the master / slave power modules work independently, they both operate as typical full-wave rectification processes, so they will not be described in detail here.

[0037] For simplicity, assume that the main power module M1 and the slave power module S1 use the same components, and the transformer T 1A The first port of the primary winding (e.g., connected to AC power supply V) AC1 The positive terminal and its secondary winding port 1_A are related as identical terminals. Transformer T 1a The first port of the primary winding (e.g., connected to AC power supply V) ac1 The positive terminal and its secondary winding port 1_a are related by name, and T is taken as the terminal. 1A The center tap of the secondary winding is the center tap, and T is taken as the center tap.1a The middle tap of the secondary winding is the center tap; the AC power supply v AC1 is a three-level AC power supply (+V AC1 , 0, -V AC1 ), and the AC power supply v ac1 = A·v AC1 (A is a constant), that is, v AC1 and v ac1 have the same frequency, period, phase, and pulse width, but different amplitudes or level values. Taking 0 < A < 1 as an example, it is described as follows. Figure 1 A working cycle T1 of the shown circuit can be divided into 4 stages. A typical working condition is as follows:

[0038] (1) Stage 1: v AC1 = +V AC1

[0039] In the main power module M1: D 1B and D 1C are turned on, D 1A is turned off. (a) v AC1 passes through T 1A and L 1A , D 1C , the DC bus or load, D 1B to form the first loop;

[0040] In the slave power module S1: D 1c is turned on, D 1a and D 1b are turned off;

[0041] In the additional module J1: D b1 is turned on. (b) v AC1 passes through T 1A , v ac1 passes through T 1a and L b1 , D b1 , L 1a , D 1c , the DC bus or load, D 1B to form the second loop; (c) D a1 is turned on until the current i AC1 passing through T 1A , v ac1 passing through T 1a and L a1 , D a1 , L 1a , D 1c , the DC bus or load, D 1B in the third loop formed is zero. a1

[0042] (2) Stage 2: vAC1 =0

[0043] At this time, T 1A and T 1a The secondary sides are all equivalent to short circuits;

[0044] In main power module M1: D 1A and D 1B Conductive, (a)D 1C Conduct until L 1A D 1C DC bus or load, D 1A D 1B The current i in the first loop constituted D1C It is zero, during which time it is determined by D. 1A and D 1B Share i D1C ;

[0045] From power module S1: D 1c Conduction, D 1a and D 1b Deadline;

[0046] In add-on module J1: D b1 Conduction, D a1 As of now, (b)L b1 D b1 L 1a D 1c DC bus or load, D 1A D 1B This forms the second loop, during which D... 1A and D 1B They share the series current i of the second inductor and the diode. b1 .

[0047] (3) Stage 3: v AC1 =-V AC1

[0048] In main power module M1: D 1A and D 1C Conduction, D 1B As of now, (a)v AC1 via T 1A With L 1A D 1C DC bus or load, D 1A This forms the first loop;

[0049] From power module S1: D 1c Conduction, D 1a and D 1b Deadline;

[0050] In add-on module J1: Da1 Conductive, (b)v AC1 via T 1A v ac1 via T 1a With L a1 D a1 L 1a D 1c DC bus or load, D 1A Forming a second loop; (c)D b1 Conduct until v AC1 via T 1A v ac1 via T 1a With L b1 D b1 L 1a D 1c DC bus or load, D 1A The current i in the third loop formed b1 It is zero.

[0051] (4) Stage 4: v AC1 =0

[0052] At this time, T 1A and T 1a The secondary sides are all equivalent to short circuits;

[0053] In main power module M1: D 1A and D 1B Conductive, (a)D 1C Conduct until L 1A D 1C DC bus or load, D 1A D 1B The current i in the first loop constituted D1C It is zero, during which time it is determined by D. 1A and D 1B Share i D1C ;

[0054] From power module S1: D 1c Conduction, D 1a and D 1b Deadline;

[0055] In add-on module J1: D a1 Conduction, D b1 As of now, (b)L a1 D a1 L 1a D 1c DC bus or load, D 1A D 1B This forms the second loop, during which D... 1A and D 1BThey share the series current i of the first inductor and the diode. a1 .

[0056] As can be seen from the above working process, when the main power module M1, the slave power module S1 and the auxiliary module J1 work together, they will combine the electrical energy of the two AC power sources and supply it to the DC bus or load.

[0057] The operation of J1 with one series branch of inductor and diode is similar to that described above and will not be repeated. To facilitate understanding of the impact of the additional module J1 on the output characteristics (mainly output power) of the entire multi-input source full-wave rectifier circuit, assume: V AC1 =20V, v AC1 The period T1 = 90 μs, v AC1 +V AC1 Pulse width is T1 / 4, v AC1 -V AC1 The pulse width is also T1 / 4, T 1A and T 1a The primary and secondary turns ratios are both 1:2:2, the coupling coefficient is 0.999, and the DC bus voltage V o =20V. Let's take three cases for further explanation. Case 1: A = 0.5V; Case 2: A = 0.75V; Case 3: A = 1V.

[0058] Take L a1 =L b1 =L 1A =L 1a =300μH, Figure 2 The output power performance of Embodiment 1 of the present invention is given under the above three conditions. Figure 2 It can be seen that (i) the presence or absence of the additional module J1 ("absence" is equivalent to the case where the number of its internal inductors and diodes in series is 0) affects the output power of Embodiment 1; (ii) when the additional module J1 is present, the number of its internal inductors and diodes in series affects the output power of Embodiment 1; (iii) AC power supply v AC1 and v ac1 The amplitude difference or level difference also affects the output power of Example 1.

[0059] In addition, the inductance value of the internal inductor of the additional module J1 also affects the output characteristics (including output power and output current ripple) of the entire multi-input source full-wave rectifier circuit.

[0060] Taking advantage of the above characteristics, the adjustment method of Example 1 includes any combination of the following steps:

[0061] Step 1: Increase or decrease the number of additional modules J1 (from 0 to 1);

[0062] Step 2: Increase or decrease the number of series branches of inductors and diodes inside the additional module (0 to 2);

[0063] Step 3: Change the inductance value (L) of the internal inductor of the additional module. a1 and / or L b1 );

[0064] Step 4: Change the AC power supply connected to the main power module M1. AC1 amplitude or level value (V) AC1 );

[0065] Step 5: Change the AC power supply connected to the power module S1. ac1 amplitude or level value (A*V) AC1 ).

[0066] Example 2

[0067] refer to Figure 3 A multi-input source full-wave rectifier circuit includes at least one main power module, at least one slave power module, and at least one auxiliary module. The main power module is M1, the slave power module is S1, and the auxiliary module is J1.

[0068] The main power module M1 includes a transformer T. 2A Inductor L 2A Diode D 2A Diode D 2B and diode D 2C Transformer T 2A The two ports of the primary winding are connected to the AC power supply V. AC1 Connected, its secondary winding has two ports and a center tap, namely the first center port 1_A, the second center port 1_B, and the third center port 1_C; diode D 2A The anode is connected to the first intermediate port 1_A, and its cathode is connected to the positive terminal V of the DC bus. o + Or connected to the first terminal of the load; diode D 2B The anode is connected to the second intermediate port 1_B, and its cathode is connected to the positive terminal V of the DC bus. o + Or connected to the first terminal of the load; inductor L 2A One end is connected to the third intermediate port 1_C, and the inductor L 2A The other end is connected to diode D 2C The cathodes are connected, and diode D 2C The anode and the negative terminal of the DC bus V o - Or connect to the second end of the load.

[0069] The power module S1 includes a transformer T 2a Inductor L 2a Diode D 2a Diode D 2b and diode D 2c Transformer T 2a The two ports of the primary winding are connected to the AC power supply V. ac1 Connected, its secondary winding has two ports and a center tap, namely the first center port 1_a, the second center port 1_b, and the third center port 1_c; diode D 2a The anode is connected to the first intermediate port 1_a, and its cathode is connected to the positive terminal V of the DC bus. o + Or connected to the first terminal of the load; diode D 2b The anode is connected to the second intermediate port 1_b, and its cathode is connected to the positive terminal V of the DC bus. o + Or connected to the first terminal of the load; inductor L 2a One end is connected to the third intermediate port 1_c, and the inductor L 2a The other end is connected to diode D 2c The cathodes are connected, and diode D 2c The anode and the negative terminal of the DC bus V o - Or connect to the second end of the load.

[0070] The additional module J1 includes two inductor and diode series branches. The first inductor and diode series branch is inductor L. a2 and diode D a2 Formed in series, inductor L a2 One end is connected to the first intermediate port 1_A of the main power module M1, and the inductor L a2 The other end is connected to diode D a2 The anodes of diodes D are connected. a2 The cathode is connected to the third intermediate port 1_c of the power module S1; the second inductor and diode are connected in series via inductor L. b2 and diode D b2 Formed in series, inductor L b2 One end is connected to the second intermediate port 1_B of the main power module M1, and the inductor L b2 The other end is connected to diode D b2 The anodes of diodes D are connected. b2 The cathode is connected to the third intermediate port 1_c of the power module S1. Besides limiting the direction of current, the diodes in J1 also prevent circulating current when the number of inductor-diode series branches is greater than one. The number of inductor-diode series branches in J1 is variable, ranging from 0 to 2.

[0071] For ease of understanding, Figure 3 Only a portion of the entire multi-input source full-wave rectifier circuit is shown—the main power module M1, the slave power module S1, and the auxiliary module J1. Figure 3 Taking the displayed portion as an example, we will focus on the steady-state operation of the master / slave power modules and auxiliary modules working together. When the master / slave power modules work independently, they both operate as typical full-wave rectification processes, so they will not be described in detail here.

[0072] For simplicity, we will still assume that the main power module M1 and the slave power module S1 use the same components, and the transformer T 2A The first port of the primary winding and its secondary winding port 1_A are related by name. Transformer T 2a The first port of the primary winding and its secondary winding port 1_a are related by name. Take T... 2A The center tap of the secondary winding is the center tap, and T is taken as the center tap. 2a The center tap of the secondary winding is the center tap; AC power supply V AC1 A three-level AC power supply (+V) AC1 , 0, -V AC1 The period is T1; the AC power supply is V. ac1 (t)=v AC1 (tB*T1), i.e., v AC1 and v ac1 The amplitude or level value, frequency, period, and pulse width are all the same, but the initial phase is different. This will be illustrated using B = 1 / 4 as an example. Figure 3 One operating cycle T1 of the circuit shown can be divided into 4 stages, and a typical operating condition is as follows:

[0073] (1) Stage 1: v AC1 =+V AC1 &v ac1 =0

[0074] At this time, T 2a The secondary side is equivalent to a short circuit;

[0075] In main power module M1: D 2A and D 2C Conduction, D 2B As of now, (a)v AC1 via T 2A With D 2A DC bus or load, D 2C L 2A This forms the first loop;

[0076] From power module S1: D 2a and D 2b Conductive, (b)D 2c Conduct until L2a D 2a D 2b DC bus or load, D 2c The current i in the second loop formed D2c The value is zero, during which period D 2a and D 2b Share i D2c ;

[0077] In add-on module J1: D a2 Conduction, (c)v AC1 via T 2A With L a2 D a2 D 2a D 2b DC bus or load, D 2C L 2A This forms the third loop, during which D 2a and D 2b They share the series current i of the first inductor and the diode. a2 ;(d)D b2 Conduct until v AC1 via T 2A With L b2 D b2 D 2a D 2b DC bus or load, D 2C L 2A The current i in the fourth loop formed b2 The value is zero, during which period D 2a and D 2b Share i b2 .

[0078] (2) Stage 2: v AC1 =0&v ac1 =+V AC1

[0079] At this time, T 2A The secondary side is equivalent to a short circuit;

[0080] In main power module M1: D 2C Conductive, (a)D 2A Conduct until L 2A D 2A DC bus or load, D 2C The current i in the first loop constituted D2A (b)D is zero; 2B Conduct until L 2A D 2B DC bus or load, D 2C The current i in the second circuit formedD2B It is zero;

[0081] From power module S1: D 2a and D 2c Conduction, D 2b As of now, (c)v ac1 via T 2a With D 2a DC bus or load, D 2c L 2a This forms the third loop;

[0082] In add-on module J1: D a2 and D b2 Conduction, (d)v ac1 via T 2a With L a2 D a2 D 2a DC bus or load, D 2C L 2A This forms the fourth loop; (e)v ac1 via T 2a With L b2 D b2 D 2a DC bus or load, D 2C L 2A This forms the fifth loop.

[0083] (3) Stage 3: v AC1 =-V AC1 &v ac1 =0

[0084] At this time, T 2a The secondary side is equivalent to a short circuit;

[0085] In main power module M1: D 2B and D 2C Conduction, D 2A As of now, (a)v AC1 via T 2A With D 2B DC bus or load, D 2C L 2A This forms the first loop;

[0086] From power module S1: D 2a and D 2b Conductive, (b)D 2c Conduct until L 2a D 2a D 2b DC bus or load, D 2c The current i in the second loop formed D2c The value is zero, during which period D2a and D 2b Share i D2c ;

[0087] In add-on module J1: D b2 Conduction, (c)v AC1 via T 2A With L b2 D b2 D 2a D 2b DC bus or load, D 2C L 2A This forms the third loop, during which D 2a and D 2b They share the series current i of the second inductor and the diode. b2 ;(d)D a2 Conduct until v AC1 via T 2A With L a2 D a2 D 2a D 2b DC bus or load, D 2C L 2A The current i in the fourth loop formed a2 The value is zero, during which period D 2a and D 2b Share i a2 .

[0088] (4) Stage 4: v AC1 =0&v ac1 =-V AC1

[0089] At this time, T 2A The secondary side is equivalent to a short circuit;

[0090] In main power module M1: D 2C Conductive, (a)D 2A Conduct until L 2A D 2A DC bus or load, D 2C The current i in the first loop formed D2A (b)D is zero; 2B Conduct until L 2A D 2B DC bus or load, D 2C The current i in the second loop formed D2B It is zero;

[0091] From power module S1: D 2b and D 2c Conduction, D 2a As of now, (c)vac1 via T 2a With D 2b DC bus or load, D 2c L 2a This forms the third loop;

[0092] In add-on module J1: D a2 and D b2 Conduction, (d)v ac1 via T 2a With L a2 D a2 D 2b DC bus or load, D 2C L 2A This forms the fourth loop; (e)v ac1 via T 2a With L b2 D b2 D 2b DC bus or load, D 2C L 2A This forms the fifth loop.

[0093] As can be seen from the above working process, when the main power module M1, the slave power module S1 and the auxiliary module J1 work together, they will alternately convert the electrical energy of the two AC power sources and supply it to the DC bus or load.

[0094] The operation of J1 with one series branch of inductor and diode is similar to that described above and will not be repeated. To facilitate understanding of the impact of the additional module J1 on the output characteristics (mainly output power and output current ripple) of the entire multi-input source full-wave rectifier circuit, assume: V AC1 =20V, v AC1 The period T1 = 90 μs, v AC1 +V AC1 Pulse width is T1 / 4, v AC1 -V AC1 The pulse width is also T1 / 4, T 2A and T 2a The primary and secondary turns ratios are both 1:2:2, the coupling coefficient is 0.999, and the DC bus voltage V o =20V. Let's take three cases for further explanation. Case 1: B = 0; Case 2: B = 1 / 8; Case 3: B = 1 / 4.

[0095] Take L a2 =L b2 =L 2A =L 2a =300μH, Figure 4 The above three scenarios provide an example of the output power performance of Embodiment 2 of the present invention. Figure 5The output current ripple performance of Embodiment 2 of the present invention is given under the above three conditions. Figure 4 and Figure 5 It can be seen that (i) the presence or absence of the additional module J1 ("absence" is equivalent to the case where the number of its internal inductors and diodes in series is 0) affects both the output power and output current ripple of Embodiment 2; (ii) when the additional module J1 is present, the number of its internal inductors and diodes in series affects both the output power and output current ripple of Embodiment 2; (iii) AC power supply v AC1 and v ac1 The phase difference also affects the output power and output current ripple of Example 2.

[0096] In addition, the inductance value of the internal inductor of the additional module J1 also affects the output characteristics (including output power and output current ripple) of the entire multi-input source full-wave rectifier circuit.

[0097] Taking advantage of the above characteristics, the adjustment method of Example 2 includes any combination of the following steps:

[0098] Step 1: Increase or decrease the number of additional modules J1 (from 0 to 1);

[0099] Step 2: Increase or decrease the number of series branches of inductors and diodes in the additional module (0 to 2); Step 3: Change the inductance value of the internal inductor of the additional module (L). a2 and / or L b2 );

[0100] Step 4: Change the AC power supply connected to the main power module M1. AC1 Step 5: Change the phase of the AC power supply connected to the power module S1; ac1 The phase (B*T1).

[0101] Example 3

[0102] refer to Figure 6 A multi-input source full-wave rectifier circuit includes at least one main power module, at least one slave power module, and at least one auxiliary module.

[0103] Among them, there is one main power module M1, one slave power module S1, and one auxiliary module J1.

[0104] The main power module M1 is the same as that in Embodiment 2.

[0105] The power module S1 is the same as in Embodiment 1.

[0106] The additional module J1 includes four inductor and diode series branches. The first inductor and diode series branch is inductor L.a3 and diode D a3 Formed in series, inductor L a3 One end is connected to the first intermediate port 1_A of M1, and the inductor L a3 The other end is connected to diode D a3 The anodes of diodes D are connected. a3 The cathode is connected to the first intermediate port 1_a of S1; the second inductor and diode are connected in series via inductor L. b3 and diode D b3 Formed in series, inductor L b3 One end is connected to the first intermediate port 1_A of M1, and the inductor L b3 The other end is connected to diode D b3 The anodes of diodes D are connected. b3 The cathode is connected to the second intermediate port 1_b of S1; the third inductor and diode are connected in series via inductor L. c3 and diode D c3 Formed in series, inductor L c3 One end is connected to the second intermediate port 1_B of M1, and the inductor L c3 The other end is connected to diode D c3 The anodes of diodes D are connected. c3 The cathode is connected to the first intermediate port 1_a of S1; the fourth inductor and diode are connected in series via inductor L. d3 and diode D d3 Formed in series, inductor L d3 One end is connected to the second intermediate port 1_B of M1, and the inductor L d3 The other end is connected to diode D d3 The anodes of diodes D are connected. d3 The cathode of J1 is connected to the second intermediate port 1_b of S1. Besides limiting the direction of current, the diode in J1 also prevents circulating current when the number of series branches of the inductor and diode is greater than one. The number of series branches of the inductor and diode in J1 is variable, ranging from 0 to 4.

[0107] For ease of understanding, Figure 6 Only a portion of the entire multi-input source full-wave rectifier circuit is shown—the main power module M1, the slave power module S1, and the auxiliary module J1. Figure 6 Taking the displayed portion as an example, we will focus on the steady-state operation of the master / slave power modules and auxiliary modules working together. When the master / slave power modules work independently, they both operate as typical full-wave rectification processes, so they will not be described in detail here.

[0108] For simplicity, we will still assume that the main power module M1 and the slave power module S1 use the same components, and the transformer T 2AThe first port of the primary winding and its secondary winding port 1_A are related by name. Transformer T 1a The first port of the primary winding and its secondary winding port 1_a are related by name. Take T... 2A The center tap of the secondary winding is the center tap, and T is taken as the center tap. 1a The center tap of the secondary winding is the center tap; AC power supply V AC1 A three-level AC power supply (+V) AC1 , 0, -V AC1 The period is T1, and the AC power supply is v. ac1 (t)=v AC1 (a·t), i.e., v AC1 and v ac1 The amplitude or level value, initial phase, and pulse width ratio are the same, but the frequency and period are different. This will be illustrated using a=2 as an example. Figure 6 One operating cycle T1 of the circuit shown can be divided into 8 stages, and a typical operating condition is as follows:

[0109] (1) Stage 1: v AC1 =+V AC1 &v ac1 =+V AC1

[0110] In main power module M1: D 2A and D 2C Conduction, D 2B As of now, (a)v AC1 via T 2A With D 2A DC bus and load, D 2C L 2A This forms the first loop;

[0111] From power module S1: D 1b and D 1c Conduction, D 1a As of now, (b)v ac1 via T 1a With L 1a D 1c DC bus or load, D 1b This forms the second loop;

[0112] In add-on module J1: D b3 Conduction, (c)v AC1 via T 2A v ac1 via T 1a With L b3 D b3 L 1a D 1c DC bus or load, D2C L 2A This forms the third loop; (d)D a3 Conduct until v AC1 via T 2A v ac1 via T 1a With L a3 D a3 L 1a D 1c DC bus or load, D 2C L 2A The current i in the fourth loop formed a3 =Zero; (e)D c3 Conduct until v AC1 via T 2A v ac1 via T 1a With L c3 D c3 L 1a D 1c DC bus or load, D 2C L 2A The current i in the fifth loop formed c3 =Zero; (f)D d3 Conduct until v AC1 via T 2A v ac1 via T 1a With L d3 D d3 L 1a D 1c DC bus or load, D 2C L 2A The current i in the 6th loop formed d3 It is zero.

[0113] (2) Stage 2: v AC1 =+V AC1 &v ac1 =0

[0114] At this time, T 1a The secondary side is equivalent to a short circuit;

[0115] In main power module M1: D 2A and D 2C Conduction, D 2B As of now, (a)v AC1 via T 2A With D 2A DC bus or load, D 2C L 2A This forms the first loop;

[0116] From power module S1: D 1a D 1b and D 1c Conductive, (b)L 1a D 1c DC bus or load, D 1a D 1b The second loop is formed, during which the current in the second loop is controlled by D. 1a and D 1b Share the burden;

[0117] In add-on module J1: D a3 and D b3 Conduction, D c3 and D d3 As of now, (c)v AC1 via T 2A With L a3 D a3 L 1a D 1c DC bus or load, D 2C L 2A This forms the third loop; (d)v AC1 via T 2A With L b3 D b3 L 1a D 1c DC bus or load, D 2C L 2A This forms the fourth loop.

[0118] (3) Stage 3: v AC1 =0&v ac1 =-V AC1

[0119] At this time, T 2A The secondary side is equivalent to a short circuit;

[0120] In main power module M1: D 2A D 2B and D 2C Conduction, (a)L 2A D 2A D 2B DC bus or load, D 2C The first loop is formed, during which the current in the first loop is controlled by D. 2A and D 2B Share the burden;

[0121] From power module S1: D 1a and D 1c Conduction, D 1b As of now, (b)v ac1 via T1a With L 1a D 1c DC bus or load, D 1a This forms the second loop;

[0122] In add-on module J1: D a3 and D c3 Conduction, D d3 As of now, (c)v ac1 via T 1a With L a3 D a3 L 1a D 1c DC bus or load, D 2C L 2A This forms the third loop; (d)v ac1 via T 1a With L c3 D c3 L 1a D 1c DC bus or load, D 2C L 2A This forms the fourth loop; (e)D b3 Conduct until v ac1 via T 1a With L b3 D b3 L 1a D 1c DC bus or load, D 2C L 2A The current i in the fifth loop formed b3 It is zero.

[0123] (4) Stage 4: v AC1 =0&v ac1 =0

[0124] At this time, T 2A Secondary side and T 1a The secondary sides are all equivalent to short circuits;

[0125] In main power module M1: D 2C Conductive, (a)D 2A Conduct until L 2A D 2A DC bus or load, D 2C The current i in the first loop formed D2A (b)D is zero; 2B Conduct until L 2A D 2B DC bus or load, D 2C The current i in the second loop formed D2B It is zero;

[0126] From power module S1: D 1c Conductive, (c)D 1a Conduct until L 1a D 1c DC bus or load, D 1a The current i in the third loop formed D1a =Zero; (d)D 1b Conduct until L 1a D 1c DC bus or load, D 1b The current i in the fourth loop formed D1b It is zero;

[0127] In add-on module J1: D a3 D b3 D c3 D d3 On, (e)L a3 D a3 L 1a D 1c DC bus or load, D 2C L 2A This forms the 5th loop; (f)L b3 D b3 L 1a D 1c DC bus or load, D 2C L 2A Forming the 6th loop; (g)L c3 D c3 L 1a D 1c DC bus or load, D 2C L 2A This forms the 7th loop; (h)L d3 D d3 L 1a D 1c DC bus or load, D 2C L 2A This forms the 8th loop.

[0128] (5) Stage 5: v AC1 =-V AC1 &v ac1 =+V AC1

[0129] In main power module M1: D 2B and D 2C Conduction, D 2A As of now, (a)v AC1 via T 2A With D2B DC bus or load, D 2C L 2A This forms the first loop;

[0130] From power module S1: D 1b and D 1c Conduction, D 1a As of now, (b)v ac1 via T 1a With L 1a D 1c DC bus or load, D 1b This forms the second loop;

[0131] In add-on module J1: D d3 Conduction, (c)v AC1 via T 2A v ac1 via T 1a With L d3 D d3 L 1a D 1c DC bus or load, D 2C L 2A This forms the third loop; (d)D a3 Conduct until v AC1 via T 2A v ac1 via T 1a With L a3 D a3 L 1a D 1c DC bus or load, D 2C L 2A The current i in the fourth loop formed a3 =Zero; (e)D b3 Conduct until v AC1 via T 2A v ac1 via T 1a With L b3 D b3 L 1a D 1c DC bus or load, D 2C L 2A The current i in the fifth loop formed b3 =Zero; (f)D c3 Conduct until v AC1 via T 2A v ac1 via T 1a With L c3 D c3 L 1a D1c DC bus or load, D 2C L 2A The current i in the 6th loop formed c3 It is zero.

[0132] (6) Stage 6: v AC1 =-V AC1 &v ac1 =0

[0133] At this time, T 1a The secondary side is equivalent to a short circuit;

[0134] In main power module M1: D 2B and D 2C Conduction, D 2A As of now, (a)v AC1 via T 2A With D 2B DC bus or load, D 2C L 2A This forms the first loop;

[0135] From power module S1: D 1a D 1b and D 1c Conductive, (b)L 1a D 1c DC bus or load, D 1a D 1b The second loop is formed, during which the current in the second loop is controlled by D. 1a and D 1b Share the burden;

[0136] In add-on module J1: D c3 and D d3 Conduction, D a3 and D b3 As of now, (c)v AC1 via T 2A With L c3 D c3 L 1a D 1c DC bus or load, D 2C L 2A This forms the third loop; (d)v AC1 via T 2A With L d3 D d3 L 1a D 1c DC bus or load, D 2C L 2A This forms the fourth loop.

[0137] (7) Stage 7: vAC1 =0&v ac1 =-V AC1

[0138] At this time, T 2A The secondary side is equivalent to a short circuit;

[0139] In main power module M1: D 2A D 2B and D 2C Conduction, (a)L 2A D 2A D 2B DC bus or load, D 2C The first loop is formed, during which the current in the first loop is controlled by D. 2A and D 2B Share the burden;

[0140] From power module S1: D 1a and D 1c Conduction, D 1b As of now, (b)v ac1 via T 1a With L 1a D 1c DC bus or load, D 1a This forms the second loop;

[0141] In add-on module J1: D a3 and D c3 Conduction, D b3 As of now, (c)v ac1 via T 1a With L a3 D a3 L 1a D 1c DC bus or load, D 2C L 2A This forms the third loop; (d)v ac1 via T 1a With L c3 D c3 L 1a D 1c DC bus or load, D 2C L 2A This forms the fourth loop; (e)D d3 Conduct until v ac1 via T 1a With L d3 D d3 L 1a D 1c DC bus or load, D 2C L 2A The current i in the fifth loop formedd3 It is zero.

[0142] (8) Stage 8: v AC1 =0&v ac1 =0

[0143] At this time, T 2A Secondary side and T 1a The secondary sides are all equivalent to short circuits;

[0144] In main power module M1: D 2C Conductive, (a)D 2A Conduct until L 2A D 2A DC bus or load, D 2C The current i in the first loop formed D2A (b)D is zero; 2B Conduct until L 2A D 2B DC bus or load, D 2C The current i in the second loop formed D2B It is zero;

[0145] From power module S1: D 1c Conductive, (c)D 1a Conduct until L 1a D 1c DC bus or load, D 1a The current i in the third loop formed D1a =Zero; (d)D 1b Conduct until L 1a D 1c DC bus or load, D 1b The current i in the fourth loop formed D1b It is zero;

[0146] In add-on module J1: D a3 D b3 D c3 D d3 On, (e)L a3 D a3 L 1a D 1c DC bus or load, D 2C L 2A This forms the 5th loop; (f)L b3 D b3 L 1a D 1c DC bus or load, D 2C L 2A Forming the 6th loop; (g)L c3 Dc3 L 1a D 1c DC bus or load, D 2C L 2A This forms the 7th loop; (h)L d3 D d3 L 1a D 1c DC bus or load, D 2C L 2A This forms the 8th loop.

[0147] As can be seen from the above working process, when the main power module M1, the slave power module S1 and the auxiliary module J1 work together, they will convert the electrical energy of the two AC power sources into power for the DC bus or load in an alternating and joint manner.

[0148] The operation of the inductor and diode series branches 1 to 3 in J1 is similar to that described above and will not be repeated. To facilitate understanding of the impact of the additional module J1 on the output characteristics (mainly output power and output current ripple) of the entire multi-input source full-wave rectifier circuit, assume: V AC1 =20V, v AC1 The period T1 = 90 μs, v AC1 +V AC1 Pulse width is T1 / 4, v AC1 -V AC1 The pulse width is also T1 / 4, T 2A and T 1a The primary and secondary turns ratios are both 1:2:2, the coupling coefficient is 0.999, and the DC bus voltage V o =20V. Two cases will be considered for further explanation. Case 1: a = 2; Case 2: a = 1.

[0149] Take L a3 =L b3 =L c3 =L d3 =L 2A =L 1a =300μH, Figure 7 The above two scenarios provide an output power performance of Embodiment 3 of the present invention. Figure 8 The output current ripple performance of Embodiment 3 of the present invention is given under the above two conditions. Figure 7 and Figure 8 It can be seen that (i) the presence or absence of the additional module J1 ("absence" is equivalent to the case where the number of series branches of its internal inductors and diodes is 0) affects both the output power and output current ripple of Embodiment 3; (ii) the number of series branches of inductors and diodes inside the additional module J1 affects both the output power and output current ripple of Embodiment 3; (iii) AC power supply vAC1 and v ac1 The frequency difference or period difference also affects the output power and output current ripple of Example 3.

[0150] In addition, the inductance value of the internal inductor of the additional module also affects the output characteristics (including output power and output current ripple) of the entire multi-input source full-wave rectifier circuit.

[0151] Taking advantage of the above characteristics, the adjustment method of Example 3 includes any combination of the following steps:

[0152] Step 1: Increase or decrease the number of additional modules J1 (from 0 to 1);

[0153] Step 2: Increase or decrease the number of series branches of inductors and diodes in the additional module (0 to 4); Step 3: Change the inductance value (L) of the internal inductor of the additional module. a3 and / or L b3 and / or L c3 and / or L d3 Step 4: Change the AC power supply connected to the main power module M1. AC1 The frequency or period (T1); Step 5: Change the AC power supply v connected to the power module S1. ac1 The frequency or period (T1 / a).

[0154] Example 4

[0155] A multi-input source full-wave rectifier circuit includes at least one main power module, at least one slave power module, and at least one auxiliary module.

[0156] Among them, there is one main power module M1, one slave power module S1, and one auxiliary module J1.

[0157] The main power module M1 is the same as that in Embodiment 1.

[0158] The power module S1 is the same as in Embodiment 2.

[0159] The additional module J1 is the same as that in Embodiment 3.

[0160] Structurally, Embodiment 4 and Embodiment 3 can be considered reciprocal. Their working principles are equivalent and their effects are identical, so further details are omitted.

[0161] The adjustment method suitable for Example 3 is also suitable for Example 4.

[0162] Furthermore, Implementation 4 may also employ the same additional modules as Implementation 1 or Implementation 2.

[0163] As described above, both the main power module and the slave power module have two structures, while the auxiliary module also has three structures (see the auxiliary modules in Embodiments 1, 2, and 3). With simple permutations and combinations, at least 12 embodiments can be formed. Typical embodiments 1 to 4 are selected for illustration and explanation; the remaining embodiments, due to their largely similar working principles, will not be enumerated or elaborated upon.

[0164] Although diodes are used for freewheeling and energy transfer on the secondary side of each transformer in the foregoing embodiments, those skilled in the art will understand that the diodes can also be replaced by controllable switching devices (e.g., synchronous rectifier MOSFETs). Furthermore, the AC power supply in the foregoing embodiments can be an AC-AC, DC-AC, or other AC-output power (electronic) device; they can be from the same source or different sources. The transformer parameters (e.g., number of turns on the primary and secondary sides, magnetizing inductance, relationship between the same and different terminals, position of the intermediate tap, etc.) in the main power module and the slave power module can be the same or different. The number, component composition, and connection method of the series branches of inductors and diodes in the additional modules can be selected and adjusted according to the specific application. In addition to the series-connected inductors and diodes, the aforementioned series branches of inductors and diodes can also include other types of components or combinations of components; these variations do not exceed the protection scope of this invention. The embodiments described in this specification are merely examples of implementation forms of the inventive concept; the protection scope of this invention should not be considered as limited to the specific forms stated in the embodiments, and the protection scope of this invention also extends to equivalent technical means that those skilled in the art can conceive of based on the inventive concept.

Claims

1. A multi-input source full-wave rectifier circuit, comprising a main power module, a slave power module, and an auxiliary module; wherein: The main power module includes: The first transformer has two ports of its primary winding for connection to the first AC power source, and two ports of its secondary winding and the intermediate tap are respectively the first intermediate port, the second intermediate port and the third intermediate port of the main power module. The first diode has its cathode connected to the first intermediate port of the main power module, and its anode is used to connect to the negative terminal of the DC bus or the second terminal of the load. The second diode has its cathode connected to the second intermediate port of the main power module, and its anode is used to connect to the negative terminal of the DC bus or the second terminal of the load; and A series branch with a first inductor and a third diode has its current input terminal connected to the third intermediate port of the main power module, and its current output terminal is used to connect to the positive terminal of the DC bus or the first terminal of the load. The power module includes: The second transformer has two ports of its primary winding for connection to the second AC power supply, and two ports of its secondary winding and the intermediate tap are respectively from the first intermediate port, the second intermediate port and the third intermediate port of the power module. The fourth diode has its cathode connected to the first intermediate port of the power module, and its anode is used to connect to the negative terminal of the DC bus or the second terminal of the load. The fifth diode has its cathode connected to the second intermediate port of the power module, and its anode is used to connect to the negative terminal of the DC bus or the second terminal of the load; and A series branch with a second inductor and a sixth diode has its current input terminal connected to the third intermediate port of the power module, and its current output terminal is used to connect to the positive terminal of the DC bus or the first terminal of the load. The additional module includes at least one inductor and diode series branch, wherein: The current input terminal of the inductor and diode series branch is connected to the third intermediate port of the main power module, and the current output terminal is connected to the first or second intermediate port of the slave power module. Alternatively, the inductor and diode series branch has its current input terminal connected to the first or second intermediate port of the main power module, and its current output terminal connected to the third intermediate port of the slave power module. Alternatively, the inductor and diode series branch has its current input terminal connected to the first or second intermediate port of the main power module, and its current output terminal connected to the first or second intermediate port of the slave power module.

2. The multi-input source full-wave rectifier circuit as described in claim 1, wherein the additional module includes a first inductor and diode series branch and a second inductor and diode series branch, wherein the current input terminals of the first inductor and diode series branch and the second inductor and diode series branch are connected to the third intermediate port of the main power module, the current output terminal of the first inductor and diode series branch is connected to the first intermediate port of the slave power module, and the current output terminal of the second inductor and diode series branch is connected to the second intermediate port of the slave power module.

3. A multi-input source full-wave rectifier circuit, comprising a main power module, a slave power module, and an auxiliary module; wherein: The main power module includes: The first transformer has two ports of its primary winding for connection to the first AC power source, and two ports of its secondary winding and the intermediate tap are respectively the first intermediate port, the second intermediate port and the third intermediate port of the main power module. The first diode has its anode connected to the first intermediate port of the main power module, and its cathode is used to connect to the positive terminal of the DC bus or the first terminal of the load. The second diode has its anode connected to the second intermediate port of the main power module, and its cathode connected to the positive terminal of the DC bus or the first terminal of the load; and A series branch with a first inductor and a third diode has its current output terminal connected to the third intermediate port of the main power module, and its current input terminal is used to connect to the negative terminal of the DC bus or the second terminal of the load. The power module includes: The second transformer has two ports of its primary winding for connection to the second AC power supply, and two ports of its secondary winding and the intermediate tap are respectively from the first intermediate port, the second intermediate port and the third intermediate port of the power module. The fourth diode has its anode connected to the first intermediate port of the power module and its cathode connected to the positive terminal of the DC bus or the first terminal of the load. The fifth diode, whose anode is connected to the second intermediate port of the power module, and whose cathode is used to connect to the positive terminal of the DC bus or the first terminal of the load; and A series branch with a second inductor and a sixth diode has its current output terminal connected to the third intermediate port of the power module, and its current input terminal is used to connect to the negative terminal of the DC bus or the second terminal of the load. The additional module includes at least one inductor and diode series branch, wherein: The current input terminal of the inductor and diode series branch is connected to the first or second intermediate port of the main power module, and its current output terminal is connected to the third intermediate port of the slave power module. Alternatively, the inductor and diode series branch has its current input terminal connected to the third intermediate port of the main power module, and its current output terminal connected to the first or second intermediate port of the slave power module. Alternatively, the inductor and diode series branch has its current input terminal connected to the first or second intermediate port of the main power module, and its current output terminal connected to the first or second intermediate port of the slave power module.

4. The multi-input source full-wave rectifier circuit as described in claim 3, wherein the additional module includes a first inductor and diode series branch and a second inductor and diode series branch, wherein the current input terminal of the first inductor and diode series branch is connected to the first intermediate port of the main power module, the current input terminal of the second inductor and diode series branch is connected to the second intermediate port of the main power module, and the current output terminals of the first inductor and diode series branch and the second inductor and diode series branch are connected to the third intermediate port of the slave power module.

5. A multi-input source full-wave rectifier circuit, comprising a main power module, a slave power module, and an auxiliary module; wherein: The main power module includes: The first transformer has two ports of its primary winding for connection to the first AC power source, and two ports of its secondary winding and the intermediate tap are respectively the first intermediate port, the second intermediate port and the third intermediate port of the main power module. The first diode has its anode connected to the first intermediate port of the main power module, and its cathode is used to connect to the positive terminal of the DC bus or the first terminal of the load. The anode of the second diode is connected to the second intermediate port of the main power module. Its cathode is used to connect to the positive terminal of the DC bus or the first terminal of the load; and A series branch with a first inductor and a third diode has its current output terminal connected to the third intermediate port of the main power module, and its current input terminal is used to connect to the negative terminal of the DC bus or the second terminal of the load. The power module includes: The second transformer has two ports of its primary winding for connection to the second AC power supply, and two ports of its secondary winding and the intermediate tap are respectively from the first intermediate port, the second intermediate port and the third intermediate port of the power module. The fourth diode has its cathode connected to the first intermediate port of the power module, and its anode is used to connect to the negative terminal of the DC bus or the second terminal of the load. The fifth diode has its cathode connected to the second intermediate port of the power module, and its anode is used to connect to the negative terminal of the DC bus or the second terminal of the load; and A series branch with a second inductor and a sixth diode has its current input terminal connected to the third intermediate port of the power module, and its current output terminal is used to connect to the positive terminal of the DC bus or the first terminal of the load. The additional module includes at least one inductor and diode series branch, wherein: The inductor and diode series branch has its current input terminal connected to the first intermediate port or the second intermediate port of the main power module, and its current output terminal connected to the first intermediate port or the second intermediate port of the slave power module. Alternatively, the inductor and diode series branch has its current input terminal connected to the first or second intermediate port of the main power module, and its current output terminal connected to the third intermediate port of the slave power module. Alternatively, the inductor and diode series branch has its current input terminal connected to the third intermediate port of the main power module, and its current output terminal connected to the first or second intermediate port of the slave power module.

6. The multi-input source full-wave rectifier circuit as described in claim 5, wherein the additional module includes a first inductor and diode series branch, a second inductor and diode series branch, a third inductor and diode series branch, and a fourth inductor and diode series branch, wherein the current input terminals of the first inductor and diode series branch and the second inductor and diode series branch are connected to the first intermediate port of the main power module, the current input terminals of the third inductor and diode series branch and the fourth inductor and diode series branch are connected to the second intermediate port of the main power module, the current output terminals of the first inductor and diode series branch and the third inductor and diode series branch are connected to the first intermediate port of the slave power module, and the current output terminals of the second inductor and diode series branch and the fourth inductor and diode series branch are connected to the second intermediate port of the slave power module.

7. A multi-input source full-wave rectifier circuit, comprising a main power module, a slave power module, and an auxiliary module; wherein: The main power module includes: The first transformer has two ports of its primary winding for connection to the first AC power source, and two ports of its secondary winding and the intermediate tap are respectively the first intermediate port, the second intermediate port and the third intermediate port of the main power module. The first diode has its cathode connected to the first intermediate port of the main power module, and its anode is used to connect to the negative terminal of the DC bus or the second terminal of the load. The second diode has its cathode connected to the second intermediate port of the main power module, and its anode is used to connect to the negative terminal of the DC bus or the second terminal of the load; and A series branch with a first inductor and a third diode has its current input terminal connected to the third intermediate port of the main power module, and its current output terminal is used to connect to the positive terminal of the DC bus or the first terminal of the load. The power module includes: The second transformer has two ports of its primary winding for connection to the second AC power supply, and two ports of its secondary winding and the intermediate tap are respectively from the first intermediate port, the second intermediate port and the third intermediate port of the power module. The fourth diode has its anode connected to the first intermediate port of the power module and its cathode connected to the positive terminal of the DC bus or the first terminal of the load. The fifth diode, whose anode is connected to the second intermediate port of the power module, and whose cathode is used to connect to the positive terminal of the DC bus or the first terminal of the load; and A series branch with a second inductor and a sixth diode has its current output terminal connected to the third intermediate port of the power module, and its current input terminal is used to connect to the negative terminal of the DC bus or the second terminal of the load. The additional module includes at least one inductor and diode series branch, wherein: The inductor and diode series branch has its current input terminal connected to the first intermediate port or the second intermediate port of the main power module, and its current output terminal connected to the first intermediate port or the second intermediate port of the slave power module. Alternatively, the inductor and diode series branch has its current input terminal connected to the first or second intermediate port of the main power module, and its current output terminal connected to the third intermediate port of the slave power module. Alternatively, the inductor and diode series branch has its current input terminal connected to the third intermediate port of the main power module, and its current output terminal connected to the first or second intermediate port of the slave power module.

8. The multi-input source full-wave rectifier circuit according to any one of claims 1 to 7, wherein some or all of the diodes are replaced by controllable switching devices.

9. The multi-input source full-wave rectifier circuit according to any one of claims 1 to 7, wherein the parameters of the first transformer and the second transformer are the same.

10. A method for regulating a multi-input source full-wave rectifier circuit as described in any one of claims 1 to 7, comprising any combination of the following steps: Step 0: Change the type of add-on module; Step 1: Increase or decrease the number of additional modules; Step 2: Increase or decrease the number of series branches of inductors and diodes inside the additional module; Step 3: Change the inductance value of the internal inductor of the additional module; Step 4: Change the operating parameters of the first AC power supply connected to the main power module; Step 5: Change the operating parameters of the second AC power supply connected to the power module.

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