Rectifier circuit comprising a full-wave rectification power module and method for regulating the same

Abstract

Disclosed are a rectifier circuit comprising full-wave rectification power modules and a method for regulating the same. The rectifier circuit comprises at least one complete power module, at least one simplified power module and at least one additional module, wherein the complete power module can independently complete power conversion, and the simplified power module cooperates with the complete power module through the additional module. Compared with the prior art, the output characteristics of the rectifier circuit according to the embodiments of the present application are more adjustable, and the output characteristic regulation means is more diversified.

Description

Technical Field

[0001] This invention relates to rectifier circuits, and more particularly to 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 coordinated operation between the sub-rectifier circuits and circuit simplification.

[0005] To overcome the shortcomings of the lack of coordination between the sub-rectifier circuits in the existing "single-phase multi-stage" rectifier circuit and to meet the need for circuit simplification, this invention proposes a rectifier circuit containing a full-wave rectifier power module, and also includes an adjustment method to further improve its performance.

[0006] A rectifier circuit with a full-wave rectifier power module according to an embodiment of the present invention includes a complete power module, a simplified power module, and an additional module. The complete 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 complete power module; a first diode, whose cathode is connected to the first center port of the complete 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 complete 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 third diode and a first inductor, whose current input terminal is connected to the third center port of the complete 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 simplified 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, respectively, a first center port, a second center port, and a third center port of the simplified power module. The third center port is used to connect to the positive terminal of a DC bus or the first terminal of a 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 any center port of the complete power module, and its current output terminal is connected to the first center port or the second center port of the simplified power module.

[0007] This invention also provides a rectifier circuit containing a full-wave rectifier power module, including a complete power module, a simplified power module, and an additional module. The complete 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 complete power module; a first diode, whose cathode is connected to the first center port of the complete 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 complete 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 third diode and a first inductor, whose current input terminal is connected to the third center port of the complete 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 simplified 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, respectively, a first center port, a second center port, and a third center port of the simplified power module; a fourth diode, whose cathode is connected to the first center port of the simplified power module, and whose anode is connected to the negative terminal of the DC bus or the second terminal of the load; and a fifth diode, whose cathode is connected to the second center port of the simplified power module, and whose anode 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 any center port of the simplified power module, and its current output terminal is connected to either the first center port or the second center port of the complete power module.

[0008] This invention further provides a rectifier circuit containing a full-wave rectifier power module, including a complete power module, a simplified power module, and an additional module. The complete 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 complete power module; a first diode, whose anode is connected to the first center port of the complete 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 complete 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 third diode and a first inductor, whose current output terminal is connected to the third center port of the complete 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 simplified 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 an intermediate tap, respectively, a first intermediate port, a second intermediate port, and a third intermediate port of the simplified power module. The third intermediate port 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 output terminal of the inductor and diode series branch is connected to any intermediate port of the complete power module, and its current input terminal is connected to the first intermediate port or the second intermediate port of the simplified power module.

[0009] This invention also provides a rectifier circuit containing a full-wave rectifier power module, including a complete power module, a simplified power module, and an additional module. The complete 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 complete power module; a first diode, whose anode is connected to the first center port of the complete 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 complete 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 third diode and a first inductor, whose current output terminal is connected to the third center port of the complete 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 simplified 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 simplified power module, respectively; a fourth diode, whose anode is connected to the first intermediate port of the simplified power module, and whose cathode is connected to the positive terminal of the DC bus or the first terminal of the load; and a fifth diode, whose anode is connected to the second intermediate port of the simplified power module, and whose cathode 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 output terminal of the inductor and diode series branch is connected to any intermediate port of the simplified power module, and its current input terminal is connected to the first or second intermediate port of the complete power module.

[0010] Based on the above structure, there are at least four possible combinations of the most basic unit of the rectifier circuit containing the full-wave rectifier power module: "1 complete power module + 1 simplified power module + 1 additional module". Building upon this basic unit, a composite structure of "multiple complete power modules + multiple simplified power modules + multiple additional modules" can be further realized, including one complete power module connected to multiple additional modules, one simplified power module connected to multiple additional 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 connected to the complete power module can be a three-level or higher multi-level AC power supply, including a sinusoidal AC power supply. The AC power supply connected to the simplified power module can be a two-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 connection method between the add-on module and the full power module or / and the simplified power 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 complete 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 simplified 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 existing "single-phase multiple" rectifier circuits, the rectifier circuit containing a full-wave rectifier power module according to embodiments of this invention includes a complete power module, a simplified power module, and an additional module. The complete power module can independently complete power conversion, while the simplified power module completes power conversion in conjunction with the complete power module through the additional module. Current flows between the complete power module and the simplified power module. This structure makes the adjustment methods of the entire rectifier circuit more diverse. Changing the connection method of the additional module, changing the number of additional modules, changing the number of inductor and diode series branches within the additional module, changing the inductance value of the inductor in the inductor and diode series branches, and changing the operating parameters of the AC power supply can all alter the output characteristics of the rectifier circuit, improving its adjustability. 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 a circuit diagram of Embodiment 3 of the present invention.

[0024] Figure 5 This is the output power characteristic diagram of Embodiment 3 of the present invention.

[0025] Figure 6 This is the output current ripple characteristic diagram of Embodiment 3 of the present invention.

[0026] Figure 7 This is a circuit diagram of Embodiment 4 of the present invention.

[0027] Figure 8 This is the output power characteristic diagram of Embodiment 4 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] Reference Figure 1 A rectifier circuit containing a full-wave rectifier power module includes at least one complete power module, at least one simplified power module, and at least one additional module. In some embodiments, the rectifier circuit includes multiple complete power modules, multiple simplified power modules, and multiple additional modules, which may have the same structure or different structures.

[0032] The system includes one complete power module (M1), one simplified power module (S1), and one additional module (J1). The rectifier circuit is connected to the first AC power supply V. AC1 The 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 complete 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 Its 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 Its 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; diode D 1C With inductor L 1A The series branch has its current input terminal connected to the third intermediate port 1_C, and its current output terminal connected to the positive terminal V of the DC bus. o + Or connect to the first end of the load.

[0034] The simplified power module S1 includes a transformer T. 1a 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 an intermediate tap, namely the first intermediate port 1_a, the second intermediate port 1_b, and the third intermediate port 1_c, respectively. The third intermediate port 1_c is connected to the positive terminal V of the DC bus. o + Or connect to the first end of the load.

[0035] The additional module J1 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 complete power module M1, and the inductor L a1 The other end is connected to diode D a1 The anode of diode D is connected. a1 The cathode is connected to the first intermediate port 1_a of the simplified 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 complete power module M1, and the inductor L b1The other end is connected to diode D b1 at its anode, and the cathode of diode D b1 is connected to the second intermediate port 1_b of the simplified power module S1. Besides defining the current direction, when the number of inductor and diode series branches is greater than 1, the diode can also prevent circulating current. The number of inductor and diode series branches in J1 is variable, with a variation range from 0 to 2.

[0036] For ease of understanding, Figure 1 only a part of the rectification circuit of the entire full-wave rectification power module is shown - the complete power module M1, the simplified power module S1, and the additional module J1. Taking Figure 1 the shown part as an example, the steady-state working process of the complete power module, the simplified power module, and the additional module working together is introduced. When the complete power module works independently, it is a typical full-wave rectification working process, so it will not be elaborated here.

[0037] For simplicity, assume that the complete power module M1 and the simplified power module S1 use the same components. The first port of the primary winding of transformer T 1A (for example, connected to the positive terminal of the AC power supply v AC1 ) and the first port 1_A of its secondary winding are in the relationship of corresponding terminals. The first port of the primary winding of transformer T 1a (for example, connected to the positive terminal of the AC power supply v ac1 ) and the first port 1_a of its secondary winding are in the relationship of corresponding terminals. Take the center tap of the secondary winding of T 1A as the center tap, and take the center tap of the secondary winding of T 1a as the center tap. The AC power supply v AC1 connected to the complete power module M1 is a three-level AC power supply (+V AC1 , 0, -V AC1 ), and the AC power supply v ac1 connected to the simplified power module S1 is a two-level AC power supply (+A·V AC1 , -A·V AC1 ), where A is a constant. Taking 0 < A < 1 as an example for illustration. Figure 1 One 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 , v ac1 = +A·V AC1

[0039] In the complete power module M1: D 1B and D 1C conduct, D 1A cuts off, (a) vAC1 via T 1A With L 1A D 1C DC bus or load, D 1B This forms the first loop;

[0040] In add-on module J1: D a1 and D b1 Conductive, (b)v AC1 via T 1A v ac1 via T 1a With L a1 D a1 DC bus or load, D 1B This forms the second loop; (c)v AC1 via T 1A v ac1 via T 1a With L b1 D b1 DC bus or load, D 1B This forms the third loop.

[0041] (2) Stage 2: v AC1 =0, v ac1 =+A·V AC1

[0042] At this time, T 1A The secondary side is equivalent to a short circuit;

[0043] In the complete 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 formed D1C It is zero, during which time it is determined by D. 1A and D 1B Share i D1C ;

[0044] In add-on module J1: D b1 Conductive, (b)v ac1 via T 1a With L b1 D b1 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 (c)Da1 Conduct until v ac1 via T 1a With L a1 D a1 DC bus or load, D 1A D 1B The current in the third loop is zero, during which time it is controlled by D. 1A and D 1B They share the series current i of the first inductor and the diode. a1 .

[0045] (3) Stage 3: v AC1 =-V AC1 v ac1 =-A·V AC1

[0046] In the complete 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;

[0047] In add-on module J1: D a1 and D b1 Conductive, (b)v AC1 via T 1A v ac1 via T 1a With L a1 D a1 DC bus or load, D 1A This forms the second loop; (c)v AC1 via T 1A v ac1 via T 1a With L b1 D b1 DC bus or load, D 1A This forms the third loop.

[0048] (4) Stage 2: v AC1 =0, v ac1 =-A·V AC1

[0049] At this time, T 1A The secondary side is equivalent to a short circuit;

[0050] In the complete power module M1: D 1A and D 1B Conductive, (a)D 1CConduct 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 ;

[0051] In add-on module J1: D a1 Conductive, (b)v ac1 via T 1a With L a1 D a1 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 first inductor and the diode. a1 (c)D b1 Conduct until v ac1 via T 1a With L b1 D b1 DC bus or load, D 1A D 1B The current in the third loop is zero, during which time it is controlled by D. 1A and D 1B They share the series current i of the second inductor and the diode. b1 .

[0052] As can be seen from the above working process, the complete power module M1 can work independently, but the simplified power module S1 requires the additional module J1 to participate in the power conversion. Because the secondary winding of the transformer has a center tap, and the series connection of the inductor and diode also limits the direction of the current, the AC power supply can not only provide electrical energy but also absorb it. This characteristic can be used to smooth the output power of the entire rectifier circuit.

[0053] 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 rectifier circuit containing the full-wave rectifier power module, 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, v ac1 +A·VAC1 Pulse width is T1 / 2, v ac1 -A·V AC1 The pulse width is also T1 / 2, T 1A and T 1a The primary and secondary turns ratios are both 1:4, 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.

[0054] Take L 1A =300μH,L a1 =L b1 =500μH, 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) v AC1 and v ac1 The amplitude difference or level difference also affects the output power of Example 1.

[0055] Furthermore, those skilled in the art will know through analysis that 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 rectifier circuit containing the full-wave rectifier power module. Due to space limitations, this will not be elaborated further.

[0056] The current input terminal of the inductor and diode series branch in J1 can be connected to either the third intermediate port 1_C of M1, or the first intermediate port 1_A or the second intermediate port 1_B of M1. The current output terminal is connected to either the first intermediate port 1_a or the second intermediate port 1_b of S1. Their operation is similar and will not be described further. The number and connection method of the inductor and diode series branches can be set according to specific application requirements. For example, the first intermediate port 1_a and the second intermediate port 1_b of S1 can be connected to each intermediate port of M1 respectively through inductor and diode series branches, resulting in up to six series branches.

[0057] Taking advantage of the above characteristics, the adjustment method of Example 1 may include the following steps:

[0058] Step 0: Change the connection method between the additional module and the full power module or / and the simplified power module (1_A, 1_B, 1_C or / and 1_a, 1_b are optional);

[0059] Step 1: Increase or decrease the number of additional modules J1 (from 0 to 1);

[0060] Step 2: Increase or decrease the number of series branches of inductors and diodes inside the additional module (0 to 6);

[0061] Step 3: Change the inductance value (L) of the internal inductor of the additional module. a1 and / or L b1 );

[0062] Step 4: Change the AC power supply connected to the complete power module M1. AC1 amplitude or level value (V) AC1 );

[0063] Step 5: Change the AC power supply connected to the simplified power module S1. ac1 amplitude or level value (A*V) AC1 ).

[0064] Example 2

[0065] Reference Figure 3 A rectifier circuit containing a full-wave rectifier power module includes at least one complete power module, at least one simplified power module, and at least one additional module. The complete power module is M1, the simplified power module is S1, and the additional module is J1.

[0066] The complete power module M1 includes a transformer T. 2A Inductor L 2A diode D 2A diode D 2B and diode D 2C Transformer T 2A Its primary winding has two ports 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 Its 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 Its 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; diode D 2C With inductor L 2A The series branch has its current output terminal connected to the third intermediate port 1_C, and its current input terminal connected to the negative terminal V of the DC bus. o -Or connect to the second end of the load.

[0067] The simplified power module S1 includes a transformer T. 2a Transformer T 2a Its primary winding has two ports connected to the AC power supply V. ac1 Connected, its secondary winding has two ports and an intermediate tap, namely the first intermediate port 1_a, the second intermediate port 1_b, and the third intermediate port 1_c, respectively. The third intermediate port 1_c is connected to the negative terminal V of the DC bus. o - Or connect to the second end of the load.

[0068] 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 third intermediate port 1_C of the complete power module M1, and the inductor L a2 The other end is connected to diode D a2 The cathodes are connected, and diode D a2 The anode is connected to the first intermediate port 1_a of the simplified 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 third intermediate port 1_C of the complete power module M1, and the inductor L b2 The other end is connected to diode D b2 The cathodes are connected, and diode D b2 The anode of the diode is connected to the second intermediate port 1_b of the simplified power module S1. Besides limiting the direction of the current, the diode 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 2.

[0069] In addition to connecting to the third intermediate port 1_C of M1, the current output terminal of the inductor and diode series branch in J1 can also be connected to the first intermediate port 1_A or the second intermediate port 1_B of M1.

[0070] Structurally, Embodiment 2 and Embodiment 1 are reciprocal. Except for the opposite direction of some currents, the working principle and effect of Embodiment 2 are similar to those of Embodiment 1, and the applicable adjustment methods are also the same, so they will not be described again.

[0071] Example 3

[0072] Reference Figure 4A rectifier circuit containing a full-wave rectifier power module includes at least one complete power module, at least one simplified power module, and at least one additional module. The complete power module is M1, the simplified power module is S1, and the additional module is J1.

[0073] The simplified power module S1 includes a transformer T. 3a diode D 3a and diode D 3b Transformer T 3a Its primary winding has two ports 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 3a Its 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 3b Its 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 connect to the first end of the load.

[0074] The additional module J1 includes two 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 anode of diode D is connected. a3 The cathode is connected to the third intermediate port 1_c 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 second intermediate port 1_B of M1, and the inductor L b3 The other end is connected to diode D b3 The anode of diode D is connected. b3 The cathode of J1 is connected to the third intermediate port 1_c of S1. Besides limiting the direction of current, the diode 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 2.

[0075] The rest of the structure is the same as in Example 2.

[0076] For ease of understanding, Figure 4Only a portion of Embodiment 3 is shown—the complete power module M1, the simplified power module S1, and the additional module J1. Figure 4 Taking the displayed portion as an example, we will focus on introducing the steady-state operation process of the complete power module, the simplified power module, and the auxiliary modules working together. When the complete power module operates independently, it is a typical full-wave rectification process, so it will not be described in detail.

[0077] For simplicity, it is assumed that the complete power module M1 and the simplified power module S1 use the same components, and the transformer T... 2A The first port of the primary winding and the first port 1_A of the secondary winding are related by name. Transformer T 3a The first port of the primary winding and the first port 1_a of the secondary winding 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. 3a The center tap of the secondary winding is the center tap. The AC power supply V is connected to the complete power module M1. AC1 A three-level AC power supply (+V) AC1 , 0, -V AC1 AC power supply V connected to simplified power module S1 ac1 (t)=v AC1 (a·t), i.e., v AC1 and v ac1 The amplitude or level value, 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 4 One operating cycle T1 of the circuit shown can be divided into 8 stages, and a typical operating condition is as follows:

[0078] (1) Stage 1: v AC1 =+V AC1 &v ac1 =+V AC1

[0079] In the complete 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;

[0080] In simplified power module S1: D 3a Conduction, D 3b Deadline;

[0081] In add-on module J1: D a3 and D b3 Conductive, (b)vAC1 via T 2A v ac1 via T 3a With L a3 D a3 D 3a DC bus or load, D 2C L 2A This forms the second loop; (c)v AC1 via T 2A v ac1 via T 3a With L b3 D b3 D 3a DC bus or load, D 2C L 2A The third loop is formed.

[0082] (2) Stage 2: v AC1 =+V AC1 &v ac1 =0

[0083] At this time, T 3a The secondary side is equivalent to a short circuit;

[0084] In the complete 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;

[0085] In simplified power module S1: D 3a and D 3b Conduction;

[0086] In add-on module J1: D a3 Conductive, (b)v AC1 via T 2A With L a3 D a3 D 3a and D 3b DC bus or load, D 2C L 2A The second loop is formed, during which the current in the second loop is controlled by D. 3a and D 3b Share the burden; (c)D b3 Conduct until v AC1 via T 2A With L b3 D b3 D3a and D 3b DC bus or load, D 2C L 2A The current in the third loop is zero, and during this period, the current in the third loop is controlled by D. 3a and D 3b Share the burden.

[0087] (3) Stage 3: v AC1 =0&v ac1 =-V AC1

[0088] At this time, T 2A The secondary side is equivalent to a short circuit;

[0089] In the complete power module M1: D 2C Conductive, (a)D 2A and D 2B Conduct until L 2A D 2A D 2B DC bus or load, D 2C The current in the first loop is zero, and during this period, the current in the first loop is controlled by D. 2A and D 2B Share the burden;

[0090] In simplified power module S1: D 3b Conduction, D 3a Deadline;

[0091] In add-on module J1: D a3 and D b3 Conductive, (b)v ac1 via T 3a With L a3 D a3 D 3b DC bus or load, D 2C L 2A This forms the second loop; (c)v ac1 via T 3a With L b3 D b3 D 3b DC bus or load, D 2C L 2A This forms the third loop.

[0092] (4) Stage 4: v AC1 =0&v ac1 =0

[0093] At this time, T 2A and T 3a The secondary sides are all equivalent to short circuits;

[0094] In the complete power module M1: D 2C Conduction, D 2A and D 2B All deadlines have passed;

[0095] In simplified power module S1: D 3a and D 3b Conduction;

[0096] In add-on module J1: D a3 and D b3 Conduction, (a)L a3 D a3 D 3a D 3b DC bus or load, D 2C L 2A The first loop is formed, during which the current in the first loop is controlled by D. 3a and D 3b (b)L b3 D b3 D 3a D 3b DC bus or load, D 2C L 2A The second loop is formed, during which the current in the second loop is controlled by D. 3a and D 3b Share the burden.

[0097] (5) Stage 5: v AC1 =-V AC1 &v ac1 =+V AC1

[0098] In the complete 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;

[0099] In simplified power module S1: D 3a Conduction, D 3b Deadline;

[0100] In add-on module J1: D a3 and D b3 Conductive, (b)v AC1 via T 2A v ac1 via T 3a With La3 D a3 D 3a DC bus or load, D 2C L 2A This forms the second loop; (c)v AC1 via T 2A v ac1 via T 3a With L b3 D b3 D 3a DC bus or load, D 2C L 2A The third loop is formed.

[0101] (6) Stage 6: v AC1 =-V AC1 &v ac1 =0

[0102] At this time, T 3a The secondary side is equivalent to a short circuit;

[0103] In the complete 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;

[0104] In simplified power module S1: D 3a and D 3b Conduction;

[0105] In add-on module J1: D b3 Conductive, (b)v AC1 via T 2A With L b3 D b3 D 3a and D 3b DC bus or load, D 2C L 2A The second loop is formed, during which the current in the second loop is controlled by D. 3a and D 3b Share the burden; (c)D a3 Conduct until v AC1 via T 2A With L a3 D a3 D 3a and D 3b DC bus or load, D 2C L 2AThe current in the third loop is zero, and during this period, the current in the third loop is controlled by D. 3a and D 3b Share the burden.

[0106] (7) Stage 7: v AC1 =0&v ac1 =-V AC1

[0107] At this time, T 2A The secondary side is equivalent to a short circuit;

[0108] In the complete power module M1: D 2C Conductive, (a)D 2A D 2B Conduct until L 2A D 2A D 2B DC bus or load, D 2C The current in the first loop is zero, during which the current in the first loop is controlled by D. 2A and D 2B Share the burden;

[0109] In simplified power module S1: D 3b Conduction, D 3a Deadline;

[0110] In add-on module J1: D a3 and D b3 Conductive, (b)v ac1 via T 3a With L a3 D a3 D 3b DC bus or load, D 2C L 2A This forms the second loop; (c)v ac1 via T 3a With L b3 D b3 D 3b DC bus or load, D 2C L 2A This forms the third loop.

[0111] (8) Stage 8: v AC1 =0&v ac1 =0

[0112] At this time, T 2A and T 3a The secondary sides are all equivalent to short circuits;

[0113] In the complete power module M1: D 2C Conduction, D 2A and D2B All deadlines have passed;

[0114] In simplified power module S1: D 3a and D 3b Conduction;

[0115] In add-on module J1: D a3 and D b3 Conduction, (a)L a3 D a3 D 3a D 3b DC bus or load, D 2C L 2A The first loop is formed, during which the current in the first loop is controlled by D. 3a and D 3b (b)L b3 D b3 D 3a D 3b DC bus or load, D 2C L 2A The second loop is formed, during which the current in the second loop is controlled by D. 3a and D 3b Share the burden.

[0116] As can be seen from the above working process, when the complete power module M1, the simplified power module S1, and the additional module J1 work together, they incorporate the two AC power sources into the power conversion circuit in an alternating and superimposed manner. Because the secondary winding of the transformer has a center tap, and the series connection of the inductor and diode also limits the direction of the current, the AC power sources can not only provide electrical energy but also absorb it. This working characteristic can be used to smooth the output power of the entire rectifier circuit.

[0117] 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 Example 3, it is assumed that: 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 3a The primary and secondary turns ratios are both 1:4, 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.

[0118] Take La3 =L b3 =L 2A =300μH, Figure 5 The above two scenarios provide an output power performance of Embodiment 3 of the present invention. Figure 6 The output current ripple performance of Embodiment 3 of the present invention is given under the above two conditions. Figure 5 and Figure 6 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 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) v AC1 and v ac1 The frequency difference or period difference affects the output power of Example 3.

[0119] In addition, the internal inductor L of the additional module J1 a3 and L b3 The inductance value also affects the output characteristics (including output power and output current ripple) of Example 3.

[0120] The current output terminal of the inductor and diode series branch in J1 can be connected to either the third intermediate port 1_c of S1, or the first intermediate port 1_a or the second intermediate port 1_b of S1. The current input terminal is connected to either the first intermediate port 1_A or the second intermediate port 1_B of M1. Their operation is similar and will not be described further. The number and connection method of the inductor and diode series branches can be set according to specific application requirements. For example, the first intermediate port 1_A and the second intermediate port 1_B of M1 can be connected to each intermediate port of S1 respectively through inductor and diode series branches, resulting in up to six series branches.

[0121] Taking advantage of the above characteristics, the adjustment method of Example 3 includes any combination of the following steps:

[0122] Step 0: Change the connection method between the additional module and the full power module or / and the simplified power module (1_A, 1_B or / and 1_a, 1_b, 1_c optional);

[0123] Step 1: Increase or decrease the number of additional modules J1 (from 0 to 1);

[0124] Step 2: Increase or decrease the number of inductor and diode series branches in the inductor branch module (0 to 6);

[0125] Step 3: Change the inductance value (L) of the internal inductor of the additional module. a3and / or L b3 );

[0126] Step 4: Change the AC power supply connected to the complete power module M1. AC1 The frequency or period (T1);

[0127] Step 5: Change the AC power supply connected to the simplified power module S1. ac1 The frequency or period (T1 / a).

[0128] Example 4

[0129] Reference Figure 7 A rectifier circuit containing a full-wave rectifier power module includes at least one complete power module, at least one simplified power module, and at least one additional module. The complete power module is M1, the simplified power module is S1, and the additional module is J1.

[0130] The simplified power module S1 includes a transformer T. 4a diode D 4a and diode D 4b Transformer T 4a Its primary winding has two ports 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 4a Its 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 4b Its 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 connect to the second end of the load.

[0131] The additional module J1 includes four inductor and diode series branches: the first inductor and diode series branch is inductor L a4 and diode D a4 Formed in series, inductor L a4 One end is connected to the first intermediate port 1_A of M1, and the inductor L a4 The other end is connected to diode D a4 The cathodes are connected, and diode D a4 The anode is connected to the first intermediate port 1_a of S1; the second inductor and diode are connected in series via inductor L. b4 and diode D b4 Formed in series, inductor L b4 One end is connected to the first intermediate port 1_A of M1, and the inductor Lb4 The other end is connected to diode D b4 The cathodes are connected, and diode D b4 The anode is connected to the second intermediate port 1_b of S1; the third inductor and diode are connected in series via inductor L. c4 and diode D c4 Formed in series, inductor L c4 One end is connected to the second intermediate port 1_B of M1, and the inductor L c4 The other end is connected to diode D c4 The cathodes are connected, and diode D c4 The anode is connected to the first intermediate port 1_a of S1; the fourth inductor and diode are connected in series via inductor L. d4 and diode D d4 Formed in series, inductor L d4 One end is connected to the second intermediate port 1_B of M1, and the inductor L d4 The other end is connected to diode D d4 The cathodes are connected, and diode D d4 The anode of the diode is connected to the second intermediate port 1_b of S1. Besides limiting the direction of the current, the diode 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.

[0132] The rest of the structure is the same as in Example 1.

[0133] For ease of understanding, Figure 7 Only a portion of Embodiment 4 is shown—the complete power module M1, the simplified power module S1, and the additional module J1. Figure 7 Taking the displayed portion as an example, we will focus on introducing the steady-state operation process of the complete power module, the simplified power module, and the auxiliary modules working together. When the complete power module operates independently, it is a typical full-wave rectification process, so it will not be described in detail.

[0134] For simplicity, it is assumed that the complete power module M1 and the simplified power module S1 use the same components, and the transformer T... 1A The first port of the primary winding and the first port 1_A of the secondary winding are related by name. Transformer T 4a The first port of the primary winding and the first port 1_a of the secondary winding are related by name. Take T... 1A The center tap of the secondary winding is the center tap, and T is taken as the center tap. 4a The center tap of the secondary winding is the center tap. The AC power supply V is connected to the complete power module M1. AC1 A three-level AC power supply (+V) AC1 , 0, -V AC1 ), +V AC1 and -VAC1 The pulse width is t W AC power supply V connected to simplified power module S1 ac1 Also a three-level AC power supply (+V) AC1 , 0, -V AC1 ), but +V AC1 and -V AC1 The pulse width is B·t W That is, v AC1 and v ac1 The amplitude or level value, frequency or period, and phase are all the same, but the pulse width is different. This will be illustrated using B<1 as an example. Figure 7 One operating cycle T1 of the circuit shown can be divided into 6 stages, and a typical operating condition is as follows:

[0135] (1) Stage 1: v AC1 =+V AC1 &v ac1 =+V AC1

[0136] In the complete power module M1: D 1B and D 1C Conduction, D 1A As of now, (a)v AC1 via T 1A With L 1A D 1C DC bus and load, D 1B This forms the first loop;

[0137] In simplified power module S1: D 4b Conduction, D 4a Deadline;

[0138] In add-on module J1: D c4 Conduction, D a4 and D d4 As of now, (b)v AC1 via T 1A v ac1 via T 4a With D c4 L c4 L 1A D 1C DC bus or load, D 4b Forming a second loop; (c)D b4 Conduct until v AC1 via T 1A With D b4 L b4 L 1A D 1C DC bus or load, D 4b The current in the third loop is zero.

[0139] (2) Stage 2: v AC1 =+V AC1 &v ac1 =0

[0140] At this time, T 4a The secondary side is equivalent to a short circuit;

[0141] In the complete power module M1: D 1B and D 1C Conduction, D 1A As of now, (a)v AC1 via T 1A With L 1A D 1C DC bus and load, D 1B This forms the first loop;

[0142] In simplified power module S1: D 4a and D 4b Conduction;

[0143] In add-on module J1: D c4 Conduction, D a4 D b4 and D d4 As of now, (b)v AC1 via T 1A With D c4 L c4 L 1A D 1C DC bus or load, D 4a D 4b The second loop is formed, during which the current in the second loop is controlled by D. 4a and D 4b Share the burden.

[0144] (3) Stage 3: v AC1 =0&v ac1 =0

[0145] At this time, T 1A and T 4a The secondary sides are all equivalent to short circuits;

[0146] In the complete power module M1: D 1C Conductive, (a)D 1A and D 1B Conduct until L 1A D 1C DC bus and load, D 1A D 1B The current in the first loop is zero, during which the current in the first loop is controlled by D. 1A and D1B Share the burden;

[0147] In simplified power module S1: D 4a and D 4b Conduction;

[0148] In add-on module J1: D c4 Conduction, D a4 D b4 and D d4 As of now, (b)D c4 L c4 L 1A D 1C DC bus or load, D 4a D 4b The second loop is formed, during which the current in the second loop is controlled by D. 4a and D 4b Share the burden.

[0149] (4) Stage 4: v AC1 =-V AC1 &v ac1 =-V AC1

[0150] In the complete 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 and load, D 1A This forms the first loop;

[0151] In simplified power module S1: D 4a Conduction, D 4b Deadline;

[0152] In add-on module J1: D b4 Conduction, D a4 and D d4 As of now, (b)v AC1 via T 1A v ac1 via T 4a With D b4 L b4 L 1A D 1C DC bus or load, D 4a Forming a second loop; (c)D c4 Conduct until v AC1 via T 1A With D c4 L c4 L1A D 1C DC bus or load, D 4a The current in the third loop is zero.

[0153] (5) Stage 5: v AC1 =-V AC1 &v ac1 =0

[0154] At this time, T 4a The secondary side is equivalent to a short circuit;

[0155] In the complete 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 and load, D 1A This forms the first loop;

[0156] In simplified power module S1: D 4a and D 4b Conduction;

[0157] In add-on module J1: D b4 Conduction, D a4 D c4 and D d4 As of now, (b)v AC1 via T 1A With D b4 L b4 L 1A D 1C DC bus or load, D 4a D 4b The second loop is formed, during which the current in the second loop is controlled by D. 4a and D 4b Share the burden.

[0158] (6) Stage 6: v AC1 =0&v ac1 =0

[0159] At this time, T 1A and T 4a The secondary sides are all equivalent to short circuits;

[0160] In the complete power module M1: D 1C Conductive, (a)D 1A and D 1B Conduct until L 1A D 1C DC bus and load, D 1AD 1B The current in the first loop is zero, during which the current in the first loop is controlled by D. 1A and D 1B Share the burden;

[0161] In simplified power module S1: D 4a and D 4b Conduction;

[0162] In add-on module J1: D b4 Conduction, D a4 D c4 and D d4 As of now, (b)D b4 L b4 L 1A D 1C DC bus or load, D 4a D 4b The second loop is formed, during which the current in the second loop is controlled by D. 4a and D 4b Share the burden.

[0163] As can be seen from the above working process, the complete power module M1 can perform power conversion either independently or in conjunction with the simplified power module S1 system. Because the secondary winding of the transformer has a center tap, and the series connection of the inductor and diode also limits the direction of the current, the AC power supply can not only provide electrical energy but also absorb it. This operating characteristic can be used to smooth the output power of the entire rectifier circuit.

[0164] The operation of the inductor and diode series branches in J1, with 1 to 3 branches, 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 Example 4, it is assumed that: v AC1 t W =22.5μs, V AC1 =20V, v AC1 The period T1 = 90 μs, T 1A and T 4a The primary and secondary turns ratios are both 1:4, and the DC bus voltage V o =20V. Two cases will be considered for further explanation: Case 1: B = 0.6; Case 2: B = 1.

[0165] Take L a4 =L b4 =L c4 =L d4 =L 1A =300μH, Figure 8 The output power performance of Embodiment 4 of the present invention is given under the above two conditions. Figure 8It 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 4; (ii) when the additional module J1 is present, the number of its internal inductors and diodes in series affects the output power of Embodiment 4; (iii) v AC1 and v ac1 The pulse width difference affects the output power of Example 4.

[0166] In addition, the internal inductor L of the additional module J1 a4 To L d4 The sensitivity value also affects the output characteristics of Example 4.

[0167] In J1, the current input terminal of the inductor and diode series branch can be connected to the first intermediate port 1_a and the second intermediate port 1_b of S1, and can also be connected to the third intermediate port 1_c of S1. The current output terminal is connected to either the first intermediate port 1_A or the second intermediate port 1_B of M1. Their operation is similar and will not be described further. The number and connection method of the inductor and diode series branch can be set according to specific application requirements. For example, in... Figure 6 Based on the embodiment shown, an inductor and diode series branch can be further set to connect the third intermediate port 1_c of S1 to the first intermediate port 1_A and the second intermediate port 1_B of M1 respectively. In this case, the number of series branches can be as high as 6.

[0168] Taking advantage of the above characteristics, the adjustment method of Example 4 includes any combination of the following steps:

[0169] Step 0: Change the connection method between the additional module and the full power module or / and the simplified power module (1_A, 1_B or / and 1_a, 1_b, 1_c optional);

[0170] Step 1: Increase or decrease the number of additional modules J1 (from 0 to 1);

[0171] Step 2: Increase or decrease the number of inductor and diode series branches in the inductor branch module (0 to 6);

[0172] Step 3: Change the inductance value (L) of the internal inductor of the additional module. a4 and / or L b4 and / or L c4 and / or L d4 );

[0173] Step 4: Change the AC power supply connected to the complete power module M1. AC1 pulse width (t) W );

[0174] Step 5: Change the AC power supply connected to the simplified power module S1. ac1 Pulse width (B*t) W ).

[0175] 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; 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 complete power module and the simplified 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 module can be selected and adjusted according to the specific application. Besides 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 scope of protection of this invention. The embodiments described in this specification are merely examples of implementations of the inventive concept; the scope of protection of this invention should not be considered limited to the specific forms stated in the embodiments, and the scope of protection 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 rectifier circuit containing a full-wave rectifier power module, comprising a complete power module, a simplified power module, and an additional module, wherein: The complete 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 complete power module. The first diode has its cathode connected to the first intermediate port of the complete 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 complete 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 third diode and a first inductor has its current input terminal connected to the third intermediate port of the complete 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 simplified 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 the first intermediate port, the second intermediate port and the third intermediate port of the simplified power module. The third intermediate port 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 any intermediate port of the complete power module, and its current output terminal connected to the first or second intermediate port of the simplified power module.

2. The rectifier circuit with a full-wave rectifier power module 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 complete power module, the current output terminal of the first inductor and diode series branch is connected to the first intermediate port of the simplified power module, and the current output terminal of the second inductor and diode series branch is connected to the second intermediate port of the simplified power module.

3. A rectifier circuit containing a full-wave rectifier power module, comprising a complete power module, a simplified power module, and an additional module, wherein: The complete 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 complete power module. The first diode has its cathode connected to the first intermediate port of the complete 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 complete 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 third diode and a first inductor has its current input terminal connected to the third intermediate port of the complete 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 simplified 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 the first intermediate port, the second intermediate port and the third intermediate port of the simplified power module. The fourth diode, whose cathode is connected to the first intermediate port of the simplified power module, and whose anode is used to connect to the negative terminal of the DC bus or the second terminal of the load; and The fifth diode has its cathode connected to the second intermediate port of the simplified 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 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 any intermediate port of the simplified power module, and its current output terminal connected to the first or second intermediate port of the complete power module.

4. The rectifier circuit with a full-wave rectifier power module as described in claim 3, 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 third inductor and diode series branch are connected to the first intermediate port of the simplified power module, wherein the current input 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 simplified power module, the current output 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 complete power module, and the current output 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 complete power module.

5. A rectifier circuit containing a full-wave rectifier power module, comprising a complete power module, a simplified power module, and an additional module, wherein: The complete 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 complete power module. The first diode has its anode connected to the first intermediate port of the complete 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 complete 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 third diode and a first inductor has its current output terminal connected to the third intermediate port of the complete power module, and its current input terminal connected to the negative terminal of the DC bus or the second terminal of the load. The simplified 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 the first intermediate port, the second intermediate port and the third intermediate port of the simplified power module. The third intermediate port 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 inductor and diode series branch has its current output terminal connected to any intermediate port of the complete power module, and its current input terminal connected to the first or second intermediate port of the simplified power module.

6. The rectifier circuit with a full-wave rectifier power module as described in claim 5, wherein the additional module includes a first inductor and diode series branch and a second inductor and diode series branch, wherein 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 complete power module, the current input terminal of the first inductor and diode series branch is connected to the first intermediate port of the simplified power module, and the current input terminal of the second inductor and diode series branch is connected to the second intermediate port of the simplified power module.

7. A rectifier circuit containing a full-wave rectifier power module, comprising a complete power module, a simplified power module, and an additional module, wherein: The complete 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 complete power module. The first diode has its anode connected to the first intermediate port of the complete 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 complete 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 third diode and a first inductor has its current output terminal connected to the third intermediate port of the complete power module, and its current input terminal connected to the negative terminal of the DC bus or the second terminal of the load. The simplified 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 the first intermediate port, the second intermediate port and the third intermediate port of the simplified power module. A fourth diode, whose anode is connected to the first intermediate port of the simplified 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 The fifth diode has its anode connected to the second intermediate port of the simplified 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 additional module includes at least one inductor and diode series branch, wherein: The current output terminal of the inductor and diode series branch is connected to any intermediate port of the simplified power module, and its current input terminal is connected to the first or second intermediate port of the complete power module.

8. The rectifier circuit with a full-wave rectifier power module as described in claim 7, wherein the additional module includes a first inductor and diode series branch and a second inductor and diode series branch, wherein 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 simplified power module, the current input terminal of the first inductor and diode series branch is connected to the first intermediate port of the complete power module, and the current input terminal of the second inductor and diode series branch is connected to the second intermediate port of the complete power module.

9. The rectifier circuit containing a full-wave rectifier power module as described in any one of claims 1 to 8, wherein some or all of the diodes are replaced by controllable switching devices.

10. A method for adjusting a rectifier circuit containing a full-wave rectifier power module as described in any one of claims 1 to 8, comprising any combination of the following steps: Step 0: Change the connection method between the add-on module and the full power module or / and the simplified power 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 complete power module; Step 5: Change the operating parameters of the second AC power supply connected to the simplified power module.

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