Multiple-input port current-doubler rectifier circuit and its regulation method

Abstract

The application discloses a multi-input port current-doubler rectifier circuit and a regulating method thereof. The multi-input port current-doubler rectifier circuit comprises at least one main power module, at least one slave power module and at least one diode module. The main power module and the slave power module can independently complete electric energy conversion, and the main power module and the slave power module can work cooperatively after being connected through the diode module. The output characteristics of the whole circuit are adjustable, and the applicable regulating methods include changing the number of the diode module and the number of internal diodes.

Description

Technical Field

[0001] This invention relates to a current multiplier rectifier circuit, and more particularly to a multi-input port current multiplier rectifier circuit and its adjustment method. 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 current multiplier rectifier circuit is a common type of rectifier circuit, suitable for high-current applications, and features low output voltage ripple.

[0003] With the development of new energy power generation technologies, AC power sources have become more diverse, including not only traditional thermal, hydroelectric, and nuclear power generators, but also wind, solar thermal, tidal, and hydrogen power generators. Therefore, rectifier circuits also need to be able to utilize multiple AC power sources simultaneously.

[0004] Currently, most common typical rectifier circuits have a single-input, single-output structure. To utilize multiple AC power sources simultaneously, most solutions employ a "single-phase, multiple-output" strategy to construct composite rectifier circuits. That is, multiple identical and independent single-input, single-output sub-rectifier circuits are used, with their input terminals remaining independent but their output terminals connected in parallel.

[0005] Although the "single-phase multi-phase" composite rectifier circuit is simple in construction and easy to understand in its working principle, it does not fully utilize multiple AC power sources from an overall perspective. Therefore, this invention proposes a multi-input port current-doubling rectifier circuit. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing a multi-input port current multiplier rectifier circuit and its adjustment method, which can make full use of multiple AC power sources.

[0007] To achieve the above objectives, the present invention proposes a multi-input port current multiplier rectifier circuit, comprising at least one main power module, at least one slave power module and at least one diode module.

[0008] The main power module includes one transformer, two inductors, and four diodes: The transformer of the main power module has two ports on its primary winding connected to an AC power source, and two ports on its secondary winding are the secondary ports of the transformer of the main power module; the first inductor of the main power module has one end connected to the secondary port of the first transformer of the main power module, and the other end is the first inductor port of the main power module; the second inductor of the main power module has one end connected to the secondary port of the second transformer of the main power module, and the other end is the second inductor port of the main power module; the first diode of the main power module has its anode... The first diode has its anode connected to the negative terminal of the DC bus or one end of the load, and its cathode connected to the secondary side port of the first transformer of the main power module. The second diode of the main power module has its anode connected to the negative terminal of the DC bus or one end of the load, and its cathode connected to the secondary side port of the second transformer of the main power module. The third diode of the main power module has its cathode connected to the positive terminal of the DC bus or the other end of the load, and its anode connected to the first inductor port of the main power module. The fourth diode of the main power module has its cathode connected to the positive terminal of the DC bus or the other end of the load, and its anode connected to the second inductor port of the main power module. The secondary side port of the transformer, the first inductor port, and the second inductor port of the main power module can all be connected to the diode module.

[0009] The power module includes one transformer, two inductors, and four diodes: The transformer of the power module has two ports on its primary winding connected to an AC power source, and two ports on its secondary winding serving as the secondary ports of the transformer; the first inductor of the power module has one end connected to the secondary port of the first transformer, and the other end serving as the first inductor port; the second inductor of the power module has one end connected to the secondary port of the second transformer, and the other end serving as the second inductor port; the first diode of the power module has a cathode... The anode of the first diode in the power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary side port of the first transformer in the power module. The cathode of the second diode in the power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary side port of the second transformer in the power module. The anode of the third diode in the power module is connected to the negative terminal of the DC bus or one end of the load, and its cathode is connected to the first inductor port of the power module. The anode of the fourth diode in the power module is connected to the negative terminal of the DC bus or one end of the load, and its cathode is connected to the second inductor port of the power module. The secondary side port of the transformer, the first inductor port, and the second inductor port of the power module can all be connected to the diode module.

[0010] Preferably, the second structure of the main power module includes one transformer, two inductors, and four diodes: The transformer of the main power module has two ports of its primary winding connected to an AC power source, and two ports of its secondary winding serving as the secondary ports of the transformer; the first inductor of the main power module has one end connected to the secondary port of the first transformer, and the other end serving as the first inductor port of the main power module; the second inductor of the main power module has one end connected to the secondary port of the second transformer, and the other end serving as the second inductor port of the main power module; the first and second diodes of the main power module... The main power module has three diodes: a second diode with its cathode connected to the positive terminal of the DC bus or the other end of the load, and its anode connected to the secondary side port of the first transformer; a third diode with its anode connected to the negative terminal of the DC bus or one end of the load, and its cathode connected to the first inductor port of the main power module; and a fourth diode with its anode connected to the negative terminal of the DC bus or one end of the load, and its cathode connected to the second inductor port of the main power module. The secondary side port of the transformer, the first inductor port, and the second inductor port of the main power module can all be connected to the diode module.

[0011] Preferably, the second structure of the power module includes one transformer, two inductors, and four diodes: The transformer of the power module has two ports on its primary winding connected to an AC power source, and two ports on its secondary winding serving as the secondary ports of the power module; the first inductor of the power module has one end connected to the secondary port of the first transformer, and the other end serving as the first inductor port; the second inductor of the power module has one end connected to the secondary port of the second transformer, and the other end serving as the second inductor port; the first and second diodes of the power module... The power module has three diodes: a first diode with its anode connected to the negative terminal of the DC bus or one end of the load, and its cathode connected to the secondary side port of the first transformer of the power module; a second diode with its anode connected to the negative terminal of the DC bus or one end of the load, and its cathode connected to the secondary side port of the second transformer of the power module; a third diode with its cathode connected to the positive terminal of the DC bus or the other end of the load, and its anode connected to the first inductor port of the power module; and a fourth diode with its cathode connected to the positive terminal of the DC bus or the other end of the load, and its anode connected to the second inductor port of the power module. The secondary side port of the transformer, the first inductor port, and the second inductor port of the power module can all be connected to the diode module.

[0012] Preferably, the diode module includes at least one diode, the anode of which is connected to the secondary side port of any transformer of the main power module, and the cathode of which is connected to any inductor port of the slave power module.

[0013] Preferably, the diode module includes at least one diode, the anode of which is connected to any inductor port of the main power module, and the cathode of which is connected to any transformer secondary port of the slave power module.

[0014] Preferably, the diode module includes at least one diode, wherein the anode of the diode of the diode module is connected to any secondary port of the transformer of the main power module, and the cathode of the diode of the diode module is connected to any secondary port of the transformer of the slave power module.

[0015] The basic unit of the multi-input port current multiplier rectifier circuit is "1 main power module + 1 slave power module + 1 diode module". There are at least 7 possible combinations of the basic unit: first main power module + first slave power module + first diode module; first main power module + first slave power module + second diode module; first main power module + second slave power module + second diode module; first main power module + second slave power module + third diode module; second main power module + first slave power module + first diode module; second main power module + first slave power module + third diode module; second main power module + second slave power module + third diode module. Furthermore, the number of diodes in the diode module can be variable. Based on the basic structure, a composite structure of "multiple main power modules + multiple slave power modules + multiple diode modules" can be further realized, including one main power module connected to multiple diode modules, one slave power module connected to multiple diode modules, and combinations of different basic structures.

[0016] Any of the diodes mentioned above can be replaced by a unidirectional conductive controllable switching device (such as a synchronous rectifier MOSFET).

[0017] The AC power supply can be a multi-level AC power supply with two or more levels, including a sinusoidal AC power supply; it can be from the same source or different sources.

[0018] To achieve the above objectives, this invention proposes an adjustment method for a multi-input port current multiplier rectifier circuit, comprising any combination of the following steps:

[0019] Step 0: Change the connection method between the diode module and the main power module and / or the slave power module;

[0020] Step 1: Increase or decrease the number of diode modules;

[0021] Step 2: Increase or decrease the number of diodes inside the diode module;

[0022] Step 3: Change the operating parameters of the AC power supply connected to the main power module, including: amplitude, frequency, period, phase, level value, pulse width, etc.

[0023] Step 4: Change the operating parameters of the AC power supply connected to the power module, including amplitude, frequency, period, phase, level, pulse width, etc.

[0024] The beneficial effects of this invention are mainly reflected in the following aspects: Compared with the existing "single-phase multiple" current multiplier rectifier circuit, the multi-input port current multiplier rectifier circuit of this invention consists of a main power module, a slave power module, and a diode module. Both the main power module and the slave power module can independently complete the power conversion, while the diode module connects the main power module and the slave power module, making the adjustment means of the entire rectifier circuit more diversified. That is, changing the type and number of diode modules, changing the number of diodes inside the diode module, and changing the operating parameters of the AC power supply can all adjust the output of the entire circuit, thereby improving the adjustability of the entire circuit. Attached Figure Description

[0025] Figure 1 This is a circuit diagram of Embodiment 1 of the present invention.

[0026] Figure 2 This is the output power characteristic diagram of Embodiment 1 of the present invention.

[0027] Figure 3 This is the output voltage ripple characteristic diagram of Embodiment 1 of the present invention.

[0028] Figure 4 This is a circuit diagram of Embodiment 2 of the present invention.

[0029] Figure 5 This is the output power characteristic diagram of Embodiment 2 of the present invention.

[0030] Figure 6 This is the output voltage ripple characteristic diagram of Embodiment 2 of the present invention.

[0031] Figure 7 This is a circuit diagram of Embodiment 3 of the present invention.

[0032] Figure 8 This is a circuit diagram of Embodiment 4 of the present invention.

[0033] Figure 9 This is the output power characteristic diagram of Embodiment 4 of the present invention.

[0034] Figure 10This is the output voltage ripple characteristic diagram of Embodiment 4 of the present invention. Detailed Implementation

[0035] 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.

[0036] 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. Example 1

[0037] Reference Figure 1 A multi-input port current multiplier rectifier circuit includes at least one main power module, at least one slave power module, and at least one diode module. The main power module, slave power module, and diode module each have the same structure.

[0038] Among them, there is one main power module M1, one slave power module S1, and one diode module J1.

[0039] The main power module is M1, which includes transformer T. 1A Inductor L 1A Inductor L 1B Diode D 1A Diode D 1B Diode D 1C Diode D 1D Transformer T 1A Its primary winding has two ports connected to the AC power supply V. AC1 Connected, its secondary winding has two ports, namely transformer secondary ports 1_A and 1_B; inductor L 1AOne end of it is connected to the secondary side port 1_A of the transformer, and the other end is the inductor port 1_C; inductor L 1B One end of it is connected to the secondary side port 1_B of the transformer, and the other end is the inductor port 1_D; diode D 1A Its anode is connected to the negative terminal V of the DC bus. o - Or one end of the load is connected, and its cathode is connected to the secondary side port 1_A of the transformer; diode D 1B Its anode is connected to the negative terminal V of the DC bus. o - Or one end of the load is connected, and its cathode is connected to the secondary side port 1_B of the transformer; diode D 1C Its cathode is connected to the positive terminal V of the DC bus. o + The other end of the load is connected, and its anode is connected to the inductor port 1_C; diode D 1D Its cathode is connected to the positive terminal V of the DC bus. o + Alternatively, the other end of the load can be connected, with its anode connected to inductor port 1_D.

[0040] The power module S1 includes a transformer T 1a Inductor L 1a Inductor L 1b Diode D 1a Diode D 1b Diode D 1c and diode D 1d Transformer T 1a Its primary winding has two ports connected to the AC power supply V. ac1 Connected, its secondary winding has two ports, namely transformer secondary ports 1_a and 1_b; inductance L 1a One end of it is connected to the secondary side port 1_a of the transformer, and the other end is the inductor port 1_c; inductor L 1b One end of it is connected to the secondary side port 1_b of the transformer, and the other end is the inductor port 1_d; diode D 1a Its cathode is connected to the positive terminal V of the DC bus. o + Or the other end of the load is connected, and its anode is connected to the secondary side port 1_a of the transformer; diode D 1b Its cathode is connected to the positive terminal V of the DC bus. o + Or the other end of the load is connected, and its anode is connected to the secondary side port 1_b of the transformer; diode D 1c Its anode is connected to the negative terminal V of the DC bus. o - One end of the load is connected, and its cathode is connected to the inductor port 1_c; diode D 1dIts anode is connected to the negative terminal V of the DC bus. o - One end of the load is connected, and its cathode is connected to the inductor port 1_d.

[0041] The diode module J1 includes 8 diodes: D a1 D b1 D c1 D d1 D e1 D f1 D g1 D h1 D a1 The anode of the circuit is connected to the secondary side port 1_A of the transformer in the main power module M1, and its cathode is connected to the inductor port 1_c of the slave power module S1; D b1 The anode of the circuit is connected to the secondary side port 1_A of the transformer in the main power module M1, and its cathode is connected to the inductor port 1_d of the slave power module S1; D c1 The anode of the circuit is connected to the secondary side port 1_B of the transformer in the main power module M1, and its cathode is connected to the inductor port 1_c of the slave power module S1; D d1 The anode of the circuit is connected to the secondary side port 1_B of the transformer in the main power module M1, and its cathode is connected to the inductor port 1_d of the slave power module S1; D e1 The anode of the circuit is connected to the inductor port 1_C of the main power module M1, and its cathode is connected to the transformer secondary port 1_a of the power module S1; D f1 The anode of the circuit is connected to the inductor port 1_C of the main power module M1, and its cathode is connected to the transformer secondary port 1_b of the power module S1; D g1 The anode of the circuit is connected to the inductor port 1_D of the main power module M1, and its cathode is connected to the transformer secondary port 1_a of the power module S1; D h1 The anode of J1 is connected to the inductor port 1_D of the main power module M1, and its cathode is connected to the transformer secondary port 1_b of the slave power module S1. The diodes in J1 are used to limit the current direction and prevent circulating current; their number is variable, ranging from 0 to 8.

[0042] For ease of understanding, Figure 1 Only a portion of the entire multi-input port current doubler rectifier circuit—M1, S1, and J1—is shown. Figure 1 Taking the displayed portion as an example, we will focus on the steady-state operation of the main power module, slave power module, and diode module working together. When the main / slave power modules work independently, they are both typical current-multiplying and rectification processes, so they will not be described in detail here.

[0043] For simplicity, assume that M1 and S1 use the same components, and transformer T 1AThe first port of the primary winding and its secondary port 1_A are related by name. Transformer T 1a The first port of the primary winding and its transformer secondary port 1_a are of the same name; the AC power supply V connected to M1 AC1 A two-level AC power supply (+V) AC1 -V AC1 AC power supply V connected to S1 ac1 Also a two-level AC power supply (+A·V) AC1 -A·V AC1 A is a constant. Let's take A > 1 as an example to illustrate this. Figure 1 One operating cycle T1 of the circuit shown can be divided into two stages, and a typical operating condition is as follows:

[0044] (1) Stage 1: v AC1 = +V AC1 v ac1 = +A·V AC1

[0045] In M1: D 1B Conduction, D 1A D 1C D 1D Deadline;

[0046] In S1: D 1a Conduction, D 1b D 1c D 1d Deadline;

[0047] J1: D b1 D f1 D h1 Conduction, D c1 D d1 D e1 D g1 As of now, (a)v AC1 via T 1A With D a1 L 1a D 1a DC bus or load, D 1B Forming the first loop, D a1 The diode is turned on until the current i Da1 (b) v Decrease to 0; AC1 via T 1A v ac1 via T 1a With D b1 L 1b D 1a DC bus or load, D 1B Forming a second loop; (c)vAC1 via T 1A v ac1 via T 1a With L 1A D f1 D 1a DC bus or load, D 1B Forming the third loop; (d)v ac1 via T 1a With L 1B D h1 D 1a DC bus or load, D 1B This forms the fourth loop.

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

[0049] In M1: D 1A Conduction, D 1B D 1C D 1D Deadline;

[0050] In S1: D 1b Conduction, D 1a D 1c D 1d Deadline;

[0051] J1: D c1 D e1 D g1 Conduction, D a1 D b1 D f1 D h1 As of now, (a)v AC1 via T 1A v ac1 via T 1a With D c1 L 1a D 1b DC bus or load, D 1A (b) v forms the first loop; AC1 via T 1A With D d1 L 1b D 1b DC bus or load, D 1A Forming the second loop, D d1 The diode is turned on until the current i Dd1 Decrease to 0; (c)v ac1 via T 1a With L 1AD e1 D 1b DC bus or load, D 1A Forming the third loop; (d)v AC1 via T 1A v ac1 via T 1a With L 1B D g1 D 1b DC bus or load, D 1A This forms the fourth loop.

[0052] As can be seen from the above work process, v AC1 via T 1A v ac1 via T 1a It can supply power to the DC bus or load either independently or in series.

[0053] The operation of diodes J1 with 1 to 7 diodes is similar to that described above and will not be repeated. To better understand the impact of J1 on the adjustability of the entire circuit, let's further assume V... AC1 = 20 V, v AC1 The period T1 = 20 μs, v AC1 +V AC1 The pulse width is T1 / 2, v AC1 -V AC1 The pulse width is also T1 / 2, T 1A and T 1a The primary and secondary turns ratios are both 1:2, the coupling coefficient is 0.999, and the load is R = 50 Ω / / C. o = 1 μF. Three cases are illustrated below. Case 1: A = 1.25; Case 2: A = 1; Case 3: A = 0.8.

[0054] Take L 1A = L 1B = L 1a = L 1b = 300 μF, Figure 2 The output power performance of Embodiment 1 of the present invention is given under the above three conditions. Figure 3 The output voltage ripple performance of Embodiment 1 of the present invention is given under the above three conditions. Figure 2 and Figure 3 It can be seen that (i) the presence or absence of J1 ("absence" is equivalent to the case where the number of its internal diodes is 0) affects both the output power and output voltage ripple of the embodiment; (ii) when J1 is present, the number of its internal diodes affects both the output power and output voltage ripple of the embodiment; (iii) v AC1 and vac1 The amplitude difference or level difference also affects the output power and output voltage ripple of the embodiment. Of course, v AC1 and v ac1 Other parameters (such as frequency, period, phase, pulse width, etc.) will also affect the output power and output voltage ripple of the embodiment, which will not be elaborated here.

[0055] By utilizing the above characteristics, the number of diodes can be varied, which increases the flexibility of control embodiment 1.

[0056] The adjustment method suitable for Example 1 may include any combination of the following steps:

[0057] Step 1: Increase or decrease the number of diode modules J1 (the range is 0 to 1).

[0058] Step 2: Increase or decrease the number of diodes inside diode module J1 (the range is 0 to 8).

[0059] Step 3: Change the AC power supply V connected to the main power module M1 AC1 Operating parameters (V) AC1 );

[0060] Step 4: Change the AC power supply connected to the power module S1. ac1 Operating parameters (A·V) AC1 ). Example 2

[0061] Reference Figure 4 A multi-input port current multiplier rectifier circuit includes at least one main power module, at least one slave power module, and at least one diode module. The main power module, slave power module, and diode module each have the same structure.

[0062] Among them, there is one main power module M1, one slave power module S1, and one diode module J1.

[0063] The main power module M1 is the same as in Embodiment 1.

[0064] The power module S1 includes a transformer T 2a Inductor L 2a Inductor L 2b Diode D 2a Diode D 2b Diode D 2c Diode D 2d Transformer T 2a The two ports of the primary winding are connected to the AC power supply V. ac1Connected, its two ports 1_a and 1_b of the secondary winding are the secondary ports of the transformer; inductance L 2a One end of the inductor is connected to the secondary side port 1_a of the transformer, and the other end is the inductor port 1_c; the inductor L 2b One end of the diode is connected to the secondary side port 1_b of the transformer, and the other end is the inductor port 1_d; diode D 2a The anode and the negative terminal of the DC bus V o - Or one end of the load is connected, and its cathode is connected to the secondary side port 1_a of the transformer; diode D 2b The anode and the negative terminal V of the DC bus o - Or one end of the load is connected, and its cathode is connected to the secondary side port 1_b of the transformer; diode D 2c The cathode and the positive terminal V of the DC bus o + The other end of the load is connected, and its anode is connected to the inductor port 1_c; diode D 2d The cathode and the positive terminal V of the DC bus o + The other end of the load is connected, and its anode is connected to the inductor port 1_d.

[0065] The diode module J1 includes four diodes: D a2 D b2 D c2 D d2 D a2 The anode of the circuit is connected to the inductor port 1_C of the main power module M1, and its cathode is connected to the transformer secondary port 1_a of the power module S1; D b2 The anode of the circuit is connected to the inductor port 1_C of the main power module M1, and its cathode is connected to the transformer secondary port 1_b of the power module S1; D c2 The anode of the circuit is connected to the inductor port 1_D of the main power module M1, and its cathode is connected to the transformer secondary port 1_a of the power module S1; D d2 The anode is connected to the inductor port 1_D of the main power module M1, and its cathode is connected to the transformer secondary port 1_b of the slave power module S1.

[0066] The diodes in J1 are used to limit the direction of current and prevent circulating current. Their number is variable, ranging from 0 to 4.

[0067] For ease of understanding, Figure 4 Only a portion of the entire multi-input port current doubler rectifier circuit—M1, S1, and J1—is shown. Figure 4Taking the displayed portion as an example, we will focus on the steady-state operation of the main power module, slave power module, and diode module working together. When the main / slave power modules work independently, they are both typical current-multiplying and rectification processes, so they will not be described in detail here.

[0068] For simplicity, assume that M1 and S1 use the same components, and transformer T 1A The first port of the primary winding and its secondary port 1_A are related by name. Transformer T 2a The first port of the primary winding and its transformer secondary port 1_a are of the same name; the AC power supply V connected to M1 AC1 A two-level AC power supply (+V) AC1 -V AC1 AC power supply V connected to S1 ac1 (t) = v AC1 (tB*T1), where B is a constant and T1 is the period. Let's take B = 1 / 2 as an example to illustrate. Figure 4 One operating cycle T1 of the circuit shown can be divided into two stages, and a typical operating condition is as follows:

[0069] (1) Stage 1: v AC1 = +V AC1 v ac1 = -V AC1

[0070] In M1: D 1B Conduction, D 1A D 1C D 1D Deadline;

[0071] In S1: D 2d Conduction, D 2a D 2b Deadline;

[0072] J1: D a2 Conduction, D b2 D d2 As of now, (a)L 1B D c2 L 2a D 2c DC bus or load, D 1B Forming the first loop, D 2c and D c2 (b) V conducts until the current in the circuit is zero; AC1 via T 1A v ac1 via T 2a With L 1A D a2 L 2b D2d DC bus or load, D 1B This forms the second loop.

[0073] (2) Stage 2: v AC1 = -V AC1 v ac1 = +V AC1

[0074] In M1: D 1A Conduction, D 1B D 1C D 1D Deadline;

[0075] In S1: D 2c Conduction, D 2a D 2b Deadline;

[0076] J1: D d2 Conduction, D a2 D c2 As of now, (a)L 1A D b2 L 2b D 2d DC bus or load, D 1A Forming the first loop, D 2d and D b2 (b) V conducts until the current in the circuit is zero; AC1 via T 1A v ac1 via T 2a With L 1B D d2 L 2a D 2c DC bus or load, D 1A This forms the second loop.

[0077] As can be seen from the above work process, v AC1 via T 1A v ac1 via T 2a Power is supplied to the DC bus or load in series.

[0078] The operation of diodes J1 with 1 to 3 diodes is similar to that described above and will not be repeated. To better understand the impact of J1 on the adjustability of the entire circuit, let's further assume V... AC1 = 20 V, v AC1 The period T1 = 20 μF, v AC1 +V AC1 The pulse width is T1 / 2, v AC1 -V AC1The pulse width is also T1 / 2, T 1A and T 2a The primary and secondary turns ratios are both 1:2, the coupling coefficient is 0.999, and the load is R = 50 Ω / / C. o = 1 μF. Three cases are illustrated below. Case 1: B = 0.5; Case 2: B = 0.25; Case 3: B = 1.

[0079] Take L 1A = L 1B = L 2a = L 2b = 100 μH, Figure 5 The output power performance of Embodiment 2 of the present invention is given under the above three conditions. Figure 6 The output voltage ripple performance of Embodiment 2 of the present invention is given under the above three conditions. Figure 5 and Figure 6 It can be seen that (i) the presence or absence of J1 ("absence" is equivalent to the case where the number of its internal diodes is 0) affects both the output power and output voltage ripple of Example 2; (ii) when J1 is present, the number of its internal diodes affects both the output power and output voltage ripple of Example 2; (iii) v AC1 and v ac1 The phase difference also affects the output power and output voltage ripple of Example 2. Of course, v AC1 and v ac1 Other parameters (such as amplitude or level, frequency, period, pulse width, etc.) will also affect the output power and output voltage ripple of Example 2, which will not be elaborated further.

[0080] By utilizing the above characteristics, the number of diodes can be varied, which increases the flexibility of control embodiment 2.

[0081] The adjustment method suitable for Embodiment 2 may include any combination of the following steps:

[0082] Step 1: Increase or decrease the number of diode modules J1 (the range is 0 to 1).

[0083] Step 2: Increase or decrease the number of diodes inside diode module J1 (the range is 0 to 4).

[0084] Step 3: Change the AC power supply V connected to the main power module M1 AC1 Operating parameters;

[0085] Step 4: Change the AC power supply connected to the power module S1. ac1 The working parameters (B*T1). Example 3

[0086] Reference Figure 7 A multi-input port current multiplier rectifier circuit includes at least one main power module, at least one slave power module, and at least one diode module. The main power module, slave power module, and diode module each have the same structure.

[0087] Among them, there is one main power module M1, one slave power module S1, and one diode module J1.

[0088] The main power module M1 includes a transformer T. 2A Inductor L 2A Inductor L 2B Diode D 2A Diode D 2B Diode D 2C Diode D 2D 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, namely transformer secondary ports 1_A and 1_B; inductor L 2A One end of the inductor is connected to the secondary side port 1_A of the first transformer, and the other end is the port 1_C of the first inductor; the inductor L 2B One end of the diode is connected to the secondary side port 1_B of the second transformer, and the other end is the port 1_D of the second inductor; diode D 2A The cathode and the positive terminal V of the DC bus o + The other end of the load is connected, and its anode is connected to the secondary side port 1_A of the first transformer; diode D 2B The cathode and the positive terminal V of the DC bus o + Or the other end of the load is connected, and its anode is connected to the secondary side port 1_B of the second transformer; diode D 2C The anode and the negative terminal V of the DC bus o - One end of the load is connected, and its cathode is connected to the first inductor port 1_C; diode D 2D The anode and the negative terminal V of the DC bus o - One end of the load is connected, and its cathode is connected to the second inductor port 1_D.

[0089] The diode module J1 includes four diodes: D a3 D b3 D c3 D d3 D a3The anode of the circuit is connected to the secondary side port 1_A of the transformer in the main power module M1, and its cathode is connected to the inductor port 1_c of the slave power module S1; D b3 The anode of the circuit is connected to the secondary side port 1_A of the transformer in the main power module M1, and its cathode is connected to the inductor port 1_d of the slave power module S1; D c3 The anode of the circuit is connected to the secondary side port 1_B of the transformer in the main power module M1, and its cathode is connected to the inductor port 1_c of the slave power module S1; D d3 The anode of J1 is connected to the secondary side port 1_B of the transformer in the main power module M1, and its cathode is connected to the inductor port 1_d of the slave power module S1. The diodes in J1 are used to limit the direction of current and prevent circulating current; their number is variable, ranging from 0 to 4.

[0090] The rest of the structure is the same as in Example 1.

[0091] Structurally, Example 3 and Example 2 are reciprocal. Their working principles are equivalent and their effects are identical, so further details are omitted.

[0092] The adjustment method suitable for Example 2 is also suitable for Example 3. Example 4

[0093] Reference Figure 8 A multi-input port current multiplier rectifier circuit includes at least one main power module, at least one slave power module, and at least one diode module. The main power module, slave power module, and diode module each have the same structure.

[0094] Among them, there is one main power module M1, one slave power module S1, and one diode module J1.

[0095] The main power module M1 is the same as in Embodiment 3, and the slave power module S1 is the same as in Embodiment 2.

[0096] The diode module J1 includes four diodes: D a4 D b4 D c4 D d4 D a4 The anode is connected to the secondary side port 1_A of the transformer in the main power module M1, and its cathode is connected to the secondary side port 1_a of the transformer in the slave power module S1; D b4 The anode is connected to the secondary side port 1_A of the transformer of the main power module M1, and its cathode is connected to the secondary side port 1_b of the transformer of the slave power module S1; D c4 The anode is connected to the secondary side port 1_B of the transformer of the main power module M1, and its cathode is connected to the secondary side port 1_a of the transformer of the slave power module S1; D d4The anode of J1 is connected to the secondary side port 1_B of the transformer in the main power module M1, and its cathode is connected to the secondary side port 1_b of the transformer in the slave power module S1. The diodes in J1 are used to limit the direction of current and prevent circulating current; their number is variable, ranging from 0 to 4.

[0097] For ease of understanding, Figure 8 Only a portion of the entire multi-input port current doubler rectifier circuit—M1, S1, and J1—is shown. Figure 8 Taking the displayed portion as an example, we will focus on the steady-state operation of the main power module, slave power module, and diode module working together. When the main / slave power modules work independently, they are both typical current-multiplying and rectification processes, so they will not be described in detail here.

[0098] For simplicity, assume that M1 and S1 use the same components, and transformer T 2A The first port of the primary winding and its secondary port 1_A are related by name. Transformer T 2a The first port of the primary winding and its transformer secondary port 1_a are of the same name; the AC power supply V connected to M1 AC1 A two-level AC power supply (+V) AC1 -V AC1 AC power supply V connected to S1 ac1 (t) = v AC1 (a*t), where a is a constant. Let's take a = 2 as an example to illustrate this. Figure 8 One operating cycle T1 of the circuit shown can be divided into 4 stages, and a typical operating condition is as follows:

[0099] (1) Stage 1: v AC1 = +V AC1 v ac1 = +V AC1

[0100] In M1: D 2D Conduction, D 2A D 2B Deadline;

[0101] In S1: D 2c Conduction, D 2a D 2b Deadline;

[0102] J1: D b4 Conduction, D a4 D c4 D d4 As of now, (a)v AC1 via T 2A v ac1 via T 2a With D b4L 2a D 2c DC bus or load, D 2D L 2B (b) L forms the first loop; 2A D b4 L 2b D 2d DC bus or load, D 2C Forming the second loop, D 2C and D 2d The circuit is turned on until the current in the circuit is zero.

[0103] (2) Stage 2: v AC1 = +V AC1 v ac1 = -V AC1

[0104] In M1: D 2D Conduction, D 2A D 2B D 2C Deadline;

[0105] In S1: D 2d Conduction, D 2a D 2b Deadline;

[0106] J1: D a4 Conduction, D b4 D c4 D d4 As of now, (a)v AC1 via T 2A v ac1 via T 2a With D a4 L 2b D 2d DC bus or load, D 2D L 2B (b) v forms the first loop; AC1 via T 2A With D a4 L 2a D 2c DC bus or load, D 2D L 2B Forming the second loop, D 2c The circuit is turned on until the current in the circuit is zero.

[0107] (3) Stage 3: v AC1 = -V AC1 v ac1 = +V AC1

[0108] In M1: D 2C Conduction, D 2A D 2B Deadline;

[0109] In S1: D 2c Conduction, D 2a D 2b Deadline;

[0110] J1: D d4 Conduction, D a4 D b4 D c4 As of now, (a)v AC1 via T 2A v ac1 via T 2a With D d4 L 2a D 2c DC bus or load, D 2C L 2A (b) L forms the first loop; 2B D d4 L 2b D 2d DC bus or load, D 2D Forming the second loop, D 2D and D 2d The circuit is turned on until the current in the circuit is zero.

[0111] (4) Stage 4: v AC1 = -V AC1 v ac1 = -V AC1

[0112] In M1: D 2C Conduction, D 2A D 2B、 D 2D Deadline;

[0113] In S1: D 2d Conduction, D 2a D 2b Deadline;

[0114] J1: D c4 Conduction, D a4 D b4 D d4 As of now, (a)v AC1 via T 2A v ac1 via T 2a With D c4 L 2b D 2dDC bus or load, D 2C L 2A (b) v forms the first loop; AC1 via T 2A With D c4 L 2a D 2c DC bus or load, D 2c、 L 2A Forming the second loop, D 2c The circuit is turned on until the current in the circuit is zero.

[0115] As can be seen from the above work process, v AC1 via T 2A v ac1 via T 2a It can supply power to the DC bus or load either independently or in series.

[0116] The operation of diodes J1 with 1 to 3 diodes is similar to that described above and will not be repeated. To better understand the impact of J1 on the adjustability of the entire circuit, let's further assume V... AC1 = 20 V, v AC1 The period T1 = 20 μs, v AC1 +V AC1 The pulse width is T1 / 2, v AC1 -V AC1 The pulse width is also T1 / 2, T 2A and T 2a The primary and secondary turns ratios are both 1:2, the coupling coefficient is 0.999, and the load is R = 50 Ω / / C. o = 1 μF. Two cases are illustrated below. Case 1: a = 2; Case 2: a = 1.

[0117] Take L 2A = L 2B = L 2a = L 2b = 100 μH, Figure 9 The output power performance of Embodiment 4 of the present invention is given under the above two conditions. Figure 10 The output voltage ripple performance of Embodiment 4 of the present invention is given under the above two conditions. Figure 9 and Figure 10 It can be seen that (i) the presence or absence of J1 ("absence" is equivalent to the case where the number of its internal diodes is 0) affects both the output power and output voltage ripple of Example 4; (ii) when J1 is present, the number of its internal diodes affects both the output power and output voltage ripple of Example 4; (iii) v AC1 and v ac1The frequency difference or period difference also affects the output power and output voltage ripple of Example 4. Of course, v AC1 and v ac1 Other parameters (such as amplitude or level, phase, pulse width, etc.) will also affect the output power and output voltage ripple of Example 4, which will not be elaborated here.

[0118] By utilizing the above characteristics, the number of diodes can be varied, which increases the flexibility of control embodiment 4.

[0119] The adjustment method suitable for Example 4 may include any combination of the following steps:

[0120] Step 1: Increase or decrease the number of diode modules J1 (the range is 0 to 1).

[0121] Step 2: Increase or decrease the number of diodes inside diode module J1 (the range is 0 to 4).

[0122] Step 3: Change the AC power supply V connected to the main power module M1 AC1 Operating parameters (T1);

[0123] Step 4: Change the AC power supply connected to the power module S1. ac1 Operating parameters (T1 / a).

[0124] As described above, both the main power module and the slave power module have two structures, while the diode module has three structures that can be used in combination. With simple permutations and combinations, at least seven different implementations can be formed. Typical implementations 1 to 4 are selected for illustration and explanation; the remaining implementations, due to their largely similar working principles, will not be listed or elaborated upon further.

[0125] 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 (such as 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, and the AC form can be two-level or higher multi-level or sinusoidal; multiple AC power supplies can be from the same source or different sources; the transformer parameters (such as the number of turns on the primary and secondary sides, magnetizing inductance, and the relationship between the same and different terminals) in the main power module and the slave power module can be the same or different; one main power module can be connected to multiple diode modules; one slave power module can also be connected to multiple diode modules.

[0126] 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 as limited to the specific forms described in the embodiments. The scope of protection of this invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A multi-input port current multiplier rectifier circuit, characterized in that: It includes at least one main power module, at least one slave power module, and at least one diode module; The main power module includes one transformer, two inductors, and four diodes consisting of a first diode, a second diode, a third diode, and a fourth diode of the main power module. The transformer of the main power module has two ports of its primary winding connected to the AC power supply, and two ports of its secondary winding are the secondary ports of the transformer of the main power module, namely the first secondary port of the transformer of the main power module and the second secondary port of the transformer of the main power module. The two inductors are the first inductor of the main power module and the second inductor of the main power module, respectively. One end of the first inductor of the main power module is connected to the secondary side port of the first transformer of the main power module, and the other end is the first inductor port of the main power module. One end of the second inductor of the main power module is connected to the secondary side port of the second transformer of the main power module, and the other end is the second inductor port of the main power module. The anode of the first diode of the main power module is connected to the negative terminal of the DC bus or one end of the load, and the cathode is connected to the secondary side port of the first transformer of the main power module. The anode of the second diode of the main power module is connected to the negative terminal of the DC bus or one end of the load, and the cathode is connected to the secondary side port of the second transformer of the main power module. The cathode of the third diode of the main power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the first inductor port of the main power module. The cathode of the fourth diode of the main power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the second inductor port of the main power module. The power module includes one transformer, two inductors, and four diodes consisting of a first diode, a second diode, a third diode, and a fourth diode. The transformer of the power module has two ports of its primary winding connected to the AC power supply, and two ports of its secondary winding are the secondary ports of the power module transformer, namely the first secondary port of the power module transformer and the second secondary port of the power module transformer. The two inductors are the first inductor and the second inductor of the power module, respectively. One end of the first inductor of the power module is connected to the secondary side port of the first transformer of the power module, and the other end is the first inductor port of the power module. One end of the second inductor of the power module is connected to the secondary side port of the second transformer of the power module, and the other end is the second inductor port of the power module. The cathode of the first diode of the power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary side port of the first transformer of the power module. The cathode of the second diode of the power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary side port of the second transformer of the power module. The anode of the third diode of the power module is connected to the negative terminal of the DC bus or one end of the load, and the cathode is connected to the first inductor port of the power module. The anode of the fourth diode of the power module is connected to the negative terminal of the DC bus or one end of the load, and the cathode is connected to the second inductor port of the power module. The diode module includes at least one diode: The anode of the diode in the diode module is connected to any transformer secondary port of the main power module, and the cathode of the diode in the diode module is connected to any inductor port of the slave power module. Alternatively, the anode of the diode in the diode module is connected to any inductor port of the main power module, and the cathode of the diode in the diode module is connected to any transformer secondary port of the slave power module.

2. The multi-input port current multiplier rectifier circuit according to claim 1, characterized in that: The power module also has another structure, including one transformer, two inductors, and four diodes consisting of a first diode, a second diode, a third diode, and a fourth diode of the power module. The transformer of the power module has two ports of its primary winding connected to the AC power supply, and two ports of its secondary winding are the secondary ports of the power module transformer, namely the first secondary port of the power module transformer and the second secondary port of the power module transformer. The two inductors are the first inductor and the second inductor of the power module, respectively. One end of the first inductor of the power module is connected to the secondary side port of the first transformer of the power module, and the other end is the first inductor port of the power module. One end of the second inductor of the power module is connected to the secondary side port of the second transformer of the power module, and the other end is the second inductor port of the power module. The anode of the first diode of the power module is connected to the negative terminal of the DC bus or one end of the load, and the cathode is connected to the secondary side port of the first transformer of the power module. The anode of the second diode of the power module is connected to the negative terminal of the DC bus or one end of the load, and the cathode is connected to the secondary side port of the second transformer of the power module. The cathode of the third diode of the power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the first inductor port of the power module. The cathode of the fourth diode of the power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the second inductor port of the power module. The diode module includes at least one diode: The anode of the diode in the diode module is connected to any inductor port or any transformer secondary port of the main power module, and the cathode of the diode in the diode module is connected to any transformer secondary port of the slave power module.

3. The multi-input port current multiplier rectifier circuit according to claim 1, characterized in that: The main power module also has another structure, including one transformer, two inductors, and four diodes consisting of a first diode, a second diode, a third diode, and a fourth diode of the main power module. The transformer of the main power module has two ports of its primary winding connected to the AC power supply, and two ports of its secondary winding are the secondary ports of the transformer of the main power module, namely the first secondary port of the transformer of the main power module and the second secondary port of the transformer of the main power module. The two inductors are the first inductor of the main power module and the second inductor of the main power module, respectively. One end of the first inductor of the main power module is connected to the secondary side port of the first transformer of the main power module, and the other end is the first inductor port of the main power module. One end of the second inductor of the main power module is connected to the secondary side port of the second transformer of the main power module, and the other end is the second inductor port of the main power module. The cathode of the first diode of the main power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary side port of the first transformer of the main power module. The cathode of the second diode of the main power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary side port of the second transformer of the main power module. The anode of the third diode of the main power module is connected to the negative terminal of the DC bus or one end of the load, and its cathode is connected to the first inductor port of the main power module. The anode of the fourth diode of the main power module is connected to the negative terminal of the DC bus or one end of the load, and its cathode is connected to the second inductor port of the main power module. The diode module includes at least one diode: The anode of the diode in the diode module is connected to any transformer secondary port of the main power module, and the cathode of the diode in the diode module is connected to any inductor port or any transformer secondary port of the slave power module.

4. The multi-input port current multiplier rectifier circuit according to claim 1, characterized in that: The main power module also has another structure, including one transformer, two inductors, and four diodes consisting of a first diode, a second diode, a third diode, and a fourth diode of the main power module. The transformer of the main power module has two ports of its primary winding connected to the AC power supply, and two ports of its secondary winding are the secondary ports of the transformer of the main power module, namely the first secondary port of the transformer of the main power module and the second secondary port of the transformer of the main power module. The two inductors are the first inductor of the main power module and the second inductor of the main power module, respectively. One end of the first inductor of the main power module is connected to the secondary side port of the first transformer of the main power module, and the other end is the first inductor port of the main power module. One end of the second inductor of the main power module is connected to the secondary side port of the second transformer of the main power module, and the other end is the second inductor port of the main power module. The cathode of the first diode of the main power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary side port of the first transformer of the main power module. The cathode of the second diode of the main power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary side port of the second transformer of the main power module. The anode of the third diode of the main power module is connected to the negative terminal of the DC bus or one end of the load, and its cathode is connected to the first inductor port of the main power module. The anode of the fourth diode of the main power module is connected to the negative terminal of the DC bus or one end of the load, and its cathode is connected to the second inductor port of the main power module. The power module also has another structure, including one transformer, two inductors, and four diodes consisting of a first diode, a second diode, a third diode, and a fourth diode of the power module. The transformer of the power module has two ports of its primary winding connected to the AC power supply, and two ports of its secondary winding are the secondary ports of the power module transformer, namely the first secondary port of the power module transformer and the second secondary port of the power module transformer. The two inductors are the first inductor and the second inductor of the power module, respectively. One end of the first inductor of the power module is connected to the secondary side port of the first transformer of the power module, and the other end is the first inductor port of the power module. One end of the second inductor of the power module is connected to the secondary side port of the second transformer of the power module, and the other end is the second inductor port of the power module. The anode of the first diode of the power module is connected to the negative terminal of the DC bus or one end of the load, and the cathode is connected to the secondary side port of the first transformer of the power module. The anode of the second diode of the power module is connected to the negative terminal of the DC bus or one end of the load, and the cathode is connected to the secondary side port of the second transformer of the power module. The cathode of the third diode of the power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the first inductor port of the power module. The cathode of the fourth diode of the power module is connected to the positive terminal of the DC bus or the other end of the load, and its anode is connected to the second inductor port of the power module. The diode module includes at least one diode: The anode of the diode in the diode module is connected to any secondary port of the transformer in the main power module, and the cathode of the diode in the diode module is connected to any secondary port of the transformer in the slave power module.

5. A multi-input port current multiplier rectifier circuit, characterized in that: The multi-input port current multiplier rectifier circuit is any combination of claims 1 to 4.

6. The multi-input port current multiplier rectifier circuit as described in claim 5, characterized in that: Some or all of the diodes are replaced by controllable switching devices that conduct electricity in one direction.

7. The multi-input port current multiplier rectifier circuit as described in claim 5 or 6, characterized in that: The number of diodes in the diode module is variable.

8. The multi-input port current multiplier rectifier circuit as described in claim 5 or 6, characterized in that: One main power module is connected to at least one diode module, and / or one slave power module is connected to at least one diode module.

9. The multi-input port current multiplier rectifier circuit as described in claim 5 or 6, characterized in that: Some or all of the transformer parameters are the same or different.

10. A method for adjusting any multi-input port current-doubling rectifier circuit of claims 1 to 9, characterized in that: Includes any combination of the following steps: Step 0: Change the connection method between the diode module and the main power module and / or the slave power module; Step 1: Increase or decrease the number of diode modules; Step 2: Increase or decrease the number of diodes inside the diode module; Step 3: Change the operating parameters of the AC power supply connected to the main power module; Step 4: Change the operating parameters of the AC power supply connected to the power module.

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