Rectifier circuit comprising a current doubling rectifier module and method for regulating the same

Abstract

The rectifier circuit with current doubling rectifier circuit module and its regulating method, including at least one complete power module, at least one simplified power module and at least one diode module. The complete power module can independently complete the power conversion, while the simplified power module needs to be connected with the complete power module through the diode module to complete the power conversion. The complete power module, the simplified power module and the diode module work together, which not only can more fully utilize the energy of the AC power supply, but also can enhance the adjustability of the output characteristics of the whole circuit. The applicable adjusting method includes changing the number of diode modules and the number of internal diodes.

Description

Technical Field

[0001] This invention relates to a current multiplier rectifier circuit, and more particularly to a rectifier circuit containing a current multiplier rectifier circuit module 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, from an overall perspective, the circuit does not fully utilize multiple AC power sources, and its structure is not simplified. Therefore, this invention proposes a rectifier circuit containing a current-multiplying rectifier circuit module and its adjustment method. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing a rectifier circuit with a current multiplier rectifier circuit module and its adjustment method, which makes full use of multiple AC power sources and simplifies the structure.

[0007] To achieve the above objectives, the present invention proposes a rectifier circuit containing a current multiplier rectifier circuit module; It includes at least one complete power module, at least one simplified power module, and at least one diode module.

[0008] The complete power module includes one transformer, two inductors, and four diodes: the transformer of the complete power module has two ports of its primary winding connected to an AC power source; the first inductor of the complete power module has one end connected to the first port of the secondary winding of the transformer of the complete power module, and the other end is the first inductor port of the complete power module; the second inductor of the complete power module has one end connected to the second port of the secondary winding of the transformer of the complete power module, and the other end is the second inductor port of the complete power module; the first diode of the complete 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 first port of the secondary winding of the transformer of the complete power module; the second diode of the complete 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 second port of the secondary winding of the transformer of the complete power module; the third diode of the complete 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 complete power module; the fourth diode of the complete 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 complete power module. Both the first and second inductor ports of the complete power module can be connected to the diode module.

[0009] The simplified power module includes one transformer and two diodes: the transformer's primary winding has two ports connected to an AC power source, and its secondary winding has two ports on the secondary side; the first diode's cathode is connected to either the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary port of the first transformer; the second diode's cathode is connected to either the positive terminal of the DC bus or the other end of the load, and its anode is connected to the secondary port of the second transformer. The secondary ports of the transformer can be connected to the diode module.

[0010] Preferably, the complete power module includes one transformer, two inductors, and four diodes: the transformer of the complete power module has two ports of its primary winding connected to an AC power source; the first inductor of the complete power module has one end connected to the first port of the secondary winding of the transformer, and the other end is the first inductor port of the complete power module; the second inductor of the complete power module has one end connected to the second port of the secondary winding of the transformer, and the other end is the second inductor port of the complete power module; the first diode of the complete power module has its cathode connected to either the positive or negative terminal of the DC bus. The other end of the load is connected, and its anode is connected to the first port of the secondary winding of the transformer in the complete power module; the cathode of the second diode of the complete 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 port of the secondary winding of the transformer in the complete power module; the anode of the third diode of the complete 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 complete power module; the anode of the fourth diode of the complete 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 complete power module. Both the first and second inductor ports of the complete power module can be connected to the diode module.

[0011] Preferably, the simplified power module includes a transformer: the transformer of the simplified 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 simplified power module transformer. The center tap of its secondary winding is connected to the positive terminal of a DC bus or the other end of a load. The secondary ports of the simplified power module transformer can be connected to a diode module.

[0012] Preferably, the simplified power module includes one transformer and two diodes: the transformer's primary winding has two ports connected to an AC power source, and its secondary winding's center tap is the transformer's secondary side center port; the first diode's cathode 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 transformer's secondary side port; the second diode's cathode 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 transformer's secondary side port. The transformer's secondary side center port can be connected to the diode module.

[0013] Preferably, the simplified power module includes one transformer and two diodes: the transformer's primary winding has two ports connected to an AC power source, and its secondary winding has two ports on the secondary side; 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 port of the first transformer; the second 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 port of the second transformer. The secondary ports of the transformer in the simplified power module can be connected to the diode module.

[0014] Preferably, the simplified power module includes a transformer: the transformer of the simplified 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 simplified power module transformer. The center tap of its secondary winding is connected to the negative terminal of the DC bus or one end of the load. The secondary ports of the simplified power module transformer can be connected to a diode module.

[0015] Preferably, the simplified power module includes one transformer and two diodes: the transformer's primary winding has two ports connected to an AC power source, and its secondary winding's center tap is the transformer's secondary side center port; the first diode's anode is connected to the negative terminal of the DC bus or one end of the load, and its cathode is connected to the first transformer's secondary side port; the second diode's anode is connected to the negative terminal of the DC bus or one end of the load, and its cathode is connected to the second transformer's secondary side port. The transformer's secondary side center port is connected to the diode module.

[0016] Preferably, the diode module includes at least one diode, with the anode of the diode connected to any inductor port of the complete power module and the cathode of the diode connected to any transformer secondary port of the simplified power module.

[0017] Preferably, the diode module includes at least one diode, with the anode of the diode connected to any inductor port of the complete power module and the cathode of the diode connected to the middle port of the transformer secondary side of the simplified power module.

[0018] Preferably, the diode module includes at least one diode, with the cathode of the diode in the diode module connected to any inductor port of the complete power module, and the anode of the diode in the diode module connected to any transformer secondary port of the simplified power module.

[0019] Preferably, the diode module includes at least one diode, with the cathode of the diode in the diode module connected to any inductor port of the complete power module, and the anode of the diode in the diode module connected to the middle port of the transformer secondary side of the simplified power module.

[0020] The basic unit of the rectifier circuit containing the current multiplier rectifier circuit module is "1 complete power module + 1 simplified power module + 1 diode module". There are at least 6 possible combinations of the basic unit: first complete power module + first simplified power module + first diode module; first complete power module + second simplified power module + first diode module; first complete power module + third simplified power module + second diode module; second complete power module + fourth simplified power module + third diode module; second complete power module + fifth simplified power module + third diode module; second complete power module + sixth simplified power module + fourth diode module. Furthermore, the number of diodes in the diode module is variable. Based on the basic structure, a composite structure of "multiple complete power modules + multiple simplified power modules + multiple diode modules" can be further realized, including one complete power module connected to multiple diode modules and one simplified power module connected to multiple diode modules, as well as combinations of different basic units.

[0021] Any of the diodes mentioned above can be replaced by a controllable switching device (such as a synchronous rectifier MOSFET).

[0022] 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.

[0023] The same rectifier circuit may contain one or more complete power modules, one or more simplified power modules, and one or more diode modules.

[0024] To achieve the above objectives, the present invention also proposes an adjustment method applicable to rectifier circuits containing current multiplier rectifier circuit modules, comprising any combination of the following steps: Step 0: Change the connection method between the diode module and the complete power module or / and simplify the 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 complete power module, including: amplitude, frequency, period, phase, level, pulse width, etc. Step 4: Change the operating parameters of the AC power supply connected to the simplified power module, including amplitude, frequency, period, phase, level, pulse width, etc.

[0025] The beneficial effects of this invention are mainly reflected in the following aspects: Compared with the existing "single-phase multiple" current-multiplying rectifier circuits, the rectifier circuit of this invention, which includes a current-multiplying rectifier circuit module, consists of a complete power module capable of independently completing power conversion, a simplified power module that cannot independently complete power conversion, and a diode module. The connection function of the diode modules allows the complete power module and the simplified power module to work together, making fuller use of the AC power supply. The entire circuit has strong adjustability, and the applicable adjustment methods are diverse. That is, changing the number of diode modules, changing the number of diodes inside the diode modules, and changing the operating parameters of the AC power supply can all adjust the output of the rectifier circuit. Attached Figure Description

[0026] Figure 1 This is a circuit diagram of Embodiment 1 of the present invention.

[0027] Figure 2 This is the output power characteristic diagram of Embodiment 1 of the present invention.

[0028] Figure 3 This is the output voltage ripple characteristic diagram of Embodiment 1 of the present invention.

[0029] Figure 4 This is a circuit diagram of Embodiment 2 of the present invention.

[0030] Figure 5 This is the output power characteristic diagram of Embodiment 2 of the present invention.

[0031] Figure 6 This is the output voltage ripple characteristic diagram of Embodiment 2 of the present invention.

[0032] Figure 7 This is a circuit diagram of Embodiment 3 of the present invention.

[0033] Figure 8 This is the output power characteristic diagram of Embodiment 3 of the present invention.

[0034] Figure 9 This is the output voltage ripple characteristic diagram of Embodiment 3 of the present invention.

[0035] Figure 10 This is a circuit diagram of Embodiment 4 of the present invention.

[0036] Figure 11 This is a circuit diagram of Embodiment 5 of the present invention.

[0037] Figure 12 This is a circuit diagram of Embodiment 6 of the present invention. Detailed Implementation

[0038] 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.

[0039] 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

[0040] Reference Figure 1 A rectifier circuit including a current multiplier rectifier circuit module comprises at least one complete power module, at least one simplified power module, and at least one diode module. The complete power module, simplified power module, and diode module each have the same structure.

[0041] Among them, one complete power module is M1, one simplified power module is S1, and one diode module is J1.

[0042] The complete power module is M1, including 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; Inductance L 1A One end of it is connected to transformer T 1A The first port of the secondary winding is connected, and its other end is inductor port 1_A, which is connected to diode module J1. Inductor L 1B One end of it is connected to transformer T1A The second port of the secondary winding is connected, and its other end is the inductor port 1_B, which is connected to the diode module J1; 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 transformer T. 1A The first port of the secondary winding is connected; 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 transformer T. 1A The second port of the secondary winding is connected; diode D 1C Its cathode is connected to the positive terminal V of the DC bus. o + Alternatively, the other end of the load is connected, with its anode connected to inductor port 1_A; 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_B.

[0043] The simplified power module S1 includes a transformer T. 1a diode D 1a and diode D 1b Transformer T 1a Its primary winding has two ports connected to the AC power supply V. ac1 Connected, its secondary winding's two ports 1_a and 1_b are the transformer secondary ports, and the transformer secondary ports 1_a and 1_b are connected to diode module J1; 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 transformer T. 1a Secondary side port 1_a is connected; 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 transformer T. 1a Secondary port 1_b is connected.

[0044] The diode module J1 includes four diodes: D a1 D b1 D c1 D d1 D a1 The anode is connected to the inductor port 1_A of the complete power module M1, and its cathode is connected to the transformer secondary port 1_a of the simplified power module S1; D b1The anode is connected to the inductor port 1_A of the complete power module M1, and its cathode is connected to the transformer secondary port 1_b of the simplified power module S1; D c1 The anode is connected to the inductor port 1_B of the complete power module M1, and its cathode is connected to the transformer secondary port 1_a of the simplified power module S1; D d1 The anode of J1 is connected to the inductor port 1_B of the complete power module M1, and its cathode is connected to the transformer secondary port 1_b of the simplified power module S1. The number of diodes in J1 is variable, ranging from 0 to 4.

[0045] For ease of understanding, Figure 1 Only a portion of the rectifier circuit of the entire module containing the current multiplier rectifier circuit is shown—M1, S1, and J1. Figure 1 Taking the displayed portion as an example, we will focus on the steady-state operation of the complete power module, the simplified power module, and the diode module working together. When the complete power module operates independently, it is a typical current-doubling and rectification process, so it will not be described in detail here.

[0046] For simplicity, assume that M1 and S1 use the same components, and transformer T 1A The first port of the primary winding and the first port of the secondary winding of the transformer are of the same 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: (1) Stage 1: v AC1 = +V AC1 v ac1 = +A·V AC1 In M1: D 1B Conduction, D 1A D 1C D 1D Deadline; In S1: D 1a Conduction, D 1b Deadline; J1: D b1 D d1 Conduction, D a1 D c1Deadline; (a)v AC1 via T 1A v ac1 via T 1a With L 1A D b1 D 1a DC bus or load, D 1B (b) v forms the first loop; ac1 via T 1a With L 1B D d1 D 1a DC bus or load, D 1B This forms the second loop.

[0047] (2) Stage 2: v AC1 = -V AC1 v ac1 = -A·V AC1 In M1: D 1A Conduction, D 1B D 1C D 1D Deadline; In S1: D 1b Conduction, D 1a Deadline; J1: D a1 D c1 Conduction, D b1 D d1 Deadline; (a)v ac1 via T 1a With L 1A D a1 D 1b DC bus or load, D 1A (b) v forms the first loop; AC1 via T 1A v ac1 via T 1a With L 1B D c1 D 1b DC bus or load, D 1A This forms the second loop.

[0048] As can be seen from the above work process, v ac1 via T 1a Either independent or with v AC1 via T 1A Power is supplied to the DC bus or load in series.

[0049] 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 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 = 1μF. Three cases are illustrated below. Case 1: A = 1.25; Case 2: A = 1; Case 3: A = 0.8.

[0050] Take L 1A = L 1B = 300 μH, 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 Example 1; (ii) when J1 is present, the number of its internal diodes affects both the output power and output voltage ripple of Example 1; (iii) v AC1 and v ac1 The amplitude difference or level difference also affects the output power and output voltage ripple of Example 1.

[0051] Utilizing the above characteristics, the number of diodes can be varied, increasing the flexibility of control in Embodiment 1. Suitable for Figure 1 The adjustment method for the circuit shown may include any combination of the following steps: Step 1: Increase or decrease the number of diode modules J1 (from 0 to 1). Step 2: Increase or decrease the number of diodes inside diode module J1 (0 to 4). Step 3: Change the AC power supply connected to the complete power module M1. AC1 The amplitude or level value; Step 4: Change the AC power supply connected to the simplified power module S1. ac1 The amplitude or level value.

[0052] Example 2 Reference Figure 4 A rectifier circuit including a current multiplier rectifier circuit module comprises at least one complete power module, at least one simplified power module, and at least one diode module. The complete power module, simplified power module, and diode module each have the same structure.

[0053] Among them, one complete power module is M1, one simplified power module is S1, and one diode module is J1.

[0054] The simplified power module S1 includes transformer T 2a Transformer T 2a Its primary winding has two ports connected to the AC power supply V. ac1 Connected, its two ports 1_a and 1_b of the secondary winding are the secondary ports of the transformer, transformer T 2a The intermediate tap of the secondary winding and the positive terminal V of the DC bus o + Alternatively, the other end of the load can be connected, and the secondary side ports 1_a and 1_b of the transformer can be connected to the diode module J1.

[0055] The complete power module M1 and diode module J1 in Embodiment 2 are the same as those in Embodiment 1. The remaining structure of Embodiment 2 is also the same as that of Embodiment 1.

[0056] For ease of understanding, Figure 4 Only a portion of the rectifier circuit of the entire module containing the current multiplier rectifier circuit is shown—M1, S1, and J1. Figure 4 Taking the displayed portion as an example, we will focus on the steady-state operation of the complete power module, the simplified power module, and the diode module working together. When the complete power module operates independently, it is a typical current-doubling and rectification process, so it will not be described in detail here.

[0057] For simplicity, assume that M1 and S1 use the same components, and transformer T 1A The first port of the primary winding and the first port of the secondary winding of the transformer are of the same name. Transformer T 2a The first port of the primary winding and its secondary port 1_a of the transformer are related by name. Take T... 2a The center tap of the secondary winding is the center tap; 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), i.e., v AC1 and v ac1The amplitude or level value, frequency or period T1 are the same, but the phase is different. This will be illustrated using B = 1 / 2 as an example. Figure 4 One operating cycle T1 of the circuit shown can be divided into two stages, and a typical operating condition is as follows: (1) Stage 1: v AC1 = +V AC1 v ac1 = -V AC1 In M1: D 1B Conduction, D 1A D 1C D 1D Deadline; J1: D a1 D c1 Conduction, D b1 D d1 Deadline; (a)v AC1 via T 1A v ac1 via T 2a With L 1A D a1 DC bus or load, D 1B (b) v forms the first loop; ac1 via T 2a With L 1B D c1 DC bus or load, D 1B This forms the second loop.

[0058] (2) Stage 2: v AC1 = -V AC1 v ac1 = +V AC1 In M1: D 1A Conduction, D 1B D 1C D 1D Deadline; J1: D b1 D d1 Conduction, D a1 D c1 Deadline; (a)v ac1 via T 2a With L 1A D b1 DC bus or load, D 1A (b) v forms the first loop; AC1 via T 1A v ac1 via T 2a With L 1B D d1DC bus or load, D 1A This forms the second loop.

[0059] As can be seen from the above work process, v ac1 via T 2a Either independent or with v AC1 via T 1A Power is supplied to the DC bus or load in series.

[0060] 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 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; Case 2: B = 0.25; Case 3: B = 0.5.

[0061] Take L 1A = L 1B = 300 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.

[0062] Utilizing the above characteristics, the number of diodes can be varied, increasing the flexibility of control in Embodiment 2. Suitable for Figure 4 The adjustment method for the circuit shown may include any combination of the following steps: Step 1: Increase or decrease the number of diode modules J1 (from 0 to 1). Step 2: Increase or decrease the number of diodes inside diode module J1 (0 to 4). Step 3: Change the AC power supply connected to the complete power module M1. AC1 The phase; Step 4: Change the AC power supply connected to the simplified power module S1. ac1 The phase (B·T1).

[0063] Example 3 Reference Figure 7 A rectifier circuit including a current multiplier rectifier circuit module comprises at least one complete power module, at least one simplified power module, and at least one diode module. The complete power module, simplified power module, and diode module each have the same structure.

[0064] Among them, one complete power module is M1, one simplified power module is S1, and one diode module is J1.

[0065] The complete power module M1 is the same as that in Embodiment 1.

[0066] 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's center tap is the transformer secondary winding center port 1_c, and the transformer secondary winding center port 1_c is connected to diode module J1; diode D 3a 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 transformer T. 3a The first port of the secondary winding is connected; diode D 3b 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 transformer T. 3a The second port of the secondary winding is connected.

[0067] The diode module J1 includes two diodes: D a2 and D b2 D a2 The anode is connected to the inductor port 1_A of the complete power module M1, and its cathode is connected to the intermediate port 1_c of the transformer secondary side of the simplified power module S1; D b2The anode of J1 is connected to the inductor port 1_B of the complete power module M1, and its cathode is connected to the intermediate port 1_c of the transformer secondary side of the simplified power module S1. The number of diodes in J1 is variable, ranging from 0 to 2.

[0068] The remaining structure of Example 3 is the same as that of Example 1.

[0069] For ease of understanding, Figure 7 Only a portion of the rectifier circuit of the entire module containing the current multiplier rectifier circuit is shown—M1, S1, and J1. Figure 7 Taking the displayed portion as an example, we will focus on the steady-state operation of the complete power module, the simplified power module, and the diode module working together. When the complete power module operates independently, it is a typical current-doubling and rectification process, so it will not be described in detail here.

[0070] For simplicity, assume that M1 and S1 use the same components, and transformer T 1A The first port of the primary winding and the first port of the secondary winding of the transformer are of the same name. Transformer T 3a The first port of the primary winding and the first port of the secondary winding of the transformer are of the same name. Let T be the terminal number. 3a The center tap of the secondary winding is the center tap; the AC power supply V connected to M1 AC1 A two-level AC power supply (+V) AC1 -V AC1 The AC power supply V connected to S1 has a period of T1. ac1 (t) = v AC1 (a·t), i.e., v AC1 and v ac1 The amplitude or level value and initial phase are the same, but the frequency or period is different. Let's take a = 2 as an example to illustrate this. Figure 7 One operating cycle T1 of the circuit shown can be divided into 4 stages, and a typical operating condition is as follows: (1) Stage 1: v AC1 = +V AC1 v ac1 = +V AC1 In M1: D 1B Conduction, D 1A D 1C D 1D Deadline; In S1: D 3a Conduction, D 3b Deadline; J1: D a2 D b2 Conductive; (a)v AC1 via T 1A vac1 via T 3a With L 1A D a2 D 3a DC bus or load, D 1B (b) v forms the first loop; ac1 via T 3a With L 1B D b2 D 3a DC bus or load, D 1B This forms the second loop.

[0071] (2) Stage 2: v AC1 = +V AC1 v ac1 = -V AC1 In M1: D 1B Conduction, D 1A D 1C D 1D Deadline; In S1: D 3b Conduction, D 3a Deadline; J1: D a2 D b2 Conductive; (a)v AC1 via T 1A v ac1 via T 3a With L 1A D a2 D 3b DC bus or load, D 1B (b) v forms the first loop; ac1 via T 3a With L 1B D b2 D 3b DC bus or load, D 1B This forms the second loop.

[0072] (3) Stage 3: v AC1 = -V AC1 v ac1 = +V AC1 In M1: D 1A Conduction, D 1B D 1C D 1D Deadline; In S1: D 3a Conduction, D 3b Deadline; J1: D a2 Db2 Conductive; (a)v ac1 via T 3a With L 1A D a2 D 3a DC bus or load, D 1A (b) v forms the first loop; AC1 via T 1A v ac1 via T 3a With L 1B D b2 D 3a DC bus or load, D 1A This forms the second loop.

[0073] (4) Stage 4: v AC1 = -V AC1 v ac1 = -V AC1 In M1: D 1A Conduction, D 1B D 1C D 1D Deadline; In S1: D 3b Conduction, D 3a Deadline; J1: D a2 D b2 Conductive; (a)v ac1 via T 3a With L 1A D a2 D 3b DC bus or load, D 1A (b) v forms the first loop; AC1 via T 1A v ac1 via T 3a With L 1B D b2 D 3b DC bus or load, D 1A This forms the second loop.

[0074] As can be seen from the above work process, v ac1 via T 3a Either independent or with v AC1 via T 1A Power is supplied to the DC bus or load in series.

[0075] The operation of J1 with only one diode is similar to that described above and will not be repeated. To better understand the impact of J1 on the overall circuit adjustability, 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 3a 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 = 0.5; Case 2: a = 1; Case 3: a = 2.

[0076] Take L 1A = L 1B = 300 μH, Figure 8 The output power performance of Embodiment 3 of the present invention is given under the above three conditions. Figure 9 The output voltage ripple performance of Embodiment 3 of the present invention is given under the above three conditions. Figure 8 and Figure 9 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 3; (ii) when J1 is present, the number of its internal diodes affects both the output power and output voltage ripple of Example 3; (iii) v AC1 and v ac1 The frequency difference or period difference also affects the output power and output voltage ripple of Example 3.

[0077] Utilizing the above characteristics, the number of diodes can be varied, increasing the flexibility of control in Embodiment 3. Suitable for Figure 7 The adjustment method for the circuit shown may include any combination of the following steps: Step 1: Increase or decrease the number of diode modules J1 (from 0 to 1). Step 2: Increase or decrease the number of diodes inside diode module J1 (0 to 2). Step 3: Change the AC power supply connected to the complete power module M1. AC1 The frequency or period (T1); Step 4: Change the AC power supply connected to the simplified power module S1. ac1 The frequency or period (T1 / a).

[0078] Example 4 Reference Figure 10A rectifier circuit including a current multiplier rectifier circuit module comprises at least one complete power module, at least one simplified power module, and at least one diode module. The complete power module, simplified power module, and diode module each have the same structure.

[0079] Among them, one complete power module is M1, one simplified power module is S1, and one diode module is J1.

[0080] The complete power module M1 includes a transformer T. 2A Inductor L 2A Inductor L 2B diode D 2A diode D 2B diode D 2C and diode D 2D Transformer T 2A Its primary winding has two ports connected to the AC power supply V. AC1 Connected; Inductance L 2A One end of it is connected to transformer T 2A The first port of the secondary winding is connected, and the other end is the inductor port 1_A, which is connected to the diode module J1; the inductor L 2B One end of it is connected to transformer T 2A The second port of the secondary winding is connected, and its other end is the inductor port 1_B, which is connected to the diode module J1; diode D 2A 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 transformer T. 2A The first port of the secondary winding is connected; diode D 2B 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 transformer T. 2A The second port of the secondary winding is connected; diode D 2C 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_A; diode D 2D 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_B.

[0081] The simplified power module S1 includes a transformer T. 4a diode D 4a and D 4b Transformer T 4a Its primary winding has two ports connected to the AC power supply V.ac1 Connected, its secondary winding's two ports 1_a and 1_b are the transformer secondary ports, and the transformer secondary ports 1_a and 1_b are connected to diode module J1; diode D 4a 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 4b Its anode is connected to the negative terminal V of the DC bus. o - It can be connected to one end of the load, and its cathode is connected to the secondary side port 1_b of the transformer.

[0082] The diode module J1 includes four diodes: D a3 D b3 D c3 D d3 D a3 The cathode is connected to the inductor port 1_A of the complete power module M1, and its anode is connected to the transformer secondary port 1_a of the simplified power module S1; D b3 The cathode is connected to the inductor port 1_A of the complete power module M1, and its anode is connected to the transformer secondary port 1_b of the simplified power module S1; D c3 The cathode is connected to the inductor port 1_B of the complete power module M1, and its anode is connected to the transformer secondary port 1_a of the simplified power module S1; D d3 The cathode of J1 is connected to the inductor port 1_B of the complete power module M1, and its anode is connected to the transformer secondary port 1_b of the simplified power module S1. The number of diodes in J1 is variable, ranging from 0 to 4.

[0083] Structurally, Example 4 and Example 1 are reciprocal. Except for the opposite direction of some currents, their operating processes and performances are basically the same, and the applicable adjustment methods are also identical. Therefore, further details are omitted.

[0084] Example 5 Reference Figure 11 A rectifier circuit including a current multiplier rectifier circuit module comprises at least one complete power module, at least one simplified power module, and at least one diode module. The complete power module, simplified power module, and diode module each have the same structure.

[0085] Among them, one complete power module is M1, one simplified power module is S1, and one diode module is J1.

[0086] The simplified power module J1 includes a transformer T. 5a The transformer T 5a Its primary winding has two ports connected to the AC power supply V.ac1 Connected, its two ports 1_a and 1_b of the secondary winding are the secondary ports of the transformer, and the center tap of its secondary winding is connected to the negative terminal V of the DC bus. o - Alternatively, one end of the load can be connected, and the secondary side ports 1_a and 1_b of the transformer can be connected to the diode module J1.

[0087] The remaining structure of Example 5 is the same as that of Example 4.

[0088] Structurally, Embodiment 5 and Embodiment 2 are reciprocal. Except for the opposite direction of some currents, their operating processes and performance are basically the same, and the applicable adjustment methods are also identical. Therefore, further details are omitted.

[0089] Example 6 Reference Figure 12 A rectifier circuit including a current multiplier rectifier circuit module comprises at least one complete power module, at least one simplified power module, and at least one diode module. The complete power module, simplified power module, and diode module each have the same structure.

[0090] Among them, one complete power module is M1, one simplified power module is S1, and one diode module is J1.

[0091] The simplified power module S1 includes a transformer T. 6a diode D 6a and D 6b Transformer T 6a Its primary winding has two ports connected to the AC power supply V. ac1 Connected, its secondary winding's center tap is the transformer secondary winding center port 1_c, and the transformer secondary winding center port 1_c is connected to diode module J1; diode D 6a 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 transformer T. 6a The first port of the secondary winding is connected; diode D 6b 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 transformer T. 6a The second port of the secondary winding is connected.

[0092] The diode module J1 includes diode D. a4 and diode D b4 D a4 The cathode is connected to the inductor port 1_A of the complete power module M1, and its anode is connected to the intermediate port 1_c of the transformer secondary side of the simplified power module S1; D b4The cathode of J1 is connected to the inductor port 1_B of the complete power module M1, and its anode is connected to the intermediate port 1_c of the transformer secondary side of the simplified power module S1. The number of diodes in J1 is variable, ranging from 0 to 2.

[0093] The remaining structure of Example 6 is the same as that of Example 4.

[0094] Structurally, Embodiment 6 and Embodiment 3 are reciprocal. Except for the opposite direction of some currents, their operating processes and performance are basically the same, and the applicable adjustment methods are also identical. Therefore, further details are omitted.

[0095] 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, 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 (e.g., number of turns on the primary and secondary sides, magnetizing inductance, relationship between same and different terminals, position of the center tap, etc.) in the complete power module and the simplified power module can be the same or different; a complete power module can be connected to multiple diode modules; a simplified power module can also be connected to multiple diode modules. The embodiments described in this specification are merely examples of implementations of the inventive concept, and the scope of protection of this invention should not be considered limited to the specific forms stated in the embodiments. 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 current multiplier rectifier circuit module, characterized in that: The rectifier circuit containing the current multiplier rectifier circuit module includes one complete power module, at least one simplified power module, and at least one diode module; The complete power module includes one transformer, two inductors, and four diodes: The transformer of the complete power module has two ports of its primary winding connected to an AC power source; The first inductor of the complete power module has one end connected to the first port of the secondary winding of the transformer of the complete power module, and the other end is the first inductor port of the complete power module. The second inductor of the complete power module has one end connected to the second port of the secondary winding of the transformer of the complete power module, and the other end is the second inductor port of the complete power module. The anode of the first diode in the complete 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 port of the secondary winding of the transformer in the complete power module. The second diode of the complete 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 second port of the secondary winding of the transformer of the complete power module. The third diode of the complete 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 complete power module. The fourth diode of the complete 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 complete power module. The simplified power module includes one transformer and two diodes: The transformer of the simplified 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 simplified power module. The cathode of the first diode of the simplified 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 simplified power module. The cathode of the second diode in the simplified 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 simplified 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 of the complete power module, and the cathode of the diode in the diode module is connected to any transformer secondary port of the simplified power module.

2. The rectifier circuit with a current multiplier rectifier circuit module as described in claim 1, characterized in that: The simplified power module includes one transformer: The transformer of the simplified 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 simplified power module transformer. The middle tap of its secondary winding is connected to the positive terminal of the DC bus or the other end of the load.

3. The rectifier circuit containing a current multiplier rectifier circuit module as described in claim 1 or 2, characterized in that: The simplified power module includes one transformer and two diodes: The transformer of the simplified power module has two ports of its primary winding connected to the AC power supply, and the middle tap of its secondary winding is the middle port of the secondary side of the transformer of the simplified power module. The cathode of the first diode of the simplified 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 simplified power module. The cathode of the second diode in the simplified 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 simplified power module. The cathode of the diode in the diode module is connected to the middle port of the secondary side of the transformer in the simplified power module.

4. A rectifier circuit containing a current multiplier rectifier circuit module, characterized in that: The rectifier circuit containing the current multiplier rectifier circuit module includes one complete power module, at least one simplified power module, and at least one diode module; The complete power module includes one transformer, two inductors, and four diodes: The transformer of the complete power module has two ports of its primary winding connected to an AC power source; The first inductor of the complete power module has one end connected to the first port of the secondary winding of the transformer of the complete power module, and the other end is the first inductor port of the complete power module. The second inductor of the complete power module has one end connected to the second port of the secondary winding of the transformer of the complete power module, and the other end is the second inductor port of the complete power module. The cathode of the first diode of the complete 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 port of the secondary winding of the transformer of the complete power module. The cathode of the second diode of the complete 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 port of the secondary winding of the transformer of the complete power module. The third diode of the complete 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 first inductor port of the complete power module. The fourth diode of the complete 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 second inductor port of the complete power module. The simplified power module includes one transformer and two diodes: The transformer of the simplified 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 simplified power module. The anode of the first diode in the simplified 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 in the simplified power module. The second diode of the simplified 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 simplified power module. The diode module includes at least one diode: The cathode of the diode in the diode module is connected to any inductor port of the complete power module, and the anode of the diode in the diode module is connected to any transformer secondary port of the simplified power module.

5. The rectifier circuit with a current multiplier rectifier circuit module as described in claim 4, characterized in that: The simplified power module includes one transformer: The transformer of the simplified 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 simplified power module transformer. The middle tap of its secondary winding is connected to the negative terminal of the DC bus or one end of the load.

6. The rectifier circuit containing a current multiplier rectifier circuit module as described in claim 4 or 5, characterized in that: The simplified power module includes one transformer and two diodes: The transformer of the simplified power module has two ports of its primary winding connected to the AC power supply, and the middle tap of its secondary winding is the middle port of the secondary side of the transformer of the simplified power module. The anode of the first diode in the simplified 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 in the simplified power module. The second diode of the simplified 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 simplified power module. The anode of the diode in the diode module is reconnected to the middle port of the transformer secondary side of the simplified power module.

7. A rectifier circuit containing a current multiplier rectifier circuit module, characterized in that: The rectifier circuit containing the current multiplier rectifier circuit module is any combination of claims 1 to 6.

8. The rectifier circuit with a current multiplier rectifier circuit module as described in claim 7, characterized in that: The number of diodes in the diode module is variable.

9. The rectifier circuit with a current multiplier rectifier circuit module as described in claim 7, characterized in that: A complete power module is connected to at least one diode module; or / and a simplified power module is connected to at least one diode module.

10. A method for adjusting a rectifier circuit containing a current multiplier rectifier circuit module as described in any one 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 complete power module or / and simplify the 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 complete power module; Step 4: Change the operating parameters of the AC power supply connected to the simplified power module.

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