Voltage doubling circuit

Abstract

The invention provides a voltage doubling circuit which can be applied to the technical field of power electronics. The voltage doubling circuit comprises a transformer module, the primary side of the transformer module is configured to be connected with a power supply module, and the transformer module is configured to perform voltage transformation processing based on an alternating current input voltage provided by the power supply module to obtain a first voltage; the rectification module is configured to be connected with the secondary side of the transformer module, the rectification module is configured to perform rectification processing on the first voltage to obtain a second voltage, and the second voltage is provided for the load through the voltage doubling module; and the voltage-multiplying module is configured to be connected with the secondary side of the transformer module, and the voltage-multiplying module is configured to perform voltage-multiplying processing on the first voltage to obtain a third voltage and provide the third voltage for a load.

Description

Technical Field

[0001] The present disclosure relates to the field of power electronics technology, and more specifically, to a voltage doubling circuit. Background Art

[0002] The high voltage-boosting ratio voltage-doubling circuit is a key core component of a high-frequency high-voltage power supply. It consists of a high-frequency boost transformer and a voltage-doubling rectifier circuit. The high-frequency transformer converts low-voltage high-frequency AC power into medium-voltage high-frequency AC power, which is then converted into high-voltage DC power for output by the voltage-doubling rectifier circuit. The transformer turns ratio of the high-frequency transformer and the number of stages of the voltage-doubling rectifier circuit will affect the output voltage level of the high-voltage DC power supply.

[0003] At present, commonly used voltage doubler circuits include half-wave voltage doubler rectifier circuits, full-wave voltage doubler rectifier circuits, etc. Among them, the output voltage establishment time of the half-wave voltage doubler rectifier circuit is longer and the output voltage ripple is larger, which is suitable for low-power high-voltage power supply applications; the full-wave voltage doubler rectifier circuit can charge and discharge the high-voltage capacitor twice in one switching cycle, so it has the advantage of low voltage ripple.

[0004] In the process of realizing the concept of the present disclosure, the inventors found that in the related art, the commonly used voltage doubler rectifier circuit has the problem that the output voltage decreases and the load capacity decreases as the load increases. Summary of the invention

[0005] In view of this, the present disclosure provides a voltage doubling circuit.

[0006] According to an embodiment of the present disclosure, a voltage doubling circuit includes:

[0007] A transformer module, wherein the primary side of the transformer module is configured to be connected to the power module, and the transformer module is configured to obtain a first voltage based on a voltage transformation process on an AC input voltage provided by the power module;

[0008] a rectifier module, the rectifier module being configured to be connected to the secondary side of the transformer module, the rectifier module being configured to rectify the first voltage to obtain a second voltage, and provide the second voltage to the load through the voltage doubling module; and

[0009] The voltage doubling module is configured to be connected to the secondary side of the transformer module, and the voltage doubling module is configured to double the first voltage to obtain a third voltage, and provide the third voltage to the load.

[0010] According to an embodiment of the present disclosure, the transformer module includes a three-phase transformer unit, and the three-phase transformer unit includes a first transformer, a second transformer and a third transformer.

[0011] According to an embodiment of the present disclosure, the primary winding of the three-phase transformer unit is configured to be connected in a triangle manner, and the secondary winding of the three-phase transformer unit is configured to be connected in a star manner;

[0012] The first end of the primary side of the first transformer, the first end of the primary side of the second transformer and the first end of the primary side of the third transformer are respectively configured to be connected to the power module, the first end of the primary side of the first transformer is configured to be connected to the second end of the primary side of the third transformer, the second end of the primary side of the first transformer is configured to be connected to the first end of the primary side of the second transformer, and the second end of the primary side of the second transformer is configured to be connected to the first end of the primary side of the third transformer;

[0013] The first end of the secondary side of the first transformer, the first end of the secondary side of the second transformer and the first end of the secondary side of the third transformer are respectively configured to connect the rectifier module and the voltage doubler module, and the second end of the secondary side of the first transformer, the second end of the secondary side of the second transformer and the second end of the secondary side of the third transformer are configured to be connected to each other.

[0014] According to an embodiment of the present disclosure, the primary winding of the three-phase transformer unit is configured to be connected in a star manner, and the secondary winding of the three-phase transformer unit is configured to be connected in a delta manner;

[0015] The first end of the primary side of the first transformer, the first end of the primary side of the second transformer and the first end of the primary side of the third transformer are respectively configured to be connected to the power module, and the second end of the primary side of the first transformer, the second end of the primary side of the second transformer and the second end of the primary side of the third transformer are configured to be connected to each other;

[0016] The first end of the secondary side of the first transformer, the first end of the secondary side of the second transformer and the first end of the secondary side of the third transformer are respectively configured to connect to the rectifier module and the voltage doubler module, the first end of the secondary side of the first transformer is configured to connect to the second end of the secondary side of the third transformer, the second end of the secondary side of the first transformer is configured to connect to the first end of the secondary side of the second transformer, and the second end of the secondary side of the second transformer is configured to connect to the first end of the secondary side of the third transformer.

[0017] According to an embodiment of the present disclosure, the power module includes a three-phase power supply unit, and the three-phase power supply unit includes a first AC voltage source, a second AC voltage source, and a third AC voltage source;

[0018] Among them, the first end of the above-mentioned first AC voltage source, the first end of the above-mentioned second AC voltage source and the first end of the above-mentioned third AC voltage source are configured to be connected to each other, the second end of the above-mentioned first AC voltage source is configured to be connected to the first end of the primary side of the above-mentioned first transformer, the second end of the above-mentioned second AC voltage source is configured to be connected to the first end of the primary side of the above-mentioned second transformer, and the second end of the above-mentioned third AC voltage source is configured to be connected to the first end of the primary side of the above-mentioned third transformer.

[0019] According to an embodiment of the present disclosure, the phase difference between the output voltage of the first AC voltage source, the output voltage of the second AC voltage source, and the output voltage of the third AC voltage source is configured to be 120°.

[0020] According to an embodiment of the present disclosure, the above-mentioned rectifier module includes a first bridge arm, a second bridge arm, a third bridge arm and a first capacitor;

[0021] Among them, the first end of the above-mentioned first bridge arm, the first end of the above-mentioned second bridge arm and the first end of the above-mentioned third bridge arm are configured to be connected to each other and connected to the first end of the above-mentioned first capacitor, the second end of the above-mentioned first bridge arm, the second end of the above-mentioned second bridge arm and the second end of the above-mentioned third bridge arm are configured to be connected to each other and connected to the second end of the above-mentioned first capacitor, the midpoint of the above-mentioned first bridge arm is configured to be connected to the first end of the secondary side of the above-mentioned first transformer, the midpoint of the above-mentioned second bridge arm is configured to be connected to the first end of the secondary side of the above-mentioned second transformer, the midpoint of the above-mentioned third bridge arm is configured to be connected to the first end of the secondary side of the above-mentioned third transformer, the first end of the above-mentioned first capacitor is configured to be grounded, and the second end of the above-mentioned first capacitor is configured to be connected to the above-mentioned rectifier module.

[0022] According to an embodiment of the present disclosure, the first bridge arm includes a first diode and a second diode, the anode of the first diode is configured to be connected to the first end of the first bridge arm, the cathode of the first diode is configured to be connected to the midpoint of the first bridge arm and the anode of the second diode respectively, and the cathode of the second diode is configured to be connected to the second end of the first bridge arm;

[0023] The second bridge arm includes a third diode and a fourth diode, the anode of the third diode is configured to be connected to the first end of the second bridge arm, the cathode of the third diode is configured to be connected to the midpoint of the second bridge arm and the anode of the fourth diode respectively, and the cathode of the fourth diode is configured to be connected to the second end of the second bridge arm; and

[0024] The above-mentioned third bridge arm includes a fifth diode and a sixth diode, the anode of the above-mentioned fifth diode is configured to be connected to the first end of the above-mentioned third bridge arm, the cathode of the above-mentioned fifth diode is configured to be connected to the midpoint of the above-mentioned third bridge arm and the anode of the above-mentioned sixth diode respectively, and the cathode of the above-mentioned sixth diode is configured to be connected to the second end of the above-mentioned third bridge arm.

[0025] According to an embodiment of the present disclosure, the voltage doubling module includes n voltage doubling units, wherein n is a positive integer greater than 1;

[0026] The first end of the i-th voltage doubling unit is configured to be connected to the fifth end of the i-1th voltage doubling unit, the second end of the i-th voltage doubling unit is configured to be connected to the sixth end of the i-1th voltage doubling unit, the third end of the i-th voltage doubling unit is configured to be connected to the seventh end of the i-1th voltage doubling unit, and the fourth end of the i-th voltage doubling unit is configured to be connected to the eighth end of the i-1th voltage doubling unit, wherein the i is a positive integer less than or equal to the n;

[0027] The first end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the first transformer, the second end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the second transformer, the third end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the third transformer, and the fourth end of the first voltage doubler unit is configured to be connected to the rectifier unit; and

[0028] The eighth terminal of the nth voltage doubling unit is configured to be connected to the positive electrode of the load.

[0029] According to an embodiment of the present disclosure, the voltage doubling unit includes a fourth bridge arm, a fifth bridge arm, a sixth bridge arm, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor;

[0030] Among them, the first end of the above-mentioned fourth bridge arm, the first end of the above-mentioned fifth bridge arm and the first end of the above-mentioned sixth bridge arm are configured to be connected to each other, and are respectively connected to the fourth end of the above-mentioned voltage doubling unit and the first end of the above-mentioned second capacitor, the second end of the above-mentioned fourth bridge arm, the second end of the above-mentioned fifth bridge arm and the second end of the above-mentioned sixth bridge arm are configured to be connected to each other, and are respectively connected to the eighth end of the above-mentioned voltage doubling unit and the second end of the above-mentioned second capacitor, the midpoint of the above-mentioned fourth bridge arm is configured to be respectively connected to the second end of the above-mentioned third capacitor and the fifth end of the above-mentioned voltage doubling unit, the midpoint of the above-mentioned fifth bridge arm is configured to be respectively connected to the second end of the above-mentioned fourth capacitor and the sixth end of the above-mentioned voltage doubling unit, the midpoint of the above-mentioned sixth bridge arm is configured to be respectively connected to the second end of the above-mentioned fifth capacitor and the seventh end of the above-mentioned voltage doubling unit, the first end of the above-mentioned third capacitor is configured to be connected to the first end of the above-mentioned voltage doubling unit, the first end of the above-mentioned fourth capacitor is configured to be connected to the second end of the above-mentioned voltage doubling unit, and the first end of the above-mentioned fifth capacitor is configured to be connected to the third end of the above-mentioned voltage doubling unit.

[0031] According to an embodiment of the present disclosure, the fourth bridge arm includes a seventh diode and an eighth diode, the anode of the seventh diode is configured to be connected to the first end of the fourth bridge arm, the cathode of the seventh diode is configured to be connected to the midpoint of the fourth bridge arm and the anode of the eighth diode respectively, and the cathode of the eighth diode is configured to be connected to the second end of the fourth bridge arm;

[0032] The fifth bridge arm includes a ninth diode and a tenth diode, the anode of the ninth diode is configured to be connected to the first end of the fifth bridge arm, the cathode of the ninth diode is configured to be connected to the midpoint of the fifth bridge arm and the anode of the tenth diode respectively, and the cathode of the tenth diode is configured to be connected to the second end of the fifth bridge arm; and

[0033] The above-mentioned sixth bridge arm includes an eleventh diode and a twelfth diode, the anode of the above-mentioned eleventh diode is configured to be connected to the first end of the above-mentioned sixth bridge arm, the cathode of the above-mentioned eleventh diode is configured to be connected to the midpoint of the above-mentioned sixth bridge arm and the anode of the above-mentioned twelfth diode respectively, and the cathode of the above-mentioned twelfth diode is configured to be connected to the second end of the above-mentioned sixth bridge arm.

[0034] According to the embodiments of the present disclosure, since the rectifier module and the voltage doubler module are used to supply power to the load respectively, the voltage of the load is made to be the sum of the second voltage and the third voltage. Therefore, while achieving the same voltage boost ratio as the traditional circuit, the number of voltage doubler stages of the voltage doubler module can be reduced, thereby improving the load capacity and dynamic response performance of the voltage doubler circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0036] Figure 1 A schematic diagram of a full-wave voltage doubler rectifier circuit in the related art is schematically shown;

[0037] Figure 2 A schematic diagram of a three-phase voltage doubler rectifier circuit in the related art is schematically shown;

[0038] Figure 3 A schematic diagram of a voltage doubling circuit according to an embodiment of the present disclosure is schematically shown;

[0039] Figure 4 A schematic diagram of a voltage doubling circuit according to an embodiment of the present disclosure is schematically shown;

[0040] Figure 5 A schematic diagram schematically shows a voltage ripple according to an embodiment of the present disclosure;

[0041] Figure 6 A schematic diagram schematically illustrates the dynamic characteristics of a circuit according to an embodiment of the present disclosure;

[0042] Figure 7 A schematic diagram of another voltage doubling circuit according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0043] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0044] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0045] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0046] In the case of using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.). In the case of using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, or C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0047] Figure 1 The schematic diagram of a full-wave voltage doubler rectifier circuit in the related art is schematically shown.

[0048] like Figure 1 As shown, in the full-wave voltage doubler rectifier circuit, Vac can be an AC voltage source, T1 is a transformer, and the transformer turns ratio of T1 can be 1:N, wherein the AC voltage source is located on the primary side of the transformer T1. Other devices are located on the secondary side of the transformer T1, which may include a capacitor C x_1 , capacitor C y_1 , capacitor C x_n , capacitor C y_n , capacitor C1, capacitor C n , diode D x_1 、Diode D y_1 、Diode D x_2 、Diode D y_2 、Diode D x_2n-1 、Diode D y_2n-1 、Diode D x_2n 、Diode D y_2n , load R L , the output voltage can be expressed as V o1 .

[0049] The first voltage doubling unit may include a capacitor C x_1 , capacitor C y_1 、Diode D x_1 and diode D y_1, the voltage doubling unit of the latter stage can have the same structure as the voltage doubling unit of the first stage. Assuming that the entire voltage doubling circuit is composed of n-stage voltage doubling units in cascade, and the transformer turns ratio of the transformer is N, the step-up ratio of the entire voltage doubling circuit under no-load is Nn. By using a higher transformer turns ratio and more cascaded voltage doubling units, the entire voltage doubling circuit can achieve a higher step-up ratio. In the process of realizing the concept of the present disclosure, the inventors found that in the related art, the full-wave voltage doubling rectifier circuit has the following problems:

[0050] (1) Since the secondary side of the transformer requires a center tap structure, the transformer structure is complex and difficult to design. In addition, due to the voltage stress problem and the parasitic capacitance problem of multiple windings on the secondary side of the transformer, a higher manufacturing process and insulation protection technology are required;

[0051] (2) The output voltage build-up time is long and the output voltage ripple is large, which is not suitable for scenarios with high requirements for voltage dynamic characteristics;

[0052] (3) As the load increases, there is a problem of reduced output voltage and decreased load capacity.

[0053] Based on this, for applications with higher power, a multi-phase parallel three-phase voltage doubler rectifier circuit can be used. Since the output power of the three-phase voltage doubler rectifier circuit is provided by three identical circuits, it is more suitable for applications with higher power than a single-phase circuit. In addition, in actual applications, the input of the three-phase AC power supply is often staggered, that is, the three phases differ by 120° from each other, which can greatly reduce the output voltage ripple.

[0054] Figure 2 The schematic diagram of a three-phase voltage doubling rectifier circuit in the related art is schematically shown.

[0055] like Figure 2 As shown, in this three-phase voltage doubler rectifier circuit, V a can be a first AC voltage source, V b can be a second AC voltage source, V c can be a third AC voltage source, T1 can be a transformer, and the transformer turns ratio of T1 can be 1:N, wherein the first AC voltage source V a , the second AC voltage source V b and the third AC voltage source V c It can be located on the primary side of transformer T1. Other devices can be located on the secondary side of transformer T1, including capacitor C Ax_1 , capacitor C A_2 , capacitor C Bx_1 , capacitor C B_1 , capacitor C Cx_1 , capacitor C C_1 , capacitor CAx_n , capacitor C A_n , capacitor C Bx_n , capacitor C B_n , capacitor C Cx_n , capacitor C C_n . and may include a diode D Ax_1 、Diode D Ax_2 、Diode D Bx_1 、Diode D Bx_2 、Diode D Cx_1 、Diode D Cx_2 、Diode D Ax_2n-1 、Diode D Ax_2n 、Diode D Bx_2n-1 、Diode D Bx_2n 、Diode D Cx_2n-1 、Diode D Cx_2n , load R L , the output voltage can be expressed as V o2 .

[0056] However, in the process of implementing the inventive concept of the present disclosure, the inventors found that in the related art, the three-phase voltage doubler rectifier circuit has the following problems:

[0057] (1) The output voltage takes a long time to build up, so the dynamic voltage adjustment performance is poor;

[0058] (2) Similar to the full-wave voltage doubler rectifier circuit, there is a problem that as the load increases, the output voltage decreases and the load capacity decreases;

[0059] (3) In practical applications, it is difficult to ensure that the parameters of the three-phase voltage doubler rectifier circuit, especially the three transformers in the three-phase voltage doubler rectifier circuit, are exactly the same. Therefore, there are differences in the working characteristics of the three transformers, which makes the output current of the three-phase voltage doubler rectifier circuit unbalanced, making it difficult to achieve the required triple power output.

[0060] Therefore, the above-mentioned voltage doubler rectifier circuit is difficult to use in application scenarios with higher power, especially in scenarios with high requirements on output voltage dynamic response performance and output voltage ripple.

[0061] In view of this, in order to address the problems existing in the above-mentioned voltage doubler rectifier circuit in high-power application scenarios, the present disclosure proposes a voltage doubler circuit, which can achieve voltage and current balance between the three phases by improving the boost ratio of the voltage doubler circuit through a transformer module, and by connecting a rectifier module between the transformer module and the voltage doubler module, the number of capacitors in the circuit can be reduced, thereby improving the circuit's load capacity and dynamic response performance.

[0062] Specifically, an embodiment of the present disclosure provides a voltage doubling circuit, comprising:

[0063] A transformer module, wherein the primary side of the transformer module is configured to be connected to the power module, and the transformer module is configured to obtain a first voltage based on a voltage transformation process on an AC input voltage provided by the power module;

[0064] a rectifier module, the rectifier module being configured to be connected to the secondary side of the transformer module, the rectifier module being configured to rectify the first voltage to obtain a second voltage, and provide the second voltage to the load through the voltage doubling module; and

[0065] The voltage doubling module is configured to be connected to the secondary side of the transformer module, and the voltage doubling module is configured to double the first voltage to obtain a third voltage, and provide the third voltage to the load.

[0066] Figure 3 The schematic diagram of a voltage doubling circuit according to an embodiment of the present disclosure is schematically shown.

[0067] like Figure 3 As shown, the voltage doubling circuit of the embodiment of the present disclosure includes: a power module 10 , a transformer module 20 , a rectifier module 30 , a voltage doubling module 40 and a load 50 .

[0068] A transformer module 20, wherein the primary side of the transformer module 20 is configured to be connected to the power module 10, and the transformer module 20 is configured to obtain a first voltage based on a voltage transformation process of an AC input voltage provided by the power module 10;

[0069] A rectifier module 30, the rectifier module 30 is configured to be connected to the secondary side of the transformer module 20, the rectifier module 30 is configured to rectify the first voltage to obtain a second voltage, and provide the second voltage to the load 50 through the voltage doubling module 40; and

[0070] The voltage doubling module 40 is configured to be connected to the secondary side of the transformer module 20 . The voltage doubling module 40 is configured to double the first voltage to obtain a third voltage and provide the third voltage to the load 50 .

[0071] According to an embodiment of the present disclosure, the current input to the voltage doubling circuit can be transformed by the transformer module 20 to obtain a first voltage. For example, the transformer can be a step-up transformer, and the circuit input to the voltage doubling circuit can be stepped up by the step-up transformer to obtain a stepped-up first voltage. When the current input to the voltage doubling circuit by the power module 10 is alternating current, the stepped-up first voltage also corresponds to alternating current.

[0072] According to an embodiment of the present disclosure, the first voltage can be rectified by the rectifier module 30 to obtain a second voltage. For example, when the voltage module outputs alternating current, the first voltage also corresponds to alternating current. The first voltage can be rectified by the rectifier module 30 to convert the first voltage into direct current to obtain a second direct current voltage.

[0073] According to an embodiment of the present disclosure, for example, the second DC voltage may be delivered to the load 50 through the voltage doubling module 40 .

[0074] According to an embodiment of the present disclosure, the first voltage can be doubled by the voltage doubling module 40 to obtain a third voltage after doubled voltage. For example, when the voltage value of the first voltage is 5V, the first voltage can be doubled by the voltage doubling module 40 to obtain a third voltage of 10V.

[0075] According to an embodiment of the present disclosure, for example, the voltage doubling module 40 may also be configured to rectify the first voltage. Therefore, the voltage doubling module 40 may perform voltage doubling and rectification on the first AC voltage to obtain a third DC voltage.

[0076] According to an embodiment of the present disclosure, for example, the power module 10 can transmit a first voltage to the rectifier module 30 and the voltage doubling module 40, the rectifier module 30 rectifies the first voltage to obtain a second voltage, and then transmits the second voltage to the load 50 through the voltage doubling module 40, and the voltage doubling module 40 doubles the first voltage to obtain a third voltage, and then transmits the third voltage to the load 50, so as to realize transmitting the second voltage and the third voltage to the load 50 together.

[0077] According to the embodiments of the present disclosure, since the rectifier module 30 and the voltage doubler module 40 are used to supply power to the load 50 respectively, the voltage of the load 50 is the sum of the second voltage and the third voltage. Therefore, while achieving the same voltage boost ratio as the traditional circuit, the number of voltage doubler stages of the voltage doubler module 40 can be reduced, thereby improving the load capacity and dynamic response performance of the voltage doubler circuit.

[0078] According to an embodiment of the present disclosure, the transformer module 20 includes a three-phase transformer unit including a first transformer, a second transformer, and a third transformer.

[0079] According to an embodiment of the present disclosure, for example, the first transformer, the second transformer, and the third transformer may all be high-frequency transformers.

[0080] According to an embodiment of the present disclosure, for example, the first transformer, the second transformer and the third transformer may all be step-up transformers. In the case where the first transformer, the second transformer and the third transformer are all step-up transformers, the AC input voltage may be stepped up and the stepped-up AC input voltage may be delivered to the rectifier module 30 and the voltage doubling module 40.

[0081] According to an embodiment of the present disclosure, for example, the first transformer, the second transformer, and the third transformer may have the same transformer turns ratio. When the first transformer, the second transformer, and the third transformer are all step-up transformers and have the same transformer turns ratio, the same step-up process may be performed on the AC input voltage by the three-phase transformer. When the rectifier module 30 and the voltage doubling module 40 are also three-phase circuits, the same step-up process may be performed on the AC input voltage by three step-up transformers with the same transformer turns ratio.

[0082] According to an embodiment of the present disclosure, the primary winding of the three-phase transformer unit is configured to be connected in a delta manner, and the secondary winding of the three-phase transformer unit is configured to be connected in a star manner;

[0083] The first end of the primary side of the first transformer, the first end of the primary side of the second transformer and the first end of the primary side of the third transformer are respectively configured to be connected to the power module 10, the first end of the primary side of the first transformer is configured to be connected to the second end of the primary side of the third transformer, the second end of the primary side of the first transformer is configured to be connected to the first end of the primary side of the second transformer, and the second end of the primary side of the second transformer is configured to be connected to the first end of the primary side of the third transformer;

[0084] The first end of the secondary side of the first transformer, the first end of the secondary side of the second transformer and the first end of the secondary side of the third transformer are respectively configured to connect the rectifier module 30 and the voltage doubler module 40, and the second end of the secondary side of the first transformer, the second end of the secondary side of the second transformer and the second end of the secondary side of the third transformer are configured to be connected to each other.

[0085] According to an embodiment of the present disclosure, for example, one end where the power module is located may be the primary side of the first transformer, the second transformer and the third transformer, and one end where the rectifier module and the voltage doubler module are located may be the secondary side of the first transformer, the second transformer and the third transformer.

[0086] According to an embodiment of the present disclosure, for example, by configuring the primary winding of the three-phase transformer unit to be connected in a triangle manner, and configuring the secondary winding of the three-phase transformer unit to be connected in a star manner, the three-phase transformer unit can be made to step up the input AC input voltage. For example, in the three-phase transformer unit, when the transformer turns ratio of the first transformer, the second transformer, and the third transformer are all 1:1, by configuring the primary winding of the transformer to be connected in the above-mentioned triangle manner, and configuring the secondary winding of the transformer to be connected in the above-mentioned star manner, the voltage output in the three-phase transformer unit can be increased to 1 / 2 of the AC input voltage. times and reduces the current to the original times, so that the voltage doubling circuit can adapt to the scenario of higher voltage demand and lower current demand.

[0087] According to an embodiment of the present disclosure, the primary winding of the three-phase transformer unit is configured to be connected in a star manner, and the secondary winding of the three-phase transformer unit is configured to be connected in a delta manner;

[0088] The first end of the primary side of the first transformer, the first end of the primary side of the second transformer and the first end of the primary side of the third transformer are respectively configured to be connected to the power module 10, and the second end of the primary side of the first transformer, the second end of the primary side of the second transformer and the second end of the primary side of the third transformer are configured to be connected to each other;

[0089] The first end of the secondary side of the first transformer, the first end of the secondary side of the second transformer and the first end of the secondary side of the third transformer are respectively configured to connect to the rectifier module 30 and the voltage doubler module 40, the first end of the secondary side of the first transformer is configured to connect to the second end of the secondary side of the third transformer, the second end of the secondary side of the first transformer is configured to connect to the first end of the secondary side of the second transformer, and the second end of the secondary side of the second transformer is configured to connect to the first end of the secondary side of the third transformer.

[0090] According to an embodiment of the present disclosure, by configuring the primary winding of the three-phase transformer unit to be connected in a star configuration, and configuring the secondary winding of the three-phase transformer unit to be connected in a triangle configuration, the three-phase transformer unit can reduce the input AC input voltage. For example, in the three-phase transformer unit, when the transformer turns ratio of the first transformer, the second transformer, and the third transformer are all 1:1, by configuring the primary winding of the transformer to be connected in the above-mentioned star configuration, and configuring the secondary winding of the transformer to be connected in the above-mentioned triangle configuration, the voltage output by the transformer module 20 can be reduced to 1 / 2 of the AC input voltage. times, and increases the current to the original times, so that the voltage requirement of the voltage doubler circuit is lower and the current requirement is lower in high scenarios.

[0091] According to an embodiment of the present disclosure, for example, the primary winding of the three-phase transformer unit can be configured to be connected in a star manner, and the secondary winding of the three-phase transformer unit can be configured to be connected in a star manner, without changing the characteristics of the voltage and current, so that the voltage and current of the voltage doubler circuit meet the requirements. Alternatively, the primary winding of the three-phase transformer unit can be configured to be connected in a triangle manner, and the secondary winding of the three-phase transformer unit can be configured to be connected in a triangle manner, without changing the characteristics of the voltage and current, so that the voltage and current of the voltage doubler circuit meet the requirements.

[0092] According to an embodiment of the present disclosure, the power module 10 includes a three-phase power supply unit, which includes a first AC voltage source, a second AC voltage source, and a third AC voltage source;

[0093] Among them, the first end of the first AC voltage source, the first end of the second AC voltage source and the first end of the third AC voltage source are configured to be connected to each other, the second end of the first AC voltage source is configured to be connected to the first end of the primary side of the first transformer, the second end of the second AC voltage source is configured to be connected to the first end of the primary side of the second transformer, and the second end of the third AC voltage source is configured to be connected to the first end of the primary side of the third transformer.

[0094] According to an embodiment of the present disclosure, for example, a three-phase power supply unit can be connected in the above manner. When the primary side of the three-phase transformer unit is connected in a delta manner or in a star manner, the three-phase power supply unit connected in the above manner can transmit the three-phase voltage to the three-phase transformer unit connected in a delta manner or in a star manner.

[0095] According to an embodiment of the present disclosure, the phase difference among the output voltage of the first alternating current voltage source, the output voltage of the second alternating current voltage source, and the output voltage of the third alternating current voltage source is configured to be 120°.

[0096] According to an embodiment of the present disclosure, for example, by configuring the phase difference between the output voltage of the first AC voltage source, the output voltage of the second AC voltage source and the output voltage of the third AC voltage source to be 120°, a three-phase transformer unit can be configured to form an interleaved parallel working mode, thereby reducing voltage ripple.

[0097] According to an embodiment of the present disclosure, the rectifier module 30 includes a first bridge arm, a second bridge arm, a third bridge arm and a first capacitor;

[0098] Among them, the first end of the first bridge arm, the first end of the second bridge arm and the first end of the third bridge arm are configured to be connected to each other and connected to the first end of the first capacitor, the second end of the first bridge arm, the second end of the second bridge arm and the second end of the third bridge arm are configured to be connected to each other and connected to the second end of the first capacitor, the midpoint of the first bridge arm is configured to be connected to the first end of the secondary side of the first transformer, the midpoint of the second bridge arm is configured to be connected to the first end of the secondary side of the second transformer, the midpoint of the third bridge arm is configured to be connected to the first end of the secondary side of the third transformer, the first end of the first capacitor is configured to be grounded, and the second end of the first capacitor is configured to be connected to the rectifier module 30.

[0099] According to the embodiment of the present disclosure, the rectifier module 30 is connected to the three-phase transformer unit by the above connection method, so that the first voltage input to the rectifier module 30 by the three-phase transformer unit can be converted into a second DC voltage to achieve a rectification function. In addition, in the rectifier module 30, since only one capacitor is connected, the load capacity and dynamic response performance of the circuit are improved compared with the traditional circuit.

[0100] According to an embodiment of the present disclosure, the first bridge arm includes a first diode and a second diode, the anode of the first diode is configured to connect the first end of the first bridge arm, the cathode of the first diode is configured to connect the midpoint of the first bridge arm and the anode of the second diode respectively, and the cathode of the second diode is configured to connect the second end of the first bridge arm;

[0101] The second bridge arm includes a third diode and a fourth diode, the anode of the third diode is configured to be connected to the first end of the second bridge arm, the cathode of the third diode is configured to be connected to the midpoint of the second bridge arm and the anode of the fourth diode respectively, and the cathode of the fourth diode is configured to be connected to the second end of the second bridge arm; and

[0102] The third bridge arm includes a fifth diode and a sixth diode, the anode of the fifth diode is configured to be connected to the first end of the third bridge arm, the cathode of the fifth diode is configured to be connected to the midpoint of the third bridge arm and the anode of the sixth diode respectively, and the cathode of the sixth diode is configured to be connected to the second end of the third bridge arm.

[0103] According to an embodiment of the present disclosure, by using the above-mentioned connection method, the three bridge arms can be staggered in parallel with the three-phase transformer module 20, thereby rectifying the three-phase first voltage and providing the three-phase second voltage to the load 50 through the voltage doubling module 40.

[0104] According to an embodiment of the present disclosure, the voltage doubling module 40 includes n voltage doubling units, where n is a positive integer greater than 1;

[0105] wherein the first end of the i-th voltage multiplier unit is configured to be connected to the fifth end of the i-1-th voltage multiplier unit, the second end of the i-th voltage multiplier unit is configured to be connected to the sixth end of the i-1-th voltage multiplier unit, the third end of the i-th voltage multiplier unit is configured to be connected to the seventh end of the i-1-th voltage multiplier unit, and the fourth end of the i-th voltage multiplier unit is configured to be connected to the eighth end of the i-1-th voltage multiplier unit, wherein i is a positive integer less than or equal to n;

[0106] The first end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the first transformer, the second end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the second transformer, the third end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the third transformer, and the fourth end of the first voltage doubler unit is configured to be connected to the rectifier unit; and

[0107] The eighth terminal of the nth voltage multiplying unit is configured to be connected to the positive electrode of the load 50 .

[0108] According to an embodiment of the present disclosure, through the above connection method, n voltage doubling units can multiply the first voltage of the input voltage doubling module 40 by n times to obtain a third voltage, and through the above connection method, the second voltage and the third voltage can be transmitted to the load 50.

[0109] According to an embodiment of the present disclosure, the voltage doubling unit includes a fourth bridge arm, a fifth bridge arm, a sixth bridge arm, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor;

[0110] Among them, the first end of the fourth bridge arm, the first end of the fifth bridge arm and the first end of the sixth bridge arm are configured to be connected to each other, and are respectively connected to the fourth end of the voltage doubling unit and the first end of the second capacitor, the second end of the fourth bridge arm, the second end of the fifth bridge arm and the second end of the sixth bridge arm are configured to be connected to each other, and are respectively connected to the eighth end of the voltage doubling unit and the second end of the second capacitor, the midpoint of the fourth bridge arm is configured to be respectively connected to the second end of the third capacitor and the fifth end of the voltage doubling unit, the midpoint of the fifth bridge arm is configured to be respectively connected to the second end of the fourth capacitor and the sixth end of the voltage doubling unit, the midpoint of the sixth bridge arm is configured to be respectively connected to the second end of the fifth capacitor and the seventh end of the voltage doubling unit, the first end of the third capacitor is configured to be connected to the first end of the voltage doubling unit, the first end of the fourth capacitor is configured to be connected to the second end of the voltage doubling unit, and the first end of the fifth capacitor is configured to be connected to the third end of the voltage doubling unit.

[0111] According to the embodiments of the present disclosure, through the above connection method, a three-phase voltage doubling module 40 can be implemented, and then the voltage doubling of the three-phase voltage can be achieved.

[0112] According to an embodiment of the present disclosure, for example, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor can all be high-voltage capacitors. Since only one capacitor is connected to the rectifier module 30, and each voltage doubling unit is connected to four capacitors, compared with each voltage doubling unit, the rectifier module 30 is connected to three fewer capacitors, thereby improving the load capacity and dynamic response performance of the voltage doubling circuit.

[0113] According to an embodiment of the present disclosure, the fourth bridge arm includes a seventh diode and an eighth diode, the anode of the seventh diode is configured to be connected to the first end of the fourth bridge arm, the cathode of the seventh diode is configured to be connected to the midpoint of the fourth bridge arm and the anode of the eighth diode respectively, and the cathode of the eighth diode is configured to be connected to the second end of the fourth bridge arm;

[0114] The fifth bridge arm includes a ninth diode and a tenth diode, the anode of the ninth diode is configured to be connected to the first end of the fifth bridge arm, the cathode of the ninth diode is configured to be connected to the midpoint of the fifth bridge arm and the anode of the tenth diode respectively, and the cathode of the tenth diode is configured to be connected to the second end of the fifth bridge arm; and

[0115] The sixth bridge arm includes an eleventh diode and a twelfth diode, the anode of the eleventh diode is configured to be connected to the first end of the sixth bridge arm, the cathode of the eleventh diode is configured to be connected to the midpoint of the sixth bridge arm and the anode of the twelfth diode respectively, and the cathode of the twelfth diode is configured to be connected to the second end of the sixth bridge arm.

[0116] According to the embodiments of the present disclosure, the fourth bridge arm, the fifth bridge arm and the sixth bridge arm are formed by the above connection method, so that the three-phase voltage doubling module 40 can be realized, and then the voltage doubling of the three-phase voltage can be realized.

[0117] According to the embodiments of the present disclosure, for example, the actual number of phases of the voltage doubler circuit is not limited to the above three phases. For example, the voltage doubler circuit may be N-phase, the AC voltage source may be N, the phase difference between the output voltages of the N AC voltage sources may be 1 / N, the rectifier module 30 may include a capacitor and N bridge arms, and each voltage doubler unit of the voltage doubler module 40 may include N+1 capacitors and N bridge arms, where N is a positive integer.

[0118] According to an embodiment of the present disclosure, for example, when the voltage doubling circuit is a six-phase circuit, the transformer module 20 may include six AC voltage sources, the phase difference between the output voltages of the six AC voltage sources may be 60°, the rectifier module 30 may include one capacitor and six bridge arms, and the voltage doubling unit may have seven capacitors and six bridge arms. According to an embodiment of the present disclosure, the technical effects that can be achieved by the voltage doubling circuit provided by the embodiment of the present disclosure are embodied by comparison as follows.

[0119] Figure 4The schematic diagram of a voltage doubling circuit according to an embodiment of the present disclosure is schematically shown.

[0120] like Figure 4 As shown, the voltage doubling circuit of the embodiment of the present disclosure may include a power supply module, a transformer module, a rectifier module, a voltage doubling module and a load R L , the output voltage can be expressed as V o3 The power supply module may include a first AC voltage source V a ', the second AC voltage source V b ', the third AC voltage source V c The transformer module may include a first transformer T1, a second transformer T2 and a third transformer T3, wherein the first AC voltage source V a ', the second AC voltage source V b ' and the third AC voltage source V c The rectifier module may include a first diode D1, a second diode D2, and a second diode D3. 2、 The first-stage voltage doubling unit may include a second capacitor C2, a third capacitor C A_1 , the fourth capacitor C B_1 , the fifth capacitor C C_1 , and may include a seventh diode D A_1 , the eighth diode D A_2 、Ninth diode D B_1 , the tenth diode D B_2 11th diode D C_1 , the twelfth diode D C_2 The n-th voltage multiplication unit may include a second capacitor C n , the third capacitor C A_n-1 , the fourth capacitor C B_n-1 , the fifth capacitor C C_n-1 , and may include a seventh diode D A_2n-3 , the eighth diode D A_2n-2 、Ninth diode D B_2n-3 , the tenth diode D B_2n-2 11th diode D C_2n-3 , the twelfth diode D C_2n-2 The voltage doubling module may be composed of n-1 levels of voltage doubling units.

[0121] Due to the introduction of the three-phase rectifier circuit, the first transformer, the second transformer and the third transformer do not need a center tap structure, thereby simplifying the design requirements for the structure and insulation of the transformer. Since the first transformer T1, the second transformer T2 and the third transformer T3 adopt the primary triangle and the secondary star connection mode, and the first AC voltage source V a ', the second AC voltage source V b ', the third AC voltage source V c One end of V is connected to the first end of the primary side of the first transformer T1, the first end of the primary side of the second transformer T1 and the first end of the primary side of the third transformer T3 in the transformer module. Therefore, when a transformer with the same transformer turns ratio is used, V a '、V b '、V c The amplitude of ' is 1 / 3 of that of the full-wave voltage doubler rectifier circuit and 2 / 3 of that of the three-phase voltage doubler rectifier circuit; that is, if a voltage source with the same amplitude is used as input, the transformer turns ratio of the transformer module of the embodiment of the present invention is 1 / 3 of that of the full-wave voltage doubler rectifier circuit transformer and 2 / 3 of that of the three-phase voltage doubler rectifier circuit. Therefore, the number of winding turns on the secondary side of the transformer module can be greatly reduced, and the insulation requirements of the transformer can be reduced.

[0122] According to the embodiments of the present disclosure, in order to address the problems existing in full-wave voltage doubler rectifier circuits and three-phase voltage doubler rectifier circuits in high-power application scenarios, the voltage doubler circuit of the embodiments of the present disclosure adopts a three-phase staggered parallel structure. By connecting the primary side of the three-phase transformer unit in a triangle shape and the secondary side in a star shape, the voltage boost ratio of the voltage doubler circuit can be improved, and the three phases can have the same voltage and current. By connecting a rectifier module between the transformer module and the voltage doubler module, the number of capacitors in the charging and discharging circuit in the entire voltage doubler circuit can be reduced, thereby improving the circuit's load capacity and dynamic response performance.

[0123] According to the embodiments of the present disclosure, for the voltage doubler circuit of the embodiments of the present disclosure, assuming that the transformer turns ratio of the first transformer T1, the second transformer T2, and the third transformer T3 is N, then the total voltage boost ratio of the circuit after the three-phase rectifier circuit and the n-1-stage voltage doubler circuit can be N+N(n-1)=Nn. Compared with the three-phase voltage doubler rectifier circuit, the voltage doubler circuit of the embodiments of the present disclosure can reduce 3 high-voltage capacitors, and because 3 capacitors are reduced in the high-frequency charging and discharging circuit of the voltage doubler circuit of the embodiments of the present disclosure, the rectifier module has almost no voltage drop loss under different load conditions. For the voltage doubler circuit of the embodiments of the present disclosure, it can be known that when the load current is I o In the case of , compared with the no-load condition, the voltage drop of the voltage doubler circuit caused by load is:

[0124]

[0125] Among them, f is the frequency of the AC voltage input to the voltage doubler circuit, and C is the capacitance of the capacitor in the voltage doubler circuit.

[0126] For the full-wave voltage doubler rectifier circuit, when the load current is I o In the case of, the output voltage drop loss is:

[0127]

[0128] Among them, f is the frequency of the AC voltage input to the voltage doubler circuit, and C is the capacitance of the capacitor in the voltage doubler circuit.

[0129] For a three-phase voltage doubler rectifier circuit, when the load current is I o In the case of, the output voltage drop loss is:

[0130]

[0131] Among them, f is the frequency of the AC voltage input to the voltage doubler circuit, and C is the capacitance of the capacitor in the voltage doubler circuit.

[0132] It can be seen from this that as the circuit level n increases, the output voltage drop loss of the voltage doubler circuit of the embodiment of the present invention is greatly reduced compared with the above two circuits. Therefore, it has good load capacity and output voltage adjustment performance, and is more suitable for application scenarios with higher power than the above two circuits.

[0133] According to the embodiment of the present disclosure, for example, the full-wave voltage doubler rectifier circuit, the three-phase voltage doubler rectifier circuit and the voltage doubler circuit of the embodiment of the present disclosure are compared and analyzed through an embodiment below. The main parameters of the design embodiment are shown in Table 1, wherein the full-wave voltage doubler rectifier circuit and the three-phase voltage doubler rectifier circuit both adopt 4-level voltage doubler, and the voltage doubler circuit of the embodiment of the present disclosure adopts three-phase rectification and 3-level voltage doubler. In addition, the AC input voltage of the full-wave voltage doubler rectifier circuit is V ac =100V; Input V of three-phase voltage doubler rectifier circuit a 、V b 、V c It is 2 / 3 of the full-wave voltage doubler rectifier circuit, that is, V a =V b =V c =2 / 3V ac ; The AC input voltage V of the embodiment of the present disclosure a '、V b '、V c ' is 1 / 3 of the full-wave voltage doubler rectifier circuit, that is, V a '=V b '=V c '=1 / 3V ac .

[0134] Table 1 Main parameters of the circuit of the design embodiment

[0135] parameter Numeric Input voltage frequency 100kHz No-load output voltage 8kV Output Power 2kW Transformer turns ratio 20

[0136] Figure 5 A schematic diagram of a voltage ripple according to an embodiment of the present disclosure is schematically shown.

[0137] like Figure 5 As shown, in the steady state, V o1 is the output voltage of the full-wave voltage doubler rectifier circuit, V o2 is the output voltage of the three-phase voltage doubler rectifier circuit, V o3 is the output voltage of the voltage doubler circuit of the embodiment of the present disclosure. It can be seen that, when a transformer with the same transformer turns ratio is used, the voltage ripple of the voltage doubler circuit of the embodiment of the present disclosure is the smallest, about 11.7V, and the voltage ripple of the full-wave voltage doubler rectifier circuit is the largest, about 39.2V. In addition, due to the use of a three-phase staggered parallel working mode, V o2 and V o3 The ripple frequency is V o1 1.5 times of.

[0138] Figure 6 The diagram schematically shows the dynamic characteristics of a circuit according to an embodiment of the present disclosure.

[0139] like Figure 6 As shown, when the above three circuits have the same parameters, it can be seen that the voltage doubler circuit of the embodiment of the present disclosure has a shorter transient response time of about 480us, while the full-wave voltage doubler rectifier circuit and the three-phase voltage doubler rectifier circuit are about 660us and 710us respectively. Therefore, the voltage doubler circuit of the embodiment of the present disclosure has better dynamic characteristics than the above two circuits.

[0140] And, if Figure 6 As shown, for the no-load output condition of 8kV, the output voltage drop of the voltage doubler circuit of the embodiment of the present disclosure under load is about 80V, while the voltage doubler rectifier circuit and the three-phase voltage doubler rectifier circuit are approximately 375V and 320V, respectively, which are much higher than the voltage doubler circuit of the embodiment of the present disclosure. It can be seen that the voltage doubler circuit of the embodiment of the present disclosure has better output voltage adjustment performance and load capacity than the above two circuits.

[0141] Figure 7 A schematic diagram of another voltage doubling circuit according to an embodiment of the present disclosure is schematically shown.

[0142] like Figure 7 As shown, another voltage doubling circuit in the embodiment of the present disclosure may include a power supply module, a transformer module, a rectifier module, a voltage doubling module and a load R L , the output voltage can be expressed as V o3 The power supply module may include a first AC voltage source Va , the second AC voltage source V b , the third AC voltage source V c The transformer module may include a first transformer T1, a second transformer T2 and a third transformer T3, wherein the first AC voltage source V a , the second AC voltage source V b and the third AC voltage source V c The first stage voltage doubling unit may include a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth diode D5, a sixth diode D6, and a first capacitor C1. The first stage voltage doubling unit may include a second capacitor C2, a third capacitor C3, and a fourth diode D4. The first stage voltage doubling unit may include a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, and a first capacitor C1. The first stage voltage doubling unit may include a second capacitor C2, a third capacitor C3, and a fourth diode D4. A_1 , the fourth capacitor C B_1 , the fifth capacitor C C_1 , and may include a seventh diode D A_1 , the eighth diode D A_2 、Ninth diode D B_1 , the tenth diode D B_2 11th diode D C_1 , the twelfth diode D C_2 The n-th voltage multiplication unit may include a second capacitor C n , the third capacitor C A_n-1 , the fourth capacitor C B_n-1 , the fifth capacitor C C_n-1 , and may include a seventh diode D A_2n-3 , the eighth diode D A_2n-2 、Ninth diode D B_2n-3 , the tenth diode D B_2n-2 11th diode D C_2n-3 , the twelfth diode D C_2n-2 The voltage doubling module may be composed of n-1 levels of voltage doubling units.

[0143] The primary winding of the three-phase transformer unit of the voltage doubling circuit is configured to be connected in a star manner, and the secondary winding of the three-phase transformer unit is also configured to be connected in a star manner.

[0144] It should be noted that the dotted boxes in the drawings of the embodiments of the present disclosure are for illustrative purposes only and do not specifically limit the actual structure.

[0145] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations and / or combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways without departing from the spirit and teachings of the present disclosure. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0146] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A voltage doubling circuit, comprising: A transformer module, wherein the primary side of the transformer module is configured to be connected to the power module, and the transformer module is configured to obtain a first voltage based on a voltage transformation process on an AC input voltage provided by the power module; a rectifier module, the rectifier module being configured to be connected to the secondary side of the transformer module, the rectifier module being configured to rectify the first voltage to obtain a second voltage, and provide the second voltage to a load through a voltage doubling module; as well as The voltage doubling module is configured to be connected to the secondary side of the transformer module, and is configured to double the first voltage to obtain a third voltage, and provide the third voltage to the load.

2. The voltage doubling circuit according to claim 1, wherein: The transformer module includes a three-phase transformer unit, and the three-phase transformer unit includes a first transformer, a second transformer and a third transformer.

3. The voltage doubling circuit according to claim 2, wherein: The primary winding of the three-phase transformer unit is configured to be connected in a delta manner, and the secondary winding of the three-phase transformer unit is configured to be connected in a star manner; The first end of the primary side of the first transformer, the first end of the primary side of the second transformer and the first end of the primary side of the third transformer are respectively configured to be connected to the power module, the first end of the primary side of the first transformer is configured to be connected to the second end of the primary side of the third transformer, the second end of the primary side of the first transformer is configured to be connected to the first end of the primary side of the second transformer, and the second end of the primary side of the second transformer is configured to be connected to the first end of the primary side of the third transformer; The first end of the secondary side of the first transformer, the first end of the secondary side of the second transformer, and the first end of the secondary side of the third transformer are respectively configured to connect the rectifier module and the voltage doubler module, and the second end of the secondary side of the first transformer, the second end of the secondary side of the second transformer, and the second end of the secondary side of the third transformer are configured to be connected to each other.

4. The voltage doubling circuit according to claim 2, wherein: The primary winding of the three-phase transformer unit is configured to be connected in a star manner, and the secondary winding of the three-phase transformer unit is configured to be connected in a delta manner; The first end of the primary side of the first transformer, the first end of the primary side of the second transformer and the first end of the primary side of the third transformer are respectively configured to be connected to the power module, and the second end of the primary side of the first transformer, the second end of the primary side of the second transformer and the second end of the primary side of the third transformer are configured to be connected to each other; The first end of the secondary side of the first transformer, the first end of the secondary side of the second transformer and the first end of the secondary side of the third transformer are respectively configured to connect the rectifier module and the voltage doubler module, the first end of the secondary side of the first transformer is configured to connect the second end of the secondary side of the third transformer, the second end of the secondary side of the first transformer is configured to connect the first end of the secondary side of the second transformer, and the second end of the secondary side of the second transformer is configured to connect the first end of the secondary side of the third transformer.

5. The voltage doubling circuit according to claim 3 or 4, wherein: The power supply module includes a three-phase power supply unit, and the three-phase power supply unit includes a first AC voltage source, a second AC voltage source and a third AC voltage source; Among them, the first end of the first AC voltage source, the first end of the second AC voltage source and the first end of the third AC voltage source are configured to be connected to each other, the second end of the first AC voltage source is configured to be connected to the first end of the primary side of the first transformer, the second end of the second AC voltage source is configured to be connected to the first end of the primary side of the second transformer, and the second end of the third AC voltage source is configured to be connected to the first end of the primary side of the third transformer.

6. The voltage doubling circuit according to claim 5, wherein: The phase difference among the output voltage of the first AC voltage source, the output voltage of the second AC voltage source, and the output voltage of the third AC voltage source is configured to be 120°.

7. The voltage doubling circuit according to claim 3 or 4, wherein: The rectifier module includes a first bridge arm, a second bridge arm, a third bridge arm and a first capacitor; Among them, the first end of the first bridge arm, the first end of the second bridge arm and the first end of the third bridge arm are configured to be connected to each other and connected to the first end of the first capacitor, the second end of the first bridge arm, the second end of the second bridge arm and the second end of the third bridge arm are configured to be connected to each other and connected to the second end of the first capacitor, the midpoint of the first bridge arm is configured to be connected to the first end of the secondary side of the first transformer, the midpoint of the second bridge arm is configured to be connected to the first end of the secondary side of the second transformer, the midpoint of the third bridge arm is configured to be connected to the first end of the secondary side of the third transformer, the first end of the first capacitor is configured to be grounded, and the second end of the first capacitor is configured to be connected to the rectifier module.

8. The voltage doubling circuit according to claim 7, wherein: The first bridge arm includes a first diode and a second diode, the anode of the first diode is configured to be connected to the first end of the first bridge arm, the cathode of the first diode is configured to be connected to the midpoint of the first bridge arm and the anode of the second diode respectively, and the cathode of the second diode is configured to be connected to the second end of the first bridge arm; The second bridge arm comprises a third diode and a fourth diode, the anode of the third diode is configured to be connected to the first end of the second bridge arm, the cathode of the third diode is configured to be connected to the midpoint of the second bridge arm and the anode of the fourth diode respectively, and the cathode of the fourth diode is configured to be connected to the second end of the second bridge arm; as well as The third bridge arm includes a fifth diode and a sixth diode, the anode of the fifth diode is configured to be connected to the first end of the third bridge arm, the cathode of the fifth diode is configured to be connected to the midpoint of the third bridge arm and the anode of the sixth diode respectively, and the cathode of the sixth diode is configured to be connected to the second end of the third bridge arm.

9. The voltage doubling circuit according to claim 3 or 4, wherein: The voltage doubling module includes n voltage doubling units, wherein n is a positive integer greater than 1; wherein the first end of the i-th voltage doubling unit is configured to be connected to the fifth end of the i-1-th voltage doubling unit, the second end of the i-th voltage doubling unit is configured to be connected to the sixth end of the i-1-th voltage doubling unit, the third end of the i-th voltage doubling unit is configured to be connected to the seventh end of the i-1-th voltage doubling unit, and the fourth end of the i-th voltage doubling unit is configured to be connected to the eighth end of the i-1-th voltage doubling unit, wherein i is a positive integer less than or equal to n; The first end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the first transformer, the second end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the second transformer, the third end of the first voltage doubler unit is configured to be connected to the first end of the secondary side of the third transformer, and the fourth end of the first voltage doubler unit is configured to be connected to the rectifier unit; and The eighth terminal of the nth voltage doubling unit is configured to be connected to the positive electrode of the load.

10. The voltage doubling circuit according to claim 9, wherein: The voltage doubling unit includes a fourth bridge arm, a fifth bridge arm, a sixth bridge arm, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor; Among them, the first end of the fourth bridge arm, the first end of the fifth bridge arm and the first end of the sixth bridge arm are configured to be connected to each other, and are respectively connected to the fourth end of the voltage doubling unit and the first end of the second capacitor, the second end of the fourth bridge arm, the second end of the fifth bridge arm and the second end of the sixth bridge arm are configured to be connected to each other, and are respectively connected to the eighth end of the voltage doubling unit and the second end of the second capacitor, the midpoint of the fourth bridge arm is configured to be respectively connected to the second end of the third capacitor and the fifth end of the voltage doubling unit, the midpoint of the fifth bridge arm is configured to be respectively connected to the second end of the fourth capacitor and the sixth end of the voltage doubling unit, the midpoint of the sixth bridge arm is configured to be respectively connected to the second end of the fifth capacitor and the seventh end of the voltage doubling unit, the first end of the third capacitor is configured to be connected to the first end of the voltage doubling unit, the first end of the fourth capacitor is configured to be connected to the second end of the voltage doubling unit, and the first end of the fifth capacitor is configured to be connected to the third end of the voltage doubling unit.

11. The voltage doubling circuit according to claim 10, wherein: The fourth bridge arm includes a seventh diode and an eighth diode, the anode of the seventh diode is configured to be connected to the first end of the fourth bridge arm, the cathode of the seventh diode is configured to be connected to the midpoint of the fourth bridge arm and the anode of the eighth diode respectively, and the cathode of the eighth diode is configured to be connected to the second end of the fourth bridge arm; The fifth bridge arm comprises a ninth diode and a tenth diode, the anode of the ninth diode is configured to be connected to the first end of the fifth bridge arm, the cathode of the ninth diode is configured to be connected to the midpoint of the fifth bridge arm and the anode of the tenth diode respectively, and the cathode of the tenth diode is configured to be connected to the second end of the fifth bridge arm; as well as The sixth bridge arm includes an eleventh diode and a twelfth diode, the anode of the eleventh diode is configured to be connected to the first end of the sixth bridge arm, the cathode of the eleventh diode is configured to be connected to the midpoint of the sixth bridge arm and the anode of the twelfth diode respectively, and the cathode of the twelfth diode is configured to be connected to the second end of the sixth bridge arm.

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