Zero-voltage power switch

Abstract

The utility model belongs to the technical field of zero-voltage switches, and particularly relates to a zero-voltage power switch, which comprises a secondary circuit, a primary circuit and a power supply. The main stage circuit comprises a first output voltage multiplier, a second output voltage multiplier, a third output voltage multiplier, a fourth output voltage multiplier, a second diode, a third diode, a fourth diode, a fifth diode, a first shunt capacitor, a second shunt capacitor, a third shunt capacitor, a fourth shunt capacitor, a fourth capacitor, a fifth capacitor and a second inductor. The main-stage circuit supplies power to a load, through resonance of the second inductor, the fourth capacitor and the fifth capacitor, the current of the second inductor is increased reversely, the voltage of the fourth capacitor reaches zero, the sixth diode is switched on, and the voltages at the two ends of the second inductor are clamped at zero. And the first inductive current is conducted through the fourth output voltage multiplier and the sixth diode, so that the current value is almost constant, and the loss of loop current in the circuit is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of zero voltage switches, and in particular relates to a zero voltage power switch. Background Art

[0002] Zero voltage power switching is mainly used to reduce the voltage and current changes during the switching process, thereby reducing switching losses and improving power efficiency. The working principle of zero voltage power switching is to reduce the voltage in the power circuit to zero at the moment the power switch is closed or opened, so as to control the current change without using additional capacitors or inductors.

[0003] However, the existing zero voltage power switch still has some problems, such as large loss of loop current in the circuit. Therefore, how to solve the large loss of loop current in the existing zero voltage power switch is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The utility model aims to provide a zero voltage power switch to solve the technical problem of large loss of loop current of the existing zero voltage power switch.

[0005] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0006] A zero voltage power switch, comprising a secondary circuit, a primary circuit and a power supply, wherein the primary circuit comprises a first output voltage multiplier, a second output voltage multiplier, a third output voltage multiplier, a fourth output voltage multiplier, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, a first parallel capacitor, a second parallel capacitor, a third parallel capacitor, a fourth parallel capacitor, a fourth capacitor, a fifth capacitor and a second inductor;

[0007] The first output voltage multiplier is connected in series with the second output voltage multiplier, and the series connection is respectively connected to the positive electrode and the negative electrode of the power supply, and the third output voltage multiplier is connected in series with the fourth output voltage multiplier, and the series connection is respectively connected to the positive electrode and the negative electrode of the power supply;

[0008] The second diode is connected in parallel to both ends of the second output voltage multiplier, and is connected in parallel to the second parallel capacitor; the third diode is connected in parallel to both ends of the first output voltage multiplier, and is connected in parallel to the first parallel capacitor; the fourth diode is connected in parallel to both ends of the fourth output voltage multiplier, and is connected in parallel to the fourth parallel capacitor; the fifth diode is connected in parallel to both ends of the third output voltage multiplier, and is connected in parallel to the third parallel capacitor;

[0009] One end of the second power transformer is respectively connected to the third output voltage multiplier and the fourth output voltage multiplier, and one end of the first power transformer is respectively connected to the first output voltage multiplier and the second output voltage multiplier;

[0010] One end of the second inductor is respectively connected to the third output voltage multiplier and the fourth output voltage multiplier, and one end is respectively connected to the fourth capacitor and the fifth capacitor, the other end of the fourth capacitor is connected to the fourth output voltage multiplier, and the other end of the fifth capacitor is connected to the third output voltage multiplier;

[0011] The sixth diode and the seventh diode are connected in parallel to both ends of the fourth capacitor and the seventh capacitor respectively.

[0012] Preferably, the secondary circuit includes a first power transformer, a second power transformer, a first capacitor, a second capacitor, a third capacitor and a first diode, a first inductor and a resistor. The first power transformer and the second power transformer are connected in series, one end of the first power transformer is respectively connected to the first capacitor, the second capacitor and the resistor, one end of the second power transformer is respectively connected to the positive electrode of the first diode, the negative electrode of the first diode is respectively connected to the third capacitor, the first capacitor and the resistor, and the first capacitor is connected in parallel with the resistor.

[0013] The beneficial effects of the utility model include:

[0014] The utility model provides a zero voltage power supply circuit, which supplies power to a load through a main circuit, and through the resonance of a second inductor, a fourth capacitor and a fifth capacitor, the current of the second inductor is reversely increased, the voltage of the fourth capacitor reaches zero, the sixth diode is turned on, and the voltage across the second inductor is clamped at zero, so that the current of the first inductor is continued to flow through the fourth output voltage multiplier and the sixth diode is turned on, so that the current value is almost constant, and the loss of the loop current in the circuit is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the circuit structure of the zero voltage power switch of the utility model.

[0016] Reference numerals: V1 first output voltage multiplier, V2 second output voltage multiplier, V3 third output voltage multiplier, V4 fourth output voltage multiplier, D1 first diode, D2 second diode, D3 third diode, D4 ​​fourth diode, D5 fifth diode, D6 sixth diode, D7 seventh diode, C s1 The first parallel capacitor, C s2 The second parallel capacitor, C s3 The third parallel capacitor, C s4The fourth parallel capacitor, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the first inductor L1, the second inductor L2, the U power supply, the first power transformer T1, and the second power transformer T2. DETAILED DESCRIPTION

[0017] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0018] It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. It should be understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0019] The following is combined with Figure 1 The utility model is further described in detail:

[0020] See attached Figure 1 As shown, a zero voltage power supply U switch includes a secondary circuit, a primary circuit and a power supply U, wherein the primary circuit includes a first output voltage multiplier V 1、A second output voltage multiplier V2, a third output voltage multiplier V3, a fourth output voltage multiplier V4, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, a first parallel capacitor Cs1, a second parallel capacitor Cs2, a third parallel capacitor Cs3, a fourth parallel capacitor Cs4, a fourth capacitor C4, a fifth capacitor C5 and a second inductor L2;

[0021] The first output voltage multiplier V1 and the second output voltage multiplier V2 are connected in series, and are respectively connected to the positive electrode and the negative electrode of the power supply U after the series connection; the third output voltage multiplier V3 and the fourth output voltage multiplier V4 are connected in series, and are respectively connected to the positive electrode and the negative electrode of the power supply U after the series connection;

[0022] The second diode D2 is connected in parallel to both ends of the second output voltage multiplier V2, and is connected in parallel to the second parallel capacitor Cs2; the third diode D3 is connected in parallel to both ends of the first output voltage multiplier V1, and is connected in parallel to the first parallel capacitor Cs1; the fourth diode D4 is connected in parallel to both ends of the fourth output voltage multiplier V4, and is connected in parallel to the fourth parallel capacitor Cs4; the fifth diode D5 is connected in parallel to both ends of the third output voltage multiplier V3, and is connected in parallel to the third parallel capacitor Cs3;

[0023] One end of the second power transformer T2 is respectively connected to the third output voltage multiplier V3 and the fourth output voltage multiplier V4, and one end of the first power transformer T1 is respectively connected to the first output voltage multiplier V1 and the second output voltage multiplier V2;

[0024] One end of the second inductor L2 is respectively connected to the third output voltage multiplier V3 and the fourth output voltage multiplier V4, and one end is respectively connected to the fourth capacitor C4 and the fifth capacitor C5, the other end of the fourth capacitor C4 is connected to the fourth output voltage multiplier V4, and the other end of the fifth capacitor C5 is connected to the third output voltage multiplier V3;

[0025] The sixth diode D6 and the seventh diode D7 are connected in parallel to both ends of the fourth capacitor C4 and the seventh capacitor respectively.

[0026] The main circuit supplies power to the load, and through the resonance of the second inductor L2, the fourth capacitor C4 and the fifth capacitor C5, the current of the second inductor L2 increases in the reverse direction, the voltage of the fourth capacitor C4 reaches zero, the sixth diode D6 is turned on, and the voltage across the second inductor L2 is clamped at zero, so that the current of the first inductor L1 is turned on through the fourth output voltage multiplier V4 and the sixth diode D6 to continue to flow, so that the current value is almost constant, effectively reducing the loss of loop current in the circuit.

[0027] The secondary circuit includes a first power transformer T1, a second power transformer T2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode D1, a first inductor L1 and a resistor. The first power transformer T1 and the second power transformer T2 are connected in series, one end of the first power transformer T1 is respectively connected to the first capacitor C1, the second capacitor C2 and the resistor, one end of the second power transformer T2 is respectively connected to the positive electrode of the first diode D1, the negative electrode of the first diode D1 is respectively connected to the third capacitor C3, the first capacitor C1 and the resistor, and the first capacitor C1 is connected in parallel with the resistor.

[0028] The secondary circuit is connected in parallel with the primary circuit. When the load of the circuit increases from a small value, the voltage acting on the first inductor L1 will also increase, causing the current to decrease rapidly during the circulation through the first output voltage multiplier V1 and the third output voltage multiplier V3. Before the third output voltage multiplier V3 is turned off, the current effectively reaches zero and increases in the reverse direction. The anti-parallel fifth diode D5 of the third output voltage multiplier V3 is used for continuous flow, so that the third output voltage multiplier V3 is turned off with zero current, thereby effectively reducing the loss of loop current.

[0029] In summary, the load is powered by the primary circuit, and the current of the second inductor L2 increases in the reverse direction through the resonance of the second inductor L2, the fourth capacitor C4 and the fifth capacitor C5, the voltage of the fourth capacitor C4 reaches zero, the sixth diode D6 is turned on, and the voltage across the second inductor L2 is clamped at zero, so that the current of the first inductor L1 continues to flow through the fourth output voltage multiplier V4 and the sixth diode D6, so that the current value is almost constant, effectively reducing the loss of the loop current in the circuit. The secondary circuit is designed, when the load of the circuit increases from small to large, the voltage acting on the first inductor L1 will also increase, so that the current decreases rapidly during the circulation through the first output voltage multiplier V1 and the third output voltage multiplier V3, and the current reaches zero and increases in the reverse direction before the third output voltage multiplier V3 is turned off, and the third output voltage multiplier V3 is turned on by the anti-parallel fifth diode D5 of the third output voltage multiplier V3, so that the third output voltage multiplier V3 is turned off with zero current, effectively reducing the loss of the loop current.

[0030] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A zero voltage power switch, characterized in that: The invention comprises a secondary circuit, a primary circuit and a power supply, wherein the primary circuit comprises a first output voltage multiplier, a second output voltage multiplier, a third output voltage multiplier, a fourth output voltage multiplier, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, a first parallel capacitor, a second parallel capacitor, a third parallel capacitor, a fourth parallel capacitor, a fourth capacitor, a fifth capacitor, a first power transformer, a second power transformer and a second inductor; The first output voltage multiplier is connected in series with the second output voltage multiplier, and the series connection is respectively connected to the positive electrode and the negative electrode of the power supply, and the third output voltage multiplier is connected in series with the fourth output voltage multiplier, and the series connection is respectively connected to the positive electrode and the negative electrode of the power supply; The second diode is connected in parallel to both ends of the second output voltage multiplier, and is connected in parallel to the second parallel capacitor; the third diode is connected in parallel to both ends of the first output voltage multiplier, and is connected in parallel to the first parallel capacitor; the fourth diode is connected in parallel to both ends of the fourth output voltage multiplier, and is connected in parallel to the fourth parallel capacitor; the fifth diode is connected in parallel to both ends of the third output voltage multiplier, and is connected in parallel to the third parallel capacitor; One end of the second power transformer is respectively connected to the third output voltage multiplier and the fourth output voltage multiplier, and one end of the first power transformer is respectively connected to the first output voltage multiplier and the second output voltage multiplier; One end of the second inductor is respectively connected to the third output voltage multiplier and the fourth output voltage multiplier, and one end is respectively connected to the fourth capacitor and the fifth capacitor, the other end of the fourth capacitor is connected to the fourth output voltage multiplier, and the other end of the fifth capacitor is connected to the third output voltage multiplier; The sixth diode and the seventh diode are connected in parallel to both ends of the fourth capacitor and the seventh capacitor respectively.

2. A zero voltage power switch according to claim 1, characterized in that: The secondary circuit includes a first power transformer, a second power transformer, a first capacitor, a second capacitor, a third capacitor and a first diode, a first inductor and a resistor. The first power transformer and the second power transformer are connected in series, one end of the first power transformer is respectively connected to the first capacitor, the second capacitor and the resistor, one end of the second power transformer is respectively connected to the positive electrode of the first diode, the negative electrode of the first diode is respectively connected to the third capacitor, the first capacitor and the resistor, and the first capacitor is connected in parallel with the resistor.

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