High-power power supply circuit

Abstract

The utility model discloses a high-power power supply circuit, which comprises an anti-surge module, a primary anti-interference module, a secondary anti-interference module and a rectifier module, the anti-surge module is electrically connected with external mains supply, an input end of the primary anti-interference module is electrically connected with the anti-surge module, and an output end of the secondary anti-interference module is electrically connected with the rectifier module. The output end of the first-stage anti-interference module is electrically connected with the input end of the second-stage anti-interference module, and the input end of the rectification module is electrically connected with the output end of the second-stage anti-interference module. Commercial power sequentially passes through the first-stage anti-interference module and the second-stage anti-interference module after passing through the anti-surge module, is rectified by the rectifier module and then flows to a post-stage circuit, and due to the existence of the anti-surge module, the first-stage anti-interference module and the second-stage anti-interference module, the anti-interference effect of the input end of the power supply circuit is obviously enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a high-power power supply circuit. Background Art

[0002] The switching power supply is named because the device that adjusts and stabilizes the voltage in the power supply always works in a switching mode. It uses modern power electronics technology to maintain a stable output voltage by controlling the on-off time ratio of the switch tube. It is widely used in various electronic devices, such as audio, because of its excellent characteristics such as small size, light weight, low power consumption, high efficiency, small ripple, low noise, high intelligence, and easy expansion. The existing high-power switching power supply used in audio has a relatively weak anti-interference ability at the input end. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a high-power power supply circuit with good anti-interference effect at the input end.

[0004] According to the high-power power supply circuit of the embodiment of the utility model, it includes an anti-surge module, which is electrically connected to the external mains; a primary anti-interference module and a secondary anti-interference module, the input end of the primary anti-interference module is electrically connected to the anti-surge module, and the output end of the primary anti-interference module is electrically connected to the input end of the secondary anti-interference module; and a rectifier module, the input end of the rectifier module is electrically connected to the output end of the secondary anti-interference module.

[0005] According to some embodiments of the utility model, the primary anti-interference module includes a capacitor XC1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6, one end of the capacitor XC1 is electrically connected to an input end of the secondary anti-interference module, one end of the resistor R1 and one end of the resistor R4, the other end of the resistor R1 is electrically connected to one end of the resistor R2, the other end of the resistor R4 and one end of the resistor R5, the other end of the resistor R2 is electrically connected to one end of the resistor R3, the other end of the resistor R5 and one end of the resistor R6, and the other end of the resistor R3 is electrically connected to the other end of the resistor R6, the other end of the capacitor XC1 and another input end of the secondary anti-interference module.

[0006] According to some embodiments of the utility model, the secondary anti-interference module includes a power inductor LF1, a power inductor LF2 and a capacitor XC2, one end of the power inductor LF1 is electrically connected to the capacitor CX1, the other end of the power inductor LF1 is electrically connected to the capacitor XC2 and one end of the power inductor LF2 respectively, and the other end of the power inductor LF2 is electrically connected to the rectifier module.

[0007] According to some embodiments of the present invention, the anti-surge module includes an anti-voltage surge unit, and the anti-voltage surge unit includes a varistor MOV1, one end of the varistor MOV1 is electrically connected to the neutral line, and the other end of the varistor MOV1 is electrically connected to the live line.

[0008] According to some embodiments of the utility model, a PFC boost module is further included, wherein the input end of the PFC boost module is electrically connected to the output end of the rectifier module, and the PFC boost module includes a PFC chip U1, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a MOS tube Q1 and a MOS tube Q2. The input end of the PFC chip U1 is electrically connected to the output end of the rectifier module, the output end of the PFC chip U1 is electrically connected to one end of the resistor R7 and one end of the resistor R8 respectively, the other end of the resistor R7 is electrically connected to one end of the resistor R9 and the G pole of the MOS tube respectively, the S pole of the MOS tube is electrically connected to the other end of the resistor R9, one end of the resistor R10 and the S pole of the MOS tube Q2 respectively, the D pole of the MOS tube Q1 is electrically connected to one end of the inductor L1, the other end of the inductor L1 is electrically connected to the output end of the rectifier module, the other end of the resistor R8 is electrically connected to the other end of the resistor R10 and the G pole of the MOS tube Q2 respectively, and the D pole of the MOS tube Q2 is electrically connected to the D pole of the MOS tube Q1.

[0009] According to some embodiments of the present invention, an LLC main control transformer module is further included, the input end of the LLC main control transformer module is electrically connected to the output end of the PFC boost module, and the output end of the LLC main control transformer module outputs three voltages.

[0010] According to some embodiments of the utility model, the LLC main control transformer module includes an LLC chip U2, a MOS tube Q3, a MOS tube Q4, a resonant capacitor C1 and a transformer T1, the D pole of the MOS tube Q3 is electrically connected to the output end of the PFC boost module, the G pole of the MOS tube Q3 is electrically connected to the VGH pin of the LLC chip U2, the S pole of the MOS tube Q3 is electrically connected to the D pole of the MOS tube Q4, the G pole of the MOS tube Q4 is electrically connected to the VGL pin of the LLC chip U2, the S pole of the MOS tube Q4 is electrically connected to one end of the resonant capacitor C1, the other end of the resonant capacitor C1 is electrically connected to the primary side of the transformer T1, and the secondary side of the transformer T1 has multiple output ends.

[0011] According to the high-power power supply circuit of the embodiment of the utility model, at least the following beneficial effects are achieved: after the AC power passes through the anti-surge module, it passes through the primary anti-interference module and the secondary anti-interference module in sequence, and then flows to the subsequent circuit after being rectified by the rectifier module. Due to the presence of the anti-surge module, the primary anti-interference module and the secondary anti-interference module, the anti-interference effect of the input end of the power supply circuit is significantly enhanced.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings;

[0014] Figure 1 It is a block diagram of a high-power power supply circuit;

[0015] Figure 2 It is the circuit schematic diagram of a high-power power supply circuit. DETAILED DESCRIPTION

[0016] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0017] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention.

[0018] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0019] Reference Figure 1 to Figure 2The utility model discloses a high-power power supply circuit, including an anti-surge module, a primary anti-interference module 11, a secondary anti-interference module 12, and a rectifier module 30. The anti-surge module is electrically connected to the external mains power supply, the input end of the primary anti-interference module 11 is electrically connected to the anti-surge module, the output end of the primary anti-interference module 11 is electrically connected to the input end of the secondary anti-interference module 12, and the input end of the rectifier module 30 is electrically connected to the output end of the secondary anti-interference module 12. After passing through the anti-surge module, the mains power passes through the primary anti-interference module 11 and the secondary anti-interference module 12 in sequence, and then flows to the subsequent circuit after being rectified by the rectifier module 30. Due to the presence of the anti-surge module, the primary anti-interference module 11, and the secondary anti-interference module 12, the anti-interference effect of the input end of the power supply circuit is significantly enhanced.

[0020] like Figure 2 The primary anti-interference module 11 includes a capacitor XC1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6. One end of the capacitor XC1 is electrically connected to an input end of the secondary anti-interference module 12, one end of the resistor R1 and one end of the resistor R4, respectively. The other end of the resistor R1 is electrically connected to one end of the resistor R2, the other end of the resistor R4 and one end of the resistor R5, respectively. The other end of the resistor R2 is electrically connected to one end of the resistor R3, the other end of the resistor R5 and one end of the resistor R6, respectively. The other end of the resistor R3 is electrically connected to the other end of the resistor R6, the other end of the capacitor XC1 and another input end of the secondary anti-interference module 12; multiple resistors are bridge-connected to perform differential mode anti-interference work, and the capacitor XC1 has a discharge effect. The secondary anti-interference module 12 includes a power inductor LF1, a power inductor LF2 and a capacitor XC2. One end of the power inductor LF1 is electrically connected to the capacitor CX1, and the other end of the power inductor LF1 is electrically connected to the capacitor XC2 and one end of the power inductor LF2 respectively. The other end of the power inductor LF2 is electrically connected to the rectifier module 30, further playing a differential mode anti-interference role.

[0021] The anti-surge module includes an anti-voltage surge unit, which includes a varistor MOV1. One end of the varistor MOV1 is electrically connected to the neutral line, and the other end of the varistor MOV1 is electrically connected to the live line, so as to absorb voltage surges.

[0022] In some embodiments, a PFC boost module 40 is also included, and the input end of the PFC boost module 40 is electrically connected to the output end of the rectifier module 30. The PFC boost module 40 includes a PFC chip U1, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a MOS tube Q1 and a MOS tube Q2. The input end of the PFC chip U1 is electrically connected to the output end of the rectifier module 30, and the output end of the PFC chip U1 is respectively electrically connected to one end of the resistor R7 and one end of the resistor R8, and the other end of the resistor R7 is respectively electrically connected to one end of the resistor R9, the MOS tube Q1 and the MOS tube Q2. The G pole of the OS tube is electrically connected, the S pole of the MOS tube is electrically connected to the other end of the resistor R9, one end of the resistor R10 and the S pole of the MOS tube Q2 respectively, the D pole of the MOS tube Q1 is electrically connected to one end of the inductor L1, the other end of the inductor L1 is electrically connected to the output end of the rectifier module 30, the other end of the resistor R8 is electrically connected to the other end of the resistor R10 and the G pole of the MOS tube Q2 respectively, the D pole of the MOS tube Q2 is electrically connected to the D pole of the MOS tube Q1, and the PFC boost module 40 boosts the 310V output by the rectifier module 30 to 400V.

[0023] In some embodiments, an LLC main control transformer module 50 is further included. The input end of the LLC main control transformer module 50 is electrically connected to the output end of the PFC boost module 40 at a voltage of 400V. The output end of the LLC main control transformer module 50 outputs three voltages of A, B, and C. The LLC main control transformer module 50 includes an LLC chip U2, a MOS transistor Q3, a MOS transistor Q4, a resonant capacitor C1, and a transformer T1. The D pole of the MOS transistor Q3 is electrically connected to the output end of the PFC boost module 40, the G pole of the MOS transistor Q3 is electrically connected to the VGH pin of the LLC chip U2, the S pole of the MOS transistor Q3 is electrically connected to the D pole of the MOS transistor Q4, the G pole of the MOS transistor Q4 is electrically connected to the VGL pin of the LLC chip U2, the S pole of the MOS transistor Q4 is electrically connected to one end of the resonant capacitor C1, and the other end of the resonant capacitor C1 is electrically connected to the primary side of the transformer T1. The secondary side of the transformer T1 has three output ends A, B, and C to output voltages of different magnitudes respectively to power the subsequent circuit.

[0024] It is easy for those skilled in the art to understand that the above preferred embodiments can be freely combined and superimposed without conflict.

[0025] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

[0026] The utility model discloses a high-power power supply circuit, including an anti-surge module, a primary anti-interference module, a secondary anti-interference module, and a rectifier module. The anti-surge module is electrically connected to an external mains power supply, the input end of the primary anti-interference module is electrically connected to the anti-surge module, the output end of the primary anti-interference module is electrically connected to the input end of the secondary anti-interference module, and the input end of the rectifier module is electrically connected to the output end of the secondary anti-interference module. After passing through the anti-surge module, the mains power passes through the primary anti-interference module and the secondary anti-interference module in sequence, and then flows to the subsequent circuit after being rectified by the rectifier module. Due to the presence of the anti-surge module, the primary anti-interference module and the secondary anti-interference module, the anti-interference effect of the input end of the power supply circuit is significantly enhanced.

Claims

1. A high-power power supply circuit, characterized in that: include: The surge protection module is electrically connected to the external mains; A primary anti-interference module (11) and a secondary anti-interference module (12), wherein the input end of the primary anti-interference module (11) is electrically connected to the anti-surge module, and the output end of the primary anti-interference module (11) is electrically connected to the input end of the secondary anti-interference module (12); A rectifier module (30), wherein an input end of the rectifier module (30) is electrically connected to an output end of the secondary anti-interference module (12).

2. The high-power power supply circuit according to claim 1, characterized in that: The primary anti-interference module (11) comprises a capacitor XC1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6; one end of the capacitor XC1 is electrically connected to an input end of the secondary anti-interference module (12), one end of the resistor R1 and one end of the resistor R4, respectively; the other end of the resistor R1 is electrically connected to one end of the resistor R2, the other end of the resistor R4 and one end of the resistor R5, respectively; the other end of the resistor R2 is electrically connected to one end of the resistor R3, the other end of the resistor R5 and one end of the resistor R6, respectively; the other end of the resistor R3 is electrically connected to the other end of the resistor R6, the other end of the capacitor XC1 and another input end of the secondary anti-interference module (12).

3. The high-power power supply circuit according to claim 2, characterized in that: The secondary anti-interference module (12) comprises a power inductor LF1, a power inductor LF2 and a capacitor XC2, one end of the power inductor LF1 is electrically connected to the capacitor CX1, the other end of the power inductor LF1 is electrically connected to the capacitor XC2 and one end of the power inductor LF2 respectively, and the other end of the power inductor LF2 is electrically connected to the rectifier module (30).

4. The high-power power supply circuit according to claim 1, characterized in that: The anti-surge module includes an anti-voltage surge unit, and the anti-voltage surge unit includes a varistor MOV1, one end of the varistor MOV1 is electrically connected to the neutral line, and the other end of the varistor MOV1 is electrically connected to the live line.

5. The high-power power supply circuit according to claim 1, characterized in that: The invention also comprises a PFC boost module (40), wherein the input end of the PFC boost module (40) is electrically connected to the output end of the rectifier module (30), and the PFC boost module (40) comprises a PFC chip U1, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a MOS tube Q1 and a MOS tube Q2, wherein the input end of the PFC chip U1 is electrically connected to the output end of the rectifier module (30), and the output end of the PFC chip U1 is electrically connected to one end of the resistor R7 and one end of the resistor R8 respectively, and the resistors R10, R11 and R12 are electrically connected to each other. The other end of R7 is electrically connected to one end of the resistor R9 and the G pole of the MOS tube respectively; the S pole of the MOS tube is electrically connected to the other end of the resistor R9, one end of the resistor R10 and the S pole of the MOS tube Q2 respectively; the D pole of the MOS tube Q1 is electrically connected to one end of the inductor L1; the other end of the inductor L1 is electrically connected to the output end of the rectifier module (30); the other end of the resistor R8 is electrically connected to the other end of the resistor R10 and the G pole of the MOS tube Q2 respectively; the D pole of the MOS tube Q2 is electrically connected to the D pole of the MOS tube Q1.

6. The high-power power supply circuit according to claim 5, characterized in that: It also comprises an LLC main control transformer module (50), the input end of the LLC main control transformer module (50) is electrically connected to the output end of the PFC boost module (40), and the output end of the LLC main control transformer module (50) outputs three voltages.

7. The high-power power supply circuit according to claim 6, characterized in that: The LLC main control transformer module (50) comprises an LLC chip U2, a MOS transistor Q3, a MOS transistor Q4, a resonant capacitor C1 and a transformer T1, wherein the D pole of the MOS transistor Q3 is electrically connected to the output end of the PFC boost module (40), the G pole of the MOS transistor Q3 is electrically connected to the VGH pin of the LLC chip U2, the S pole of the MOS transistor Q3 is electrically connected to the D pole of the MOS transistor Q4, the G pole of the MOS transistor Q4 is electrically connected to the VGL pin of the LLC chip U2, the S pole of the MOS transistor Q4 is electrically connected to one end of the resonant capacitor C1, the other end of the resonant capacitor C1 is electrically connected to the primary side of the transformer T1, and the secondary side of the transformer T1 has multiple output ends.

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