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High-voltage flyback switching power supply applied to different input voltage levels

A switching power supply, input voltage technology, applied in the direction of high-efficiency power electronic conversion, output power conversion device, DC power input conversion to DC power output, etc., to improve conversion efficiency, reduce volume, reduce switching loss and device temperature rise Effect

Active Publication Date: 2020-11-20
XIAN ACTIONPOWER ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the existing problems and design requirements of the existing flyback switching power supply, and provide a high-voltage flyback switching power supply applicable to different input voltage levels and voltage ranges

Method used

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  • High-voltage flyback switching power supply applied to different input voltage levels
  • High-voltage flyback switching power supply applied to different input voltage levels
  • High-voltage flyback switching power supply applied to different input voltage levels

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific embodiment content of the present invention is described in further detail:

[0035] Such as figure 1 The shown topological structure diagram of the present invention applied to high-voltage flyback switching power supply of different input voltage levels, including anti-shock and EMI circuit 1, two-stage double-tube double-winding flyback switching power supply, sampling circuit 6, control chip 4, drive Circuit 5 and feedback circuit 3. in. The two-stage double-tube double-winding flyback switching power supply is recorded as the first-stage double-tube double-winding flyback switching power supply and the second-stage double-tube double-winding flyback switching power supply. The topological structures of the switching power supplies are the same, including a voltage equalizing circuit, a high-frequency transformer and two RCD absorbing circuits 7 .

[0036] A high frequency transformer includes a primary ...

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Abstract

The invention provides a high-voltage flyback switching power supply applied to different input voltage levels, and solves problems and design requirements of an existing flyback switching power supply. In the invention, a thought of series connection of two-stage double-tube double-winding flyback switching power supplies is adopted, correct voltage output is realized, and a flyback switching power supply topological structure suitable for different input voltage levels is established through cooperation of a change-over switch and a short-circuit switch; and by selecting a proper switching working mode, a size of a high-frequency transformer is effectively reduced, the switching loss of a MOSFET is reduced, and the working efficiency of the switching power supply is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of switching power supplies, and in particular relates to a high-voltage flyback switching power supply applied to different input voltage levels. Background technique [0002] The existing flyback switching power supply includes a single-tube flyback switching power supply, a double-tube single-winding flyback switching power supply, and a double-tube double-winding flyback switching power supply. [0003] For a single-tube flyback switching power supply, its structure is in the form of a single-stage MOSFET and a single-input winding in series. At this time, the voltage stress that the MOSFET needs to withstand during the turn-off period is relatively large, including the input voltage and the voltage reflected back to the primary side by the secondary side. , and the voltage spike generated by the oscillation between the transformer leakage inductance and the MOSFET junction capacitance. Since the maximu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/08H02M1/44
CPCH02M3/33569H02M1/08H02M1/44H02M1/0048Y02B70/10
Inventor 赵晓妮白小青李海波
Owner XIAN ACTIONPOWER ELECTRIC
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