Switching power supply with single-stage high wide input voltage

An input voltage, input circuit technology, applied in the output power conversion device, DC power input conversion to DC power output, electrical components and other directions, can solve the problems of low voltage, large conduction loss, large duty cycle, etc. The effect of stable output DC voltage, simplified design and optimized design

Inactive Publication Date: 2013-08-21
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The voltage is too low, the duty cycle is too large, and the conduction loss is greater

Method used

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  • Switching power supply with single-stage high wide input voltage
  • Switching power supply with single-stage high wide input voltage

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Embodiment Construction

[0038] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0039] Such as figure 1 As shown, this embodiment includes: input circuit 1, frequency conversion circuit 2, core circuit 3, flyback circuit 4, output circuit 5, feedback circuit 6 and auxiliary circuit 7, wherein: input circuit 1, frequency conversion circuit 2, core circuit 3 , the flyback circuit 4, and the output circuit 5 are cascaded accordingly, the feedback circuit 6 is connected to the output circuit 5, and the auxiliary circuit 7 is connected to the flyback circuit.

[0040] Such as figure 2 As shown, the flyback circuit 4 includes: a transformer T1, an absorption circuit 8 and a chopper circuit 9, wh...

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Abstract

The invention relates to a switching power supply with single-stage high wide input voltage in the technical field of the switching power supplies, which comprises an input circuit, an auxiliary circuit, a frequency conversion circuit, a core circuit, a flyback circuit, a feedback circuit and an output circuit, wherein the input circuit, the frequency conversion circuit, the core circuit, the flyback circuit and the output circuit are in cascade connection sequentially, the feedback circuit is connected with the output circuit, and the auxiliary circuit is connected with the flyback circuit. The switching power supply can realize high voltage direct current-low voltage direct current conversion, is applicable to the high wide input voltage, and simultaneously has the advantages of simple structure and easiness in control.

Description

technical field [0001] The invention relates to a device in the technical field of switching power supplies, in particular to a switching power supply with a single-stage high-width input voltage. Background technique [0002] High-voltage frequency conversion speed regulation, power meter detection, submarine cables and other application fields have high voltage levels and wide variation ranges, so the design ideas of switching power supplies used in these fields must be changed accordingly. For the general switching power supply design, its adaptable input voltage range is small, which cannot meet these special industrial applications. The input voltage range of power system testing instrument power supply is AC 90-600V, the input voltage range of submarine cable power supply is AC 1500-2000V, and the input voltage range of industrial inverter power supply is AC 140-800V. Because these fields are relatively special, there are relatively few researches and designs on switc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
Inventor 杨喜军曹中圣蒋婷王虎
Owner SHANGHAI JIAOTONG UNIV
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