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Power supply circuit and application thereof

A technology of power supply circuit and AC power supply, applied in the field of power supply, can solve the problems of increasing the cost and complexity of DC power supply, and achieve the effects of omitting power factor correction steps, simplifying design and production costs, and eliminating high-order harmonics.

Inactive Publication Date: 2022-05-27
张逸兴
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But power factor correction is a very complicated thing, it will greatly increase the cost of DC power supply, especially for large power factor correction

Method used

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  • Power supply circuit and application thereof
  • Power supply circuit and application thereof
  • Power supply circuit and application thereof

Examples

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Embodiment Construction

[0029] A 9-phase bridge rectifier circuit for generating 9-phase AC power from the secondary winding of a 3-phase transformer is given below as an example, and a specific implementation is discussed.

[0030] The block diagram of the 9-phase bridge rectifier circuit is as follows figure 1 shown, where n = 9.

[0031] Among them, there are 5 kinds of turns of all secondary windings of the three-phase AC transformer, and the turns ratio between them is: N1:N2:N3:N4:N5= Sin90 o :Sin50 o :Sin10 o : Sin30 o :Sin70 o .

[0032] These 5 turns plus positive and negative polarities, in groups of three, are connected in series to form all the required combinations of 9 transformer secondary windings, which are:

[0033] Transformer secondary winding combination 1: A-phase N1 turns, B-phase-N4 turns, C-phase-N4 turns;

[0034] Transformer secondary winding combination 2: A-phase N2 turns, B-phase N3 turns, C-phase-N5 turns;

[0035] Transformer secondary winding combination 3: A...

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PUM

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Abstract

The invention discloses a power supply circuit and application thereof, which utilizes the electromagnetic induction relationship between conductive winding coils on a magnetic conductive iron core to generate a multi-phase alternating current power supply from a given alternating current power supply, and the multi-phase alternating current power supply passes through a multi-phase bridge rectifier circuit and is directly used as a direct current voltage source with a very small ripple factor without capacitor filtering. Direct-current voltage and current are output, so that higher harmonics caused by capacitor filtering are fundamentally eliminated; and meanwhile, the current input from the power grid by the multi-phase bridge rectifier circuit is sine wave or step wave very close to the sine wave, so that higher harmonics generated at the alternating current side can be reduced to the minimum without power factor correction.

Description

technical field [0001] The present invention relates to the technical field of power supply, in particular to a power supply circuit and its application. Background technique [0002] At present, the power grid provides alternating current to thousands of households, while the lighting, television, electro-acoustic, computer and other electrical facilities that we commonly use all need direct current. In addition, all electric drive equipment that requires speed regulation (such as elevators, electric vehicles, high-speed rail, precision machine tools, etc.), as well as all equipment that requires precise control, also need direct current, and it is necessary to convert alternating current into direct current at the equipment side. to be used. [0003] The equipment side converts alternating current into direct current, which is generally rectified and filtered by capacitors. The rectified pulsating DC voltage can only become a stable DC voltage after filtering. The use o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/06
CPCH02M7/068Y02B70/10
Inventor 张逸兴
Owner 张逸兴
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