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Single pulse width modulator multi-channel isolated output circuit and isolated output method

A technology of isolated output and modulator, which is applied in the direction of adjusting electric variable, converting device of output power, converting DC power input to DC power output, etc. It can solve the problems of large volume, complex circuit, and many devices, and achieve high conversion efficiency , the circuit is simple, the effect of using less components

Pending Publication Date: 2019-03-01
NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional multi-channel isolated independent output switching power supply often adopts multi-pulse width modulator (PWM) control circuit, the circuit is complex, there are many components, and the volume is large.

Method used

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  • Single pulse width modulator multi-channel isolated output circuit and isolated output method
  • Single pulse width modulator multi-channel isolated output circuit and isolated output method
  • Single pulse width modulator multi-channel isolated output circuit and isolated output method

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing:

[0021] Such as figure 1 As shown, the multi-channel isolated output circuit of the single pulse width modulator in this embodiment includes a multi-winding transformer 11, a plurality of output rectification filter circuits 8 and a plurality of dynamic load compensation circuits 9, and the multi-winding transformer 11 includes a plurality of secondary windings , the output rectifying and filtering circuit 8 includes a first output rectifying and filtering circuit 12, a second output rectifying and filtering circuit 13, ... and an n-th output rectifying and filtering circuit 14, and the dynamic load compensation circuit 9 includes an overload compensation circuit 15, a first dynamic load Compensation circuit 16, ... and the nth road dynamic load compensation circuit 17; the output terminals of the first output rectification filter circuit 12, the second output rectification ...

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Abstract

The present invention relates to a single pulse width modulator multi-channel isolated output circuit and isolated output method. The single pulse width modulator multi-channel isolated output circuitcomprises a multi-winding transformer, a plurality of output rectifying and filtering circuits and a plurality of dynamic load compensating circuits. The multi-winding transformer comprises a plurality of secondary windings; the input ends of the output rectifying and filtering circuits are respectively connected with the respective secondary windings of the multi-winding transformer; the outputend of each output rectifying and filtering circuit is connected in series with a dynamic load compensating circuit; the output ends of the dynamic load compensating circuits are connected with the loads; the input end of the multi-winding transformer is connected with the output end of an input filtering circuit via a power switch tube; and the control end of the power switch tube is connected with a control circuit. According to the technical scheme of the present invention, multi-channel voltage isolated and independent output can be achieved, and the output voltage imbalance of each channel can be effectively compensated at the same time; and the technical scheme has the characteristics of a wide input voltage range, less devices, a small size, isolation of each channel, high conversion efficiency, and the like, and can be widely used in the field of switching the power supply.

Description

technical field [0001] The invention relates to an isolated output circuit, in particular to a single pulse width modulator multi-channel isolated output circuit and an isolated output method. Background technique [0002] Switching power supplies are widely used in electronic systems such as aerospace, aviation, weapons, and industry. With the development trend of high reliability, high efficiency, and lightweight equipment power distribution, multi-channel isolated output power supplies are widely used. Traditional multi-channel isolated independent output switching power supply often adopts multi-pulse width modulator (PWM) control circuit, the circuit is complicated, there are many components, and the volume is large. Contents of the invention [0003] The purpose of the present invention is to provide a single pulse width modulator multi-channel isolated output circuit and an isolated output method, which can realize multi-channel voltage isolation and independent out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33561
Inventor 郭靖吴磊胡进杨正男赵隆冬解光庆
Owner NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC
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