Voltage-sharing control circuit and control method thereof

A technology of voltage equalization control and circuit, which is applied in the direction of control/regulation system, electrical components, and adjustment of electric variables, etc., which can solve the problem of DC power supply unable to equalize voltage and achieve the effect of voltage equalization control

Pending Publication Date: 2021-01-15
HEFEI KEWELL POWER SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention lies in the problem that the prior art DC power supply cannot equalize the voltage when outputting with no load or light load

Method used

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  • Voltage-sharing control circuit and control method thereof
  • Voltage-sharing control circuit and control method thereof
  • Voltage-sharing control circuit and control method thereof

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] Such asfigure 1 As shown, a voltage equalization control circuit includes three main power circuits connected in series, a sampling circuit U1 and a main control chip U2, the output terminals of the three main power circuits are all connected to the input terminals of the sampling circuit U1, and the sampling The output terminal of the circuit U1 is connected to the main c...

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Abstract

The invention discloses a voltage-sharing control circuit and a control method thereof. The control circuit comprises three main power circuits connected in series, a sampling circuit and a main control chip, the output ends of the three main power circuits are connected with the input end of the sampling circuit, and the output end of the sampling circuit is connected with the main control chip;the main control chip is connected with the control ends of the three main power circuits respectively, each main power circuit comprises a full-bridge conversion module, a resonance module, a rectification module and a filtering module, and the full-bridge conversion module, the resonance module, the rectification module and the filtering module are connected in sequence; when a direct-current power supply outputs in a light-load or no-load mode, the three main power circuits carry out PWM control in a copy wave sending mode, meanwhile, the output voltage-sharing rings of the two main power circuits work to carry out drive signal duty ratio fine adjustment, and voltage-sharing control is achieved. The circuit provided by the invention has the advantage of solving the problem that the voltage of the direct-current power supply cannot be equalized during no-load or light-load output.

Description

technical field [0001] The invention relates to the field of electronic equipment for measurement and testing, and more particularly relates to a voltage equalization control circuit and a control method thereof. Background technique [0002] In the field of electronic technology, DC test power supply is one of the essential test instruments for power electronics companies. Since many devices under test require high-voltage testing, our DC test power supply is required to provide high-voltage output to meet various test environments. . The full-bridge conversion is currently a commonly used topology for high-frequency DC test power supplies, and the full-bridge conversion topology is limited by the development level of existing semiconductor devices, making it difficult to achieve high-voltage output in a single channel, so multiple channels in series will be used to achieve high voltage. Output, but the duty cycle of the main control signal is very small when the output is...

Claims

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Application Information

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IPC IPC(8): H02M3/28H02M3/335H02M1/32
CPCH02M3/28H02M3/33576H02M1/32Y02B70/10
Inventor 陈亚东赵涛蔡振鸿唐德平
Owner HEFEI KEWELL POWER SYST CO LTD
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