Title:
CURRENT CONTROL CIRCUIT AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/155799
Kind Code:
A1
Abstract:
A current control circuit. Current information of an output side of a bidirectional converter is obtained by a current sampling circuit, outputs of a first voltage regulation circuit and a second voltage regulation circuit are used as an input of an error amplifier, an output of the error amplifier is used as an input of an optical coupling feedback circuit, a current signal on the output side is fed back to a PWM circuit through conversion processing of circuits at all levels, and a control circuit controls duty ratio of input side switch tubes (Q1, Q2) in a main power circuit to implement constant current of the output side. The current control circuit can ensure that the bidirectional converter has no current oscillation and current spike when switching a working direction, and can also implement the constant current of the output side of the bidirectional converter when only one forward bandgap voltage reference source is used, and the circuit is simple.
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Inventors:
LI BINHUA (CN)
LI YONGCHANG (CN)
LI YONGCHANG (CN)
Application Number:
PCT/CN2019/119641
Publication Date:
August 06, 2020
Filing Date:
November 20, 2019
Export Citation:
Assignee:
MORNSUN GUANGZHOU SCI & TECH (CN)
International Classes:
H02M3/335
Foreign References:
| CN109842301A | 2019-06-04 | |||
| CN202918198U | 2013-05-01 | |||
| CN101471602A | 2009-07-01 | |||
| CN106291045A | 2017-01-04 | |||
| CN103023320A | 2013-04-03 | |||
| US20110057575A1 | 2011-03-10 |
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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