CURRENT SAMPLING CIRCUIT BASED ON BRIDGE CIRCUIT

Title:

CURRENT SAMPLING CIRCUIT BASED ON BRIDGE CIRCUIT

Document Type and Number:

WIPO Patent Application WO/2022/252622

Kind Code:

A1

Abstract:

The present application discloses a current sampling circuit based on a bridge circuit, comprising: a first rectifier bridge arm formed by connecting a first switch tube and a second diode in series, and a second rectifier bridge arm formed by connecting a second switch tube and a first diode in series, wherein the first rectifier bridge arm and the second rectifier bridge arm are connected in parallel, a common node of the first switch tube and the second diode forms a midpoint of the first rectifier bridge arm, and a common node of the second switch tube and the first diode forms a midpoint of the second rectifier bridge arm; and a detection resistor unit connected in parallel to the first rectifier bridge arm and the second rectifier bridge arm. According to the present application, a peak current controller controls a bridge unit and the switch tubes of a rectifier circuit, so that the problem of reverse current of a primary side of a transformer caused by starting of secondary side synchronous rectification is prevented, the safety of the circuit is effectively protected, and the interval of current sampling can be controlled, so as to avoid sampling the negative current of the transformer, and ensure the working stability of the circuit.

Inventors:

XU CHENTING (CN)
TAO SILI (CN)
HE QIANG (CN)
PING DINGGANG (CN)

Application Number:

PCT/CN2022/071113

Publication Date:

December 08, 2022

Filing Date:

January 10, 2022

Export Citation:

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Assignee:

ZHEJIANG EV TECH CO LTD (CN)

International Classes:

H02M1/00

Foreign References:

CN113067457A	2021-07-02
CN102255513A	2011-11-23
CN111431423A	2020-07-17
CN203911764U	2014-10-29
CN101425751A	2009-05-06
CN202513825U	2012-10-31
JP2015070750A	2015-04-13
CN201220255724U	2012-06-01

Other References: