Title:
RIPPLE CURRENT CONTROL METHOD AND SYSTEM, AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/165815
Kind Code:
A1
Abstract:
The present application provides a ripple current control method and system, and a device. The method can be applied to a PFC+CLLC circuit. Output current of a CLLC circuit is collected, a ripple current peak-to-peak value in the output current is calculated, whether output voltage VPFC of a PFC circuit needs to be adjusted is determined in combination with a threshold, and if yes, the output voltage VPFC of the PFC circuit is adjusted by means of a control module. By using the characteristic of the CLLC circuit that voltage change will cause change of the working frequency, the CLLC circuit is enabled to avoid the resonant frequency, thereby eliminating ripple current in the output current of the circuit, making direct current output by the circuit stable, and solving the problem that the ripple current affects the service life of a vehicle-mounted power battery.
Inventors:
JIANG FANGLIN (CN)
ZHAO DEQI (CN)
WU RENHUA (CN)
ZHAO DEQI (CN)
WU RENHUA (CN)
Application Number:
PCT/CN2021/075880
Publication Date:
August 11, 2022
Filing Date:
February 07, 2021
Export Citation:
Assignee:
SHINRY TECH CO LTD (CN)
International Classes:
H02J7/02; H02M1/14
Foreign References:
| CN107791855A | 2018-03-13 | |||
| CN110536516A | 2019-12-03 | |||
| CN102790433A | 2012-11-21 | |||
| CN108322025A | 2018-07-24 | |||
| US20160288660A1 | 2016-10-06 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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