Title:
ADAPTIVE POWER CONTROL FOR TWO-STAGE AC/DC OR DC/DC ISOLATED POWER CONVERTERS
Document Type and Number:
WIPO Patent Application WO/2023/245864
Kind Code:
A1
Abstract:
A two-stage power converter has a Power-Factor Converter (PFC) and a Dual Active Bridge (DAB) converter connected together by a DC link voltage. The DAB converter outputs a battery voltage with a battery current. A PFC controller divides a reference power constant by the battery voltage to get a battery current reference that is multiplied by a constant and compared to the DC link voltage to adjust Pulse-Width-Modulation (PWM) control signals to the PFC. The reference power constant is compared to the battery current during Constant-Power mode to cause a DAB controller to modulate duty ratio and phase difference between primary and secondary-side PWM control signals to the DAB converter. The DAB converter duty ratio and phase difference are modulated by comparing the battery current to a battery current limit during Constant-Current mode and by comparing the battery voltage to a battery voltage limit during Constant-Voltage mode.
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Inventors:
CHAN YIU PANG (CN)
LI TIN HO (CN)
YEUNG KAI WING ANDY (CN)
LI QINGCHUN (CN)
LI TIN HO (CN)
YEUNG KAI WING ANDY (CN)
LI QINGCHUN (CN)
Application Number:
PCT/CN2022/115765
Publication Date:
December 28, 2023
Filing Date:
August 30, 2022
Export Citation:
Assignee:
HONG KONG APPLIED SCIENCE & TECH RESEARCH INST CO LTD (CN)
International Classes:
H02M3/335; H02J7/06
Foreign References:
| US20180076723A1 | 2018-03-15 | |||
| CN109980761A | 2019-07-05 | |||
| CN109361318A | 2019-02-19 | |||
| CN107994777A | 2018-05-04 | |||
| US20210313870A1 | 2021-10-07 |
Attorney, Agent or Firm:
IDEA INTELLECTUAL (SHENZHEN) IP AGENCY (CN)
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