Constant-frequency active filter controlled by a peak current control mode
US6388900B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 2001 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Jan 5, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A constant-frequency active filter controlled by a peak current control mode, the constant-frequency active filter composes of a voltage step-up unit and a power factor corrector, wherein the power factor corrector is composed of a voltage control loop and a current control loop. The voltage step-up unit adjusts a waveform of an input current to a sine waveform. The voltage control loop has a microprocessor that provides a current command having the same phase with an input voltage to a PWM controller of the current control loop. The current control loop provides a sensing current induced from the input current to the PWM controller. The PWM controller receives the sensing current and the current command to control the input voltage and the input current to become the same phase so as to obtain a high power factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.