Peak current control for a power switch of a power converter
US10530255B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2018 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | Jun 21, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0029
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Control circuitry for controlling the duty cycle of a magnetizing switch of a power converter containing a demagnetizing switch is described. The magnetizing switch and the demagnetizing switch are switched on within a sequence of commutation cycles in a mutually exclusive manner. The control circuitry is configured, within a commutation cycle from the sequence of commutation cycles, to determine a sensed current signal indicative of a current through the magnetizing switch. The control circuitry determines a ramp signal by adding a slope compensation signal to the sensed current signal. The control circuitry determines a threshold signal and determines a duty cycle for the magnetizing switch for the commutation cycle by comparing the ramp signal with the threshold signal. The threshold signal and/or the slope compensation signal depend on the duty cycle for the magnetizing switch of a preceding commutation cycle from the sequence of commutation cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.