Power converter with average current limiting
US9146571B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2013 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | Jul 21, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a control method for a buck power converter, an output voltage is generated according to a pulse width modulation signal and an input voltage; an error signal is generated by sampling the output voltage and differencing the sampled output voltage and an output voltage reference; a duty ratio that defines a duty cycle of a pulse width modulation signal is determined by a control law; the pulse width modulation signal is generated by providing the duty ratio to a digital pulse width modulator; a steady state or a load transient is detected; and an average inductor current is monitored and a difference between the average inductor current and a specific inductor current limit is accumulated in order to generate an offset value which is subtracted from the output voltage reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.