Double-edge, stackable PWM with built-in feedforward
US7332898B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2007 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Apr 2, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for use in a multi-phase power system. The power system is of the type having a plurality of Pulse Width Modulation (PWM) controllers including a first PWM controller and at least one second PWM controller. The first PWM controller generates at least one first PWM output signal based on a cyclic signal having a cyclically recurring parameter, and provides the cyclic signal including the cyclically recurring parameter to the second PWM controller. The second PWM controller generates at least one second PWM output signal based on the cyclic signal, and synchronizes the generation of the first and second output signals using the cyclically recurring parameter within the cyclic signal, thereby maintaining a predetermined phase relationship between the first and second output signals. The second PWM controller generates a cyclic, triangular RAMP waveform signal having a series of periods, the RAMP waveform having in each period a signal rising portion and a signal falling portion, and compares the RAMP waveform against an error signal to generate the second PWM signal, the RAMP waveform rising portion and falling portion being generated by charging and discharging…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.