Pulse width modulation control system
US6792042B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2000 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Oct 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a pulse width modulation control system which is capable of preventing arm short phenomenon and controlling a operation circuit precisely by securing dead time. The present invention comprises a counter which sets initial voltage value differently and outputs chopping wave crossed at its maximum voltage value and minimum voltage value, an adder/subtracter which adds/subtracts signal generated by the counter, a reference voltage value generation unit which is inputted signal outputted from the adder/subtracter and outputs two different reference voltage values to single chopping wave, a comparator which compares reference voltage value generated by the reference voltage value generation unit with voltage value outputted from the adder/subtracter, and an output control unit which outputs PWM (Pulse Width Modulation) positive signal (SPWM+) or PWM (Pulse Width Modulation) negative signal (SPWM−) in accordance with the output voltage value of the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.