Delay compensation for stable current regulation when using variable-delay random PWM switching
US6972534B1 · kind B1 · utility
28Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2004 |
| Grant date | Dec 6, 2005 |
| Priority date | — |
| Expiry date | Sep 3, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control system for an electric machine having a rotor position sensor that generates a rotor position signal, a velocity module that generates an electric angular velocity value based on the rotor position signal, a random pulse width modulation module that generates a switching period and a delay for a current cycle, and a phase angle compensation module that sums a sample rate, one half of the switching period, and the delay of a previous cycle and that outputs a delay time. The phase angle compensation module further multiplies the delay time and the electric angular velocity value and generates a compensating angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.