Method for pulse width modulation frequency correlation
US6456512B1 · kind B1 · utility
2Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2001 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Apr 6, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0077
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for PWM frequency correlation of the present invention is disclosed. In that, 2×M PWM signals G1-Gn are supplied to control ends (gates) of the switch elements (such as MOSFET) Q1-Qn of the D. C. boost circuit, where M is a prime number larger than 1, and the PWM signals G1, G3, G5, . . . , Gn−1 are synchronous, and have a phase difference of 180 degrees/M, and the PWM signals G2, G4, G6, . . . , Gn are synchronous, and have a phase difference of 180 degrees/M. by this design, a ripple current and EMI interference to the battery as the PWM signal is switched are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.