Power output device
US6548984B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2001 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Jul 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/4803
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
When the absolute values of the negative voltage V− and the positive voltage V+ of a rectangular wave to be applied to the three phase coils of the motor driven using a rectangular-waved voltage are different, time T1 and time T2 for the rectangular wave are adjusted such that the area A representing the absolute value of a time integration value of the negative voltage V− and the area B representing the absolute value of a time integration value of the positive voltage V+ becomes equal to each other. With this adjustment, the average voltage of the rectangular wave becomes of value 0, so that a DC component current is prevented from flowing into the three phase coils of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.