Brushless DC motor coupled directly to AC source and electric apparatus using the same motor
US7262568B2 · kind B2 · utility
16Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2004 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Jul 26, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless DC motor is disclosed, in which a commercial AC source is full-wave rectified by a rectifier and then converted into a generally flat and low DC voltage not more than 45V by a DC voltage converter. The low DC voltage is applied in a full-wave driving method to a stator coil via an inverter circuit formed of switching elements in a bridge configuration. This structure allows obtaining the brushless DC motor coupled directly to the AC source, and the torque ripples and uneven rotation of the motor are suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.