Motor control device and electric compressor
US9780714B2 · kind B2 · utility
0Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 2013 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Oct 17, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/0241
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control device of the present invention supplies a detection current to a motor at predetermined time intervals, detects a voltage between the both ends of a smoothing capacitor when the detection current is supplied, and determines whether a connector is inserted or unplugged based on a change in the voltage between the both ends of the smoothing capacitor. Furthermore, if determining that the connector is unplugged, the motor control device decreases the voltage between the both ends of the smoothing capacitor to or below a defined value by discharging the smoothing capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.