Open/close body drive device
US7609017B2 · kind B2 · utility
2Cited by
3References
4Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 23, 2006 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Oct 10, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/55
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The open/close body drive device is capable of restarting a brushless motor, without using magnetic pole sensors, so as to securely drive an open/close body in an arbitrary direction when any of the magnetic pole sensors has failed. When a CPU (1) detects an abnormal logic as a detection pattern of the magnetic pole sensors (9), the CPU (1) determines that the sensor has failed and temporarily stops drive of a DC brushless motor (5), and a motor drive unit (4) generates a phase switching signal to prolong one of electric connection patterns for performing sensorless drive when restarting the DC brushless motor (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.