Control apparatus of brushless motor and machine and apparatus using brushless motor
US6191545A · kind A · utility
73Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Mar 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A phase signal generation circuit is constituted by using a comparison circuit 10, a delay circuit 11, a gate signal preparation circuit 13, and a selection holding circuit 12. A phase signal generated in the phase signal generation circuit 9 is pattern recognized in a control circuit 6 and a position of a rotor is detected and a PWM control area, PAM control, and a change-over PWM/PAM is carried out. The rotor position detection accuracy can be heightened and a wide control. range can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.