Motor drive system for AC motors
US7064514B2 · kind B2 · utility
20Cited by
3References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 20, 2004 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Feb 20, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive system without any portion for directly detecting the rotor position, rotation speed and motor phase currents, capable of realizing a high-performance variable speed drive even at high carrier frequencies. When detecting a current from a DC power supply of an inverter for driving a motor, applied voltages and frequencies to the motor are controlled based on sampled values by sampling a current flowing as intermittent pulses in the vicinity of each power conduction time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.