Transition scheme for position sensorless control of AC motor drives
US9374028B2 · kind B2 · utility
14Cited by
23References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 10, 2014 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Dec 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/21
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Motor drive control apparatus and methods are presented for sensorless control of a driven motor using open loop current regulated control during low-speed operation and an EMF-based position observer for position estimation during higher speed operation, with zero feedback speed during low-speed open-loop operation and feedback speed estimated by the EMF-based observer during high-speed operation and with velocity mode control over the full speed range and mode control hysteresis for smooth transitions between open loop and EMF-based observer control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.