Control apparatus and control method for AC electric motor
US8531148B2 · kind B2 · utility
3Cited by
2References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 29, 2011 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Nov 11, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/0003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control apparatus and a control method for an AC electric motor detect DC bus current plural times at predetermined intervals during first and second predetermined periods and multiply vectors having integrated values of detected values during respective periods as elements by an inverse matrix of a matrix having integrated values during respective periods of sine and cosine functions of output voltage phase of an inverter at the moment that detection is made as elements to thereby estimate reactive and active currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.