Motor drive control with a single current sensor using space vector technique
US7612522B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 7, 2007 |
| Grant date | Nov 3, 2009 |
| Priority date | — |
| Expiry date | Dec 19, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive system for a three phase brushless AC motor is arranged to optimize the transistor switching pattern to improve power output whilst allowing current measurement in all of the phases using a single sensor. This is achieved by defining voltage demand vectors x where more than two states are required to meet a minimum state time requirement determined by the single sensor method, and calculating three or more state vectors which produce the demanded vector x whilst still allowing single current sensing. Various methods of optimising the PWM pattern so as to give maximum output whilst using single current sensing are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.