Method and circuit for controlling sensorless single-phase BLDCM
US7459878B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2006 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Feb 8, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/182
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The method and circuit for controlling a sensorless single-phase BLDCM having a stator with a winding are proposed. The provided controlling circuit includes a power supply circuit, an inverter coupled to the winding and the power supply circuit, a BEMF detecting circuit coupled to the winding and the inverter and measuring a BEMF of the winding, and a controller coupled to the power supply circuit, the inverter and the BEMF detecting circuit and analyzing a status of the BEMF to control the BLDCM accordingly. The provided method is based on the motor winding time-sharing theory, and the controller controls the inverter to make the winding used as a driving element with loading current when the absolute value of the BEMF is relatively large and as a sensing element when the absolute value of the BEMF is relatively small.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.