Method and device for controlling a multiphase electronically commutated motor
US7285930B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2006 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Apr 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is specified for controlling a multiphase motor that is commutated by an inverter-side bridge circuit, in the course of which a particularly precise and technically simple detection of a control-relevant variable of a considered motor phase, in particular of a motor phase current and/or a back EMF voltage and/or a variable derived therefrom, takes place. It is provided here to determine the control-relevant variable with the aid of the current state of a freewheeling diode that is disposed in a phase half bridge, assigned to the respective motor phase, of the bridge circuit, the current state being detected during an on time in which a power switch, connected in parallel with the freewheeling diode, of the phase half bridge exhibits a conducting state, and a power switch connected in series with the freewheeling diode exhibits a blocking state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.