Method of PWM driving a brushless motor with digitally stored voltage profiles with reduced losses
US6137253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1999 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Feb 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is for driving a multiphase brushless motor with N windings connected in a star or in a polygonal configuration. The windings are driven according to a certain periodic voltage profile. The method includes cyclically keeping for a certain time interval at least one of the N windings in a fixed state of low or high saturation and applying to the other phase windings instantaneous voltages according to a predefined different periodic voltage profile such that the resultant voltages on the windings are coherent with the certain periodic voltage profile. The number of intervals, in an entire electrical period, in which the fixed high or low saturation state of one winding is produced, depends on the predefined driving profile and upon the number N of windings of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.