Speed control device for an electronically commutated multiphase electric motor
US6333610A · kind A · utility
10Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2000 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Oct 6, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A speed control device, whereby individual motor phases of an electronically commutated multiphase electric motor are supplied via corresponding individual phase shifters from a constant voltage supply unidirectionally and unpulsed during time blocks which are derived from stored time block pulse patterns specific to certain speeds. The speed control device permits setting a variety of speeds with relatively little expense and with low operating losses. The speed control device further provides a simple device for setting intermediate speeds by means of low-frequency switching between at least two time block pulse patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.