Method of, and apparatus for, regulating the rotational speed of an electric motor in a four quadrant mode of operation
US4818923A · kind A · utility
0Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Jan 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/923
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inexpensive and reliable regulating apparatus contains between a regulating unit and an electric motor series-connected therewith a feedback path for a single tachometer signal and including a band-pass filter. The band-pass filter determines the operating range of the electric motor. The regulating unit is constructed such that during operation the electric motor is supplied with power only when a signal from the feedback path arrives at the regulating unit. Under the action of external disturbances the supply of power is interrupted at least for a predetermined duration of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.