Single cycle positioning system
US5449990A · kind A · utility
3Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1993 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Apr 26, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/43177
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A single cycle positioning system utilizing a three phase wye connected induction motor (10) includes a three phase inverter (28) and a microprocessor (20) for controlling the inverter to generate three phases of power. Pulse width modulation techniques are utilized and in response to a start signal the frequency of the power to the motor is increased up to a running frequency, and in response to a stop signal the frequency of the power applied to the motor is decreased along with a corresponding reduction of the voltage applied to the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.