Apparatus and method for controlling transition between PWM and linear operation of a motor
US5723963A · kind A · utility
15Cited by
19References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive control circuit for operation in both linear and PWM modes includes a switchably connected compensation network. The compensation network has a capacitor that provides control loop compensation. To avoid transient effects during the settling time upon transitions from one mode to the other, the switch connecting the compensation network in the circuit is closed only during linear operation and not during PWM mode operation. When the switch is open, the capacitor holds a previously attained potential that is reapplied to the circuit when the switch is again closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.