Method and apparatus for RMS measurements in induction motor without sampling
US5473241A · kind A · utility
9Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Jul 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/346
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and/or apparatus used with a motor controller for finding RMS current and RMS terminal voltage in a three phase AC induction motor using electrical values known to the controller. An equation relates average current to RMS current as a function of the duration of a known non-conducting period. Another equation relates known voltages to RMS terminal voltage as a function of a known phase angle and the known duration of the non-conducting period in a supply line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.