Method and apparatus for measuring rotor resistance of induction motor
US9523739B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2013 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Oct 12, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present application discloses a method and an apparatus for measuring a rotor resistance of an induction motor, which method comprises: injecting a first voltage step signal into a test phase of the induction motor when the induction motor is at standstill; measuring and recording a current value I0+ at an initial moment of the first voltage step signal; and calculating the rotor resistance Rr of the induction motor based on a first current value Is1, a second current value Is2 and the current value I0+ at the initial moment, the first current value Is1 being equal to a steady-state current value corresponding to a voltage value before a step of the first voltage step signal, and the second current value Is2 being equal to a steady-state current value corresponding to a voltage value after the step of the first voltage step signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.