Patent ID: 7646202
Filing Date: 2010-01-12
Classification: G01R

Abstract:
1. A static measuring method of electrical references of a three-phase permanent magnet synchronous motor (PMSM), comprising: a) applying a voltage to the PMSM by a transducer; b) controlling an output current of the PMSM to achieve 100% of a rated current of the PMSM; c) recording a first voltage; d) controlling the output current to achieve 150% of the rated current of the PMSM; e) recording a second voltage; f) computing a resistance of the PMSM by the difference of the first voltage and the second voltage and the difference of the 100% and 150% of the rated current of the PMSM; g) setting a plurality of output voltage vectors, and selecting one of the output voltage vectors; h) performing a voltage cycle, the voltage cycle comprising: i) switching the other one of the output voltage vectors, and repeating the steps from g to h till completing all of the output voltage vectors; and j) using the rising time and the resistance of the PMSM to compute an inductance of the PMSM.