インバータ駆動非接地モータの軸電圧とベアリング電流の解析 [in Japanese] Analysis of Shaft Voltage and Bearing Current in an Inverter-Fed Nongrounded Motor [in Japanese]
Access this Article
Search this Article
This paper analyzes shaft voltage and bearing current in a nongrounded motor driven by a voltage-source PWM inverter. First, the shaft voltage of the nongrounded motor is measured. The experimental results indicate that a bearing current, which can not be explained by the conventional theory, exists, and that the bearing current may shorten the life of the motor bearing. To investigate the mechanism, some experiments and parameter measurements are done, and simulation models are built. As a result, it is shown that this issue is caused by unbalance in the inductance and stray capacitance of the motor windings and these resonant phenomena.
- IEEJ Transactions on Sensors and Micromachines
IEEJ Transactions on Sensors and Micromachines 127(3), 286-292, 2007-03-01
The Institute of Electrical Engineers of Japan