| Title |
A Study on Analysis of Inverter-fed Induction Motor's Bearing Current using Improved Equivalent Ciruit Parameters |
| Authors |
김병택(Kim, Byung-Taek) ; 구대현(Koo, Dae-Hyun) ; 홍정표(Hong, Jung-Pyo) ; 권병일(Kwon, Byung-Il) ; 전지훈(Jun, Ji-Hoon) |
| Keywords |
Bearing Current ; Shaft Voltage ; Inverter ; FEM ; Induction Motor |
| Abstract |
An inverter driven induction motor has more superior dynamic characteristic than sine wave driven induction motor. But it has a problem with shaft voltage and bearing current in drive-motor system. This paper presents the analysis of bearing current in inverter-fed induction motor. The proposed method is based on using numerical method (FEM) to derive parasitic parameters in motor. Using the electric field analysis with FEM, the stored energy in dielectric materials of the motor can be calculated and the parasitic capacitances are obtained. Then we compared the proposed method with a conventional method in variable frequency and load conditions. From the comparision of simulation and experiment result, we confirmed that the proposed method is valid. |