Title :
Leakage current reduction for a high-frequency carrier inverter feeding an induction motor
Author :
Murai, Yoshihiro ; Kubota, Takehiko ; Kawase, Yoshihiro
Author_Institution :
Dept. of Electr. Eng., Gifu Univ., Japan
Abstract :
A PWM inverter with an induction motor often has a problem with a leakage current that flows through the distributed electrostatic capacitance from the motor windings to the ground. The authors present an analytical model of the system with leakage current and the strategy to suppress it. Two types of suppression circuit are discussed. The current-type circuit, although compact in size, not only acts as an excellent suppressor but also becomes a high-performance filter of the output voltage
Keywords :
induction motors; invertors; machine theory; pulse width modulation; PWM inverter; current-type circuit; distributed electrostatic capacitance; filter; high-frequency carrier inverter; induction motor; leakage current reduction; motor windings; output voltage; potential type circuit; suppression circuit; Capacitance; Circuits; Filters; Frequency; Induction motors; Leakage current; Pulse transformers; Pulse width modulation inverters; Transformer cores; Voltage;
Journal_Title :
Industry Applications, IEEE Transactions on
