A comparison with insulation system for PWM-inverter-fed induction motors

Author

Hwang, Don-Ha ; Park, Doh-Young ; Kim, Yong-Joo ; Lee, Young-Hoon ; Kim, Dong-Hee ; Lee, In-Woo ; Hur, Ick-Goo

Author_Institution

Mechatronics Res. Group, Korea Electrotechnol. Res. Inst., Changwon, South Korea

Volume

1

fYear

2001

fDate

2001

Firstpage

72

Abstract

The winding insulation of low-voltage induction motors in adjustable-speed drive system with voltage-fed inverters is substantially stressed due to the uneven voltage distribution and excessive voltage stress (dv/dt), which result in the premature insulation breakdown. This paper describes test results of the insulation characteristics from 20 HP, 380 V induction motors for inverter applications. Five different types of insulation techniques are applied to 19 induction motors. The insulation characteristics are compared to partial discharge, capacitance, AC current, and dissipation factor tests. Also, the insulation breakdown tests by high voltage pulses are performed, and the corresponding breakdown voltages are obtained

Keywords

PWM invertors; capacitance; capacitance measurement; dielectric loss measurement; electric current measurement; induction motor drives; insulation testing; machine insulation; machine testing; partial discharge measurement; stators; variable speed drives; 20 hp; 380 V; AC currents; PWM-inverter-fed induction motors; adjustable speed drive system; capacitance; dissipation factor tests; electrical breakdown; high voltage pulses; insulation characteristics; low-voltage induction motors; partial discharge; premature insulation breakdown; uneven voltage distribution; voltage stress; winding insulation; Breakdown voltage; Capacitance; Induction motors; Insulation testing; Partial discharges; Performance evaluation; Pulse width modulation; Pulse width modulation inverters; Stress; Variable speed drives;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on

Conference_Location

Shenyang

Print_ISBN

7-5062-5115-9

Type

conf

DOI

10.1109/ICEMS.2001.970612

Filename

970612