Title :
Voltage stress on induction motors in medium voltage (2300 to 6900 V) PWM GTO CSI drives
Author :
Wu, Bin ; Dewinter, Frank
Author_Institution :
Dept. of Electr. Eng., Ryerson Polytech. Inst., Toronto, Ont., Canada
Abstract :
This paper deals with voltage stress on induction motors in medium voltage PWM GTO current source inverter drives. The voltage stress on the motor in this transformerless drive is investigated. Analytical equations are derived for the calculation of the maximum peak line-to-ground voltage applied to the motor. It is demonstrated in the paper that this peak line-to-ground voltage could be twice as high as the rated peak line-to-neutral voltage of the motor. Computer simulation and experimental results on a 4160 V, 1250 hp induction motor drive are given for the verification of theoretical analysis. This paper provides a valuable design guidance for the insulation of medium voltage motors used in this type of drives
Keywords :
DC-AC power convertors; PWM invertors; digital simulation; electric machine analysis computing; induction motor drives; machine testing; machine theory; thyristor convertors; 1250 hp; 2300 to 6900 V; 4160 V; MV; PWM GTO CSI; analytical equations; computer simulation; current source inverter; design guidance; experiments; induction motor drive; insulation; peak line-to-ground voltage; peak line-to-neutral voltage; transformerless drive; voltage stress; Costs; Delay; Induction motors; Insulation life; Medium voltage; Power transformer insulation; Power transformers; Pulse width modulation; Pulse width modulation inverters; Stress;
Conference_Titel :
Power Electronics Specialists Conference, 1995. PESC '95 Record., 26th Annual IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-2730-6
DOI :
10.1109/PESC.1995.474956
