In order to make YBBP 500-2 500 kW 10 kV flameproof high-voltage three-phase induction motor use in ExdbⅡ CT4 Gb environment and operate for a long time under con-dition of the variable frequency from 25 Hz to 60 Hz and the speed at 3500 r/min(about 58.3 Hz),this paper demonstrates the electromagnetic and structural design points,and veri-fies by experiment that the motor design scheme meets the needs of users.At the same time,the measures that reducing the vibration amplitude of motor and adopting a tie rod structure of rotor core have ensured that the no-load vibration value of the motor is below 1.0 mm/s.
Low vibrationhigh speedgrade four flameproof constructionmotor design scheme
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