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resistance of the armature and series field winding is 0.75Ω. Neglect rotational losses and armature reaction effect.
(a) The speed of the elevator is controlled by a solid-state chopper. At 50% duty cycle (i.e., α=05) of the chopper, the motor current is 40 amps. Determine the speed and the horsepower output of the motor and the efficiency of the system.
(b) The elevator is controlled by inserting resistance in series with the armature of the series motor. For the speed of part(a), determine the values of the series resistance, horsepower output of the motor, and efficiency of the system.
(a) The speed of the elevator is controlled by a solid-state chopper. At 50% duty cycle (i.e., α=05) of the chopper, the motor current is 40 amps. Determine the speed and the horsepower output of the motor and the efficiency of the system.
(b) The elevator is controlled by inserting resistance in series with the armature of the series motor. For the speed of part(a), determine the values of the series resistance, horsepower output of the motor, and efficiency of the system.
추천자료
- 가격1,000원
- 페이지수4페이지
- 등록일2010.01.29
- 저작시기2008.5
- 파일형식한글(hwp)
- 자료번호#579158
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