eng.saeed
Newbie level 6
Hi everybody...
Can anybody help me solve this problem about DC motor manually and by using software (i.e matlab, C++,etc..)..? Please..
here it is:
A dc series motor drives an elevator load that requires a const. torque of 200 N.m. The dc supply voltage is 400 V and the combined resistance of the armature and series field winding is 0.75 Ω. Neglect rotational losses and armature reaction effect.
1) the speed of the elevator is controlled by solid-state chopper. At 50% duty cycle (i.e., α = 0.5) of the chopper, the motor current is 40 A. Determine the speed and horsepower output of the motor and the efficiency of the sys.
2) The elevator is controlled by inserting resistance in series with the armature of the series motor. For the speed of part (1), determine the values of the series resistance, horsepwer output of the motor, and efficiency of the sys.
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Can anybody help me solve this problem about DC motor manually and by using software (i.e matlab, C++,etc..)..? Please..
here it is:
A dc series motor drives an elevator load that requires a const. torque of 200 N.m. The dc supply voltage is 400 V and the combined resistance of the armature and series field winding is 0.75 Ω. Neglect rotational losses and armature reaction effect.
1) the speed of the elevator is controlled by solid-state chopper. At 50% duty cycle (i.e., α = 0.5) of the chopper, the motor current is 40 A. Determine the speed and horsepower output of the motor and the efficiency of the sys.
2) The elevator is controlled by inserting resistance in series with the armature of the series motor. For the speed of part (1), determine the values of the series resistance, horsepwer output of the motor, and efficiency of the sys.
[/list][/code]