A separately excited DC motor, its rated voltage UN = 220 V; rated speed nN =...

 

Transcribed Image Text:

A separately excited DC motor, its rated voltage UN = 220 V; rated speed nN = 1500 r/min; rated line current IN = 41.1 A, and the armature resistance Ra = 0.4 W, it is running at rated constant torque load (full load) condition, calculate the following: 1) Inserting a resistance Rad = 1.65 series with the armature circuit, calculate the steady speed of the motor. 2) Decreasing the voltage at 110 V, calculate the steady speed of the motor. 3) Decreasing the flux 10, calculate the steady speed of the motor. A separately excited DC motor, its rated voltage UN = 220 V; rated speed nN = 1500 r/min; rated line current IN = 41.1 A, and the armature resistance Ra = 0.4 W, it is running at rated constant torque load (full load) condition, calculate the following: 1) Inserting a resistance Rad = 1.65 series with the armature circuit, calculate the steady speed of the motor. 2) Decreasing the voltage at 110 V, calculate the steady speed of the motor. 3) Decreasing the flux 10, calculate the steady speed of the motor.

Answer rating: 100% (QA)

Heres how to find the steadystate speed of the motor The formula for the steadystate speed of a separately excited DC motor is n V IaRaK where n is the motor speed in RPM V is the applied voltage to t... View the full answer