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DC MOTORS
• DC motors are often compared by their speed regulations. The speed regulation
• (SR) of a motor is defined by
THE EQUIVALENT CIRCUIT OF A DC MOTOR
THE MAGNETIZATION CURVE OF A DC MACHINE
The internal generated voltage EA of a dc motor or generator is given by Equation
SEPARATELY EXCITED AND SHUNT DC MOTORS
The equivalent circuit of a shunt dc motor
The Terminal Characteristic of a Shunt DC Motor
The Terminal Characteristic of a Shunt DC Motor
Speed Control of Shunt DC Motors
INSERTING A RESISTOR IN SERIES WITH THE ARMATURE CIRCUIT