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

THE PERMANENT-MAGNET DC MOTOR

Induced Torque in a Series DC Motor

The Terminal Characteristic of a Series DC Motor