An electric motor is an electric machine that transforms electric power into mechanical energy. The interaction between the magnetic field and electric current in a wire winding is the basis for most of the electric motors to generate force by turning a shaft.
What are the major industrial applications of servo motors?
Servo motor is also called servos. They are rotary actuators devices for accurate speed control, torque and angular position. It has some capabilities that a standard motor does not have as it moves the different parts of the machine with high efficiency and with great precision. A signal (data) better known as the pulse-width modulator (PWM) controls the servo motor.
The servo consists essentially of a motor (AC or DC), a gear system, a position sensor and a circuit control. In the case of DC motors, the motor is powered by a battery source which results to run the motor at high speed and low torque. The gear and shaft connected to the DC motors lower this rate to higher torque and speed.
The position sensor senses the shaft position and feeds the information to the control circuit. The control circuit thus decodes the signal from its position sensor and compares the current position of the motors to the desired position and therefore determines the rotational direction of the DC motor to achieve the correct position. In general, the Servo motor requires a 4.8V to 6 V DC supply.
Servo motors are small and powerful. They are mostly used for applications that require fast speed changes without the motor being overheated.