Design And Attributes Of Servo Motors

By Author: Repair Zone
Total Articles: 17
Comment this article

Servo motors come in many different configurations depending on the desired application. Variations on basic motor design include motion type, break load, speed, strength, weight, size and gearbox.

The role of servo motors in industrial machines is to transform various types of energy into mechanical energy. This important industrial component is made up of four major parts – DC motor, control circuit, gear reduction unit and a position-sensing device.

Various parts of the servo motor work in unison to allow it to receive control signals that represent the output of the servo shaft. The signals make the DC motor turn until the shaft is in the right position. The position-sensing device determines the amount of rotation in the shaft, thus controlling the direction in which the motor needs to turn to arrive at the correct position.

Unlike the regular motors, a servo motor has three wire connections – one wire connected to the power source, one wire to the ground and the third connected to the control. Motors must receive power from a constant source to function.

Some servo motors have ...
... a built-in rotation sensor that plays an important role in several industrial applications. These sensors can transmit information about the rotation of the motor on its axis making the application aware of the positions of its appendages. This feature is useful in applications such as robotics, movement of real boats and aeroplanes, and operation of remote-controlled model aeroplanes, helicopters, trains and boats.

Various servo motors have variations of the basic motor design offering a variety of attributes concerning speed, strength, motion type, break load, weight, size and gearbox. An industry determines the type of servo motors they require depending on their specific requirements and their budget.

Mechanisms in servo motors are capable of handling very high current surges which provides much stronger configurations. DC electric machines in the motors are compromised because the brushes in the machine can limit the capacity to negotiate high power rates. However, these devices are a more economical choice.

The type of controller and amplifier the machine is running on affects the application and performance of the machine. Servo motors have to be finely tuned with these components to reach their top performance for precise position control and smooth movement. There are minor differences in this regard between varying models of servo motors.

The switched reluctance servo motor is a kind of machine that induces non-permanent magnetic poles on the ferromagnetic rotor. Torque in the motor is generated through magnetic reluctance. These types of servo motors provide very high power density in an economic manner.

Servo motors are part of a closed-loop system that performs with use from a stepper motor. A quality servo motor will have the ability to operate at a range of different speeds without overheating and function at zero speed while retaining enough torque to sustain a load in position.

Whether you are planning to procure Allen Bradley, Indramat or Fanuc motors, make sure that the motors fits perfectly with your individual requirements. You should also collaborate with a reliable repair company that specializes in the repair of servo motors and other components of industrial machines. They will usually provide an exchange program enabling you to receive tested remanufactured motors in place of the faulty ones.

Author of this article is associated with Repair Zone that offers repair of industrial machines including Bradley Allen motors, Fanuc servo amplifiers and other components.