7 Common Types of Electric Motors

Electric motors can be found in distinctively diverse types, but the purpose of all is the same, to convert electrical energy into mechanical. Then what is the purpose of making different electric motors when everyone does the same job? That’s because one motor can not be aligned with the targets and performance of every system; therefore, to meet the need, multiple numbers of electric motors came to be that were designed to be suitable for specific purposes. In planning a motor-controlled system, the selection of the motor is crucially important; it must line up with the targets and performance of the system. Therefore, for the right selection, it is better to understand each type of electric motor, and we have covered it all in this article.

  • AC Brushless Motor:

An AC brushless motor is the most common type of electric motor and is very popular for its motion control. This motor has a rotating magnetic field for induction which is generated in its stator for turning rotor and stator at a harmonizing rate. They operate on permanent electromagnets and rely on them entirely. They make significantly less noise and ensure that operations are spark-free.

  • DC Brushed Motor:

A DC brushed motor is designed internally as a commutator and operates on direct current. The commutator is the most important thing of any DC brushed motor. In this motor, the orientation of its brush on the stator directs the current flow. However, in some DC brushed motors, the orientation of the brush compared to the bar segments of the rotor is rather decisive.

  • DC Brushless Motor:

A DC brushless motor is almost the same as the DC brushed motor; the only difference is that it lacks brushes which makes it more efficient as due to the lack of brushes, no speed is lost. They can achieve high performance in small space; therefore, they are better than DC brushed motors. In this motor, an embedded controller is used instead of a commutator to facilitate the operations.

  • Direct Drive Motor:

A direct drive motor is a synchronous motor that drives the load directly and is highly efficient in its work. They have replaced the servo motors due to the implementation of low-wear technology in them. They can accelerate quickly and are very easy to maintain compared to other electric motors.

  • Linear Motor:

A linear motion has an unrolled stator and motor that produce linear force along the length of the device. They have a flat active session with two ends and are faster and accurate compared to rotatory motors.

  • Servo Motor:

A servo motor is coupled with the feedback sensor for facilitating the positioning, and therefore it is considered to be the mainstay of robotics. It can use both rotary and linear actuators and offer a very high performance.

  • Stepper Motor:

A stepper motor is an internal motor with external magnets, and its rotor teeth align with the magnetic field as its windings energize. Any electric motor maker might make its rotor with a permanent magnet while some other manufacturer might use soft metal for making the rotor; any of the two things would work. Therefore, they can move from point to point in fixed growths.