| Application: | Industrial |
|---|---|
| Speed: | High Speed |
| Number of Stator: | Three-Phase |
| Function: | Control |
| Casing Protection: | Closed Type |
| Number of Poles: | 2 |
| Customization: |
|---|
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Audited Supplier Definition: The motor that converts the alternating current into mechanical power by using an electromagnetic induction phenomenon is called an AC motor. This motor is driven by an alternating current. The stator and the rotor are the two most important parts of the AC motors. The stator is the stationary part of the motor, and the rotor is the rotating part of the motor. The AC motor may be single phase or three phase.
The three phase AC motors are mostly applied in the industry for bulk power conversion from electrical to mechanical. For small power conversion, the single phase AC motors are mostly used.The single phase AC motor is nearly small in size, and it provides a variety of services in the home, office, business concerns, factories, etc. Almost all the domestic appliances such as refrigerators, fans, washing machine, hair dryers, mixers, etc., use single phase AC motor.
The AC motor is mainly classified into two types. They are the synchronous motor and the induction motor.
The motor that converts the AC electrical power into mechanical power and is operated only at the synchronous speed is known as a synchronous motor.
When supply is given to synchronous motor, a revolving field is set up. This field tries to drag the rotor with it, but could not do so because of rotor inertia. Hence, no starting torque is produced. Thus, inherently synchronous motor is not a self-starting the motor.
The machine which converts the AC electric power into mechanical power by using an electromagnetic induction phenomenon in called an induction motor. The induction motor is mainly classified into two types., i.e., the single phase induction motor and the three phase induction motors.
| BASIS OF DIFFERENCE | SYNCHRONOUS MOTOR | INDUCTION MOTOR |
|---|---|---|
| Type of Excitation | A synchronous motor is a doubly excited machine. | An induction motor is a single excited machine. |
| Supply System | Its armature winding is energized from an AC source and its field winding from a DC source. | Its stator winding is energized from an AC source. |
| Speed | It always runs at synchronous speed. The speed is independent of load. | If the load increased the speed of the induction motor decreases. It is always less than the synchronous speed. |
| Starting | It is not self starting. It has to be run up to synchronous speed by any means before it can be synchronized to AC supply. | Induction motor has self starting torque. |
| Operation | A synchronous motor can be operated with lagging and leading power by changing its excitation. | An induction motor operates only at a lagging power factor. At high loads the power factor becomes very poor. |
| Usage | It can be used for power factor correction in addition to supplying torque to drive mechanical loads. | An induction motor is used for driving mechanical loads only. |
| Efficiency | It is more efficient than an induction motor of the same output and voltage rating. | Its efficiency is lesser than that of the synchronous motor of the same output and the voltage rating. |
| Cost | A synchronous motor is costlier than an induction motor of the same output and voltage rating | An induction motor is cheaper than the synchronous motor of the same output and voltage rating. |
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