According to their different principles,China motor universal can be divided into synchronous motors and asynchronous motors. There is a strict correspondence between the rotation speed of synchronous motors and the frequency of AC power supply, and the rotation speed is strictly kept constant during operation.The speed of an asynchronous motor varies slightly with the load.
According to the number of ac power phase required, AC motors can be divided into single-phase and three-phase categories. At present, the most widely used three-phase asynchronous motors are three-phase asynchronous motors. This is because the three-phase asynchronous motors have the advantages of simple structure, low price, durability and easy to use and maintenance.In the absence of three-phase power supply and some small power motor is widely used single-phase asynchronous motor.
"Ac motor ": is used to achieve mechanical energy and ac electrical energy conversion machine.Due to the great development of AC power system, AC motor has become the most commonly used motor.Compared with DC motor, ac motor has no commutator (see the commutator of DC motor), so it is simple in structure, convenient in manufacture and relatively firm. It is easy to make the motor with high speed, high voltage, large current and large capacity.Ac motor power ranges from a few watts to hundreds of thousands of kilowatts, or even millions of kilowatts.In the early 1980s, the largest turbogenerator reached 1.5 million kilowatts.The AC motor was invented by Serbian-american scientist Nikola Tesla.
