Classification of Asynchronous Motors

According to voltage level classification, asynchronous motors can be divided into low-voltage motors and high-voltage motors. A three-phase asynchronous motor with a rated voltage of 660V or less is called a low-voltage motor; A three-phase asynchronous motor with a rated voltage of 3kV or above is called a high-voltage motor. According to the classification of rotor structure, asynchronous motors are further divided into wound asynchronous motors and squirrel cage asynchronous motors. Wound asynchronous motor: Its stator and rotor have three-phase symmetrical windings.

During the starting process of the motor, a variable resistor can be connected to the rotor circuit to maintain the starting current at about twice the rated current and the maximum starting torque, thus ensuring good starting performance of the motor. Mainly used in mechanical equipment such as winches that require frequent starting and frequent changes in rotation direction (forward and reverse). Squirrel cage asynchronous motor: Its rotor winding is welded with guide bars and end rings, and its form is similar to a cage for catching mice. This type of motor is named after it, abbreviated as a cage motor. Due to its simple structure, low price, high operating efficiency, and good working characteristics, cage motors can meet the requirements of most industrial and agricultural production machinery, making them widely used. The water pumps produced by our Kaiquan company are equipped with squirrel cage asynchronous motors. The following mainly introduces the squirrel cage asynchronous motor.