In single-phase asynchronous motors, which one is better, resistance starter or capacitor starter motor?

Release time:

Feb 21,2023

In our daily work and life, single-phase asynchronous motors are relatively common. According to the characteristics of motor start-up and operation, single-phase asynchronous motors include resistor start, capacitor start, capacitor run, capacitor start and run, and their cover pole and other basic types.

The single-phase asynchronous motor is powered by a single-phase AC power supply. There is a set of single-phase working winding resistance on the motor stator. The magnetic potential caused by the single-phase winding resistance is a positive and negative pulse vibration magnetic potential, which cannot cause starting torque; There is also a set of auxiliary winding resistance on the motor stator, or corresponding countermeasures are taken on the magnetic circuit structure, so that the motor has the ability to start independently.

Single phase resistor starts asynchronous motor

The stator of the motor has a main winding and a secondary winding. Their axes are separated by a TV angle of 90 ° in space. The secondary winding with a generally large resistance value is connected to the main winding through the starter switch and connected to the power supply together. After the motor is started, when the speed is close to the synchronous speed, the starter switch is turned on, the secondary winding is disconnected from the power supply, and the main winding works independently. The characteristics of this type of motor are simple structure, low cost, and stable operation, but the starting current is large, which can reach more than 5 times the rated voltage, and the maximum will be 9-10 times; the starting torque, load capacity and rated force energy indicators of the motor are average. Therefore, the power range of this type of motor is generally tens to hundreds of watts, and it is suitable for small machine tools, fans and massagers with no special requirements for starting torque.

Single-phase capacitor starts asynchronous motor

The structure of the motor is the same as that of the resistance-starting type, but there is a large-volume starting capacitor connected in series in the secondary winding circuit. In addition to the advantages of the resistance-starting motor, the motor has the characteristics of significantly expanding the starting torque and small starting current. However, due to the high price of large space capacitors, the power range of capacitor-starting motors is generally several hundred watts, which is suitable for high starting torque or full starting places, such as small air compressors, refrigerators and mills.

Due to various reasons during operation, there will be failures. The common faults of motors are mainly divided into mechanical and electrical aspects. 　　(1)机械方面有扫膛、振动、轴过热、损坏等故障。异步电动机定、转子之间气隙很小，容易导致定、转子之间相碰。一般由于端盖轴室内孔磨损或端盖止口与机座止口磨损变形，使机座、端盖、转子三者不同轴引起扫膛。

YS series three-phase asynchronous motor manufacturers share motors with you. What are the classifications as follows?

YS series three-phase asynchronous motor manufacturers share motors with you, which are classified as follows: The motor is widely used and has a wide variety. We generally refer to the classification of the motor to distinguish the motor for buying and selling. The motor is classified in detail as follows: