1. What is a 3-phase asynchronous motor?

A 3-phase asynchronous motor is an electric motor that is powered by a 3-phase power supply. It consists of a fixed outer part (stator) and a rotating inner part (rotor). When AC power passes through the stator coil, it generates a magnetic field in the rotor. Due to the existence of the rotor resistance, the magnetic field does not rotate, but induces a current in the rotor. This current generates a magnetic field in the rotor, which interacts with the magnetic field in the stator, causing the rotor to rotate.

2. Torque characteristics of 3-phase asynchronous motors

The torque of a 3-phase asynchronous motor is one of its most important properties. Torque is the torque output by the motor, which determines the driving ability of the motor. The torque of a 3-phase asynchronous motor is generated by the interaction of the magnetic fields between the stator and the rotor.

3. Rotor current and torque of a 3-phase asynchronous motor

The rotor current is a key parameter of a 3-phase asynchronous motor. When current flows through the rotor, a magnetic field is generated in the rotor, which interacts with the magnetic field in the stator to generate torque. The magnitude and direction of the rotor current depends on factors such as rotor resistance, power supply voltage and rotor inductance.

4. Rotor resistance and torque of 3-phase asynchronous motor

Rotor resistance is another key parameter that affects the torque of 3-phase asynchronous motor. The larger the rotor resistance, the smaller the rotor current and the smaller the torque. The smaller the rotor resistance, the larger the rotor current and the larger the torque. Therefore, there is a close relationship between rotor resistance and the torque characteristics of the motor.

5. Torque output characteristics of 3-phase asynchronous motor

The torque output characteristic of 3-phase asynchronous motor is an important parameter of the motor. It describes the torque output of the motor under different loads. Usually, the torque output characteristic of the motor is nonlinear, which means that the torque output of the motor is different under different loads.

6. Summary

The torque of 3-phase asynchronous motor is an important performance parameter of the motor. Rotor current and rotor resistance are two key parameters that affect the torque of 3-phase asynchronous motor. The torque output characteristics of 3-phase asynchronous motor under different loads are nonlinear. Understanding these parameters and characteristics can help us better understand the performance and application of 3-phase asynchronous motors.

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