The difference between the variable frequency motor and the ordinary motor is as follows:
1. From the perspective of power frequency, the variable frequency motor is a poor quality motor, and the ordinary motor is a good motor;
2. Because the PWM widened wave output of the inverter simulates sinusoidal alternating current, it contains a lot of harmonics, and generally needs to be filtered by the reactor to enter the ordinary motor, otherwise the ordinary motor will generate heat;
3. In order to adapt to the output of the inverter, the PWM wide-wave analog sinusoidal AC contains a large number of harmonics. Specially produced variable frequency motor. Its role can be understood as a reactor plus a normal motor;
4. That is to say, the inverter motor of the same power is larger than the cross section of the common motor core. The number of turns of the coil should be large and the diameter of the wire should be large; the insulation should be high, and the special cooling fan motor;
5. In order to meet the needs of weak magnetic speed regulation, the bearing capacity and high-speed rotor dynamic balance are considered.
6. This kind of variable frequency motor does not have better torque characteristics, but overcomes the need of ordinary motor not adapting to PWM wide-wave analog sinusoidal alternating current;
7. If the inverter motor does not have the above characteristics and requirements, it is a fake inverter motor frequency conversion
If you want to buy a household appliance motor, please pay attention to synchronous motor and oven motor.
