The difference between ordinary motor and variable frequency motor design
1, electromagnetic design
For ordinary asynchronous motors, the main performance parameters considered in the redesign are overload capability, starting performance, efficiency, and power factor. The variable frequency motor, because the critical slip ratio is inversely proportional to the power supply frequency, can be directly started when the critical slip rate is close to 1. Therefore, the overload capability and the starting performance do not need to be considered too much, and the key problem to be solved is how to improve the motor pair. The ability to adapt to non-sinusoidal power supplies.
2, structural design
In the structural design, it is also necessary to consider the influence of non-sinusoidal power supply characteristics on the insulation structure, vibration and noise cooling mode of the variable frequency motor.
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