Ordinary asynchronous motors are designed for constant frequency and constant voltage, which are not suitable for variable frequency speed control. Special variable frequency motors have special cooling devices and high insulation materials.
1. Motor design characteristics
Ordinary asynchronous motors are designed for constant frequency and constant voltage, which is not suitable for frequency conversion and speed control.
2. Technical characteristics of inverters
The dedicated variable frequency motor has a dedicated cooling device and high insulation materials.
3. Efficiency loss problem
The frequency converter generates harmonic voltage, which reduces efficiency.
4. Insulation strength challenge
The switching frequency converter's impact voltage increases the insulation burden.