VFD electric motors can solve the problems of ordinary asynchronous motor efficiency, temperature rise, insulation strength, noise, vibration and cooling, as well as fatigue and accelerated aging caused by frequent starting and braking to the mechanical structure and insulation structure. A VFD electric motor can also effectively reduce the instantaneous voltage of the motor when it is started.
A VFD compatible motor can be steplessly variable speed. Stepless speed regulation means there is no gear and it is gradually becoming faster or slower from stopping to the fastest speed, or from the fastest speed to stopping. In addition, the full DC variable frequency motor can control the motor speed and actual demand by dividing the motor speed gear into many gears through the inverter, while the AC brush motor only has 3-speed adjustments at most, which cannot achieve the effect of frequency conversion.
When the electrical transmission equipment is running, the carrier frequency is about several thousand to ten thousand Hz, which makes the stator winding of the motor withstand a high rate of voltage rise, which is equivalent to applying a steep impulse voltage to the motor, making the insulation between the turns of the motor withstand more severe tests. But the variable frequency motor can work under the voltage of the rectifier and filter, its performance is more stable, and the service life is longer.