Variable Frequency AC Motor

This AC motor is a kind of variable-frequency adjustable speed ACVariable frequency adjustable speed motor can solve the problem of fatigue and accelerated aging of mechanical structure and insulation structure caused by frequent starting and braking of motor, and can also effectively reduce the instantaneous voltage of motor during starting. motor, referred to as variable-frequency motor, which adopts electromagnetic design, reduces the resistance of stator and rotor, adapts to frequent speed change under different working conditions, and saves energy to a certain extent. At present, it has become the mainstream speed control scheme, which can be widely used in all walks of life.

Difference Between Variable Frequency AC Motor and Common Motor

1. Different Cooling Systems

Common motor cooling fan and fan movement with the same line, and the two inverter motor is separate. Therefore, when the frequency conversion of ordinary fan is too low, it may be burned due to overheating.

2. Different Insulation Levels

The insulation grade of variable frequency motor is higher than that of ordinary motor because of bearing high frequency magnetic field. The slot insulation of variable frequency motor is strengthened to improve the level of bearing high frequency voltage.

3. Different Electromagnetic Loads

The working point of ordinary motor is basically at the inflection point of magnetic saturation. If it is used as frequency converter, it is easy to be saturated and produce higher exciting current. However, the design of frequency converter motor increases the electromagnetic load and makes the magnetic circuit not easy to be saturated.

4. Different Mechanical Strength

The frequency conversion motor can adjust speed at will within its speed range, and the motor will not be damaged. The ordinary motor can reduce or increase the frequency, but the range should not be too large, otherwise the motor will heat or even burn out.