The difference between a variable frequency motor and an ordinary AC motor
Ordinary fan cooling fan, follow the machine movement with the same line, and inverter fan, the two are separate. Therefore, when the fan is too low, it may burn out due to overheating.
Due to the variable frequency motor under high frequency magnetic field, so the insulation level than ordinary motor, the principle is not ordinary motor with inverter driven, but in practice, in order to save money on many occasions with the need to speed motor to replace the ordinary motor, but ordinary motor speed accuracy is not high, energy transformation in the wind the pump in the often do. When the frequency converter motor is replaced by a common motor, the carrier frequency of the converter is as low as possible, so as to reduce the insulation damage of the high-frequency motor.
Variable frequency motor in the speed range of speed can be arbitrary, and the motor will not be damaged, the most general domestic general motors can only run on AC380V/50HZ under the condition of ordinary motor can reduce the frequency or frequency range, but can not be too large, otherwise the motor will heat and even burn.
