General purpose motors have been around for many years. They are the workhorse of almost every industry. An inverter-duty motor is a much newer concept that became necessary as motors began to be driven by VFDs (inverters or AC drives).
The speed regulating systems connected frequency converter and YVFE3 series variable frequency speed-regulating three-phase asynchronous motor, compared with other speed regulating systems, have the advantages of significant energy saving effect, good speed regulating performance, wide speed range, low noise, low vibration easy equipment with various inverters at home and abroad, which are commonly used in fans, pumps, compressors and heating equipment.