Hello all,
Quick question. If motor name plate says 1400 RPM @50 Hz and VFD speed is set to 20Hz does that mean the motor shaft is rotating at 560RPM?
Is the calculation below correct to determine the shaft speed of the motor as commanded by the VFD?
Name Plate RPM 1400/50Hz = 28RPMS per 1Hz
VFD SPEED 20Hz * 28 = 560RPM
Or is there some other variable involved with the calculation assuming there is no load on the shaft.
Cheers.
Quick question. If motor name plate says 1400 RPM @50 Hz and VFD speed is set to 20Hz does that mean the motor shaft is rotating at 560RPM?
Is the calculation below correct to determine the shaft speed of the motor as commanded by the VFD?
Name Plate RPM 1400/50Hz = 28RPMS per 1Hz
VFD SPEED 20Hz * 28 = 560RPM
Or is there some other variable involved with the calculation assuming there is no load on the shaft.
Cheers.