induction motor power factor and effect of frequency
induction motor power factor and effect of frequency
(OP)
i want to know the effect of frequency on power factor of an induction motor?
if i have a pump driven by 1 kw induction motor,50 hz,and the motor is supplied from an inverter,could i reach 100 hz without any proplem?
if i have a pump driven by 1 kw induction motor,50 hz,and the motor is supplied from an inverter,could i reach 100 hz without any proplem?





RE: induction motor power factor and effect of frequency
RE: induction motor power factor and effect of frequency
Gordon R. Slemon, "Magnetoelectric Devices Transducers, Transformers, and Machines," John Wiley and Sons, Inc., 1966, Figure 5.21 on page 376 can be used to express PF=arctan[(Xe+XLr')/(Re+Rr'/s)], in per units,
Where
s is slip. It can be assumed approximately constant
Reactance Xe~Fs
(Xe is linked to Thevenin's theorem simplification of the equivalent circuit covering the stator impedance and magnetizing branch)
Re is similarly derived as Xe
Rr' is the rotor resistance transferred to the stator side
XLr'~Fs
(XLr' is rotor inductive reactance transferred to the stator side)
Hence, PF will be increasing with increasing frequency
RE: induction motor power factor and effect of frequency
RE: induction motor power factor and effect of frequency