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Derive the hystersis torque expression of the hystersis motor.

Derive the hystersis torque expression of the hystersis motor.

Answers

gregory
Hystersis torque expression of the hystersis motor:
Usually, the shaded pole principle is employed for hystersis motor. The rotor of this
motor is smooth, having high retentively, so that, hystersis loss is high. It has no
winding, the rotor poles magnetically locked up with the revolving stator poles of opposite polarity. However, rotor poles always lag behind stator poles by a small
angle ‘’ and the rotor revolves synchronously.
The mechanical power developed by rotor is given by
Pm = Ph (1-S)/ S
Pm = Mech power developed
Ph = Hysteresis loss in rotor and hysteresis torque
Th = (9.55 Pm )/NS
2pNS TSh /60 = (Eb Ia - losses) = out power
Pm = (Eb Ia - losses)
\ Tsh = Pm /(2pNS /60)
= (60/2p ). (Pm/NS)
= (9.55 Pm / Ns
gregorymasila answered the question on February 22, 2018 at 16:13

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