Question

A 5hp,400v,4-pole,50 hz induction motor having 36 slots in the stator and 40 slotsin the rotor may crawl synchronously at

Answer 1

Given :

Number of poles = 4

Frequency = 50 Hz

Voltage = 400V

Power = 5Hp

To find :

Synchronous speed = ?

Solution :

• We know ,Synchronous speed = 120×frequency / Number of poles

                                                   =120f / N

                                                   =120×50 / 4  = 1500 rpm

The synchronous speed is 1500 rpm