AC Induction and three phase power

Thread Starter

zebra1707

Joined Nov 9, 2010
2
Hi there

I have asked to explore the advantage of a three-phase power supply in an induction motor. How do these obtain 415 V inputs?

Breaking it down further to:

* Explaining how a three-phase motor achieves maximum torque three times
in the cycle of its rotor.


* Explaining (briefly) how this leads to higher power than is possible
for a single phase motor with a voltage supply of 240V.

Some guidance would be greatly appreciated.

Cheers
 

kokkie_d

Joined Jan 12, 2009
72
Hi ,

I am not entirly sure on the question your asking:

I have asked to explore the advantage of a three-phase power supply in an induction motor. How do these obtain 415 V inputs?
3 phase of 240 volt add them together taking in account the shift of 120 degrees per phase.

Breaking it down further to:

* Explaining how a three-phase motor achieves maximum torque three times
in the cycle of its rotor.
The stator generates a torque based on magnitude and frequency of the suppleid voltage. The voltage generates and magetic field which induces a magnetic field in the rotor which will try to align with the field in the stator. The combined phases of the voltage generate 1 torque.
* Explaining (briefly) how this leads to higher power than is possible
for a single phase motor with a voltage supply of 240V.
The higher power is possible due to efficiency of the motor.
 

Thread Starter

zebra1707

Joined Nov 9, 2010
2
Thank you for the reply. My apologies for the late post. I think that I have posted this question in the wrong area of the forum.

You have helped me greatly.

Cheers
 
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