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sandipmurchite2006
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Join Date: Jul 2011
Posts: 2

Protection Method for Induction Motor Due to Faults

07/15/2011 3:23 AM

hello friends

I am PG student . I am interested to do the project in protection method for induction motor due to faults..I wanted to know the what are the recent faults occurs in induction motor .....so that i am capable to do work to implement the protection method using PIC controller.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#1

Re: protection method for induction motor due to faults

07/15/2011 3:46 AM
  • Overload
  • Overtemperature
  • Bearing moisture ingress
  • Phase loss

Lots more might be available should a variable voltage/frequency drive unit be in use.

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JRaef
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United States - Member - New Member Engineering Fields - Power Engineering - New Member

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Location: California, USA, where the Godless live next door to God.
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#2

Re: Protection Method for Induction Motor Due to Faults

07/15/2011 9:36 AM

Add shorted winding and shorted lead.

But I suppose a shorted winding means your protection has already failed...

To do the overload protection right, your PIC controller should be capable of calculating and maintaining a thermal model of the motor based at least on the current flow into it and using knowledge of how that affects it thermally. This also has to be retentive so that if you power down the motor, when it is immediately powered up again the protection does not reset and think that the motor is once again cold.

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sandipmurchite2006
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Join Date: Jul 2011
Posts: 2
#3
In reply to #2

Re: Protection Method for Induction Motor Due to Faults

07/16/2011 12:05 AM

Sir your suggestion is correct.....but we are going to take the samples for the period of the 1 sec in PIC by ADC and we take average of that value and then compared with the reference value..........

Suppose after 1 sec again power up is take place the average value is going to increase which cause the switch off the supply.
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