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Anonymous Poster

HT Motors and LT Power Supplies

09/17/2009 8:21 AM

how much current a HT motor would draw if it supplies from a LT i.e 415v instead of 6.6 kv and what are the effect on the other characteristic of the motor.?
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msamad
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Join Date: Feb 2009
Location: Houston, USA
Posts: 946
Good Answers: 244
#1

Re: running of HT motors on LT supply

09/17/2009 11:24 AM

Motor may not develop enough starting torque to spin. The starting torque developed is proportional to the square of the voltage, so the developed torque will be 1/64th of the regular starting torque in this case. The motor will draw excessive current at stall condition and damage the stator/rotor winding.

What are you actually trying to do?

-MS

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SimpleMind
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Join Date: Sep 2009
Posts: 1056
Good Answers: 88
#2

Re: HT Motors and LT Power Supplies

09/18/2009 6:02 PM

Will start allright with enough torque to spin it's fan but that's about it. Not much usefull torque. No damage to expect even if it stalled for reasonable time. Which it wouldn't unless you had bad bearings

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