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Old 02-17-2019, 04:02 PM   #1
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Default Dc Motor Question

Hi All,

A quick question.

Is this a mistake or is my math wrong?

My workings are as followed

(746*100)/500= 149.2A
149.2*.78=116.38A

If it is wrong, can someone show me the proper working out?

Kind regards,

Chris
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Old 02-17-2019, 04:11 PM   #2
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British homework ?

Yuuk.

BTW, your equations lack units of measure. ( Watts, Volts, Joules, HP, etc. )

You'd be failed over here just on that basis alone.
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Old 02-17-2019, 04:14 PM   #3
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All homework sucks! Lets not single out British
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Old 02-17-2019, 04:18 PM   #4
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Use table D2 in appendix D for the FLA

And the current rating stays the same reguardless of its efficiency.

The question asks for its rating, not what the current will be due to its efficiency.
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Last edited by eddy current; 02-17-2019 at 04:22 PM.
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