Consider a DC motor driven by a DC supply. When supply voltage is suddenly reduced back emf becomes momentarily more than the supply voltage, which should drive a current in the circuit opposing the polarity of the supply. Will this damage the DC supply due to wrong polarity?
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07-10-2013, 04:08 AM #1Junior Member
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Is DC supply to a motor damaged if voltage is suddenly reduced?
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07-11-2013, 09:07 AM #2Senior Member
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it depends on the supply circuit. but its good practice to include a "flyback diode" to take the reverse current.
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