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I am a ME student but, I'm trying to teach myself EE. I am testing out a stepper motor. Here are the specs for the motor:

Rated Voltage: 5.7V

Rated Current: 1A per Phase

Resistance per Phase: 5.7V

I am using 15 VDC and want to make sure I don't blow the motor. Using Ohm's Law, V_{Input}= R * I_{Motor}, I get 15 = 1(I) which gives me a resistance of 15 ohms.

My Questions:

(1) What is rated voltage? Is that the optimal voltage for the stepper motor?

(2) What happens if I go above the rated voltage?

(3) If I use a 15 Ohm resistor, will this be enough so the motor doesn't blow?

I am clearly missing something here. Any help would be appreciated.

Thanks in Advance.

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# Stepper Motor Resistance

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