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Inductor / Motor coil Voltage and Current correlation

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Nikiss

Electrical
Joined
Apr 5, 2020
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H Bridge is used to drive one motor coil as that ensures that motor is not moving, no Bemf and everything is static. I use a large nema 34 stepper motor for testing because it can take a lot of power. Voltage is measured on the two ends of coil wires.
Now what I'm interested in is this: Does 2x increase of Voltage equals 2x Increase of current through motor coil? My motor specification says this : 0.65 Ohm coil resistance and 5.8 mH phase inductance if this helps at all.
 
Bridge is switched at 10 Khz and duty cycle is varied until a specific voltage is achieved. Didn't mention this, my bad.
I noticed that voltage on dc motor coils varies with position of the rotor when the same duty cycle is applied. That's why stepper was used as static test.
So this was more of a inductor in series with resistor only test.
 
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