# How do I calculate my stepper motor power supply?

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## How do you calculate the voltage of a stepper motor?

If voltage increases, so does current, but if resistance increases, current reduces.

1. V = iR. Because most high-performance stepper motors have low phase resistance, the driver does not need much power supply voltage to hold the motor in position. …
2. T = JA. …
3. V = KEώ + iR + L(di/dt)

## How much power does a stepper motor use?

A typical stepper motor like our NEMA 17 might have a rated voltage of 2.8 Volts and a maximum current of 1.68 Amps. This basically means if you hook it up to 2.8 Volts it will draw 1.68 Amps. If you try to run it at a higher voltage it will draw more current and get excessively hot.

## Do I need a power supply for each stepper motor?

Q: How to choose a power supply for my stepper motors? A: When using a stepper motor, you’ll need a power supply to give power to stepper motor. A right power supply can make your stepper motor working at optimum performance, Instead, a wrong power supply might cause low performance or larger waste of energy.

## How do you match a stepper motor to a driver?

Consider voltage and current needs.

A simple way to choose a stepper drive is to look for four things — voltage, current, microstepping, and maximum step pulse rate. Ensure that the drive can handle a wide range of current so that you can test the system at different voltage levels to fit your application.

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