Stepper motor driver.

[geggi1]

Hi i got some 400W stepper motors from a V-sat disc.
I'm looking for a schematics for a homebrew driver to run the stepper.
Motor data.
4 poles
48V
11A
8 wires to the motor.

[ocset]

You could look up bipolar stepper motor driver.

[mawyatt]

That's a hefty motor with 11a at 48V!!

Pololu has various drivers and controllers for stepper motors which might be of help.

Best,

[rstofer]

AutomationDirect.com has a 10A 80V driver for about $260 but the voltage is too low.  Read on...

You probably want to run any stepper at  a much higher voltage to overcome the stepping rate limitations caused by the winding inductance.  The current rise time limits the steps/second - substantially!

According to the article, you might want to run the motor at 10x to 24x nameplate voltage or somewhere around 480V to 1152V.  At these voltages, winding insulation quality will be a huge issue.

http://www.e-jpc.com/blog/?p=111

If you don't need RPMs, maybe you can get by with something more conventional - like 80V.

What happened to the original driver?

[geggi1]

It is some stuff i got of a Vsat antenna maintenance kit.
I would like to build my own drivers to make a antenna rotator.

[wizard69]

I'm going to throw in the name Gecko here but I'm not sure they have 11 amp capable drivers.

As for a DIY solution a search of the net might turn up something but to be honest I'd go to TI or one of the other chip manufactures that have devices that can drive external power transistors.   Doing a DIY is non trivial but a driver chip may eliminate a good deal of the complexity.  Here is one example: https://www.ti.com/document-viewer/DRV8711/datasheet/features-slvsc407873#SLVSC407873

To get even passable performance out of such a stepper you really need to go beyond the simple control modes and leverage the various micro stepping and current control schemes.

[geggi1]

I was looking for building my own driver, not buying something from the store.

[wizard69]

I was looking for building my own driver, not buying something from the store.

I guess it depends upon what you mean by building your own driver.   The TI chip mentioned about requires significant design effort to get the complete system to work.    Your alternative is to come up with a FPGA solution.