More current to stepper motor

[rj23]

Hi all,

Bit of an odd one.
I have an aftermarket car ecu that has a 4 wire stepper motor attached to it.
Unfortunately, the ecu is current limiting to 1 amp.

The motor needs 1.85 amps (6.5 ohm motor, 12volts).

It therefore needs a bigger current supply (no position feedback needed).

Is anything available (make or otherwise) where the 4 inputs can be connected, and the higher current can be output?

thanks

Rod

 

[Bluejets]

Show a schematic of your installation.

 

[rj23]

 

[rj23]

 

[Bluejets]

Block diagrams do not help much.

If you can gain access to the step direction signals ( which I doubt) then you could use just about any driver.
Why you need to drive at a higher current is a mystery though.

 

[rj23]

The motor and the ECU are from different automotive applications. The rated supply of the ecu is insufficient to drive the motor in the other assembly.

 

[Alec_t]

You could use the ecu to control power MOSFETs to switch the stepper motor. The devil will be in the details.

 

[rj23]

I like your thinking.

 

[rj23]

https://www.petervis.com/dictionary...mosfet/stepper-motor-driver-using-mosfet.html

 

[rj23]

https://www.ebay.com.au/itm/1-PC-Mo...rand=Unbranded&_trksid=p2047675.c100005.m1851

 

[01sporty]

US seller:
https://www.ebay.com/itm/L298N-Moto...147680&hash=item2c93c1935c:g:W8AAAOSwg3FUl-z3

 

[bertus]

Hello,

@01sporty , The L298 is not going to work.
It can deliver 2 A per channel, but total device current is 4 A.

Bertus

 

[Minder]

You also require some means of ensuring the winding current is a constant 1.85amps at all speeds.
M..