Need a 36v or 72v 3 phase motor controller

[fitek]

I need a decent motor controller for some tinkering; I'll be tearing it apart. It shouldn't be a POS but at the same time, I don't want to cry because I've killed a $150 motor controller.

I got a couple of BMSBattery controllers three or four years back that are OK but shipping was SLOOOOOW... like two months... I don't want to wait that long.

Not sure if they are still in use, but I've already ripped apart two XC846 based controllers so getting one of these would be ideal. But not a big deal if I have to figure out the pinouts of another chip.

Three cheap DC motor controllers would also work. I really ONLY need the H-bridges out of these things.

Any suggestions?

 

[NeilP]

I've got a sensorless 12 FET Xlyte controller...5 volt reg is iffy...I some tiem remember firing it up with an external 5volt supply..then it runs.

Also a Lyen 6FET sensored that needs looking at...it runs but only at low speed then starts juddering. I may one day get around to fixing them...but postage to you in SF from Jersey maybea bit pricey. But I was considering sending the 6 FETback to Lyen for him to look at.

 

[fitek]

Neil, what's the Xlyte one worth to you? Replacing the regulator(s) is not a problem.

 

[NeilP]

I actually have it open now.

Started looking at it today, but got called in to work.

Umm..not even looked what they cost new...this is an APM type..not a CA one. yes you could wire for a CA, but seem to remember that programming is not possible..the APM does sort of 'on the fly programming. APM is connected to the Tx/Rx pins and does current and speed limiting via those pins.

I made up a lead to examine the data stream, both Tx and Rx, but never did any analysing of the streams.

I have three of these now. and don't really need them all but now not sure what to do and if it is worth selling them. Need to see what the issues are first.

They are from Electric Rider,
umm

is $50 reasonable plus
postage or is that too high or too low? I have nto looked it up ..and am rushing out now...so let me knwoi what sort of figure is reasonable and what you had in mind.

I'll get back to looking at it tomorrow and see what gives with the reg side.

 

[dnmun]

i did not realize that controllers used an H-bridge. i thought that was for stepper motors.

 

[NeilP]

H- bridge ? What is that? Not sure what you mean. Not a term I have come across before

 

[dnmun]

it drives forward and backward motion equally:

http://en.wikipedia.org/wiki/H_bridge

 

[NeilP]

I have just gone back up to the first post, and re read. I was wondering why you suddenly mentioned H-bridges, when we had been discussing sale of 12 FET sensor less ... Totally lost me as to where mention of H bridge came from.

That's the troubled browsing the forum on an iPhone, you don easily get overview of previous posts.

 

[NeilP]

Sorry, looks like you are out of luck.

I had hoped to get the one with the 5 volt problem working, so I had two APM compatible working units and you could have the third.


But the 5 volt issue, can't solve it.

The LM317 is working as is the ummm...err...shit..cant remember the part number A 78 ??... swapped the two parts over from the working unit to the duff one..and the duff still has no 5volt. The working unit has a 4.65 volt output in to the A78?? from a circuit of SMD's...and that lot is too small for me to be able to work on .


So you are welcome to it if you want

 

[fitek]

For the record, an an H-bridge is just a way to switch power on and off. Nothing about forward or backward. You use two transistors, one for connecting your load to high voltage and another for connecting to ground. There's a lot of little circuitry that needs to be in place for various reasons and they are, IMO, a headache to build. So easier to cut the logic level traces on an existing controller and connect to those than to build your own.

All the larger DC motor controllers I have seen use H-bridges.

 

[dnmun]

whatever you say. but like i said, i have never seen a controller with an H-bridge. maybe you have one to show us.

 

[NeilP]

I don't care about H-bridges..

I still have these two controllers sitting here..you will need to sort the 5 volt on one (sensor less 12 fet) and sort unknown stuttering problem not he 6 get.

I am only keeping them to harvest the FET's off of them, so you can have them for the cost of the FET's plus postage