[alexandemma]

dpm wrote:Doesn’t anyone else use the same controller?
I’d say tho that you’re unlikely to get good step control out of a 3-ph machine, especially one that was designed for continuous/ hight speed operation.

David

There are no useful markings on the chip, but my guess is that it could be texas instruments. It could be totally custom built.

1000rpm with 14 pulses per rev, a 12MHz DSP could have a cup of tea between each pulse. I think the controller could even micro step it.

Somebody out there must know how to reprogram it

Alex

[alexandemma]

Re: Fisher Paykel smartdrive motor controller

spin sequences by breaking it; so you’re looking at figuring out the switching circuit on the board to allow direct motor control.

Beyond that, I suspect that we can’t really help you – although I would be fascinated to know how you get on.

Good luck,
Penguin45.

Thanks
Effectively the motor is a three phase (permanent magnet) motor powered by a variable frequency inverter that is controlled by a pre programed micro computer (or dsp) with feedback from hall sensors tweaking the pulse width modulation.
That is all fairly simple, however F&P are paranoid about industrial espionage and the actual specs and pinouts of the controller chip is not available.
With the right info it should be posible to up load any step and direction info into the dsp’s flash memory and use the motor to run any cnc type machine.
Get my drift?
Alex

[alexandemma]

alexa wrote:Silicon Chip magazine should be able to assist you based on they have in their Dec04 to Mar05 publications used a F&P motor as a Wind turbine and welcome enquiries of this nature.

Have already used them as wind and hydro generators, TIP put a bridge rectifier on each pole and then combine them in series or paralle to match the working speed!

What I want is to use the power and control circuitry to control the motor in other environments

Alex

[Author]

Posts