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Smart Drive motor as a motor 'and' as a generator?

Former Member

Hi

I am working on a project where I want to use a Smart Drive Motor (Found in Fisher and Paykel washing machines, and also in LG and Samsung machines) as a motor, and then as a generator.  The problem I am having is getting the motor to work.  It needs a motor controller, but I haven't found anything in a post or anywhere that provides a list of parts and schematic. I am hoping to have the capabiltiy within the system to switch between a motr and a generator.

Given my level of capability I would really like a start to end project description.

 

Does anyone know of such a description or is anyone able to help me out with building this project?

 

Thanks

 

Simon

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  • 0

    I was thinking of using a four-phase stepper as resolver.  I read an article on this topic years and years ago and cannot find it.  A four-phase step motor sequence uses two signals (bipolar, unipolar is just a winding trick) that are ninety degrees out-of-phase.  The RF community refers to these as quadrature signals.  They use them for detection at much higher rates, which they can because they are not using moving parts.  These are square waves if we are full stepping. They are sinuate if we are micro-stepping. 

     

    The author connected the two coils to a resistor, on the order of the nominal coil resistance, if recall serves.  He also shunted them with back-to-back Zeners to clamp any spikes.  He used a comparator circuit to suss the signum of a step signal if he received one.  This interrupted the processor.  He had an image of the next anticipated step in memory.  If the signal conformed to this, he new he had taken another step, updated his count and image.  If not, he knew a backward step had been taken, decremented his step, and inverted his image of the next step and toggled his direction flag.  If recall serves.  I don't remember how he set up his initial configuration, or if he had to.

  • 0 in reply to D_Hersey

    Thanks Don,

    Is the method you suggested going to be possible with the motor I have already selected?  As mentioned it is too late to change to another motor/generator system as everything is built around the smart drive specs.

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