Re: How many poles in typical ac servo drive?

(DaveB) wrote:

>On Sun, 20 Nov 2005 03:06:37 -0500, clutch@xxxxxxxxx wrote:
>
>>I was wondering about this.
>>
>>Since many ac servo drives are 3ph, how many poles do they tend to
>>have. Would more poles make it easier to hold a position? Of course
>>that would come at the expense of having to run higher freqs for
>>speed.
>>
>>Wes S
>>--
>>The Constitution wasn't perfect but it sure beats
>>what we have now.
>
>
>Good explanation of ac servo's
>
>http://tinyurl.com/7dsba
>
>Regards
>
>Daveb

Good link.

I had a thought, if a motor using permanent magnets slowly lost it's
magnetic strength would currents go up? Is this even a reasonable
thought.

I noticed that this mill runs 80% of rated load just holding up Z.
There isn't a counterbalance in this machine.

Wes S

--
The Constitution wasn't perfect but it sure beats
what we have now.
.

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