Re: [CAD_CAM_EDM_DRO] Re: 3 phase motor math

Hi Ken,

Oh, it was Rab who wanted it! Sorry I mangled the reply. the line
frequency limitation is good to know. I wondered if the meter had
limitations.

However, the stepper can work at a 20 KHz chop frequency, so I'm
guessing the losses wouldn't be that bad? That's why I desired to check
a "KNOWN" stepper's inductance.

I just looked up my Sanyo Denki 180 Oz/In steppers:

http://sanyo-denki-online.com/nema23.htm
233-180-DU 180 3A. 2.75V 0.9 Ohm, 2.2 Mh

The L/C meter read 2.22 Mh (with a little bobble). This would be
correct! As you say, Meter is not for 50/60 Hz motors or xfmrs.

Alan KM6VV


bull2002winkle wrote:

> Alan
> Thanks for the link. I have all the equipment I need, I was trying to
> help Rab. Looking at the specs is says it won't work with line
> frequency devices since the lowest measuring frequency is 20Khz.
> Ken
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Marconett <KM6VV@a...> wrote:
>
>>Hi Ken,
>>
>>You might check out the L/C Meter from "Almost All Digital Electronics".
>>
>> http://www.aade.com
>>
>>It's not expensive. I have one for RF work. I don't know why it
>>wouldn't work with a motor inductance. If I can find a motor with
>
> known
>
>>inductance, I'll check it out!
>>
>>Alan KM6VV
>>