Re: [CAD_CAM_EDM_DRO] loking for help with power supply for rutex drives...

With 70v AC, you would need a higher voltage cap to be safe, 70 x 1.414
= 98.98. I'd go at least the next step up, say, 125v, 150v would be
better.

Good suggestions about the filter and high ripple caps too.

Regards,
JJ

On Thursday, December 11, 2003, at 01:59 PM, Dave Fisher wrote:

> We use the Rutex drives - Power supply can be very simple - just a
> straight
> isolation transformer with an AC voltage output of say 70 Volts.
> Couple this to a
> full wave silicon bridge rectifier and electrolytic capacitor rated at
> 8.000 to 10,000uf at
> 100 Volt working voltage. This should do the trick - Loads of circuits
> on the web for a
> simple supply - email me if you dont have any luck and I will draw one
> for you.
>
> Couple of other comments, you may want to include a mains filter on
> the input
> side of the transformer - this would protect against any short spikes
> etc on the mains.
>
> Use good quality caps with a high ripple current ripple rateing
>
> You may get away with a single mains transformer to drive all 3 amps -
> as long as you
> allow for a good current rateing, which should probably be rated at 20
> Amps.
>
> Good luck
>
> Dave Fisher
>
>
> The current rateing.
> I not really need to be the doubt would
> ----- Original Message -----
> From: "keith" <jasonkth@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Thursday, December 11, 2003 7:39 AM
> Subject: [CAD_CAM_EDM_DRO] loking for help with power supply for rutex
> drives...
>
>
>> i want to build or buy a power supply for rutex drives. i want to
>> use three of them to power three 3/4 hp micro 100 dc brush servo
>> motors on my old knee mill.
>>
>> i'm not sure which drive are best fitted to my motors, but i'm
>> leaning towards the R90H (200V/40A). there are two other sizes
>> available that i can use if i can find the right power supply for
>> them. R990H2 (200V/10A) or R990H (100V/20A)
>>
>> if i'm to build one,i need help to select the appropriate components,
>> as i am a machinist, and not an engineer. can anyone reccomend which
>> components i would need and where to find them? what va rating for
>> the transformer? what type of rectifier? what kind of capacitor or
>> filter? any schematics for this?
>>
>> or can anyone possibly reccomend where i can buy a power supply?...
>> just got the motors, can't wait to get this up and running!
>>
>> my motor info is as follows:
>> Nema 42 Face mount with 5/8" output shaft
>>> 120 Volt Nominal Terminal Voltage Rating
>>> Torque constant: 5.75 Lb-In/Amp
>>> Cont Torque Rating: 34 Lb-In
>>> Peak Torque: 150 Lb-In
>>> Weight: 14 lbs
>>> It is rated for up to 120 Volts, 5.8 amps.
>>> The motor's back-emf constant is 68.6 Volts/kRPM...so,
>>> The motor will run 15 RPM for every volt you give it.
>>> For example, on a 48 volt supply, you could expect 700 RPM for a no-
>> load
>>
>> micro 100 reliance electric
>> model no e723
>> serial no g000046
>> date code 2597
>> revision b
>> part no 0723-03-049 A
>> ccustomer part no 3/4 H.P. PWM
>>
>> encoder #s heds-5605 A06 0333 A
>>
>> regards,
>> keith
>>
>>
>>
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> Addresses:
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>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach
> it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be
> a sister site to the CCED group, as many of the same members are
> there, for OT subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING
> THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>