Re: Curtis controller model numbers

[Rod Hower <rodhower@ameritech.net>]

STD-386?  Sounds like a sexually transmitted disease!
Do you have a way to save it to PDF?
If not I might be able to send you a "trial" version
of Acrobat.
If it's saved to PDF we can post it on Jon Sheer's
EV control website for everyone to view.
Thanks,
Rod

Rich Rudman wrote:

> Rod Hower wrote:
> 
>>Hey Rich, if you do have a schematic, send it my way.
>>I can look at Orcad and powerlogic (ie. power-illogic).
>>File size is not a concern.
>>
>>Thanks,
>>Rod
>>
>>Otmar wrote:
>>
>>
>>>James Massey wrote:
>>>
>>>
>>>>Hi all
>>>>
>>>>We have in for repair a couple of Curtis 1209B-7204 controllers, rated as
>>>>72-120V, 275A.
>>>>
>>>>Q1) Do Curtis rate controllers on motor amps, battery amps, or both
>>>>the same?
>>>>
>>>
>>>Motor amps, which never exceeds battery amps.
>>>
>>>
>>>>Q2) Does anyone have data on what this controller is supposed to do?
>>>>
>>>
>>>PWM the output to control a series motor. The rest is safety and
>>>protection.
>>>
>>>
>>>>the
>>>>customer has an OEM connection drawing, showing the 4 power terminals, a
>>>>2-wire pot and a control wire on the 3rd terminal - but it fails to show
>>>>where the other end of this control goes to! we suspect it is switched B+
>>>>w.r.t. B-, but can someone help?
>>>>
>>>
>>>Control wire is called KSI and it goes to B+ to turn the controller on.
>>>
>>>
>>>>Q3) Those of you who have had Curtis failiures, what failed and do you
>>>>know
>>>>why?
>>>>
>>>
>>>#1) Water in the unit
>>>#2) freewheel diodes overheat, short and blow the fets. The current
>>>limit has no control below 10% duty cycle on the "B" models and
>>>therefore can not maintain safe currents with a low resistance motor and
>>>high voltage pack at stall. This makes the diodes overheat.
>>>
>>>
>>>>As an aid to repair we are drawing up the circuit.
>>>>
>>>
>>>I did that 10 years ago on a 1221B. (wow! has it been that long!) Later
>>>Rich Rudman cleaned and corrected what I scribbled. I believe the
>>>control board of the 1209 is very similar if not identical to the 1221.
>>>
>>>Rich, have you got an electronic copy handy? A gif would be great, but
>>>if you have the OrCad file I think I could get someone to distill it
>>>into pdf.
>>>
>>>-Otmar-
>>>http://www.evcl.com/914  My electric 914
>>>
>>>http://www.CafeElectric.com
>>>Mailto:otlists@evcl.com
>>>
>>>
>>>
> Otmar sent it back to me, and I have restored it to my 200. It's in
> STD-386 format, with a Library file.
> 
> Can you handle that?
> 
> Rich Rudman
> Manzanita Micro
> 
> 
>