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Unread 16-09-2010, 12:14
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Mark McLeod Mark McLeod is offline
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Re: Denso Window Motors, Warning - Don't use with Jaguars !

It's 800 rpm on the CIM.
This is a kinetic energy kicker from this year. It's geared to be capable of 5000 rpm, but we restrict it and normal operating speed is about 1600rpm from the far zone.
The magnetic fields collapse quickly when it kicks, but we didn't measure a dangerous pulse back into the Jag. Power to the CIM is stopped when it kicks.
The CIM didn't heat up more than slightly warm to the touch.
A combination of the back EMF and spinning up the flywheel is obviously stressful enough on the Jag to warm it up over time and put it close to the over-current. It didn't have any trouble maintaining speed, just on the ramp up.
I am surprised that over current was reached at half speed after a lot of stressful speed changes.
The fault point gradually dropped in testing as time and stress went on.

We had it playing golf at an SBPLI fundraising outing on Tuesday and it was operating from 300 rpm to 450 rpm without noticeable issues. It can repeatedly putt a golfball back into the box it came out of at 40 feet.


The 2009 flywheel for turning you're thinking of was one of our local teams (263 Sachem), and was powered by a victor that overheated and burst into flames before they redesigned the code to ramp up and not try to go full bore all the time. That flywheel was 22 lbs and they were spinning it a bit faster.
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Last edited by Mark McLeod : 16-09-2010 at 14:31.