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tom255
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Join Date: Aug 2006
Location: Estonia, Tallinn
02.25.2009, 04:33 AM

Quote:
Originally Posted by JERRY2KONE View Post
AFAIK, a single mechanism (the motor) can't function as a generator and a source of power at the same time. You must use power to brake the car. I'm not an electrical engineer, but I know a few things about physics and the forces that are present and being applied in this scenario simply can't be ignored.

During my 20 years in the Navy I have seen on a couple of occasions where I generator which normally puts out huge amounts of power was turned into a motor when the electrical power flow was reversed accidently. Due to the circuitry involved within the system it was not supposed to happen, but it did.

There is no way that electrical braking is accomplished without using some source of power. That's just a relitive impossibility. But as you stated Patric can probably explain this so we can all understand it.
Why you cant brake without power, ofcourse you can by just shorting windings on motor or put some capacitance (capacitors) to windings thats it, maybe its not so effective. Maybe you cant change brake force without power source, somehow you just need change chorting impulse lengt and opposite phase switching, that basicaly any ESC do.

I will speak with guy who made a tests on ESC to check Ezrun 150A, does energy recuperation braking works there?

Last edited by tom255; 02.25.2009 at 05:20 AM.
   
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