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Re: Why Hasn't first gone Brushless?
Quote:
Originally Posted by Andrew Y.
Cogging is what your thinking about, and this goes to cost again...low cost motors and controllers tend to have SEVERE cogging issues at low throttle
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That isn't what I was thinking of. Sensorless motor controllers work by measuring zero crossing point of the back EMF. If the motor isn't moving there is no back EMF which means you are essentially driving blind as to what position the motor to the windings.
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If either a public officer or any one else saw a person attempting to cross a bridge which had been ascertained to be unsafe, and there were no time to warn him of his danger, they might seize him and turn him back without any real infringement of his liberty; for liberty consists in doing what one desires, and he does not desire to fall into the river. -Mill
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That inspector needs their hard drive wiped and the common sense upgraded from version dingbat 1.0. - Andy Baker [more] 
18-03-2009, 10:47
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