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Unread 01-09-2010, 08:35
Russ Beavis Russ Beavis is offline
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Re: Speed Controller Design

A brief technical sidetrack - for an interesting demonstration of "brake" versus "coast", take the two leads for the motor and short them together. Now try spinning the motor shaft. Now you'll understand why turning on either both of the low side or both of the high side drivers result in "brake".

After you've shown yourself and others how to "brake" a DC brush motor, now try to explain why this happens. This is a great introductory lesson to electromagnetism.

Russ