AC motor brake


Posted on Aug 13, 2012

A shot of direct current will instantly stop any ac power tool motor. Switch Si is a center-off, one side spring return. With Si on, ac will be fed to the motor and the motor will run. To brake the motor, simply press Si down and a quick shot of dc will instantly stop it. The switch returns to the center off position when released


AC motor brake
Click here to download the full size of the above Circuit.

This Power Brake can only be used with ac motors; it will not brake universal (ac-dc) motors. A heat sink must be provided for the diode.




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