Dear Musharaf, >From: Musharraf Hanif <[EMAIL PROTECTED]> > 2. Any hints as to how I should implement a break mechanism? I was thinking of powering up the transistors corresponding to the lookup table for rotating in the other direction. I think that this would have the same effect as reversing the voltage on a brushed permanent magnet DC motor. Will there be some problem with this?
The easiest way to slow down a motor is to send a DC current through the windings (0 Hz rotating field). When you want to try to rotate it in another direction you wil get LARGE currents. As you are breaking, you will have energy that you must absorb with a resistor, or deliver back into the mains supply. The DC current makes the motor absorb the energy, makes it a lot simpler. What you can use depends a bit on what you want to control, how defined you want to stop etc. Regards, Pieter Hoeben ______________________________________________ Hoeben Electronics Phone: +31 6 51590081 Ronkert 44 Fax: +31 13 5096025 5094 EW Lage Mierde Private: +31 13 5096200 The Netherlands E-mail: [EMAIL PROTECTED] http://www.hoeben.com ______________________________________________ -- Author: Pieter Hoeben INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
