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 [DPRG] Capacitor calculation Message index sorted by: [ date ] [ thread ] [ subject ] [ author ] Previous message: [DPRG] Capacitor calculation Next message: [DPRG] Capacitor calculation Subject: [DPRG] Capacitor calculation From: R. Bickle rbickle at swbell.net Date: Thu Jul 26 11:33:18 CDT 2001 ```Sir, Sounds like you are driving the motor from a full-wave rectified supply. What you want to do here is decide how much ripple voltage you can tolerate at the output. Then you can calculate your capacitance by: V(ripple) = I(load) / 2fC so C = I(load) / 2f * V(ripple) A motor will not really care much about a clean supply though. To get low ripple at 10 amps, you are going to need a tremendous amount of capacitance. Rick Bickle -----Original Message----- >From: dprglist-admin at dprg.org [mailto:dprglist-admin at dprg.org]On Behalf Of robotics Sent: Thursday, July 26, 2001 10:19 AM To: DPRGlist at dprg.org Subject: [DPRG] Capacitor calculation Can any one tell me how to select a capacitor value wih respect to the current required by the motor? Let us assume that the 12V robot motor needs 10A current for proper movement and I use full wave rectifier for 12V AC source and capacitor filter to power it. What should be the optimum capacitor value? I used a 10000 uFcap but it did not work, so it must be very high value that I needed. What is it? I decided to charge a battery and power the motor and it works well. Why it did not work for the cap but worked with the battery? Battery has 7Ahr rating. SHYAM SHUNDAR TIWARI SENSORS TECHNOLOGY (P) LTD. AM-51, DEEN DAYAL NAGAR GWALIOR, MP 474040, INDIA FAX: 0091-751-545716 http://sensorstechnology.tripod.com/ http://robotics_club_india.tripod.com/ _______________________________________________ DPRGlist mailing list DPRGlist at dprg.org http://nimon.ncc.com/mailman/listinfo/dprglist ``` Previous message: [DPRG] Capacitor calculation Next message: [DPRG] Capacitor calculation Message index sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the DPRG mailing list