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Dc Soft Start Help, circuit anyone ? |
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 Jul 28 2009, 10:14 PM
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#1
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 Group: Members Posts: 1 Joined: 28-July 09 Member No.: 6,020  |
Hi desperately
 looking for a simple soft start circuit , 12 volt around 10 to 15 amps around 1/2 ...to... 1 second to full speed (building a tug for heavy loads needs to take out the jolt )....maybe using a power mosfet (with protection) and the ne555 ? or would a simple r/c with a power mosfet circuit do , any help would be much appreciated .... Peter
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Aug 1 2009, 09:29 PM
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#2
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Posting Freak Group: Moderator Posts: 2,383 Joined: 24-April 02 From: Christchurch, New Zealand Member No.: 1 |
Hello Peter
If you are only looking for a start time of around a second, I would suggest a series resistance that is bridged out by a contact. - the resistance could be made up of a length of wire as the time is short and the total dissipation will be low. If you were wanting an extended start time, a solid state circuit would be of value by reducing the power dissipation. If you did use a solid state (MOSFET) circuit, you would robably still short it out to reduce the power dissipation. Best regards, Mark. -------------------- Mark Empson administrator
Skype Contact = markempson | phone +64 274 363 067 LMPForum | LMP Tech Warehouse | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | LMP Software | Mark Empson Website |
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