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Pre-Charge circuit of DC motor controller

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Published on Dec 21, 2010

Microcontroller charges capacitors through a pre-charge relay and resistor before engaging main contactor. This prevents high "in-rush current" to the capacitors and prevents arcing in the main contactor. The microcontroller used is a C8051 from Scilabs. It is being programmed in C language with the Kiel compiler. The IGBTs used are Fuji 2MBI 300l-060. The two capacitors total 5300uf.

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