  This paper proposes a computer-based recursion algorithm for automatic charge
of power device of electric vehicles carrying electromagnet. The charging
system includes charging cable with one end connecting gang socket,
electromagnetic gear driving the connecting socket and a charging pile breaking
or closing, and detecting part for detecting electric vehicle static call or
start state. The gang socket mentioned above is linked to electromagnetic gear,
and the detecting part is connected with charging management system containing
the intelligent charging power module which controls the electromagnetic drive
action to close socket with a charging pile at static state and to break at
start state. Our work holds an electric automobile with convenience, safety low
maintenance cost.
