The invention discloses a control method of an arc-free breaking
alternating current circuit, which belongs to the technical field of
power control, and comprises the following steps: a power supply step: converting an
input control voltage into a coil working
voltage of an electromagnetic actuating mechanism, and supplying power to an
energy storage circuit at the same time; an input
voltage detection step: detecting an input voltage value in the power supply step, and comparing an
input control voltage value with a set value; in the closing step, the
control circuit outputs a forward pulse to the coil in a delayed mode, and the electromagnetic executing mechanism switches on the main loop at the next
zero crossing point; in the disconnection step, the electromagnetic executing mechanism disconnects the main loop at the next
zero crossing point; the problem that electric arcs are generated in the on-off switching process of the alternating-
current load is solved, high efficiency and
energy conservation are achieved, the time of closing and opening the circuit of the electromagnetic executing mechanism is controlled in a time-
delay mode through
software, time-
delay on-off control is conducted on the contact in a time-sharing mode so that a real current
zero crossing point can be found, and the problem of electric
corrosion of the contact in the load switching process is effectively solved.