Electromagnet control circuit

The principle of using SSR to control and drive AC electromagnets is shown in the figure. Close the switch SW1, and the 220V AC is transformed into 30V AC through the transformer T
, which is rectified by the QL barrier; capacitor C. , G filter, integrated circuit IC7824 voltage stabilization, output +24V supplied to the electromagnet control circuit , and the power
indicator LED1 (red) lights up. This circuit is used for loading electromagnetic cranes used in iron smelting plants and foundries (can lift 0.5t of pig iron at a time). Move
the electric hoist to move the electromagnetic hoist to the raw material (iron) position and lower it to the pig iron pile. Close the switch SW2, the solid state relay SSR1 terminal receives positive power
and is turned on, the SSR pins ③ and ④ are turned on, and the electromagnet DT is energized to attract iron. The electric hoist lifts the electromagnet .
    The heated iron raw materials are sent to the iron melting furnace, the switch SW2 is turned off, the pig iron falls into the furnace, and there is a signal light LED2 (green) to indicate when it is working. There is also
an alarm bell DL sound to instruct people to pay attention to safety.