APPARATUS FOR AUTOMATIC MODULATION OF REFERENCE FREQUENCY FOR STARTING OF INDUCTION HEATING IN GALVANZING PROCESS

摘要

PURPOSE: An apparatus for automatic modulation of reference frequency for starting of induction heating in galvanzing process is provided to prevent errors of the induction heating equipment by converting automatically the reference frequency according to a temperature value of a strip. CONSTITUTION: An apparatus for automatic modulation of reference frequency for starting of induction heating in galvanzing process includes an automatic reference frequency conversion command unit and an automatic reference frequency setup unit. The automatic reference frequency conversion command unit(110) transmits a reference frequency address to a setup unit(120) when the reference frequency corresponding to particular temperature is set up by a PLC(90). The automatic reference frequency conversion command unit is formed with an operating mode selection switch and a reference frequency address setup switch. The automatic reference frequency setup unit includes a relay for operating a signal of the automatic reference frequency conversion command unit, a contact point, and a resistor for executing a reference frequency decision command.