How to maintain a relatively stable output power when the super-audio annealing machine heat-treats the workpiece?

During the induction heating process of the super audio annealing machine, the workpiece loses magnetism after the curie point due to temperature rise, the load changes, and the heating power will drop. Aiming at the problem of output power drop, we propose the following methods to solve it.

(1) The measure taken for the machine generator is to add capacitance during the heating process. Generally, this method is applied to large workpieces with long heating time, such as large gears, flywheel ring gears, etc. The method is to add additional capacitors and corresponding contactors with arc extinguishing covers on the quenching machine tool. When the workpiece is heated to the magnetic transition point, the current and power of the generator are both reduced, and the pointer turns in the inductive direction. At this time, add the matched capacitance, and the current and power of the generator will increase by a certain value. This method is called the method of adding capacitance.

(2) The measure taken for the super audio annealing machine is to change the load inductance during the heating process. The method is to increase an auxiliary inductance. When heating starts, the auxiliary inductance and the inductor are connected in series; after reaching the curie point, the copper shunt controlled by the helical coil is inserted into the originally broken bus bar, the auxiliary inductance is short-circuited, the load matching state is changed, and the output power can increase. Before the auxiliary inductance is short-circuited, the heater should be disconnected first.