The smoothing reactor of the induction melting furnace plays an important role in the circuit, which can be summarized as follows:
1. Freewheeling to ensure reliable operation of the inverter.
2. Smooth wave makes the DC current obtained by the rectifier circuit relatively smooth.
3. Electrical isolation It is connected to isolate the rectifier and inverter circuits.
4. Limit the di/dt value of the rising rate of the circuit current, and protect the thyristor when the inverter fails.
1) According to the principle of continuous minimum load current
2) According to the principle of limiting current pulsation
