Hot spot keywords in induction melting furnace

The first keyword: 12- pulse double rectification

In order to reduce the harmonic interference generated by the intermediate frequency power supply to the power grid, the induction melting furnace adopts a 12- pulse thyristor bridge rectifier circuit. The transformer used for the rectifier circuit adopts the △ / △, Y wiring form, and the transformer has two sets of three-phase output twice. The voltages of the two sets of outputs are equal, both are 660V , but the phase difference is 30 °.

The second keyword: double rectifier parallel

That is to say, the two sets of rectification are in parallel relationship, and the parallel input line power supply voltage 660v-950v realizes the output of 0 to 1 350 V continuously adjustable DC voltage.

The third keyword: double rectifier series

The 6- phase 12- pulse full-control bridge rectifier circuit is mainly to rectify 50Hz AC to DC. The 12 thyristors consisting of 12 -pulse full-controlled rectifier circuit in series, the input power frequency voltage (380V- 66 0V) , the control thyristor is turned on, to achieve the output 0 ~ 1150V DC voltage is continuously adjustable.

The fourth keyword: series induction melting furnace

Because the general-purpose parallel induction melting furnace can not meet the energy-saving requirements, and the appearance of high-performance series induction melting furnace , the power factor is greater than 0.95 , the harmonic content is small, and the rectified output voltage