New series induction melting furnace design, new process and new components are adopted to reduce output and improve output efficiency. Compared with the standard parallel induction melting furnace , the energy-saving effect of using a high-efficiency series induction melting furnace is very obvious. Generally, the power saving effect can be increased by an average of 14% .

Efficient series induction melting furnace has been listed 1 year, but user demand has been very strong performance, the current series of highly efficient induction melting furnace market share is very low, less than 10% , but if the analysis from the other side, Chinese energy-efficient tandem induction The market demand potential of the melting furnace is huge.

 China's small and medium tonnage induction melting furnace industry policy at the national level is mainly to promote energy saving and high efficiency series induction melting furnace . Compared with ordinary series induction melting furnaces , the energy-saving and high-efficiency series induction melting furnaces have an average loss reduction of 20% and an efficiency improvement of 14% . Ultra-high efficiency series induction melting furnaces have an average efficiency increase of 2% over energy-saving and high-efficiency series induction melting furnaces . The energy saving of the series induction melting furnace system has a huge impact on the national policy of implementing the energy saving and consumption reduction strategy. .

The 1- ton series induction melting furnace is a technology of series inverter thyristor intermediate frequency power supply, and the inverter resonance circuit is series resonance. Adopting thyristor full-control rectifier circuit, intermediate frequency electric furnace adopts series resonance voltage feedback control method. The output power is controlled by adjusting the inverter trigger frequency, without adjusting the conduction angle of rectifier thyristor. Power, so that the rectifier thyristor is always fully open, so the power factor is always greater than 0.95 , the harmonic content is small, the rectifier output voltage is constant, and the waveform is good. Therefore, the equipment has high operating efficiency and can save 10 to 20% of electrical energy. The energy saving effect is obvious. Can fully meet the national GB / T14549-93 power standard requirements. The rectifier is powered by a 12- pulse SCR intermediate frequency power supply, which does not contain the 5th and 7th harmonic components. According to the harmonic analysis, the harmonic impact of the 12- pulse rectifier power supply is much smaller than that of a 6- pulse ordinary KGPS intermediate frequency power supply. The control system is fully digitized, and the startup success rate reaches 100%. 

Technical parameters and equipment configuration of 1 ton series intermediate frequency melting furnace in progressive line

Induction melting furnace working mode :

One set of furnace body is smelted and the other set is used

1. Rectifier transformer (optional)

Rectifier transformer is used to reduce the primary high-voltage power to the input voltage suitable for intermediate frequency power supply. It uses a special high-impedance oil-immersed self-cooling rectifier transformer. S11 type high-performance three-phase oil-immersed distribution transformer 630KVA

    This rectifier transformer generally adopts the Y / d11 , Y0 connection group mode. The secondary output is two sets, one of which is a Y -type connection, and the other output is a d11 -type connection, so that the phase of the two sets of outputs will The difference of 30 ° from each other forms a 12- pulse rectification method. Compared with the six-pulse rectification, this rectification method can effectively suppress the 5th and 7th harmonics and reduce the interference of harmonic components on the power grid. Therefore, this rectifier transformer is used in large electric furnaces.

Parameters of 12- pulse rectifier power transformer: 

Note: There should be no-load voltage regulating switch on the high voltage side of the transformer. The voltage can be adjusted in five steps: -10 %, -5 %, 0 , + 5 %, + 10 %. 2 single 1- ton series induction melting furnace water cooling equipment: (optional)

According to your own situation, you can also purchase or build your own cooling pool to eliminate the HRBL-60T closed circulation cooling tower.

A pool can be built at the production site, and the induction melting furnace can be cooled by water circulation through a pump . A complete set of combined cooling equipment can also be selected. It is recommended to use HRBL-50 or THRBL-60T closed circulation cooling tower, which can save a lot of production area. The circulating water cooling parameters are as follows: