Products

The dc filter capacitor designed for high-power series resonant induction heating system. DC water-cooling capacitors are fuctional in three-phase power supply of 380VAC, 575VAC and 660VAC (internaly connected in series).

High power capacitor made for induction heating equipment and melting furnaces.

Water-cooled capacitor are in high demand, particularly for induction heating plants where the frequency of the current supply is above 50 cycles/second, the adoption of water-cooled capacitors will save cost for capacitor bank for power factor correction and reduce the occupy space.  

Compare with conventional melting furnace, the inductive melting technology make the melting work easier than ever, it’s popular used in forging, tempering and melting of metals. The benefits include high efficiency, fast heating speed, controllable heating temperature and melting quality, pleasant working enviroment, guranteed occupational safety,enviroment friendly etc. And the inductive melting achieves higher smelting quality in terms of controllable operation. The Induction technoloy is suitable for bulk casting production in grey iron foundries since it can handle high output and large capacities.

Water cooled induction heating capacitors

Application
Compensating capacitor used in intermediate frequency furnace for increase the power of the induction furnace. 

The popular immediate frequency heating/melting furnace generally related to induction coil and resonant capacitors.The fabrication form the induction heating magnetic field.  It mainly used for heating, melting,annealing, high-frequency welding etc. The induction heating/melting is well-know method for heating electrically conductive metals. The process convert the power energy into heat energy requires high power efficiency. A parallel capacitors form a resonant circuit employed in the system.

Power Capacitors designed for Induction Melting System usually with cooling design to decrease the generated heat during the operation of the induction power system. 

Self-cooling method: Cooling is obtained by natural air circulation

Forced-ventilation method: Cooling is obtained by ventilators/fans

Water-cooled method: The capacitor will be desigend with built-in cooling water tubes for cooling down the capacitor. 

The dc filtering film capacitor developed for mid-frequency furnace, which employed natural cooling, no need cooling water placed in. The design will save cost on cooling system and maintenance. But the working frequency and over-current can’t be as high as water cooled type capacitor. 
While ironmaking and steel making process by medium-frequency coreless induction melting furnace, voltage sags and swells will be in good control. 

Series Resonant capacitor used in high-power Medium Frequency Induction Furnace for Silicon Melting or steel melting. 
For an efficient solid state power sources for induction furnace, usually have the induction heating load driven at its natural resonant frequency. 
The furnace coil and a capacitor form a resonant tank circuit. The metal to be heated in the coil which resulting in shift in the frequency. The resonant tank circuit is returned via frequency control circuit to achieve resonance and to enable maximum power transfer to the load at all time. 

Technical properties 
1.Water cooled Capacitor standard: GB/T3984.1-2004/IEC60110-1：1998 
2.Insulation shell and non-insulation shell design for options
3.Professional dielectric system design for high efficiency
4.Special cooling system design for good heat dissipation (single water tube, double water tube, four water tubes)
5.Between the capacitor terminals, it could withstand line frequency of 2.0UN or DC 4.0UN for 10seconds; 
6.Between the insulation capacitor shell and terminals, it could withstand power-frequency test voltage 2.15UN, Minimum 2000V, last for 10 Seconds.
7.Capacitance tolerance: -5%～+10%;
8.Under rated power frequency voltage, the dissipation factor tgδ ≤0.0008； 
Cooling Tube sealing test: air pressure 1MPAa, last for 2mins.

The induction heating capacitor is specially designed for power factor correction in the induction heating, melting, stirring, casting, as well as tuning the inductive heating circuit.  The voltage of the intermediate frequency induction heating furnace must be appropriate. If the voltage too high, it will cause the capacitor breakdown due to over voltage. 

We specialized in power capacitor with heavy current electrics and high Kvar which are popular to use in foundries.