Structure of industrial induction heating capacitors
Industrial Induction heating capacitor
Flair Induction heating capacitor is specially designed for heavy-current, medium/high frequency industrial induction heating and melting application in metal working industry. We have been working on the capacitor performance of high-efficiency energy storage and strong heat dissipation capacity for induction heating & melting furnaces. In foundries and metal processing facilities, the flair-made Power Capacitor (water-cooled/air-cooled capacitor) support the induction melting of various metals, with robust construction that withstand thermal and mechanical stress, high temperature working condition, and flexible for various induction heating power systems.
By placing applicable induction heating capacitor banks(Tank Capacitor/DC filtering capacitor) would contribute to reduce energy consumption and operational costs for metal smelters.
The induction heating capacitor mainly consist of capacitor core(winded by film&foil), shell, cooling-setup,dielectric, electrode etc. It is engineered for medium/high frequency industrial induction heating condition.
Engineering Structure of induction heating capacitors
⭐ Capacitor cell / element (capacitor component groups)
It is stacked by multiple capacitor elements, the capacitor elements are winded by low-loss BOPP film and aluminum foil. The common electrode of capacitor element mostly welding with cooing water pipes, so that achieved the integration of electric connection and heat dissipation.
⭐ Dielectric and Electrodes
Electric dielectric: All-film structure, non-PCB insulation oil impregnated, featured high dielectric strength and good high-frequency characteristics；
Electrode: high-purity aluminum foil，featured good electrical conductivity and is suitable for high-frequency and high-current withstand ability.
⭐ Internal bus bars/connections
By adopting heavy-duty copper bus-bars/plates to connect capacitor elements in parallel or series for handling thousands of amperes of high-frequency current, as well as achieve higher power/capacity or satisfy sever working condition.
⭐ Impregnating Fluid
Non-PCB Biodegradable insulating oil: The internal assembly is dried under a deep vacuum and filled with a high-grade, non-PCB insulating oil to eliminate air pockets and prevent internal arcing.
⭐ Capacitor Shell
To reduce eddy current heating, the capacitor shell usually made in rectangular box shape with material of aluminum alloy or copper. The box cover is equipped with insulated porcelain/compound sleeves to support the terminals and water pipes. The water pipes is connecting to the cooling system.
⭐ Cooling system setup:
Built-in water-pipes, connecting to electrode directly. By circulating cooling water to achieve heat dissipation efficiently, so as to keep continuous high-frequency operations; For air-cooled setup capacitor, no need water-pipes.
⭐ Terminal connection and lead-out structure
Wiring Terminals: Mostly adopted porcelain copper screw, lead-out along with insulated porcelain sleeves, to assure the high-voltage safety.
Grounding method: Connect to the common pole through a ground stud or ground plate.
Wiring connection: If the grouped outgoing terminals are used in parallel, a flexible connection piece with a cross-sectional area ≧2.5 square centimeters should be adopted.
⭐ Safety Protection Setup
Pressure switch, shut down the power supply if internal gases expand due to fault.