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Resonant Capacitor Banks for Induction Heating Furnaces - Energy-Efficient Solutions from China Suppliers and Factory
Here we are introducing one of our special power capacitor banks which used in medium-frequency induction heating furnace. By choosing suitable capacitor banks for your induction heating system may saving up 38% energy and improving induction heating performance up 22%.
Up to 38%
Energy Saving
Up to 22%
Performance Improvement
So to be a crucial components in medium-frequency induction heating furnace, what is the core function of capacitor banks?
- 1. Resonant circuit formation: It will connect with the induction coil to create resonance, maximizing current amplitude in the coil for intense magnetic fields and effectively heating.
- 2. Reactive power compensation: Provide with reactive power to support the inductive coil and whole induction heating power system, so as to improve overall power factor and tune circuit.
What type of induction heating capacitor banks do you need?
There are solid medium, liquid medium for options, air-cooled, water-cooled for options;
- Higher frequency & Higher Voltage level (500Hz ~ 300kHz): Applicable for liquid medium with internal water-cooling heat dissipation design.
- Lower frequency & Lower voltage (50Hz ~ 300Hz): Applicable for solid/liquid medium with air-cooling design.
But it is not absolute design capacitor in this way. We have many design with frequency up to 10khz water-cooled capacitors, and 5khz air-cooled capacitors as well. The induction heating capacitor bank design mostly depends on the medium-frequency design and structure, such as frequency 500hz~300khz, voltage level, IGBT based or thyristor-based MF power supplies, cooling method, series or parallel resonance circuit, work-piece properties. The work-piece properties will affect a lot for whole induction heating system design.
Here is reference about recommended frequency ranges:
Resonant Capacitors’ Role in Different MF Furnace Types
- 1 Parallel Resonant Circuits: The capacitor bank is connected in parallel with the induction coil, common in traditional thyristor-based MF power supplies.
- 2 Series Resonant Circuits: The capacitor bank is connected in series with the load, a more modern, efficient design that allows for higher power factors and easier control.
Required data for customizing a resonant capacitor bank
Voltage level (AC or DC)?
Rating Current?
Frequency?
Output Power / Capacitance (kVar/microfarad)?
Quality Guarantee
- 1) Individual Test Certificate: Each unit must come with a test report of withstand voltage and actual capacitance/voltage/current measurement, leak test etc.
- 2) Connection Compatibility: Specify the terminal threads and the cooling water inlet/outlet threads.
- 3) Capacitor manufactured according to: IEC 60110-1 (specific to induction furnace capacitors).
- 4) Dielectric: Polypropylene film (PCB-free), All-film structure, good for harsh working environment.
- 5) Case Material: Aluminum alloy (Non-Magnetic).
- 6) Losses (W/kvar): Lowest possible value (e.g., < 0.5 W/kvar).
- 7) Third-Party Inspection: Available upon request.
Frequently Asked Questions (FAQ)
How can choosing the right capacitor bank improve my induction heating system?
By selecting a suitable capacitor bank tailored to your specific medium-frequency induction heating furnace, you can save up to 38% in energy consumption and improve the overall heating performance by up to 22%.
What are the main functions of capacitor banks in induction furnaces?
Capacitor banks serve two core functions: first, they form a resonant circuit with the induction coil to maximize current amplitude for efficient heating; second, they provide reactive power compensation to improve the overall power factor of the system.
When should I choose a water-cooled capacitor bank over an air-cooled one?
Generally, higher frequency and higher voltage levels (500Hz to 300kHz) require liquid medium capacitors with internal water-cooling designs. Lower frequency and lower voltage levels (50Hz to 300Hz) typically use solid/liquid medium capacitors with air-cooling designs, though custom setups may vary.
What data do I need to provide to customize a resonant capacitor bank?
To customize a capacitor bank, you need to provide the voltage level (AC or DC), rating current, operating frequency, and output power or capacitance values (kVar/microfarad).
What manufacturing and quality standards do your capacitor banks meet?
Our capacitors are manufactured according to the IEC 60110-1 standard specifically for induction furnace applications. They feature low power losses (< 0.5 W/kvar), PCB-free polypropylene dielectric film, non-magnetic aluminum alloy cases, and come with individual test certificates.