0102030405
Medium Frequency Capacitors for Inductive Heating Circuits - China Suppliers & Factory Specializing in Design
General introduction
The induction heating&melting capacitor is specially designed for induction heating furnace. It generates current inside the conductor through a high-frequency electric field to achieve rapid heating effect. This capacitor has an efficient energy conversion rate and enable to convert the input electrical energy into heat energy very fast, thus achieving rapid heating/melting of the metals.
| Dielectric material | PP film |
| Insulation liquid | biodegradable,non-PCB |
| Maximum allowable voltage | Rated voltage×1.05 (12 hours/day) |
| Maximum allowable current | Rated current×1.15 |
| Tanδ | Less than 0.1%(1W/Kvar) |
| Ambient air temperature | -20~40℃ for natural cooling or force ventilated; -20~50℃ for water cooling |
| Inlet Cooling water temperature | lower than 30℃ |
| Outlet cooling water temperature | lower than 45℃ |
| Installation | Indoor, please advise if you want to install horizontally, special design requires for Horizontal position. |
| Case | Aluminum case |
Working principle
The working principle of the induction heating/melting capacitor is based on the principles of electromagnetic induction and capacitor energy storage. When the high-frequency AC power supply is connected to the capacitor, the high-frequency electric field will be generated inside the capacitor. This high-frequency electric field generates an induced current on the surface of the metals being heated. We call this vortex as well, the vortex/currents convert electrical energy into thermal energy, thus enabling rapid heating happens in the whole induction furnace system.
The capacitor design structure
Considering the various factors, such as capacity, working voltage, frequency, current etc. The capacitor consist of electrode, capacitor core and insulation materials, cooling water tubes.
Electrode
It connects to the power system, so the current will pass through smoothly.
Insulation Materials
It guarantees the capacitor safety, preventing the capacitor from electric leakage or breakdown.
Cooling Water Tubes
The cooling water helps to control and regulate the capacitor temperature.
The application superiority of the induction heating capacitors
- ✓ 1. Fast heating rate: Achieve fast heating rate through the induced current being generated by high-frequency electric field.
- ✓ 2. High energy efficient: Convert most of electric energy to heat energy, resulting in less energy loss.
- ✓ 3. Reliable: Apply for mature insulation and heat dissipation technology, the equipment is capable of working continuously for a long time.
- ✓ Environmental protection: No need for fuel, no exhaust gas generated during the production.
- ✓ 4. Reasonable design: Reasonable design and selection can optimize the matching of water-cooled capacitors and medium-frequency furnaces, further improving energy conversion and utilization efficiency.
- ✓ 5. Extend equipment life: The water cooling design makes the whole system achieve good heat dissipation, maintaining a safe environment for metal metallurgy.
Future prospect
In order to obtain higher energy conversion efficiency and improve the electric energy efficiency, a high input and output power factor is required. With the development and the application of power electronics, resonant inverters in the induction power supply circuit through the power device to achieve soft switching, the induction heating power system will trend toward large capacity and higher power. These technologies need to be further solved.
The development trend of induction heating technology includes:
- ➔ More high-power, large-capacity, and high-frequency capabilities.
- ➔ Low power consumption and high power factor.
- ➔ Intelligent and digital control systems.
- ➔ Heating technology with no oxidation.
Factory operation procedure
1. capacitor cases
1. cooing water tubes-1
1. cooling water tubes-2
2. winding capacitor core-1
2. winding capacitor core-2
2. winding capacitor core-3
3. soldering and assembly
3. solering core
4. Test of intermediates
5. sealing the case
6. Vacuum oil filling process-1
6. Vacuum oil filling process-2
6. Vacuum oil filling process-3
7. leak test
8. Ex-factory test
9. packing and delivery
Frequently Asked Questions
Q1: What is the main function of an induction heating and melting capacitor?
A1: It is specially designed for induction heating furnaces. It generates internal currents in conductors via a high-frequency electric field, converting input electrical energy into heat energy rapidly to melt or heat metals.
Q2: What materials are used in the construction of these capacitors?
A2: The dielectric material is PP film, the insulation liquid is biodegradable and non-PCB, and the casing is made of high-quality aluminum.
Q3: Can these capacitors be installed horizontally?
A3: The standard installation is indoor and vertical. However, if horizontal installation is required, please advise in advance as it requires a special structural design.
Q4: What are the cooling water temperature limits for water-cooled capacitors?
A4: The inlet cooling water temperature should be lower than 30℃, and the outlet cooling water temperature must remain lower than 45℃ to ensure proper heat dissipation.
Q5: What are the main benefits of using water-cooled designs in induction systems?
A5: Water cooling design ensures efficient heat dissipation, maintains a safe operating environment for metal metallurgy, and significantly extends the service life of the equipment.
Q6: What is the future development trend of induction heating technology?
A6: The technology is moving towards larger capacity, higher frequency, lower power consumption, higher power factor, digital/intelligent control, and oxidation-free heating.