Medium Frequency Induction Power Generator
MF-15kW Medium Frequency Induction Power Supply & Heating Generator for Forging, Melting and Heat Treatment
What Is a Medium Frequency Induction Power Generator?
A medium frequency induction power generator is an industrial power conversion system that transforms three-phase AC electricity into controlled medium-frequency electrical energy for electromagnetic induction heating applications, including metal forging, billet heating, localized melting, shrink fitting, and heat treatment.
The HLQ DW-MF-15KW Medium Frequency Induction Power Supply is a 15kW IGBT-based induction heating generator operating at 1–20kHz. It is designed for industrial processes that require relatively deep heat penetration, controlled heating power, and repeatable thermal processing.
Unlike higher-frequency induction heating systems that often concentrate heat closer to the metal surface, medium-frequency induction generators are frequently selected for applications requiring greater electromagnetic penetration and more uniform through-heating of suitable metal components.
The DW-MF-15KW system operates on a three-phase 380V, 50/60Hz electrical supply and features a water-cooled generator and transformer arrangement.
Main Industrial Applications:
- Steel rod induction heating for forging
- Steel bar and billet end heating
- Medium-frequency induction forging
- Small metal induction melting applications
- Steel shaft and gear heat treatment
- Deep induction hardening of suitable components
- Metal shrink fitting and interference fitting
- Stator and rotor assembly heating
- Metal tube-end heating for extrusion
- Mold and die preheating
- Welding preheating of steel components
- Localized industrial metal heating
Key Product Features:
- 15kW rated induction heating power
- 1–20kHz medium-frequency operation
- IGBT inverter technology
- Three-phase 380V industrial power supply
- Water-cooled power generator and transformer
- Continuous-duty design under specified conditions
- Overvoltage and overcurrent protection
- Overtemperature and cooling-water protection
- Customized induction coils for different workpieces
Manufactured by HLQ Induction Equipment Co., Ltd., the DW-MF-15KW is suitable for industrial manufacturers requiring a compact, medium-frequency induction heating power supply for small-scale forging, localized metal heating, and precision heat treatment.
Actual heating capacity, temperature, and production throughput depend on the workpiece material, dimensions, induction coil design, and operating conditions.
Technical Specifications — 15kW Medium Frequency Induction Power Supply
Main Technical Parameters
| Technical Parameter | Specification |
|---|---|
| Product Name | Medium Frequency Induction Power Generator |
| Product Category | Medium Frequency Induction Heating Power Supply |
| Manufacturer | HLQ Induction Equipment Co., Ltd. |
| Brand | HLQ |
| Model Number | DW-MF-15KW |
| Maximum Oscillation Power | 15kW |
| Operating Frequency | 1–20kHz |
| Input Voltage | Three-Phase AC 380V |
| Input Frequency | 50/60Hz |
| Published Maximum Input Current | 23A |
| Power Electronics | IGBT Inverter |
| Inverter Circuit | Parallel Inverter Configuration |
| Heating Principle | Electromagnetic Induction |
| Cooling Method | Water Cooling |
| Required Cooling Water Pressure | >0.2MPa |
| Published Cooling Water Flow | 6L/min |
| Duty Cycle | 100% at 40°C, Under Specified Conditions |
| Generator Dimensions | 560 × 270 × 470mm |
| Transformer Dimensions | 550 × 300 × 420mm |
| Generator Net Weight | Approximately 30kg |
| Transformer Net Weight | Approximately 35kg |
| Cable Length | 2m |
| Induction Coil | Customized According to Application |
| Electrical Protection | Overvoltage, Overcurrent, Phase-Loss Protection |
| Thermal Protection | Overtemperature Protection |
| Cooling Protection | Water Shortage Alarm and Protection |
| Main Applications | Forging, Rod Heating, Small-Scale Melting, Heat Treatment |
| Additional Applications | Shrink Fitting, Tube-End Heating, Mold Preheating |
| Installation | Industrial Workshop / Manufacturing Facility |
| Manufacturer Location | China |
Important Technical Note:
The DW-MF-15KW is a medium-frequency induction heating power generator, not a complete metal melting furnace or forging production line.
An appropriate induction coil, heating station, cooling system, electrical protection devices, and workpiece-handling arrangement may be necessary depending on the application.
The 15kW power rating does not independently determine the maximum workpiece diameter, melting capacity, or heating production rate.
The published input current and cooling requirements should be confirmed against the final equipment configuration.
Recommended Industrial Applications
| Application | Workpiece Materials | Heating Purpose | Engineering Considerations |
|---|---|---|---|
| Induction Forging | Carbon Steel, Alloy Steel | Heating Before Forging | Workpiece Diameter and Heating Time |
| Steel Rod End Heating | Carbon Steel | Localized Hot Forming | Heated Length and Temperature |
| Steel Billet Heating | Steel Billets | Small-Scale Through-Heating | Thermal Mass and Production Rate |
| Induction Melting | Steel, Copper, Aluminum | Small-Batch Metal Melting | Crucible, Frequency and Power Requirements |
| Shaft Induction Hardening | Suitable Hardenable Steel | Surface or Deeper-Layer Hardening | Case Depth and Quenching |
| Gear Induction Heating | Carbon and Alloy Steel | Heat Treatment | Tooth Geometry and Coil Design |
| Shrink Fitting | Steel Hubs, Rotors, Stators | Thermal Expansion for Assembly | Temperature Uniformity |
| Tube-End Heating | Steel and Other Conductive Metals | Extrusion or Forming Preparation | Wall Thickness and Heated Length |
| Mold Preheating | Tool Steel | Controlled Preheating | Mold Mass and Temperature Distribution |
| Welding Preheating | Carbon and Alloy Steel | Preheating Before Welding | Temperature Control and Heat Distribution |
Engineering Recommendation: A 15kW system is best considered for relatively small workpieces or localized heating. Larger billets, high-throughput forging lines, and production-scale melting furnaces generally require higher-power systems.
How Does a Medium Frequency Induction Power Generator Work?
A medium frequency induction power generator converts three-phase industrial AC electricity into controlled medium-frequency alternating electrical power.
The input AC is converted through a power electronics circuit, and an IGBT inverter generates electrical energy at the required operating frequency.
The induction heating circuit, including the matching transformer and induction coil, creates an alternating magnetic field around the metal workpiece.
This magnetic field induces eddy currents within electrically conductive materials, generating heat through electrical resistance.
For ferromagnetic materials, magnetic losses may also contribute to heating below the Curie temperature.
The distribution of heat depends on operating frequency, workpiece conductivity, magnetic permeability, induction coil geometry, and heating duration.
Medium-frequency induction power generators are especially useful in industrial processes requiring deeper electromagnetic penetration, including steel rod heating, billet forging, and selected metal melting applications.
Key Advantages of Medium Frequency Induction Power Generators
4.1 Deeper Heat Penetration for Metal Forging
Medium-frequency induction heating is commonly selected for applications that require greater electromagnetic penetration compared with higher-frequency surface heating.
This makes the DW-MF series suitable for steel rod heating, billet end heating, localized forging preparation, and selected heat-treatment processes.
Actual heat penetration depends on operating frequency, material properties, temperature, and heating duration.
4.2 Advanced IGBT Inverter Technology
The DW-MF-15KW uses solid-state IGBT inverter technology to convert industrial electricity into medium-frequency heating power.
The inverter provides controlled electrical energy to the induction heating circuit and supports industrial heating applications requiring repeatable operating conditions.
4.3 Compact Power Supply and Transformer Configuration
The system includes a separate generator and transformer arrangement.
This configuration enables flexible installation and allows the induction heating circuit to be adapted to different workpiece requirements.
4.4 Rapid and Localized Metal Heating
Induction heating generates heat directly within electrically conductive workpieces.
Compared with conventional external heating methods, properly designed induction systems can provide rapid temperature rise and localized heating.
4.5 Industrial Protection Functions
The equipment incorporates protection functions designed to reduce operational risks associated with abnormal electrical and cooling conditions.
These include overvoltage, overcurrent, overtemperature, phase-loss, and cooling-water protection.
4.6 Continuous-Duty Industrial Design
The DW-MF-15KW has a published 100% duty-cycle rating at 40°C under specified conditions.
For continuous industrial use, the cooling-water system, electrical supply, induction coil, and operating parameters must meet the manufacturer’s requirements.
MF Induction Power Supply Model Selection
| Model | Rated Power | Published Model-Series Frequency | Typical Application |
|---|---|---|---|
| DW-MF-15 | 15kW | 1–20kHz | Small Rod Heating, Localized Forging |
| DW-MF-25 | 25kW | 1–20kHz | Small Bar Heating, Preheating |
| DW-MF-35 | 35kW | 1–20kHz | Steel Rod Heating |
| DW-MF-45 | 45kW | 1–20kHz | Billet End Heating |
| DW-MF-70 | 70kW | 1–20kHz | Forging and Bar Heating |
| DW-MF-90 | 90kW | 1–20kHz | Industrial Forging |
| DW-MF-110 | 110kW | 1–20kHz | Medium-Duty Heating |
| DW-MF-160 | 160kW | 1–20kHz | Larger Billet Heating |
| DW-MF-300 | 300kW | 1–20kHz | Heavy-Duty Industrial Heating |
FAQs
FAQ 1: What is a medium frequency induction power supply?
A medium frequency induction power supply is an industrial electrical power conversion system that generates medium-frequency alternating current for electromagnetic induction heating.
The system converts incoming industrial AC electricity into controlled electrical energy delivered to an induction coil.
The alternating magnetic field produced by the coil induces electrical currents within conductive metal workpieces, generating heat directly in the material.
Medium-frequency induction heating power supplies are commonly used for metal forging, billet heating, rod heating, induction melting, shrink fitting, and selected heat-treatment applications.
The HLQ DW-MF-15KW is a 15kW IGBT induction heating generator operating at 1–20kHz.
FAQ 2: What frequency range is used for medium frequency induction heating?
Medium-frequency induction heating systems commonly operate from hundreds of hertz to approximately 20kHz, depending on the equipment manufacturer and industrial application.
The HLQ DW-MF-15KW Medium Frequency Induction Generator has a published operating frequency range of 1–20kHz.
Lower frequencies generally provide greater electromagnetic penetration in conductive materials, making them useful for heating larger cross-sections.
Higher frequencies concentrate electromagnetic heating closer to the surface.
The optimum frequency depends on the workpiece diameter, material properties, heating temperature, required penetration depth, and induction coil design.
The actual operating frequency must be compatible with the inverter and resonant heating circuit.
FAQ 3: What is the difference between medium frequency and high frequency induction heating?
The primary difference between medium-frequency and high-frequency induction heating is the operating frequency and its effect on electromagnetic penetration.
Medium-frequency induction heating is commonly selected for billet through-heating, forging preparation, rod heating, and applications requiring relatively deep heating.
High-frequency induction heating is often selected for localized brazing, small-component heating, surface hardening, and applications requiring shallower electromagnetic penetration.
For example, a medium-frequency induction heating system operating at several kilohertz may be more appropriate for heating a steel bar through its cross-section than a much higher-frequency system.
However, actual equipment selection also depends on power, workpiece geometry, heating time, and material properties.
FAQ 4: Can a 15kW medium frequency induction generator be used for metal melting?
Yes. A properly configured 15kW medium frequency induction power generator can be used for certain small-scale metal melting applications.
Suitable applications may include melting small quantities of copper, aluminum, steel, and other electrically conductive metals using an appropriate induction furnace configuration.
However, the generator alone is not a complete melting furnace.
A suitable crucible, induction coil, capacitor arrangement, cooling system, and temperature-resistant furnace structure are required.
The achievable melting capacity and cycle time depend on the metal type, charge weight, initial temperature, furnace efficiency, and operating frequency.
For large-scale metal melting, higher-power medium-frequency induction furnaces are generally more suitable.
FAQ 5: Can a medium frequency induction generator heat steel rods and billets for forging?
Yes. Medium-frequency induction generators are widely used for heating steel rods, bars, and billets before hot forging.
The electromagnetic induction process generates heat inside the steel, helping the workpiece reach the required forging temperature.
The HLQ DW-MF-15KW Induction Heating Generator is suitable for evaluating small-scale forging applications, particularly localized rod-end heating and smaller steel components.
However, larger billets or high-throughput forging production lines require more heating power.
The correct generator should be selected according to the material grade, billet diameter, length, target temperature, heating time, and hourly production capacity.
FAQ 6: What are the advantages of an IGBT medium frequency induction power supply?
An IGBT medium frequency induction power supply uses insulated-gate bipolar transistor technology to control electrical power conversion for industrial induction heating.
Compared with older power electronics designs, modern IGBT systems can offer compact equipment configurations, controllable output power, fast electronic switching, and integrated protection functions.
The DW-MF-15KW incorporates an IGBT inverter circuit and electrical protection against overvoltage, overcurrent, overheating, phase loss, and cooling-water faults.
The actual electrical efficiency, power factor, and energy consumption depend on the inverter design, load matching, operating frequency, and workpiece.
FAQ 7: Can a medium frequency induction power generator operate continuously for 24 hours?
A medium-frequency induction generator with a 100% duty-cycle rating can be suitable for continuous industrial operation when installed and operated within the manufacturer’s specified conditions.
The HLQ DW-MF-15KW has a published 100% duty-cycle rating at 40°C.
For extended operation, the equipment requires a stable three-phase electrical supply, sufficient cooling-water pressure and flow, proper coil matching, and adequate ventilation.
The published cooling requirements are water pressure above 0.2MPa and a flow rate of 6L/min.
These requirements should be verified for the final equipment configuration.
A 100% duty-cycle rating does not eliminate the need for routine inspection, preventive maintenance, and appropriate operating safeguards.
FAQ 8: How do I choose the right medium frequency induction power supply?
Selecting the correct medium frequency induction heating power supply requires evaluating the workpiece material, dimensions, target temperature, heating time, required heating depth, and production capacity.
For metal forging applications, the required power depends on the mass of material heated per hour and the energy needed to reach the forging temperature.
For induction melting, equipment selection must consider charge weight, metal type, furnace efficiency, and required melting time.
Operating frequency should be selected according to the required electromagnetic penetration and the electrical characteristics of the heating circuit.
The HLQ DW-MF-15KW is a compact 15kW solution for selected small-scale forging, metal heating, and heat-treatment applications.
For larger workpieces or higher production rates, HLQ Induction Equipment Co., Ltd. offers additional medium-frequency power supply configurations.
Customers should provide material specifications, workpiece drawings, heating requirements, and production capacity to obtain an appropriate equipment recommendation.
