What Is a Solid State IGBT Induction Heating Power Supply?

A solid state IGBT induction heating power supply is an industrial electronic power converter that uses insulated-gate bipolar transistor (IGBT) technology to generate controlled alternating electrical power for electromagnetic induction heating applications.

The HLQ DW-MF-25KW Solid State Induction Heating Generator features a published maximum oscillation power of 25kW and an operating frequency range of 1–20kHz. It is designed for medium-frequency induction heating applications requiring localized heating, controlled thermal processing, and relatively deep electromagnetic penetration.

Unlike conventional resistance heating, an induction heating power supply delivers electrical energy to an induction coil, generating an alternating magnetic field that heats conductive metal workpieces through induced currents.

The DW-MF-25KW system is suitable for selected small-scale industrial applications, including steel rod forging, billet end heating, metal heat treatment, shrink fitting, mold preheating, and small-scale induction melting when configured with suitable auxiliary equipment.

Manufactured by HLQ Induction Equipment Co., Ltd., this medium-frequency induction generator incorporates IGBT inverter technology, a water-cooled heating circuit, and multiple electrical protection functions.

For additional equipment configurations, explore HLQ’s
industrial induction heating power supplies.

Key Product Features

• Model: DW-MF-25KW
• Maximum Oscillation Power: 25kW
• Operating Frequency: 1–20kHz
• Input Voltage: Three-Phase AC 380V
• Technology: Solid-State IGBT Inverter
• Cooling: Water-Cooled System
• Duty Cycle: 100% at 40°C under specified conditions
• Applications: Forging, Rod Heating, Heat Treatment, Shrink Fitting and Small-Scale Melting
• Induction Coil: Customized According to Workpiece

DW-MF-25KW IGBT Induction Heating Power Supply Technical Specifications

The DW-MF-25KW medium frequency induction power supply combines solid-state power electronics with electromagnetic induction heating technology. The following table provides the published technical parameters and main equipment specifications.

Engineering Note: The published 25kW rating refers to maximum oscillation power. The 36A maximum input-current specification should be verified against the actual equipment configuration before electrical installation. Complete-system cooling requirements should also be confirmed before commissioning.

Advantages of the 25kW Solid State IGBT Induction Heating Power Supply

1. Advanced Solid-State IGBT Inverter Technology

The DW-MF-25KW uses IGBT inverter technology to convert industrial electrical power into medium-frequency energy for induction heating applications.

IGBT technology provides electronic power switching, controllable energy delivery, and a compact power conversion arrangement suitable for industrial heating equipment.

Compared with conventional external heating methods, a properly configured induction system can offer improved control over heating location and processing time.

2. Medium Frequency Heating with Greater Electromagnetic Penetration

The operating frequency range of 1–20kHz makes the DW-MF-25KW suitable for applications requiring greater electromagnetic penetration than many high-frequency surface-heating processes.

Medium-frequency induction heating is commonly applied to steel rod heating, billet end heating, and selected industrial heat-treatment operations.

However, the actual heating depth depends on material conductivity, magnetic permeability, operating frequency, heating duration, and workpiece geometry.

3. Fast and Localized Metal Heating

Induction heating generates heat directly within electrically conductive workpieces through induced electrical currents.

This allows energy to be delivered to selected regions of a metal component without necessarily heating the entire workpiece or surrounding equipment.

For suitable industrial applications, localized heating can reduce processing time and unnecessary thermal exposure.

4. Reliable Industrial Protection Functions

The DW-MF-25KW incorporates several electrical and thermal protection functions designed to reduce equipment risks associated with abnormal operating conditions.

• Overvoltage protection
• Overcurrent protection
• Overtemperature protection
• Phase-loss protection
• Cooling-water shortage alarm and protection

These protection functions should be used together with appropriate electrical installation, machine guarding, maintenance procedures, and safe operating practices.

5. Continuous-Duty Industrial Design

The DW-MF-25KW has a published 100% duty-cycle rating at 40°C under specified operating conditions.

For continuous production, the cooling-water system, electrical power supply, induction coil, and operating parameters must satisfy the manufacturer’s requirements.

6. Compact Design and Flexible Installation

The generator and capacitor-unit configuration allows installation in industrial heating workstations.

Customized induction coils can be designed for steel rods, shafts, mechanical fittings, metal housings, molds, and other conductive components.

For larger workpieces and higher production requirements, HLQ also provides
medium frequency induction heating systems
with different power configurations.

7. Reduced Dependence on Open-Flame Heating

Electromagnetic induction heating eliminates the need for direct flame heating at the workpiece.

The technology can improve heating repeatability and reduce unnecessary thermal exposure when correctly engineered for the application.

Actual energy efficiency and productivity improvements depend on the workpiece, heating cycle, equipment design, and comparison process.

Industrial Applications of the DW-MF-25KW Induction Heating Generator

The 25kW IGBT induction power supply can be configured for different industrial heating processes using application-specific induction coils and suitable auxiliary equipment.

1. Steel Rod Induction Heating for Forging

Medium-frequency induction heating is widely used to raise steel rods and bars to suitable temperatures before hot forging.

The DW-MF-25KW can be considered for selected small steel rod and localized end-heating applications.

The alternating electromagnetic field generated by the induction coil produces heat within the steel workpiece, allowing the required section to reach its target forming temperature.

Actual heating capacity depends on the steel grade, rod diameter, heated length, target temperature, and heating cycle.

Explore more
induction forging and hot forming applications
for different steel and nonferrous metal components.

2. Small Steel Billet Induction Heating

The DW-MF-25KW medium-frequency induction generator can be configured for localized heating of selected small metal billets.

Compared with higher-frequency systems, medium-frequency operation can provide greater electromagnetic penetration under comparable material conditions.

This makes medium-frequency induction heating useful for selected billet end-heating and small-scale forming applications.

For larger billets or high-throughput forging lines, higher-power induction heating systems are generally required.

3. Small-Scale Induction Metal Melting

A properly configured 25kW medium frequency induction power supply can support certain small-scale metal melting applications.

Potential materials include:

• Aluminum and aluminum alloys
• Copper and copper alloys
• Brass
• Steel and selected ferrous alloys

The induction melting application requires a suitable furnace body, induction coil, crucible, cooling system, and electrical matching arrangement.

The generator alone is not a complete melting furnace, and its maximum oscillation power does not independently determine metal melting capacity.

For larger melting capacities, explore HLQ’s
industrial induction melting furnaces.

4. Induction Shrink Fitting and Thermal Assembly

Induction heating can be used to temporarily expand suitable metal components before interference-fit assembly.

Typical applications include heating steel hubs, metal housings, bearing seats, and selected mechanical assemblies.

The required heating temperature depends on the material’s thermal expansion coefficient, component dimensions, interference allowance, and permissible thermal stress.

A customized induction coil allows heating to be concentrated in the required assembly area.

5. Shaft and Gear Induction Heat Treatment

The DW-MF-25KW can be considered for selected shaft and gear heat-treatment processes.

For induction hardening, the steel material must have suitable hardenability, and the heating cycle must be combined with an appropriate quenching system.

The final hardness, hardened depth, and microstructure depend on material composition, operating frequency, heating temperature, and quenching conditions.

6. Mold and Die Preheating

Medium-frequency induction heating can be used to preheat selected metal molds, dies, and tool components before industrial processing.

Controlled preheating may help reduce thermal gradients and improve process preparation when the heating system is properly designed.

The required induction power and coil geometry depend on the mold mass, material, geometry, and target temperature.

7. Welding Joint Preheating

The DW-MF-25KW can potentially be configured for localized welding preheating of suitable steel components.

Induction preheating raises the temperature of selected metal areas before welding, helping manufacturers meet applicable welding procedure requirements.

The required preheating temperature depends on the steel grade, material thickness, welding procedure, and applicable technical standards.

Recommended Applications and Induction Coil Selection

Important: The listed applications describe potential configurations rather than guaranteed production capabilities. Final equipment selection requires evaluation of the workpiece dimensions, material properties, heating time, and production requirements.

How Does a Solid State IGBT Induction Heating Power Supply Work?

A solid-state IGBT induction heating power supply converts incoming industrial electrical power into controlled medium-frequency alternating energy.

The induction heating process involves four main stages.

Step 1: AC Power Conversion

Three-phase industrial AC electricity enters the power supply and is converted through the rectification and power conversion circuitry.

Step 2: IGBT Inverter Operation

The IGBT inverter generates medium-frequency electrical power for the induction heating circuit.

The operating frequency must match the requirements of the inverter, resonant circuit, induction coil, and connected load.

Step 3: Electromagnetic Induction

Alternating current flowing through the induction coil creates a changing magnetic field around the workpiece.

When an electrically conductive metal component is placed within this field, electrical currents are induced inside the material.

Step 4: Metal Heating

The induced currents generate heat through the electrical resistance of the metal.

For ferromagnetic materials, magnetic losses can also contribute to heating below the Curie temperature.

The final temperature distribution depends on the operating frequency, electrical conductivity, magnetic permeability, coil geometry, heating duration, and thermal properties of the workpiece.

This heating principle makes medium frequency IGBT induction generators useful for industrial applications requiring controlled energy delivery and relatively deep heating penetration.

Frequently Asked Questions About 25kW IGBT Induction Heating Power Supplies

FAQ 1: What is a solid state IGBT induction heating power supply?

A solid state IGBT induction heating power supply is an industrial electronic device that converts incoming AC electricity into controlled alternating electrical power for electromagnetic induction heating.

It uses IGBT semiconductor switching technology to supply power to an induction heating circuit.

The HLQ DW-MF-25KW is a medium-frequency induction heating generator with a published maximum oscillation power of 25kW and an operating frequency range of 1–20kHz.

Typical applications include metal forging, rod heating, small-scale melting, shrink fitting, and selected heat-treatment operations.

FAQ 2: What is the difference between IGBT and SCR induction heating power supplies?

IGBT and SCR induction heating power supplies use different semiconductor technologies for electrical power conversion.

IGBT-based systems use gate-controlled transistors that can be switched electronically, supporting compact inverter designs and controlled high-frequency switching.

SCR-based systems use silicon-controlled rectifiers and are widely applied in industrial induction melting and heating equipment.

IGBT power supplies can offer advantages in controllability, equipment size, and inverter configuration.

However, electrical efficiency, reliability, and maintenance requirements depend on the complete system design rather than semiconductor type alone.

FAQ 3: What frequency does the DW-MF-25KW induction generator operate at?

The HLQ DW-MF-25KW Solid State Induction Heating Generator has a published operating frequency range of 1–20kHz.

The appropriate operating frequency depends on the workpiece diameter, material properties, required heating penetration, induction coil, and resonant circuit.

Lower frequencies generally provide greater electromagnetic penetration, making them useful for heating larger metal cross-sections.

Higher frequencies concentrate electromagnetic heating closer to the surface.

The final operating frequency must remain within the equipment’s supported configuration and load-matching limits.

FAQ 4: Can a 25kW IGBT induction heating machine heat steel rods for forging?

Yes. A 25kW medium-frequency induction heating generator can be suitable for selected small-scale steel rod forging and localized end-heating applications.

The machine heats steel through electromagnetic induction, allowing the workpiece to reach the temperature required for forming.

However, workpiece capacity depends on the steel grade, rod diameter, heated length, target temperature, and heating cycle.

Larger steel bars or high-throughput forging production lines generally require higher installed power.

For accurate equipment selection, manufacturers should provide workpiece dimensions and required production capacity.

FAQ 5: Can the DW-MF-25KW induction power supply melt copper and aluminum?

The DW-MF-25KW can potentially be used for small-scale copper and aluminum melting when connected to a suitably designed induction furnace.

The installation requires a compatible crucible, induction coil, capacitor or matching circuit, and cooling system.

Aluminum melts at approximately 660°C, while pure copper melts at approximately 1085°C.

The achievable melting capacity depends on metal mass, furnace efficiency, starting temperature, crucible design, and operating conditions.

The induction power supply alone does not determine melting capacity or guarantee compatibility with a particular furnace.

FAQ 6: What cooling system is required for a 25kW induction heating power supply?

The DW-MF-25KW is a water-cooled induction heating generator.

The published cooling-water requirements specify pressure above 0.2MPa and a flow rate of 6L/min.

However, the cooling requirements of the complete installation may be higher depending on the induction coil, capacitor unit, heating station, and operating duty.

An industrial recirculating water-cooling system should provide stable cooling performance and suitable water quality.

The final cooling capacity should be confirmed against the manufacturer’s equipment configuration.

FAQ 7: Can a solid state IGBT induction heating power supply operate continuously for 24 hours?

The HLQ DW-MF-25KW has a published 100% duty-cycle rating at 40°C under specified operating conditions.

This indicates that the machine is designed for continuous operation when the cooling system, electrical supply, induction coil, and operating parameters meet the applicable requirements.

Continuous industrial operation requires appropriate maintenance, cooling-water monitoring, electrical protection, and temperature management.

The 100% duty-cycle specification should not be interpreted as a guarantee of uninterrupted operation under all conditions.

FAQ 8: How do I select the correct IGBT induction heating power supply?

Selecting an IGBT induction heating power supply requires evaluating the workpiece material, dimensions, heating temperature, required heating depth, heating time, and production rate.

The operating frequency must be selected according to material properties and workpiece geometry.

The required heating power depends on the thermal energy needed, heating efficiency, and processing time.

For smaller forging, shrink-fitting, and localized heating applications, the HLQ DW-MF-25KW may be a suitable option.

Larger workpieces or demanding production requirements may require higher-power induction heating systems.

HLQ Induction Equipment Co., Ltd. can recommend suitable induction power supplies and customized induction coils based on customer specifications.

Why Choose HLQ Induction Heating Equipment?

HLQ Induction Equipment Co., Ltd. manufactures industrial induction heating equipment, power supplies, and customized heating systems for metalworking applications.

Our product range includes medium-frequency induction heating power supplies, high-frequency induction heaters, induction forging equipment, metal melting furnaces, induction hardening machines, and specialized industrial heating solutions.

The DW-MF-25KW Solid State IGBT Induction Heating Power Supply is designed for manufacturers requiring a compact medium-frequency heating generator for selected metal heating and heat-treatment applications.

HLQ can assist customers with evaluating suitable induction heating power, operating frequency, induction coil design, and equipment configuration according to workpiece specifications.

Information Required for Equipment Selection

• Workpiece material and metal grade
• Workpiece dimensions and weight
• Initial and target heating temperatures
• Required heating time
• Hourly production capacity
• Required heating depth or heated length
• Available electrical power supply
• Cooling-water conditions
• Manual or automatic operation requirements

Providing complete technical requirements helps ensure that the selected induction heating equipment meets the intended manufacturing process.

25kW IGBT Induction Heating Generator – Product Summary

The HLQ DW-MF-25KW Solid State IGBT Induction Heating Power Supply is a compact industrial medium-frequency generator with a published maximum oscillation power of 25kW and an operating frequency range of 1–20kHz.

It combines IGBT inverter technology, water-cooled operation, and industrial protection functions for selected metal heating applications.

The equipment can be configured for steel rod heating, localized forging, small-scale metal melting, shrink fitting, and suitable heat-treatment processes.

For reliable equipment selection, the required induction power, operating frequency, customized coil, and cooling system should be determined according to actual workpiece and production requirements.

Manufacturer: HLQ Induction Equipment Co., Ltd.
Product Model: DW-MF-25KW
Power Rating: 25kW Maximum Oscillation Power
Operating Frequency: 1–20kHz
Technology: Solid State IGBT Inverter
Primary Applications: Forging, Metal Heating and Heat Treatment