Induction Heating Device


Induction Heating Device Supply

HLQ Induction Heating Machine Co manufactures a wide range of induction heating device supplies including high frequency power series,medium frequency power series,ultrahigh frequency heater series for heating,brazing,forging,melting,bonding,welding,hardening and heating treatment surface applications and for replacement.

Main Characteristics



  • IGBT module and soft switching inverting technologies are as in the production of the generator,higher reliability can be do.
  • Small and portable ,compared with SCR controlled machine only 1/10 working space is needed. High efficiency to save energy,high efficiency and power far can be maintained
  • The generator is adaptable in a large frequency range from 1KHz to 2.0MHz,installation can be done very easily according to our manual.
  • 100%duty cycle ,continuous working ability at maximum power.
  • Constant power or constant voltage control mode.
  • Display of output power,output frequency,and output voltage.

Series Model Input power Max Input current Max Oscillate frequency Input Voltage Duty cycle


DW-MF-15 Induction Generator 15KW 23A 1KHz-20KHz According to the application 3phases380V±10% 100%
DW-MF-25 Induction Generator 25KW 36A
DW-MF-35Induction Generator 35KW 51A
DW-MF-45 Induction Generator 45KW 68A
DW-MF-70 Induction Generator 70KW 105A
DW-MF-90 Induction Generator 90KW 135A
DW-MF-110 Induction Generator 110KW 170A
DW-MF-160 Induction Generator 160KW 240A
DW-MF-300 Induction Generator 300KW 400A
DW-MF-45 Induction Heating Rod Forging Furnace 45KW 68A 1KHz-20KHz 3phases380V±10% 100%
DW-MF-70 Induction Heating Rod Forging Furnace 70KW 105A
DW-MF-90 Induction Heating Rod Forging Furnace 90KW 135A
DW-MF-110 Induction Heating Rod Forging Furnace 110KW 170A
DW-MF-160 Induction Heating Rod Forging Furnace 160KW 240A
DW-MF-15   Induction Melting Furnace 15KW 23A 1K-20KHz 3phases380V±10% 100%
DW-MF-25   Induction Melting Furnace 25KW 36A
DW-MF-35   Induction Melting Furnace 35KW 51A
DW-MF-45   Induction Melting Furnace 45KW 68A
DW-MF-70   Induction Melting Furnace 70KW 105A
DW-MF-90   Induction Melting Furnace 90KW 135A
DW-MF-110 Induction Melting Furnace 110KW 170A
DW-MF-160 Induction Melting Furnace 160KW 240A
DW-MF-110 Induction Hardening Equipment 110KW 170A 1K-8KHz 3phases380V±10% 100%
DW-MF-160Induction Hardening Equipment 160KW 240A


DW-HF-15 Series DW-HF-15KW 15KVA 32A 30-100KHz Single phase 220V 80%
DW-HF-25 Series DW-HF-25KW-A 25KVA 23A 20K-80KHz 3phases380V±10% 100%
DW-HF-35 Series DW-HF-35KW-B 35KVA 51A
DW-HF-45 Series DW-HF-45KW-B 45KVA 68A
DW-HF-60 Series DW-HF-60KW-B 60KVA 105A
DW-HF-80 Series DW-HF-80KW-B 80KVA 130A
DW-HF-90 Series DW-HF-90KW-B 90KVA 160A
DW-HF-120 Series DW-HF-120KW-B 120KVA 200A
DW-HF-160 Series DW-HF-160KW-B 160KVA 260A





DW-UHF-4.5KW 4.5KW 20A 1.1-2.0MHz Single phase220V ±10% 100%
DW-UHF-6.0KW 6.0KW 28A
DW-UHF-10KW 10KW 15A 100-500KHz 3phases380V±10% 100%
DW-UHF-20KW 20KW 30A 50-250KHz
DW-UHF-30KW 30KW 45A 50-200KHz
DW-UHF-40KW 40KW 60A 50-200KHz
DW-UHF-60KW 60KW 90A 50-150KHz

The theory of induction heating device

In these induction heating devices, series oscillating circuit is applied, through high frequency transformer, low voltage and high current power is output to go through the induction coil.
DW-HF-15KW and DW-HF-25KW series machines are the first models developed in our company, using MOSFET and IGBT components and our first generation inverting control technology,  the machines are featured with simple structure, high reliability and low price, and they are easy to use and to repair, and are now the most widely used machines both in China and abroad.

In DW-HF-35KW and DW-HF-45KW series induction heating machines, IGBT module and our second generation inverting control technology has been used, that is the dual control and inverting technology. In these new technologies, output power and oscillating frequency are controlled independently. we use IGBT components and high frequency voltage regulate control circuit to control the power and we use IGBT components, series oscillating and automatic tracing circuit to reach  soft switching in the inverting course, all these make the machine to be more reliable and make the machine possible to work continuously with 100% duty cycle.

Compared to machines with first generation technology, second generation technology is more suitable for large power machines to get higher reliability.
Due to the adopting of advanced technology, DW-HF-35KW and DW-HF-45KW series machines are acetized by larger frequency range, smaller size, water cooled transformer, higher reliability and lower repair cost.

Inside DW-HF-70KW  series induction heating device, IGBT module and our third generation inverting control technology has been used, that is the soft and dual control and inverting technology. In this technology, output power and frequency can be controlled and adjusted separately, IGBT module and soft switching control technology are used in the high frequency switching circuit to control the output power.  In the inverting circuit, the IGBT and frequency tracing circuit is applied to achieve high speed and accurate soft switching control. The adoption of new technologies not only improves the quality and reliability of the machine,but also solve the technology problem on large power induction heating machine and makes it possible to work 100% duty cycle.


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