Electromagnetic Induction Heater


Electromagnetic Induction Heatersfor heating plastic injection molding machine

Principle of Electromagnetic Induction Heating:

Most of the metal is heated by the high-frequency magnetic field and uses this principle to pass the high-frequency current through the coil, so that the coil generates a high-frequency magnetic field, so that the metal rod in the coil is induced to generate heat. The electrical energy can be converted into metal thermal energy by the above process. During the whole process, the metal rod does not have any physical contact with the coil, and the energy conversion is completed by the magnetic field eddy current and the metal induction.

 Advantages of electromagnetic induction heating:

1.Energy saving and emission reduction (30-85%)

2.higher thermal efficiency

3.Reduced operating temperature

4.warm up fast

5’long service life

6.Maintenance is simple and convenient


What Advantages Does Induction Heater Have Compared With Traditional Heaters?

Advantage Comparison
Electromagnetic Induction Heater Traditional Heater
Heating Principles Electromagnetic Induction Heating the  Resdistance Wire
Heated Part Charging barrel is heated directly to get higher efficiency ,but the induction coil itself is not heated to guaratte longer using life heater itself,then heat transfered to the charging barrel
Surface Temperature & Safety Max. 60 Degree Centigrade,safe to touch by hands. The same with your heating temperature, Dangerous to touch
Heating Rate High Efficiency:save 50%-70%warming -up time Low Efficiency:No time-saving
Energy Saving Save 30-80% Power Consumption No Saving
Temperature Control High precision Low Precision
Using life 4-5year 2-3year
Working Environment Normal temperature for workers,easy and comfortable Hot,especially for low latitude Area
Cost Cost-effective,with30-80% energy-saving rate,it takes 6-10 months to recover the cost. The higher the rate is,the less time it takes. Low


Application of electromagnetic induction heater:

1.Plastic rubber industry: plastic film blowing machine, wire drawing machine, injection molding machine, granulator, rubber extruder, vulcanizing machine, cable production extruder, etc.;

2.Pharmaceutical and chemical industry: pharmaceutical infusion bags, plastic equipment production lines, liquid heating pipelines for the chemical industry;

3.Energy, food industry: heating of crude oil pipelines, food machinery, super freighters and other equipment that require electric heating;

4.Industrial high-power heating industry: machine for killing machine, reaction axe, steam generator (boiler);

5.Smelting heating industry: die casting furnace zinc alloy, aluminum alloy and other equipment;

6.Building materials industry: gas pipe production line, plastic pipe production line, PE plastic hard flat net, geonet net unit, automatic blow molding machine, PE honeycomb board production line, single and double wall corrugated pipe extrusion production line, composite air cushion film unit, PVC hard Tube, PP extrusion transparent sheet production line, extruded polystyrene foam tube, PE winding film unit;

7.high power commercial induction cooker movement;

8.Dry heating in printing equipment;

9.other similar industry heating;

Technical Parameters


Technical Parameters

Rated power 10KW,3phases, 380V (It can be customized)
Rated input current 10KW (14-15A)

Rated output current

10KW (50-60A)
Rated voltage frequency

AC 380V/50Hz

Voltage adaptation range constant power output at 300 ~ 400V
Adapt to ambient temperature -20ºC~50ºC
Adapt to environmental humidity ≤95%
Power adjustment range 20% ~ 100% stepless adjustment(That is: adjustment between 0.5 ~ 10KW)
Heat conversion efficiency ≥95%
Effective power

≥98%(Can be customized according to user needs)

working frequency


Main circuit structure Half-bridge series resonance
Control System DSP-based high-speed automatic phase-locking tracking control system
Application mode Open application platform
monitor Programmable digital display
start time <1S
Instantaneous overcurrent protection time ≤2US
Power overload protection 130% instantaneous protection
Soft start mode Fully electrically isolated soft start heating / stop mode
Support PID adjustment power Identify 0-5V input voltage
Support 0 ~ 150 ºC load temperature detection Accuracy up to ± 1 ºC
Adaptive coil parameters 10KW  10 square line, length 30~35m, inductance 150 ~ 180uH
Coil to load distance(Thermal insulation thickness) 20-25mm for circle, 15-20mm for plane, 10-15mm for ellipse and within 10 mm for super ellipse


Model No. Input Voltage Rated Power Inductance Current Coil Wire
DW-2.5K220A AC220V 2.5KW 100uH 11A 4mm2
DW-3.5K220A AC220V 3.5KW 90uH 15A 4mm2
DW-5K220D AC220V 5KW 160uH 22.5A 6mm2
DW-6K220D AC220V 6KW 150uH 27A 6mm2
DW-8K220D AC220V 8KW 140uH 36A 10mm2
DW-10K220D AC220V 10KW 130uH 45A 10mm2
DW-3.5K380D AC380V 3.5KW 250uH 5A 4mm2
DW-5K380D AC380V 5KW 230uH 7.5A 6mm2
DW-8K380D AC380V 8KW 170uH 12A 6mm2
DW-10K380D AC380V 10KW 150uH 15A 10mm2
DW-12K380D AC380V 12KW 130uH 18A 10mm2
DW-15K380D AC380V 15KW 125uH 22.5A 16mm2
DW-20K380D AC380V 20KW 100uH 30A 20mm2
DW-25K380D AC380V 25KW 90uH 37.5A 25mm2
DW-30K380D AC380V 30KW 200uH 45A 16mm2
DW-40K380D AC380V 40KW 180uH 60A 20mm2
DW-50K380D AC380V 50KW 160uH 75A 25mm2
DW-60K380D AC380V 60KW 150uH 90A 30mm2
DW-80K380D AC380V 80KW 120uH 120A 50mm2