EKOHEAT Induction Heating Systems for the 15 to 40 kHz Range

The EKOHEAT induction heating systems for the 15 to 40 kHz frequency range from Ambrell provide repeatable and reliable solutions for heating larger parts that require higher frequencies. Among the many general applications are heat treating of steels, crystal growing, preheating for forging of aluminum, steel, copper, or brass, and heating of graphite and metal crucibles.

With the versatile EKOHEAT power control system, users get fast tuning, a 12-bit power control with a 0.024% resolution, efficient and precise heating of parts, and a user-friendly, easy-to-read front panel. Remote control is achieved with 0-10 V, 4-20 mA inputs, 24 V controls, RS485 serial port, Modbus and remote E-Stop input so integration with your automated production lines is simple. The EKOHEAT technology enhances return on investment by decreasing energy usage compared to gas-fired and resistive heating methods.

Flameless, non-contact induction heating lowers energy waste by directing energy solely on the part and zone to be heated. With highly efficient power conversion and a power factor greater than 0.9, utility demand charges are decreased, bringing down monthly energy bills. The EKOHEAT systems are engineered for efficient use of cooling water, further minimizing the operating costs. This is a water-cooled system, needing connection to a heat exchanger or other ways of dissipating heat.

EKOHEAT at-a-Glance


  • Efficient heating of many part geometries,  compositions, and sizes
    • Multiple tap transformer configurations
    • Multiple capacitor configurations
    • Voltage or power control
  • Through-Curie heating
  • Remote operation or logging with RS485 port
  • Sub-second to continuous cycle times
  • Repeatable, consistent heating, agile frequency tuning
  • Movable workhead; up to 30 m (100')
  • Accepts international AC line voltages

Easy to Use

  • User-friendly operator front panel controls
  • 10 ten-step heating profiles
  • Cycle timer, peak and short-cycle data capture
  • Overload-tolerant output management
  • System diagnostics displayed on front panel
  • Seven-language display suite (EN, IT, PT, FR, DE, ES, PL)

The EKOHEAT is CE marked and manufactured at Ambrell’s IS0 9001:2008 certified facility.


SPECIFICATION 20/25 35/25 50/25 UNITS
RF Terminal Power 20 35 50 kW
AC Line Power 23 41 58 kVA
Power Factor 0.92  
Output Frequency 15 - 40 kHz
AC Line Voltage 360 - 520 Vac, 3Ø
AC Line Protection1 50 80 100 A
Display LCD Monochrome, 240 w x 128 h Pixels  
Serial Communication RS485 Standard (RS485/232 Converter Optional)  
Process Timer 0.01 - 10000 sec
Max Ambient Temp 45 (115) °C (°F)
Compliance2 CE, EN61010, EN55011  
Ingress Protection IP54  
Power Unit Dimensions 432 x 711 x 762 (17 x 28 x 30) WxDxH mm (in)
Weight 88 (195) kg (lb)
Flow3 9.5 (2.5) l/m (g/m)
Pressure Differential (Range) 2.8 - 5.5 (40-80) Bar (lb/in2)
Maximum Input Pressure 5.6 (80) Bar (lb/in2)
Max Water Temp 35 (95) °C (°F)

1) Fast-acting fuses
2) Suitable for incorporation into equipment for compliance with Machinery Directive
3) Power supply; required workhead coil flow requirements vary by application

Options and Accessories

The EKOHEAT comes with a front panel programmable controller for monitoring, diagnostics, timer and power-level control, and system configuration. It is possible to configure up to 10 ten-step heating profiles to regulate power levels over one’s specified timing requirements.

  • Cooling systems
  • Pendant station
  • Start-up assistance
  • Front E-stop with retransmission
  • Footswitch
  • Redundant safety relays
  • External controller (PLC)
  • eVIEW serial data reporting
  • Broadband frequency range (2-15 kHz)
  • Complete spare parts kits
  • Extended workhead cable lengths
  • Optical pyrometer  (closed-loop temperature control)


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