EGMA Series

Serie EGMA is a range of state of the art "Solid State" Inductive Heating Generators which grants reliability, safety and repeatability to your heating process.
EGMA is the result of long experience in the field, reached thanks to many years of Felmi’s dedication to the Inductive Heating niche of application and to its continuous R&D activity.

serie egma 1
serie egma 1
Superb performances with compact overall dimensions are the distinctive characteristics of these devices.
If your production process requires a 6 to 30 Kw Power and a 50 to 300 kHz Frequency, Egma is the most suitable solution at the best "quality-price" ratio.

This range of Induction Generators, as well as all the others induction ovens, has to be chilled by means of water.
Meeting this need can very often be difficult for the end user since water is not always available in the production facilities.

To solve this possible problem Felmi has designed a version "Chilling Unit integrated" of the EGMA SERIES.
This version of the Egma Induction Generators don't need external water supply and the end user has to provide only electric power.

EGMA Series is also produced in the "Conditioned version", a very suitable version for very hot and humid facilities but which still needs water for the cooling process.
The heating of metals by means of “induction system” it is definitely the most widespread method in the industrial fields. This supremacy comes from the benefits that this system can grant and the main ones are:
  • very high energy yields
  • aimed and thermo-controlled heating
  • low pollution rate
  • free flames free process
  • very low maintenance costs
  • Product Model
  • Main applications
  • Benefits and Advantages
  • Control Panel
  • Signals for users
  • Cooling






EGMA 6 6 KW T1 400/3/50 Hz
EGMA 10 10 KW
EGMA 15 15 KW T1-T2
EGMA 20 20 KW T3
EGMA 25 25 KW
EGMA 30 30 KW
All EGMA Inductive Heating Generators consist of n° 2 different components:
  1. Power & Control cabinet (Same footprint for all models).
  2. Heating Head (with different dimensions and weights according to power range).

Technical Data - Working Performances

Outlet Power
6 10 15 20 25 30
Absorbed Power
7,2 12 18 24 30 36
Power Cabinet Dimension
300(W) x 530(D) x 470(H)
Power Cabinet Weight 40 Kg 55 Kg
Heating Head Type
T1 T1 o T2 T3
Cooling System flow-rate 3 liter/min 3 liter/min 3 liter/min 7 liter/min 7 liter/min 7 liter/min
Cooling System min. Pressure 4 bar 4 bar 4 bar 5 bar 5 bar 5 bar
Exit Frequency Range From 50 to 300 kHz
Standard Voltage 3 Phase / 400 volts / 50-60 Hz
Max. Exit Voltage 400 Vrms 400 Vrms 500 Vrms
Heating Head Connection Cable length
5 mts Standard, up to 12 mts as Option


Dimensions and weights

Head Type
T1 T2 T3
Dimensions 136(W) x 300 (D) x136 (H) 136(W) x 374 (D) x136 (H) 176(W) x 380 (D) x 263 (H)
8 Kg 10 Kg 16 Kg

Main Applications

Here below list of Main Applications where use of EGMA is suitable

Benefits and Advantages

The circuits’ characteristics of Egma Generators grant the following advantages:
Process repeatability:
in order to grant a whole repeatability of the heating process Egma Generators foresee an exit voltage control system “loop type” which, cycle by cycle, grants a whole repeatability of the heating process.
High reliability:
reliability of different models is the result of a careful design which allows the different power components not to be stressed. This also thanks to the fitted intrinsic safeties that protect the Generator in case of unexpected situation such as short circuits onto the inductor, casual openings of the same inductor, power supply drops, etc.
Operator’s friendly equipment thanks to the "Auto-Tuning System":
an automatic “hooking system” of the resonance frequency, so called "Auto-Tuning System" allows the operator to use different shaped inductors (therefore inductors with different induction values) without any need of resetting or recalibrating the device. The Generator itself resets automatically.
Energy Saving/Power Output:
transistors technology grants a 95% power output of the inductor compared to the 65% power output of the old style Triodes generators.

Control Panel

Egma Series Generators are equipped with latest technology Control and Visualization Panel.

Thanks to the two Microprocessors fitted onto the machine, all operational parameters can be displayed on the control panel and heating length of time can be set with a 0,1 sec. accuracy. Working settings and threshold safety values can be displayed as well.
OPERATIONAL MODES: Egma Series Generators can operate in the following different modes:
  1. Process Control
  2. Continuous mode
  3. Timing mode
PROCESS CONTROL: this mode, thanks to a dedicated device, allows the Generator to run – with the help of an optical pyrometer – heating processes that automatically adjust the thermo-settings.
when using this operation mode, endless time cycles can be processed. Start phase and stop phase of the heating process can be selected by the “ON-OFF” switch placed on the Control Panel or, alternatively, by an external pedal.
this operation mode allows to determine the time length of the heating phase, by using a digital timer placed on the Control Panel. Time length can vary from 0,1 to 600 sec. with 0,1 resolution. Start phase of the heating process can be selected by the “ON-OFF” switch placed on the Control Panel or, alternatively, by an external pedal.

Available Signals for Users

The operator has got the following available analogic and digital signals:
  X 0-10 Volts Signal proportional to the power supplied by the Generator
X   0-10 Volts Signal for setting power coming from a remote source
X   4-20 mA Inlet for the infra-red optical pyrometer
X   0-10 Volts Inlet proportional to the wire's speed (typical applications are cables heating or moulding process by continuous wire)
  X 0-10 Volts Signal proportional to temperature read by the pyrometer
  Heating process Start/Stop
  X Generator in Heating phase
  X Generator in alarm Status


Generators have to be water cooled and they differ as follows:
  • EGMA 6, EGMA 10, EGMA 15: these generators are equipped with one only water circuit; water cools both the power’s electronic components and the inductor.
  • EGMA 20, EGMA 25, EGMA 30: these generators are equipped with two separate water circuits: the first one cools the power’s electronic components (inlet and outlet placed in the back side of the generator); the second one cools the inductor (inlet and outlet placed in the back side of the heating head).
Both circuits are equipped with a flowmeter device for checking the cooling flow: in case the cooling flow gets blocked or works at reduced rate, generator stops the power supply.
Power’s electronic components water circuit data:
Minimum Pressure: 4 bar
Max. Pressure: 10 bar
Max. Temperature: 26° Celsius
Water hardness: < 0,3 French degrees
Inductor’s water circuit data (EGMA 20, EGMA 25, EGMA 30, only).
To this circuit it is possible to supply industrial water.
Suggested Pressure: 6 bar
Max. Pressure: 10 bar
Max. Temperature: 38° Celsius


In order to avoid any problem or complication Felmi can offer a “Turn-Key” solution consisting of an Egma Generator with an already "Integrated Cooling Unit".