Converters for industrial use

Dr. Ewald Nelken GmbH - your partner for inductive complete solutions

Customized inductive heating processes adapted to the individual requirements of our customers.

As a medium - sized family business, we have been offering you the complete package for your investment for 4 generations, including recooling systems, loading- and extraction units and any robotics that may be required.

High and medium frequency generators up to 100 kW

We are also happy to offer you the suitable converters for your application. In the high frequency range, we predominantly rely on the MosFet technology, while making the decision for IGBT or MosFet technology in the medium frequency range depending on your particular application.

The high and medium frequency converters we offer are characterized by the following advantages:

  • automatic adaptation of the parameters for the best possible coupling
  • recipes can be stored and retrieved - efficiency and operating costs in optimal ratio
  • a galvanic isolation from the mains is ensured by transformers
  • compact modular design
  • mobile solutions can be realized
  • user-friendly through intuitive graphical touchscreen interface
  • constant and repeatable output power through microprocessor control
  • minimum cooling water flow required
  • energy balance monitoring
  • remote diagnosis possible
  • short-term replacement of assemblies
  • integrated self-diagnosis
  • short delivery time
  • devices comply with the electrical safety regulations and the EMC guidelines
  • master controller
  • Web Server
  • optionally with size-reduced heating heads
  • 24h service

With the growing demand from our customers, we have continued to expand our service and product portfolio. So today we are also your neutral partner for the project planning of your investments in the segment of converters over all frequency and power ranges. We constantly focus on innovative and practical approaches that make operation and maintenance as intuitive, ergonomic and economical as possible while never losing sight of the end result you seek.

With over 60 years of experience in the design of inductive heating systems, we are pleased to be your full-service partner for inductive heating systems.

Since we attach great importance to an individually tailored to your needs system, your wishes and requirements are in the conceptual design of your plants in the foreground. Thus, we always provide you with a coherent concept, from simple stationary heating up to multi-level tempering systems. The solutions developed in this way, consisting of converters, inductors, recooling, pyrometry, feeders, extractors and also robotics, are available from a single source. Once your plant is commissioned and running, our comprehensive After Sale Service will provide you with everything you need.  

Please contact our sales department for technical advice on your individual projects.

Low frequency converters / generators from 100 kW

We are also happy to offer you the right converters for your application. In the low-frequency range, we mainly use IGBT technology in conjunction with an LLC topology. Depending on the selected scope of delivery, the low-frequency converters we offer are characterized by the following advantages:

  • power factor cos-phi in each operating state 0.95
  • paperless recorder to record all relevant data
  • Stop and Go feasible
  • IGBT transistors
  • LLC topology
  • as far as possible standard components
  • very good spare parts supply
  • service beyond the normal lifetime of the system
  • integrated heat exchanger with UPS (power failure proof)
  • Siemens Simatic S7 1500 PLC integrated in operator console
  • independent control of individual inductors with only one converter
  • previous feasibility study
  • easy to maintain
  • modular construction
  • short switch-on and stop times of the system
  • high efficiency
  • easy to control temperature, uniform and constant
  • repeatability of the heating process
  • Immediate reaction of the system to temperature fluctuations
  • registration and reproducibility of working conditions
  • low installation costs - low maintenance costs
  • high adaptability to the work typologies
  • lasting reliability of the machines
  • easy integration into the process automation
  • reduction of the heating time in the workflow
  • simplicity and speed when changing the workflow
  • adaptability to the existing automation
  • 24h service  

With the growing demand from our customers, we have continued to expand our service and product portfolio. So today we are also your neutral partner for the project planning of your investments in the segment of converters over all frequency and power ranges. We constantly focus on innovative and practical approaches that make operation and maintenance as intuitive, ergonomic and economical as possible while never losing sight of the end result you seek.

With over 60 years of experience in the design of inductive heating systems, we are pleased to be your full-service partner for inductive heating systems.

Since we attach great importance to an individually tailored to your needs system, your wishes and requirements are in the conceptual design of your plants in the foreground. Thus, we always provide you with a coherent concept, from simple stationary heating up to multi-level tempering systems. The solutions developed in this way, consisting of converters, inductors, recooling, pyrometry, feeders, extractors and also robotics, are available from a single source. Once your plant is commissioned and running, our comprehensive After Sale Service will provide you with everything you need. 

Please contact our sales department for technical advice on your individual projects.

Recooling Systems

With the sale of recooling systems we round off our offer. We determine the required cooling capacity and integrate it into the overall project. All recooling systems offered by us are manufactured in Europe, the manufacturers have many years of experience with corresponding references. The aftersale service has also been tried and tested for many years and ensures largely trouble-free operation and quick assistance in the event of problems.

Converter refitting / overhaul

Numerous converters from the 60s, 70s and 80s of the 1st generation continue to produce reliable, but increasingly represent a risk of failure. Spare parts and trained service technicians are missing.  

At this point, we advise you neutrally and competently in the further course of action. Is a partial module replacement sufficient or should a completely new converter be installed? Which technology is currently optimized for the application? What downtime and costs arise? After answering these questions, our service technicians will be at your disposal both during the exchange and during the later after - sale service day and night.  

Please contact our sales department for advice on your individual projects.