Solutions tailor-made.

Individual solutions become standards.

One of Expert's main areas of expertise is the implementation of customer requirements. In addition to the flexible adaptation of existing products, this also includes the development of completely new solutions in the field of high-current technology.

Three phase systems

In addition to the standard single-phase solutions, the transformers can also be connected in three-phase configuration. Individual solutions in resistance welding and heating can be implemented in all power classes. The following requirements are taken into account:

Secondary rectifier bridges
Different switching groups
Scott and economy circuits
Integration of monitoring functions

Picture Heating Transformer 420kVA for Glass Melting

Complete solutions

Expert supports and implements complete solutions including:

Electrical, hydraulical and mechanical design
Cabinet mounting
Integration of control and regulation components
Electrical connection

Picture special transformer for flash butt welding MF 3714kVA

Special solutions

High-current applications are diverse and so are their requirements. We offer special solutions for and with:

Permanent currents >200kA
Sekundary voltage of >100V even for MFDC
Frequencies of up to 20 kHz
Very short pulses
High current rise times
Adjusted induction and leakage inductance
Loss optimized transformers and inductances
Rectifier protection circuits

Replacements

Transformers and other high-current components are generally very durable. Nevertheless, these also break down from time to time. After many years, the original manufacturers are no longer on the market and solutions are needed. We place a high focus on the interfaces and ensuring the previous functionality. In addition to the rebuilding of old transformers, we also offer support in the conversion to new technologies (DC, medium frequency ...). Here we advise the customer comprehensively and establish the necessary contacts in areas of control and mechanical engineering.

Picture coaxial transformer for induction welding

Induction heating

Increasingly, we are opening up new markets. Among others, in the field of induction heating. The following products have been implemented at the request of customers: