etatronix GmbH is a technology company specialized in the customer-specific development of energy supplies for devices and systems. A special focus involves systems for wireless power transmission. Using state-of-the-art, tried and tested technologies, etatronix offers solutions in the power range up to 10kW.

Customers worldwide profit from the long years of experience in the areas of analogue and digital hardware as well as firmware development. The development team of the company founded in 2014 has been working successfully since 2007 in the field of non-contact energy transmission, and has since then developed numerous systems for the market segments medical technology, industry and automotive up to serial maturity. Alongside customer satisfaction,

the optimization of costs, efficiency, and electromagnetic compatibility are the utmost priority.

In order to make the development and introduction of the relatively new technology of contactless energy transmission as simple as possible, etatronix positions itself as a new link between the customer and an existing supplier. In collaboration with the customer, etatronix elaborates a cost-optimized concept for energy management, which is then developed to serial maturity in close cooperation with the customer and supplier. This early collaboration makes it possible to produce wireless energy supply or charging systems at almost identical costs and at a similar high level of efficiency compared to conventional cable or contact-bound systems.



Wired and Wireless Power and Data Transmission

In the consumer market the standardization of wireless and contactless energy transmission is imperative if successful market introduction is to be achieved. If, however, in the case of a customer-specific development, interoperability is not necessary or even desired, transmission systems optimized to customer requirements and with higher efficiency and substantially reduced costs can be accomplished. Simultaneous data transmission is also possible. Both the energy and the data transmission can be arranged bidirectionally.

Uni- or bidirectionale power and data transmission

Wired Power Supplies

As well as wireless and contactless power transmission systems, the developers at etatronix have also developed a large number of customer-specific AC/DC and DC/DC converters over the years, for example for medical or industrial applications. The focus of these developments was always the minimization of the system costs with maximum performance and customer satisfaction.

Medical car power supply

Cable- and Contactless Charge Management

In the power range up to 1kW, etatronix offers the charging of batteries and individual cells for almost every type of cell chemistry, using wireless and wire-bound transmission systems. For example, the non-contact charging of a simple lithium ion battery with 2.5W or the non-contact charging of an e-bike battery with 500W are no problem.

Inductive, ruggedized charging of an e-bike

Test Systems

Alongside its customer-specific product development, etatronix supports the developers of standards-compliant inductive transmission systems worldwide by the provision of semi-automatic test systems. These facilitate the development and the approval according to the relevant standards. As an example, the first tester for power transmitters of the Power Matters Alliance was presented during the PMA PlugFest on the 29th – 30th September 2014 in Korea.

Link zur Power Matters Alliance

Link zu Powermat

Laboratory test head supports develoment and certification of standards-compliant inductive transmission systems

Cable- and Contactless Charge-Management

Thanks to customer-specific development, it is usually possible to dispense entirely with a discrete charge regulator. In these cases, the wireless power receiver control both the energy transmission and the charging of the battery. Because there is an inherent galvanic isolation between the power transmitter and the receiver, a cost-intensive isolation transformer is also not required. In combination this makes it possible to produce wireless charging devices at similar costs as cable-bound chargers while substantially enhancing charging convenience.

Capacitive charging of a mobile measurement device

Wire- and Contactless Supply

In some applications capacitive energy transmission has advantages over inductive transmission. As, for example, the form of the electrodes can be very flexibly adapted, the possibilities for the design of the housings are practically unlimited. For this reason, alongside inductive energy transmission, etatronix also offers the development of capacitive transmission systems. This also involves the use of optimized resonance converters which in many cases achieve a higher efficiency than inductive transmission systems.

Simple to sterelize, medical application

Wire- and Contactless Supply

Seeing as etatronix offers the development of both standardized and customer-specific non-contact energy transmission systems, practically every customer requirement can be fulfilled. With specially adapted resonance transmitters etatronix achieves the inductive power transmission with the maximum possible efficiency while remaining below the specified limit values for electromagnetic compatibility. Depending on the distance to be bridged and the output power, total efficiencies of well over 90 % are possible.

Industrial, explosion prevented applications

Wired Charge-Management

The developments range from simple DC/DC converters and charge regulators to galvanically separated AC/DC and DC/DC converters right up to complete power management systems. We also offer the supply of an application from different sources. It is possible, for example, to provide the supply from a car battery and the alternative supply from the AC network, each with their own universal input. Feeding from a photovoltaic source with Maximum Power Point Tracking is also possible.

Charge-management of power tools



The etatronix Transmitter Tester is developed as an easy to use tool to allow manual testing of a wireless power transmitter according to a test procedure. The graphical user interface (GUI) allows the user to easily change the settings of the tester and test different scenarios, including a variation of modulation capacitors, modulation resistors as well as system loads without soldering. Each variation allows 256 different states and is possible on the fly. Additionally, the user can attach his own load to the output of the tester, allowing a test of the intended use case. To facilitate this further a programmable dc/dc converter is included giving the user the ability to set the required voltage level.

The exm module series provides easy to use plug and play solutions for high performance wireless power transmission between a power transmitter (Tx) and a power receiver (Rx). In combination with a proprietary data transmission channel, the series provides a fast regulation loop and the ability to transfer customer data in parallel. A LiIon charge function as well as a battery management system including a state of charge algorithm is available.

Compliance to global safety and EMC standards qualifies the series for worldwide markets.



Broadband Data Link

Broadband Data Link for Inductive Power Transfer Systems

Energy transfer by near-field coupling 2014

Publication about energy transmission systems and matching networks

A New Figure of Merit 2014

Artikel zu den neuen Systemgrößen Übertragungsgüte und -bandbreite

MEDengineering 2013

Overview of standardized and proprietary inductive power and signal transmission technologies

E&E Kompendium 2014

The article provides an overview of the ongoing standardization of non-contact energy transmission

Applied Power Electronics Conference 2013

Article on low-loss, synchronous rectification of a resonance transmitter


To maintain the technological leadership and provide customers the best and most innovative solution, etatronix is participating in numerous research projects in the area of wireless power transmission, battery management and high bandwidth data Transmission.

As an example, there is currently a project funded by the European Union within the framework of the European Regional Development Fund, where the battery management of a battery will be done by expanding our own firmware library, rather than through dedicated hardware components. This contributes to a reduction of total costs.