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.

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.

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.

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.

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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.

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.

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.

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.