Wireless power transmission

How it works

The principle of power transmission without electrical contact is already finding numerous applications in the field. One example is in so-called induction cook tops, where the energy is transmitted from the cooking zone to the bottom of the pot or pan in the form of an alternating electromagnetic field, only then becoming actual heat. The cook top itself stays cool.

Instead of converting the transmitted energy into heat, what if it would provide loss free electrical current from one object to another – without the two even touching each other? At the core of RRC’s wireless power transmission system is a sophisticated coil construction and activation technique which enables a highly efficient transfer. In contrast to traditional transformers, there are no closed cores for the coupling of the coils. Rather, the coils between which the energy flows are separated from one another, allowing energy to be transmitted across gaps of millimeters, or even centimeters. The resulting construction – consisting of independent sender and receiver modules – can be incorporated into a multitude of different devices where power can’t be supplied through external electrical contacts. The use of special ferrite materials leads to a more focused electromagnetic field, meaning an increase in efficiency and at the same time a reduced stray field.

Efficiency

The engineers at RRC have managed to substantially reduce energy loss, thus noticeably improving efficiency. In portable device such as a cell phone or notebook computer, 90% of the energy sent from the coils reaches the receiver. Minimal loss of energy and optimal efficiency are the prerequisites for this technology’s success. Less energy loss means less unwanted heat, which in turn means less effort spent on managing temperatures in the end-use application. Lowered energy consumption through more efficient products is also synonymous with sustainability and climate protection. This not only reflects the spirit of the times, but is also a key component of energy efficiency regulations in numerous industrial and economic areas. The wireless power transmission technologies developed by RRC facilitate compliance with the ecological design standards of worldwide standards, for example EnergyStar.

Safety

In the European Union products are only allowed to enter the market when they conform to all the applicable EU standards. Devices with inductive power transmission must comply with the limit values defined in 1999/519/EC under European conformity assessment procedures. These values are the result of over 20,000 cooperative studies carried out by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) and the World Health Organization (WHO), for the prevention of negative impacts caused by electromagnetic fields. Such strict electro smog regulations are tirelessly adhered to by RRC, ensuring its innovative power transmission technologies pose no risk to the consumer.

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