Integrated Sensing and Harvesting with Wiegand

Energy harvesting by the Wiegand effect has been used successfully in over a million devices, including water and gas meters and industrial encoders (rotation measurement instruments). Here, the polarity reversals are triggered by a rotating permanent magnet, resulting in a rotation counter system that is entirely self-powered, with no need for external power sources or batteries.

POSITAL’s absolute multiturn encoders integrate an energy harvesting system based on the Wiegand Effect which requires no batteries or gears. This eradicates the disadvantages of using batteries; e.g. limited lifespan requiring replacement or maintenance, considerable weight, and harmful constituent substances.

By combining the timing of the event-triggered pulses with ultra-low power counting electronics, a Wiegand-powered counting system can be realised. Such systems allow for the accurate management of maintenance cycles even in situations where external power supply is difficult or disadvantageous.