In our increasingly connected world, there is growing demand for simple to use, flexible data transmission and low energy consumption. ZF Switches & Sensors have developed an innovative wireless and batteryless Energy Harvesting Technology which can provide cost effective switching solutions in a wide range of environments and applications. Applications for using an Energy Harvesting Switch can be found in almost every market sector, including smart home, office, medical, industrial systems and building automation.
Designed for global use, the technology enables ZF to offer an excellent alternative to wired or battery-powered switching solutions. Compatible with multiple wireless protocols, the products are suitable for global use across countless markets and applications. As there is no need to change or dispose of batteries, the solution is both maintenance-free and environmentally friendly.
With no cabling to install Energy harvesting wireless switches can be mounted on almost any surface and are simple to relocate if required. The function of the switch may also be changed by reconfiguring the wireless output signal.
The ZF Energy Harvesting product portfolio includes a packaged hand operated rocker for applications including electrical appliances and an industrial snap-action switch for mechanical actuation by a machine or use as a proximity switch. A stand-alone generator for OEM design is also available.
Receivers to work with ZF wireless switch modules are available as either a self-contained packaged module suitable for DIN-Rail or wall-mounting with multiple output options (i.e. RS232, TTL), or as a hand soldered or SMD assembled “RF stamp” complete with wire antenna for OEM designs.
The very popular KNX intelligent building control system for residential and commercial environments is also supported. ZF offers the sole KNX-RF Energy Harvesting pushbutton module as well as a KNX pairing adapter and matching receiver (media coupler).
Activating any switch variant provides wireless data transfer, eliminating the need for expensive and complex cabling and increasing flexibility of use. Flexible pairing allows the operation of several switches with one receiver and vice-versa. Each switch has a “Unique ID” providing clear identification when operating several switches at once. Up to three “telegrams” are sent per actuation, with pseudo-random timing to assure robust data transmission.
Energy Harvesting Generator Technology overview
Based on the inductive principle, the direction change of the magnetic field in an inductive magnetic circuit transforms mechanical energy into the electrical energy required to send an RF signal from the patented Energy Harvesting Generator.
This technology is then packaged and assembled, together with an operating mechanism, resulting in the raw form of the standard product – the generator
The Energy Harvesting Generator is available separately for OEM applications with or without the RF electronics and integrated into ZF’s Energy Harvesting switch modules. It consists of a coil and a magnet block which is actuated when a mechanical force acts vertically on the end of the generator’s lever. A patented mechanism causes the magnetic block to move down abruptly (switching) and a positive pulse is created by reversing the polarity of the coil. When the lever is released, the system returns to the initial position (resetting) by means of the mechanism and a negative pulse is created. The energy produced is used to transmit a wireless signal indicating operation of the switch.
The initial energy pulse created provides the harvested electrical power output, which is then transformed and averaged over time by internal energy management components to create the supply voltage for the wireless transmitter. The small size, high efficiency and long life expectancy (up to 1,000,000 cycles) makes the product, in either form factor, ideal for installation in tight spaces without having to take in to consideration routine maintena
Overview of the Generator and RF Generator Module
In addition to pre-assembled switch modules for general HMI purposes use two switch modules have been designed specifically for building automation, a 1-way and a 2-way pushbutton
Key benefits of using energy harvesting powered switching systems include; wireless signal output, no power source or battery required, energy saving, low system installation and maintenance costs, flexible system design, long lifetime, simple installation, maintenance free and eco-friendly.
Typical applications include; smart home light switch or handheld controller, RF enabled bulb control, wall socket outlet or adapter control, window handle linked to room thermostat, building and office automation, industrial control limit switch, control pedal, emergency stop actuator, machine remote control.
ZF Switches & Sensors
Clare D’Arcy, UK Marketing
Tel. +44 (0) 7867 391670, Email clare.darcy@zf.com
Andreas Kohlmeyer, Head of Marketing Communications
Tel. +49 170 480 8875, E-Mail: andreas.kohlmeyer@zf.com
