System for a machine having a large number of proximity sensors, as well as a proximity sensor, and a primary winding for this purpose

The invention relates to a system for a machine having a large number of proximity sensors, as well as to a proximity sensor, and a primary winding for this purpose. The invention can be used for supplying electrical power to proximity sensors that are mounted on moving machine components (e.g. industrial robots, automatic production machines, and automated production machines). A system for a machine, in particular an automated production machine, has a large number of proximity sensors. Each proximity sensor has at least one secondary winding that is suitable for drawing power from a medium-frequency magnetic field. At least one primary winding, which is fed from a medium-frequency oscillator, is provided for supplying the proximity sensors with electrical power without using wires. Each proximity sensor is equipped with a transmitting device that emits radio signals, which contain sensor information of interest, to a central receiving device that is connected to a process computer for the machine. A proximity sensor and a primary winding for this purpose are also proposed.