Device having two parts being moveable with respect to another and an arrangement for simultaneous transmission of energy and information between these parts

The device has contactless inductive coupling for simultaneously transferring electrical energy and/or information between two relatively movable parts with a common primary coil arrangement and a secondary coil arrangement, a PWM supply stage connected to the primary coil arrangement with preselected clock frequency and duty cycle and an arrangement for modifying the signals produced by the supply stage depending on the data to be transferred. The device has a contactless inductive coupling for simultaneously transferring electrical energy and/or information between two relatively movable parts with a common primary coil arrangement on one part and a secondary coil arrangement on the other part, a pulse width modulation supply stage connected to the primary coil arrangement with preselected clock frequency and duty cycle and an arrangement (71,72) for modifying the signals produced by the supply stage depending on the information to be transferred. AN Independent claim is also included for the following: (a) a circular needle machine with an inventive device.