Electromagnetic ultrasonic transducer

The present invention relates to an electromagnetic ultrasonic transducer for impinging ultrasonic waves upon a work piece which is made of an electrically-conductive material or for receiving ultrasonic waves. The transducer comprises a coil support, which is made of a material having good magnetic-conductivity and which has a comb-like structure having parallel running channels and fins as well as HF coils, which are electrically interconnected in series and which are wound onto at least some of the fins at a distance from the radiation side of the transducer formed by the faces of the fins and in such a manner that the adjacent coils have an alternating direction of wind. Furthermore, the ultrasonic transducer has means for generating a static magnetic field. The present invention relates to an electromagnetic ultrasonic transducer for generating horizontally polarized transverse waves. The transducer comprises a coil support () which is made of a material having good magnetic conductivity and which is provided with a comb-like structure having parallel running channels () and fins (). A plurality of HF coils () which are electrically interconnected in series are wound on at least some of said fins at some distance the faces of said fins () with adjacent coils () having an alternating direction of wind. In the channels () are arranged a plurality of rows () of permanent magnets () having alternating pole assignment.With the present ultrasonic transducer, in particular low-frequency SH waves can be generated in or receiving out of electrically conductive materials without the risk of wearing the HF coils.