Thermoelectric transducer i.e. auxiliary power unit, for use as power source in electrically driven motor car to supply electrical power to electrical load, has electromagnetic devices provided in pistons

摘要

The transducer (100) has a piston (108) guided between an end region (104) and a center region (106) of a working chamber (102). Another piston is guided between another end region and the center region. Two bypasses are formed between a side of the end regions and the center region, respectively, where the side is turned towards the center region. Coil arrangements are arranged at an outer side of the chamber and attached to the pistons, respectively. An electronic device cooperates with the arrangements, and the pistons have electromagnetic devices and cores made of soft magnetic material.