Electric power divider of hybrid car propulsion systems

The paper deals with the power splitting synchronous permanent magnet generator used in hybrid electric cars. The synchronous permanent magnet generator is special electric double rotor generator which acts as power divider. This special electric machine concentrates planetary gear and electric generator, known from other solutions, into one special electric double rotor machine. The paper deals with this new machine from the point of view of its efficiency. The usage of this splitter device in hybrid electric drives is described. Important feature of this power splitter is its efficiency. Therefore laboratory measurements were performed. Results and their discussion are presented. Experimental results give very good efficiency of this power splitter in broad range of differential revolution of both rotors. The efficiency lies between 87 and 98 %.