Compact electric motor e.g. for vehicle power steering or engine valve adjustment, has rotor shaft provided with section having high heat conduction coefficient for dissipating heat generated by motor

摘要

The electric motor has a housing (1) supporting a stator (2) and enclosing a rotor (3), mounted on a shaft (5) which is supported in bearings (12,13) at the ends of the housing. The shaft has a section (18) made from a material with a high heat conduction coefficient and a section (19) with a low heat conduction coefficient, each section associated with a respective shaft bearing. Also included are Independent claims for the following; (a) an application of an electric motor for a servo steering device; (b) an application of an electric motor for a valve setting drive for an IC engine