High-speed rotating electrical machine - has trapezium voltage induced in stator winding by permanent-magnetic rotor by appropriate choke of pole width and winding depth

摘要

The rotating machine has a polyphase slotless winding on a ferroplastic soft-magnetic stator. The rotor has permanent magnets generating a magnetic field in the region of the winding such that the section of the n-phase winding have a trapezium-shaped voltage induced in them whose flat top is constant in amplitude over a range equal to or greater than 360 deg. elmn. The magnetic field is defined by approximately choosing the ratio of the average pole width (b) of the permanent magnets to the winding depth (h). This ratio is approx.