High resolution rotation angle sensor for DC motor

摘要

The high resolution rotation angle sensor device has a fixed sensor element (25) associated with a magnetized region (24) on a driven element (19) and a circuit (30) with controllable switch elements at which a current-dependent first or second measurement voltage (39,40) can be picked up. The sensor element is in the form of an anisotropic magnetoresistive sensor AN Independent claim is also included for the following: (a) a method of determining the revolution rate and rotation angle of a gearbox drive unit with a D.C. motor.