POSITION SENSOR OF ROTOR OF ELECTRIC MOTOR Russian patent published in 2009 - IPC H02K29/08 H02K29/06 

FIELD: electrical engineering.

SUBSTANCE: present invention relates to electrical engineering and is meant for use in ac electronic motors and ac electronic-inductor motors. According to the invention, the position sensor of the rotor of an electric motor has a static stator (1), rigidly joined to the stator of the electric motor, magnetosensitive elements 2), (3), (4), in form of Hall sensors or magnetoresistors, for example a rotor (5), made from magnetic insulating material and kinematically linked to the rotor of the electric motor, a ferromagnetic disc (6) with openings and circular permanent magnets (7) and (8), magnetised axially. In this design of the sensor, two permanent magnets are used, common for all detecting elements and rigidly fixed to the shaft of the rotor together with a magnetically conductive disc. The field of the permanent magnets is distributed to Hall sensors through the magnetically conductive disc and an air gap. As a result sensitivity of the sensor to movement of detecting elements about the magnets is reduced, as well as to non-uniformity of the permanent magnets.

EFFECT: simple design and increased accuracy of the position sensor of the rotor of an electric motor.

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