Electromoter having a position sensor with a plurality of field sensitive elements on a semiconductor chip

A brushless electromotor comprising:

• a rotor having a permanently magnetized propulsion magnetization zone with at least one pair of magnetic poles,
• a stationary coil assembly with at least one stator coil, said rotor being rotationally movable by magnetic fields of said at least one stator coil, said rotor having a permanently magnetized measuring magnetization zone;
• and
• a sensor disposed in the range of the magnetic field of said measuring magnetization zone, said sensor comprising an arrangement of at least five field-sensitive elements which are sensitive to the magnetic field and are integrated on a semiconductor chip in a row and are each coupled to circuitry on said semiconductor chip, with at least four of said field-sensitive elements covering a period of the measuring magnetization and with at least one of said field-sensitive elements being a redundant field-sensitive element arranged outside said period of the measuring magnetization, and in which said at least five field-sensitive elements cover more than one period of the measuring magnetization, so that a position of the rotor can be determined with high precision from an output signal of said field-sensitive elements, which is generated by the action of the magnetic field of the measuring magnetization zone, by numeric correlation of the measuring signals with a predetermined reference curve corresponding to one or several period(s), wherein a total number of said field-sensitive elements is equal to an integral power of two plus at least 1 redundant field-sensitive element and wherein a number of said redundant field-sensitive elements is from 10% to 50% of said integral power of two.