Festool Gmbh

Patrick Schön

Volker Barth

Markus With

A drive motor () for a vacuum cleaner or a machine tool, wherein the drive motor () includes a stator () with a stator coil arrangement (), and a rotor () wherein a sensor arrangement () is arranged in a stationary manner with respect to the stator in order to detect a respective angle of rotation position of the rotor () with respect to the stator, said sensor arrangement comprising at least two sensors (A,C). It is provided that the at least two sensors are configured to detect two waves of a magnetic rotating field (FB) of the rotor () wherein the sensors generate the switching signals in a manner dependent on a wave of the magnetic rotating field (FB) exceeding or undershooting a switching threshold (SH, SL) of the sensor (A,C).

Drive motor for a vacuum cleaner or a machine tool

A drive motor for a suction device () or a machine tool in the form of a hand-held power tool () or a semi-stationary machine tool. The drive motor () has a stator () with an excitation coil assembly () and a rotor () with a motor shaft () which is rotatably mounted about a rotational axis (D) on the stator or relative to the stator () by means of a bearing assembly (A) and which passes through a shaft through-opening () of a laminated core () held on the motor shaft (). The rotor () has a magnet assembly () with at least one permanent magnet such that the rotor () can be rotated about the rotational axis (D) by energizing the excitation coil assembly (). The laminated core () has at least one balancing section () produced by removing material from or notching the laminated core (), and/or the at least one permanent magnet is formed by a magnet body () which is magnetized when arranged on the laminated core ().

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Wendlingen, Germany

Patrick Schön