Minebea Company, Limited

Hubert Hauser

Guido Schmid

Norbert Irmer

Hermann Flammer

Uwe Moench

Eduard Hudec

A device to press a rotatably supported shaft of a rotor of a spindle motor for a hard disk drive into a shaft receiving portion of an associated stator housing by means of a first pressing tool acting on the rotor and a second pressing tool acting on the stator housing. A first aligning apparatus for the rotor and a second aligning apparatus for the stator housing are provided. The first and second aligning apparatuses are formed in such a way that they guide the rotor by means of a rotor carrier and the stator housing by means of a stator carrier. The rotor carrier and the stator carrier are exactly aligned with respect to each other during the pressfitting process. The first pressing tool has a first pressing element acting on the shaft of the rotor that is independent of the first aligning apparatus and the second pressing tool has a second pressing element acting on the stator housing that is independent of the second aligning apparatus. The first and second pressing elements abut against the shaft or the stator housing respectively, at the latest at the start of the pressfitting process.

Device to press the shaft of a rotor into a stator housing

A torque measuring device for electric motors having a rotor and a stator is proposed, said apparatus comprising a holding apparatus to hold the stator non-rotatably, an eddy current brake device which can be used to brake the rotor and a torque sensor connected to the eddy current brake device.

Torque measuring device for electric motors and method to measure the torque of an electric motor

A measuring method to determine the noise emission of an electric motor is proposed in which the vibrational excitation of the running electric motor is measured by a laser vibrometer device and this measured vibrational excitation is correlated with a noise level.

Measuring method to determine the noise emission of an electric motor and measuring device

A device for measuring torque on an electric motor, which has a first motor portion and a second motor portion, which are rotatable in relation to each other, is proposed, the device comprising a rotatable holding plate for receiving the first motor portion, by means of which plate a rotational movement of the first motor portion in relation to the second motor portion can be driven, and a holding device for the second motor portion for holding the second motor portion in a rotationally fixed manner, the holding plate being disposed and formed in such a way that, when external forces are exerted on the electric motor via the holding device, the electric motor can position itself in relation to the holding device in such a way that external forces influencing the torque measurement are minimized.

Device and method for measuring torque on an electric motor

A torque measuring device for electric motors comprising a stator and a rotor is disclosed in which a holding apparatus to hold the stator of a test electric motor is provided, a drive apparatus for the rotor is provided and a torque sensor that is coupled to the drive apparatus is provided.

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Balgheim, Germany

Hubert Hauser