Siemens Aktiengesellschaft

Detlef Potoradi

Rolf Vollmer

Hubert Schierling

Erich Bott

Holger Schunk

Matthias Braun

Tabea Arndt

Markus Reinhard

Jörg Grotendorst

Klemens Kahlen

Dirk Van Riesen

An articulation for a robot, in particular a collaborative robot, includes as components a drive, a transducer for providing information relating to a rotational speed, commutation and/or position, and a plurality of heat exchanger tubes for removing heat from the components, with a first one of the heat exchanger tubes touching a first subset of the components, and with a second one of the heat exchanger tubes touching a second subset of the components.

Articulation for a robot

The aim of the invention is to provide an electric motor which has a high torque at low rotation speeds and a high power at high rotation speeds. The invention therefore proposes an electric motor with permanent-magnet excitation having a first active part (), which is fitted with permanent magnets (), and a second active part (), which can be moved in relation to the first active part () by magnetic force of the permanent magnets (). The electric motor also has a heating device () with which the magnetic field of at least one of the permanent magnets () can be weakened by heating the permanent magnets as a function of a speed of the first active part () in relation to the second active part ().

Permanent-magnet-excited electric motor with heating device, and operating method

The aim of the invention is to create a combined linear-rotary drive that has a compact, simple, and inexpensive design. Said aim is achieved by a combined drive comprising a linear driving device () and a rotary driving device (), at least one of the two driving devices being provided with a hybrid reluctance motor. It is particularly advantageous to embody both driving devices as hybrid reluctance motors such that the rotor () can be produced at a low cost without permanent magnets in addition to ensuring that the drive has a very compact design.

Combination drive with a hybrid reluctance motor

The invention relates to a cooling device () pertaining to an electrical machine (), said cooling device () comprising at least one rod-shaped heat-conducting means () for heat-conductive connection to the electrical machine (). The invention also relates to an electrical machine () comprising a housing () and/or a stator (), said housing () and/or stator () being applied to a cooling device () comprising a rod-shaped heat-conducting means () extending axially in relation to the electrical machine. Said heat-conducting means () is to be received by the stator () and/or the housing () or arranged on the stator () and/or the housing ().

Cooling device of an electrical machine

To reduce the torque ripple of permanent-magnet excited synchronous motors () having tooth coils (), constructive means are proposed for damping or eliminating the fifth and/or seventh harmonic wave of the rotor field which mainly cause torque ripple.

Permanent-magnet excited synchronous motor

An electric machine includes a stator and a rotor which is spaced from the stator at formation of an air gap therebetween. In order to cool down heat-generating components of the stator and the rotor, the electric machine is provided with a cooling system which includes heat pipes placed in proximity of the heat-generating components.

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Bad Neustadt/Saale, Germany

Detlef Potoradi