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US 11,387,715 B2Granted
Switching device for switching an electric motor
AssigneeLock Antriebstechnik GmbH
InventorsFrank Lock, Patrick Niederer, Tobias Fluhr
Life of this patent
Estimating the term…
Abstract
A switching device for switching an electric motor, where the switching device is arranged on a component which is driven in rotation by the motor. The switching device is characterized in that a contactless, absolute position-measuring device, an evaluation unit for evaluating position signals and an output unit for outputting switching information for indirectly switching and/or directly switching the motor current as a function of a position signal are provided within a single housing.
Claims12
A geared motor comprising:
- an electric motor;
- a transmission;
- a drive shaft;
- and
- a switching device,
- wherein the transmission rotates the drive shaft via rotation of the electric motor,
- wherein the switching device is arranged on the drive shaft, the switching device comprising
- a single housing, which is distinct from an electric motor housing and a transmission housing, and which is spatially separated from at least one of the electric motor housing and the transmission housing,
- a contactless, absolute position-measuring device provided within the single housing and sensing a position of the drive shaft absolutely,
- an evaluation unit provided within the single housing and evaluating position signals,
- a gearwheel coupled to the drive shaft,
- an output unit provided within the single housing and outputting switching information for indirectly switching and/or directly switching a motor current of the electric motor as a function of a position signal, and
- an internal electrical system, provided within the single housing and providing internal power, in an absence of external power, to at least the position measuring device to sense at least one of (1) a single complete rotation of the drive shaft, (2) a plurality of rotations of the drive shaft, and (3) the position of the drive shaft,
- wherein the switching device is configured to switch the electric motor,
- wherein the switching device is coupled by the gearwheel of the position measuring device to a pinion defined on an outer peripheral surface of the drive shaft, and
- wherein the pinion and the drive shaft both rotate about the same axis of rotation.
13 more elements
A geared motor comprising:
- an electric motor;
- a transmission;
- a drive shaft;
- and
- a switching device,
- wherein the transmission rotates the drive shaft via rotation of the electric motor,
- wherein the switching device is arranged on the drive shaft, the switching device comprising
- a single housing, which is distinct from a transmission housing, and which is at least partially provided within the transmission housing,
- a contactless, absolute position-measuring device provided within the single housing and sensing a position of the drive shaft absolutely,
- an evaluation unit provided within the single housing and evaluating position signals,
- a gearwheel coupled to the drive shaft,
- an output unit provided within the single housing and outputting switching information for indirectly switching and/or directly switching a motor current of the electric motor as a function of a position signal, and
- an internal electrical system, provided within the single housing and providing internal power, in an absence of external power, to at least the position measuring device to sense at least one of (1) a single complete rotation of the drive shaft, (2) a plurality of rotations of the drive shaft, and (3) the position of the drive shaft,
- wherein the switching device is configured to switch the electric motor,
- wherein the switching device is coupled by the gearwheel of the position measuring device to a pinion defined on an outer peripheral surface of the drive shaft, and
- wherein the pinion and the drive shaft both rotate about the same axis of rotation.
13 more elements
Dependencies are inferred from the claim text.