Rotary actuating drive and rotary switch
AssigneeRobert Bosch GmbH
InventorEckart Hettlage
Life of this patent
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Abstract
To simplify the design of a rotary actuator, in particular for an “R”-type waveguide switch, having a permanently magnetized rotor and a plurality of stator windings surrounding the rotor in a rim-like fashion, for generating magnetic fields which place the rotor in one of a first plurality of positions, it is proposed to finish the actuator with elements for exerting a corrective torque on the rotor, the elements placing the rotor, in the currentless state of the stator windings, in a target position of a second plurality of positions, each position of the first plurality having assigned to it a target position.
Claims12
A rotary actuator, comprising:
- a permanently magnetized rotor;
- a plurality of stator windings surrounding the permanently magnetized rotor in a rim-like fashion and for generating a magnetic field, the stator windings placing the permanently magnetized rotor in one of a first plurality of positions, wherein the stator windings are coplanar and arranged so as to be unpaired;
- an arrangement for exerting a corrective torque on the permanently magnetized rotor, the arrangement for exerting the corrective torque, in a currentless state of the stator windings, placing the permanently magnetized rotor in a target position of a second plurality of positions, each position of the first plurality of positions having assigned thereto a corresponding one of the second plurality of positions as the target position;
- and
- a network having n inputs and m outputs, n being a number of the first plurality of positions and m being a number of the stator windings, wherein:
- each one of the stator windings is connected to one of the m outputs, and
- the network distributes to the stator windings a current applied at one of the n inputs in order to set one of the first plurality of positions that is assigned to a respective one of the n inputs.
A rotary switch, comprising:
- a rotary actuator that includes:
- a permanently magnetized rotor;
- a plurality of stator windings surrounding the permanently magnetized rotor in a rim-like fashion and for generating a magnetic field, the stator windings placing the permanently magnetized rotor in one of a first plurality of positions, wherein the stator windings are coplanar and arranged so as to be unpaired;
- an arrangement for exerting a corrective torque on the permanently magnetized rotor, the arrangement for exerting the corrective torque, in a currentless state of the stator windings, placing the permanently magnetized rotor in a target position of a second plurality of positions, each position of the first plurality of positions having assigned thereto a corresponding one of the second plurality of positions as the target position;
- and
- a network having n inputs and m outputs, n being a number of the first plurality of positions and m being a number of the stator windings, wherein:
- each one of the stator windings is connected to one of the m outputs, and
- the network distributes to the stator windings a current applied at one of the n inputs in order to set one of the first plurality of positions that is assigned to a respective one of the n inputs.
Dependencies are inferred from the claim text.