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US 2017/0250637 A1Published application
Axial Brushless DC Motor with Fractional and Hold Step Function
AssigneeCTS Corporation
InventorsYulanda King, Scott Calkins
Life of this patent
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Abstract
An axial brushless DC motor comprising a stator including a plurality of coils, a rotor including a magnet with a plurality of pairs of magnetic poles and adapted for movement relative to the stator in one or more full steps, and a coil phase circuit adapted for moving the rotor relative to the stator a fractional step less than the one or more full steps and/or holding the rotor at the fractional or one or more full steps.
Claims12
An axial brushless DC motor comprising:
- a stator including a plurality of coils;
- a rotor including a magnet with a plurality of pairs of magnetic poles and adapted for movement relative to the stator in one or more full steps;
- and
- a coil phase circuit adapted for moving the rotor relative to the stator a fractional step less than the one or more full steps and/or holding the rotor at the one or more fractional or full steps.
1 more element
An axial brushless DC motor comprising:
- a stator including a plurality of coils;
- a rotor including a magnet with a plurality of pairs of magnetic poles and adapted for movement relative to the stator in full step positions;
- and
- a coil phase circuit including first, second, and third coil phase segments connected in series at a common central connection point, each of the coil phase segments including a pair of coils configured in parallel, and current being adapted for flow through the coil phase circuit in a manner adapted to switch the orientation of one or more of the plurality of pairs of magnetic poles of the magnet for moving the rotor relative to the stator a fractional step position less than the full step position and/or holding the rotor at the fractional step position or full step position.
1 more element
An axial brushless DC motor comprising:
- a stator including a plurality of coils;
- a rotor including a magnet and adapted for movement in full or fractional step position relative to the stator;
- a coil phase circuit including first, second, and third coil phase segments coupled together in series at a common central connection point, each of the first, second, and third coil phase segments including a pair of coils coupled in parallel, and energizable for moving the rotor between a first driving position and full or fractional step hold positions relative to the stator.
Dependencies are inferred from the claim text.