Electronically commutated, collectorless direct-current motor
First Claim
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1. An electronically commutated, collectorless direct current motor comprising, in combination:
- a stator comprised of an external magnetic yoke, a stator winding and an internal magnetic yoke;
a rotor rotationally arranged between the stator winding and the internal magnetic yoke, the rotor being a permanent magnet rotor and designed in the form of a cup-shaped hollow cylinder comprised of a non-magnetic material and mechanically connected to a motor shaft;
an insulating body employed in the fabrication of the stator winding, said insulating body having a first side and a second side;
a disk-shaped ring connected to said insulating body and having a plurality of annularly arranged, axially extending slotted portions on said first side, the number of said slotted portions being a multiple of the number of pole pairs of said motor;
a pair of sidewalls mechanically connected to each of said slotted portions for structurally supporting a plurality of phase windings of the stator winding outside each slotted portion and between said sidewalls of adjacent slotted portions and on a portion of a tubular section of said first side; and
a slot-shaped opening formed within each of said slotted portions between each pair of sidewalls for receiving one of a plurality of teeth of said external magnetic yoke for completing the magnetic circuit of the stator, the second side of said insulating body further including a plurality of openings communicating with a plurality of vertically directed slots and a plurality of bridges in said disk-shaped ring for providing a distribution path for said phase windings.
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Abstract
An electronically commutated, collectorless direct current motor having a permanent magnet rotor comprised of a cup-shaped hollow cylinder in whose interior an internal magnetic yoke is arranged, an internal stator core and an external stator core. A stator drum winding comprises a plurality of phase windings wound on an insulating body with a portion of the stator winding being commingled with the phase windings in a plurality of slots of a slotted stator. The insulating body has a novel shape for arranging the stator winding thereon and for inserting the insulating body into a plurality of slots of the external stator core.
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Citations
18 Claims
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1. An electronically commutated, collectorless direct current motor comprising, in combination:
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a stator comprised of an external magnetic yoke, a stator winding and an internal magnetic yoke; a rotor rotationally arranged between the stator winding and the internal magnetic yoke, the rotor being a permanent magnet rotor and designed in the form of a cup-shaped hollow cylinder comprised of a non-magnetic material and mechanically connected to a motor shaft; an insulating body employed in the fabrication of the stator winding, said insulating body having a first side and a second side; a disk-shaped ring connected to said insulating body and having a plurality of annularly arranged, axially extending slotted portions on said first side, the number of said slotted portions being a multiple of the number of pole pairs of said motor; a pair of sidewalls mechanically connected to each of said slotted portions for structurally supporting a plurality of phase windings of the stator winding outside each slotted portion and between said sidewalls of adjacent slotted portions and on a portion of a tubular section of said first side; and a slot-shaped opening formed within each of said slotted portions between each pair of sidewalls for receiving one of a plurality of teeth of said external magnetic yoke for completing the magnetic circuit of the stator, the second side of said insulating body further including a plurality of openings communicating with a plurality of vertically directed slots and a plurality of bridges in said disk-shaped ring for providing a distribution path for said phase windings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification