Pulsed multi-rotor constant air gap switched reluctance motor
First Claim
1. An electric motor, comprising:
- a plurality of motor segments, each segment comprising;
a stator, having stator poles and stator windings anda rotor having a flux path element, said flux path element being attached to a rotor shaft at an oblique angle to the longitudinal axis of said shaft and having a shape that provides a uniform air gap with said stator poles when said shaft is rotated;
wherein said rotor shafts of said motor segments are mechanically coupled to each other.
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Accused Products
Abstract
An electric motor with two or more stator sections, each possessing at least two salient pole projections having power windings, and two or more armature sections on a common shaft. The armature sections are at an angle to each other: e.g. 90 degrees for two armatures, 120 degrees for three armatures. Each armature has a lamination stack or ferrite core. The armature sections form a constant air gap with the field poles, and have an elliptical profile with respect to the output shaft. The armature sections have no electrical windings, or conductors and require no slip rings, rotor coils or permanent magnets. The power windings are energized by pulses of electric current. Said pulses are automatically supplied to the salient pole nearest the longest rotor flux path available, as determined by a shaft position sensor.
30 Citations
20 Claims
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1. An electric motor, comprising:
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a plurality of motor segments, each segment comprising; a stator, having stator poles and stator windings and a rotor having a flux path element, said flux path element being attached to a rotor shaft at an oblique angle to the longitudinal axis of said shaft and having a shape that provides a uniform air gap with said stator poles when said shaft is rotated; wherein said rotor shafts of said motor segments are mechanically coupled to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electric motor comprising:
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a stator, comprising at least four stator poles, and stator windings; a rotor having a flux path element attached to a rotor shaft at an oblique angle relative to the longitudinal axis of the shaft, the flux path element shaped to provide a uniform, constant dimension air gap between the flux path element and the stator pole; and an angular transducer positioned to provide a signal indicative of the rotor shaft position. - View Dependent Claims (14, 15, 16)
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17. A rotor assembly for use in an electric motor comprising:
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a flux path element shaped to produce a section of a right circular cylinder canted at an angle with respect to a rotor shaft; counter weights mounted to the rotor shaft at locations that enable a smooth rotary motion of the rotor shaft; and a shaft position indicator mounted to the rotor shaft. - View Dependent Claims (18, 19)
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20. An electric motor comprising:
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a stator, comprising at least two stator poles, and stator windings; a rotor having a flux path element attached to a rotor shaft at an oblique angle relative to the longitudinal axis of the shaft, the flux path element shaped to provide a uniform, constant dimension air gap between the flux path element and the stator pole; and an angular transducer positioned to provide a signal indicative of the rotor shaft position.
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Specification