Electric machine with a stator having slots at the tooth for reducing the fundamental wave of the magnetic flux
First Claim
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1. An electric machine comprising:
- a stator including slots for receiving electric windings, teeth of the stator being formed between adjacent slots, respectively; and
a rotor movable relative to the stator, wherein, during operation, an operating wave of a magnetomotive force is different from a fundamental wave of a magnetic;
flux, wherein the stator comprises at least one recess which extends substantially in a radial direction from a periphery of the stator into a respective tooth of the stator to a portion of the respective tooth proximate the rotor, wherein the stator corn rises at least one tooth without the at least one recess, wherein the at least one recess is formed such that a first harmonic wave of the magnetomotive force used as the operating wave is greater than a second harmonic wave of the magnetomotive force used as the operating wave without the at least one recess, wherein the electric machine is not a step motor, and wherein the at least one recess forms a mechanical barrier for reducing the fundamental wave of the magnetic flux and for increasing the operating wave.
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Abstract
The invention relates to an electric machine comprising a stator and a rotor moveable relative to the stator. The stator has slots for accommodating electrical windings, wherein teeth of the stator are formed between adjacent slots. During operation of the machine, an operating wave of the magnetomotive force is different from a fundamental wave of the magnetic flux. The stator comprises at least one recess which is arranged in the tooth region and extends substantially in the radial direction.
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16 Claims
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1. An electric machine comprising:
- a stator including slots for receiving electric windings, teeth of the stator being formed between adjacent slots, respectively; and
a rotor movable relative to the stator, wherein, during operation, an operating wave of a magnetomotive force is different from a fundamental wave of a magnetic;
flux, wherein the stator comprises at least one recess which extends substantially in a radial direction from a periphery of the stator into a respective tooth of the stator to a portion of the respective tooth proximate the rotor, wherein the stator corn rises at least one tooth without the at least one recess, wherein the at least one recess is formed such that a first harmonic wave of the magnetomotive force used as the operating wave is greater than a second harmonic wave of the magnetomotive force used as the operating wave without the at least one recess, wherein the electric machine is not a step motor, and wherein the at least one recess forms a mechanical barrier for reducing the fundamental wave of the magnetic flux and for increasing the operating wave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- a stator including slots for receiving electric windings, teeth of the stator being formed between adjacent slots, respectively; and
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16. An electric machine comprising:
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a stator including slots for receiving electric windings, teeth of the stator being formed between adjacent slots, respectively; and a rotor movable relative to the stator, wherein, during operation, an operating wave of a magnetomotive force is different from a fundamental wave of a magnetic flux, wherein the stator comprises at least one recess which extends substantially in a radial direction from a periphery of the stator into a respective every other tooth of the stator to a portion of the respective every other tooth proximate the rotor, wherein the at least one recess is formed such that a first harmonic wave of the magnetomotive force used as the operating wave is greater than a second harmonic wave of the magnetomotive force used as the operating wave without the at least one recess, wherein the electric machine is not a step motor, and wherein the at least one recess forms a mechanical barrier for reducing the fundamental wave of the magnetic flux and for increasing the operating wave.
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Specification