SENSOR DEVICE FOR AN ELECTRIC MACHINE
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Accused Products
Abstract
The aim of the invention is to create an inexpensive sensor system for a movable electric machine in order to determine positions, the sensor signal featuring zero crossings. Said aim is achieved by a sensor device (1) comprising a U-shaped yoke (3) and a sensor (10) which is disposed in/on the yoke (3) to detect a magnetic variable, for example. Magnets (6 to 9) that are or can be inversely magnetized are arranged at a free end of the yoke (3). Opposite magnetic fluxes that can be detected by the sensor (10) can be generated in the yoke (3) in accordance with the position of the magnets (6 to 9) relative to one of the pole teeth (11, 12, 13) of a machine component. Approximately sinusoidal sensor signals can be generated therefrom without having to use several measuring sensors, e.g. in order to regulate a linear motor.
41 Citations
39 Claims
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1-16. -16. (canceled)
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17. A sensor device for detecting a position or a movement relative to a machine component of an electric machine having pole teeth, the sensor comprising:
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a U-shaped yoke section having opposing free ends, and a sensor arranged in or on the yoke section for measuring a magnetic variable, and two magnets having opposite polarity arranged on a free end of the yoke section and producing in the yoke section a magnetic flux depending on a position of the two magnets in relation to an opposing pole tooth, with a flux direction in the yoke section depending on the polarity of the magnet that opposes the pole tooth. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A sensor device for detecting a position or a movement relative to a machine component of an electric machine having pole teeth, the sensor comprising:
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a U-shaped yoke section having opposing free ends, and a magnet device arranged in or on the yoke section for producing in the yoke section a magnetic flux having a flux direction, and a sensor having two sensor elements arranged on a free end of the yoke section for measuring a magnetic variable, wherein the two sensor elements produce for a given magnetic flux direction in the yoke section voltages of different polarity in the two sensor elements, with a magnitude of the produced voltages depending on a position of the sensor elements in relation to an opposing pole tooth. - View Dependent Claims (26, 27, 28, 29)
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30. A sensor device for detecting a position or a movement relative to a machine component of an electric machine having pole teeth, the sensor comprising:
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an E-shaped yoke having center limb and being symmetrically split along the center limb into two yoke parts transversely to a movement direction, a sensor arranged in the center limb between the two yoke parts for measuring a magnetic variable, and a magnet bridging free ends of the center limb. - View Dependent Claims (31, 32, 33)
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34. An electric machine comprising a sensor device for detecting a position or a movement relative to a machine component of the electric machine having pole teeth, the sensor comprising:
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a U-shaped yoke section having opposing free ends, and a sensor arranged in or on the yoke section for measuring a magnetic variable, and two magnets having opposite polarity arranged on a free end of the yoke section and producing in the yoke section a magnetic flux depending on a position of the two magnets in relation to an opposing pole tooth, with a flux direction in the yoke section depending on the polarity of the magnet that opposes the pole tooth. - View Dependent Claims (35)
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36. An electric machine comprising a sensor device for detecting a position or a movement relative to a machine component of an electric machine having pole teeth, the sensor comprising:
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a U-shaped yoke section having opposing free ends, and a magnet device arranged in or on the yoke section for producing in the yoke section a magnetic flux having a flux direction, and a sensor having two sensor elements arranged on a free end of the yoke section for measuring a magnetic variable, wherein the two sensor elements produce for a given magnetic flux direction in the yoke section voltages of different polarity in the two sensor elements, with a magnitude of the produced voltages depending on a position of the sensor elements in relation to an opposing pole tooth. - View Dependent Claims (37)
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38. An electric machine comprising a sensor device for detecting a position or a movement relative to a machine component of an electric machine having pole teeth, the sensor comprising:
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an E-shaped yoke having center limb and being symmetrically split along the center limb into two yoke parts transversely to a movement direction, a sensor arranged in the center limb between the two yoke parts for measuring a magnetic variable, and a magnet bridging free ends of the center limb. - View Dependent Claims (39)
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Specification