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Sensor device for an electric machine

A sensing device and sensor technology, which is applied in the use of electric/magnetic devices to transmit sensing components, measuring devices, and converting sensor outputs, etc., can solve the problems of adjustment equipment failure, inability to perform optical measurement, and high implementation costs.

Inactive Publication Date: 2009-04-22
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of optical measurement, however, are the high cost of implementation and the high susceptibility to contamination of the linear motor or its surroundings or the impossibility of optical measurement, which leads to failure of the regulating device

Method used

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  • Sensor device for an electric machine
  • Sensor device for an electric machine
  • Sensor device for an electric machine

Examples

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Embodiment Construction

[0030] The examples to be described in detail below are preferred embodiments of the present invention. The embodiments relate to linear motors, but can be transferred analogously to rotary motors, especially torque motors.

[0031] figure 1 The shown longitudinal partial section of the linear motor shows a section of the sensor head 1 or primary part and the secondary part 2 . The primary part 1 has a substantially U-shaped yoke 3 . On the free ends 4 and 5 of the yoke 3 are arranged permanent magnets 6 , 7 , 8 and 9 serving as pole teeth. All permanent magnets 6 to 9 are polarized in the direction from sensor head 1 to secondary part 2 or in the opposite direction. Arranged on each of the free ends 4, 5 are two permanent magnets 6, 7 and 8, 9, polarized in opposite directions and parallel to each other.

[0032] A Hall sensor 10 is arranged in the yoke 3 between the two free ends 4 and 5 . Hall sensor 10 divides yoke 3 into two halves, if necessary.

[0033] The second...

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PUM

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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.

Description

technical field [0001] The invention relates to a sensor device for an electric machine with a motor component equipped with pole teeth, the sensor device for detecting a movement relative to the motor component. The sensing device is equipped with a U-shaped or E-shaped magnetic yoke and a sensor, and the sensor is arranged in / on the magnetic yoke for detecting the magnetic value. Background technique [0002] This type of sensing device is applicable to any kind of motor such as DC motors, AC motors and three-phase AC motors. Here, a sensor arrangement of this type is also suitable for both rotary and linear motors. In particular, when rotating a rotary motor by a specific rotation angle or moving a linear motor by a specific distance, it is necessary to measure the current rotation angle or the current distance. This measurement should be as precise as possible, so that the corresponding angle of rotation or the corresponding distance can be turned precisely and quickly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/20
CPCG01D5/2046G01D5/147G01D2205/40
Inventor 罗兰·芬克勒泽尔杰科·杰蒂克马库斯·诺尔
Owner SIEMENS AG
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