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Encoder, electromechanical device, robot and railway vehicle

A technology of electromechanical devices and encoders, applied in the field of encoders, can solve the problems of difficult precision of magnetic impedance pattern impedance, limited detection accuracy of rotation angle, etc.

Inactive Publication Date: 2015-09-23
GK BRIDGE 1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional encoder described above, since the magnetic field is detected using the magneto-impedance pattern, the detection accuracy of the rotation angle is limited by the precision of the impedance of the magneto-impedance pattern.
In general, it is difficult to improve the precision of the impedance of the magneto-impedance pattern

Method used

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  • Encoder, electromechanical device, robot and railway vehicle
  • Encoder, electromechanical device, robot and railway vehicle
  • Encoder, electromechanical device, robot and railway vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0067] A. First Embodiment (Rotary Encoder)

[0068] figure 1 It is an explanatory diagram showing the configuration and operation of a rotary encoder 100A according to the first embodiment. like figure 1 As shown in (A) and (B), this rotary encoder 100A has a ring-shaped first magnet body 110 and a second magnet body 210 arranged inside the first magnet body 110 . In addition, there is a first 2-axis magnetic sensor circuit 130 provided along the outer circumference of the first magnet 110 with a certain gap from the surface of the first magnet 110, and a certain gap from the surface of the second magnet 210. The second 2-axis magnetic sensor circuit 230 is provided. The two magnets 110 and 210 are provided on the substantially disk-shaped rotating body 400 including the support member 150 ( figure 1 (B)), two 2-axis magnetic sensor circuits 130, 230 are arranged on the substrate 140 ( figure 1 (A)). In addition, the 2-axis magnetic sensor circuits 130 and 230 are drawn ...

no. 7 Embodiment approach

[0115] C. Seventh Embodiment (Mechatronic Device Equipped with a Rotary Encoder)

[0116] Figure 16 It is a block diagram showing an electrical configuration of an electric motor 500 including a rotary encoder as an embodiment of the present invention. As a motor portion of the electric motor 500 , a rotor 510 and two-phase electromagnetic coils 522A and 522B are drawn. Electromagnetic coils 522A and 522B are provided on a stator not shown. The rotary shaft 530 of the electric motor 500 is connected to the rotary encoder 100 including two 2-axis magnetic sensor circuits 130 and 230 . As this rotary encoder 100 , the rotary encoders of the first to sixth embodiments described above can be used. The control unit 600 has a main control circuit 610 , drive signal generators 620A and 620B for two phases, and drive circuits 630A and 630B for two phases. To the main control circuit 610, the output signals D1, Pa, Pb, and Z of the first 2-axis magnetic sensor circuit 130 are supp...

Deformed example 1

[0128] In the various embodiments described above, two magnet bodies, the first magnet body and the second magnet body, are provided for the rotary encoder, but only one of the magnet bodies may be provided. When only one magnet is provided in the rotary encoder, it is preferable that the number M of poles of the magnet is an even number (a multiple of 2). Among them, it is more preferable to provide two magnets in that the absolute position of the rotating body of the rotary encoder can be detected.

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Abstract

The invention provides an encoder, an electromechanical device, a robot and a railway vehicle. The encoder comprises an M-pole (M is an even number) magnet body and a 2-axis magnetic sensor circuit having two magnetic sensing axis directions. Small magnets forming the magnet body are magnetized in the direction intersecting with the magnetic sensing surface of the 2-axis magnetic sensor circuit.

Description

[0001] This application is a divisional application of the invention patent application with the application number 201510111581.0, the application date is March 13, 2015, and the invention name is "encoder, electromechanical device, robot and railway vehicle". technical field [0002] The present invention relates to an encoder using a magnetic sensor and various devices using the encoder. Background technique [0003] As an encoder using a magnetic sensor, a rotary encoder described in Patent Document 1 is known. The rotary body of the rotary encoder is provided with a first magnet at the center thereof, and a plurality of ring-shaped second magnets are provided at the outer peripheral side. In addition, a first magnetic sensor for detecting the magnetic field of the first magnet and a second magnetic sensor for detecting the magnetic field of the second magnet are provided on the fixed body facing the rotating body. The first magneto-sensitive element and the second magn...

Claims

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Application Information

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IPC IPC(8): G01D5/14
Inventor 竹内启佐敏西泽克彦
Owner GK BRIDGE 1