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Magnetic encoder, magnetic code disc thereof and magnetic code disc manufacturing method

A magnetic encoder and magnetic conduction technology, applied in the field of magnetic grid and magnetic grid preparation, can solve the problems of low resolution, difficulty in magnet design and processing, increase in magnet volume, etc., and achieve high detection accuracy, compact structure, mechanical The effect of convenient processing

Active Publication Date: 2016-10-26
浙江森尼克半导体有限公司
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  • Application Information

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Problems solved by technology

However, the traditional magnetic encoder as mentioned above has a limited resolution due to the limited number of magnetic pole pairs; if the number of magnetic pole pairs is increased, the difficulty of magnet design and processing and the volume of the magnet will be greatly increased

Method used

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  • Magnetic encoder, magnetic code disc thereof and magnetic code disc manufacturing method
  • Magnetic encoder, magnetic code disc thereof and magnetic code disc manufacturing method
  • Magnetic encoder, magnetic code disc thereof and magnetic code disc manufacturing method

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Embodiment Construction

[0028] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0029] attached figure 1 Shown is a schematic diagram of the application scene of a magnetic encoder of the present invention on a motor, refer to the attached Figures 1 to 4 As shown, the magnetic encoder includes a permanent magnet 3 fixedly connected to the motor housing 1, a magnetically permeable code disc 7 fixedly connected to the output shaft 2 of the motor, and a PCB 4 located between the permanent magnet 3 and the magnetically permeable code disc 7 . The permanent magnet 3 is made of a permanent magnetic material and generates a stable strong magnetic field. The magnetically permeable code disk 7 has a magnetic grating, and the magnetic grating is made up of a magnetically permeable part 71 for disturbing the ma...

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Abstract

The invention discloses a magnetic encoder, a magnetic code disc thereof and a magnetic code disc manufacturing method. According to the magnetic encoder, a magnetic part playing a turbulence role on a magnetic field generated by a permanent magnet is arranged on the magnetic code disc, the magnetic code disc is easy to process, limitations from a number of magnetic pole pairs do not exist, limitations on intervals and numbers of magnetic parts and non-magnetic areas are little, and the structure of the magnetic encoder is more compact while the detection precision is considered. The magnetic encoder comprises a permanent magnet for being fixedly connected with a motor shell and the magnetic code disc for being fixedly connected with the output shaft of the motor; the magnetic code disc is provided with at least one circle of magnetic grids, the magnetic grid is composed of the magnetic part playing a turbulence role on the magnetic field generated by the permanent magnet and the non-magnetic area connected with the magnetic part, and the magnetic part is made of a magnetic material; the magnetic encoder also comprises a signal processor; and the signal processor comprises a sensor arranged between the permanent magnet and the magnetic code disc for detecting changes of the magnetic field.

Description

technical field [0001] The invention relates to the field of magnetic encoders, in particular to a magnetic encoder, a magnetic grid of the magnetic encoder and a preparation method for the magnetic grid. Background technique [0002] According to the detection principle, encoders are mainly divided into photoelectric encoders and magnetic encoders. A general photoelectric encoder is mainly composed of a photoelectric code disk with a shaft in the center and a photoelectric detection device. The photoelectric code disk has circular open and dark engraved lines. When rotating, the grating disc and the motor rotate at the same speed, and a number of pulse signals are detected and output by the detection device composed of light-emitting diodes. By analyzing the pulse signals, the current speed of the motor or the angle of rotation and the direction of rotation can be reflected. Traditional photoelectric encoder code discs are made of glass, metal, and plastic. The glass code ...

Claims

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Application Information

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IPC IPC(8): G01D5/12H02K11/215
CPCG01D5/12H02K11/215
Inventor 郑律
Owner 浙江森尼克半导体有限公司
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