Magnetic encoder for electric door motor

A magnetic encoder and electric door technology, applied in the field of magnetic encoder, can solve the problems of poor protection ability, small working temperature range, short service life, etc., and achieve the effect of small installation space, few mechanical parts and simple structure

Inactive Publication Date: 2010-07-28
江门市蒙德电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of these types of encoders are equipped with bearings and have a short service life; some have poor protection capabilities and a small operating temperature range; some are too large in size, or cannot output absolute position signals, etc. Used on electric door motor
Moreover, the cost of the above encoders is relatively high

Method used

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  • Magnetic encoder for electric door motor
  • Magnetic encoder for electric door motor
  • Magnetic encoder for electric door motor

Examples

Experimental program
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Embodiment Construction

[0019] see figure 1 , which is a schematic diagram of the front structure of the electric door motor magnetic encoder of the present invention. The magnetic encoder includes a permanent magnet 10 , a detection component 20 , a cylindrical sleeve 30 and a printed circuit board (PCB) 40 . Wherein, the detection component 20 includes two Hall sensors 22 and a digital processor 24, and the digital processor 24 has an A / D converter.

[0020] On the physical position, the cylindrical sleeve 30 is tightly sleeved on one end of the motor shaft 50, and the permanent magnet 10 is fixed on the other end of the cylindrical sleeve 30, so that the permanent magnet 10 is relatively fixed with the motor shaft 50, and the permanent magnet 10 is fixed with the motor shaft 50. Rotating together, the central axis of the permanent magnet 10 coincides with the central axis of the motor shaft 50 . Wherein, the permanent magnet 10 is a non-magnetic material, such as aluminum, copper, plastic and so...

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PUM

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Abstract

The invention relates to a magnetic encoder for electric door motor, comprising a permanent magnet and a detection assembly. The permanent magnet is fixedly arranged on the rotor of the motor; and the detection assembly is fixedly arranged on the case of the motor and is parallel with one end face of the permanent magnet. The detection assembly comprises two hall sensors and is used for detecting magnetic field produced by the permanent magnet and outputting signal. Compared with the prior art, the invention has the advantages of no bearing, impact resistance, vibration resistance, long service life and free dust and free oil stains.

Description

technical field [0001] The invention relates to a position sensing device of an electric door motor, in particular to a magnetic encoder for the electric door motor. Background technique [0002] Elevator car doors, building access glass doors, subway screen doors, mechanical device operation protection doors, etc. generally use electric doors, and these electric doors require motors as their driving power. For the motor of the electric door, it needs to have the performance of large output torque, small size, high efficiency, and easy control. Due to the high frequency of use of electric doors, the reliability requirements for their motors are also high. At present, commonly used electric door motors include brushed DC motors, brushless DC motors, AC asynchronous motors, permanent magnet synchronous motors, etc. Among these types of motors, permanent magnet synchronous motors are very suitable for driving electric doors because of their advantages such as large output tor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/06
Inventor 邓之江
Owner 江门市蒙德电气股份有限公司
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