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Electric motor

A motor and motor shaft technology, applied in the field of motors, can solve the problems of waste, complex structure and positioning and assembly, weak anti-vibration and impact ability, etc., and achieve the effects of improving cost performance, low cost and simple production.

Active Publication Date: 2010-11-03
BEIJING JINGYI JINGYE ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photoelectric encoder has some insurmountable shortcomings: the photoelectric encoder is made of glass material through the engraved line, its anti-vibration and impact ability is not strong, it is not suitable for harsh environments such as dust and condensation, and its structure, positioning and assembly are complicated
Task 2 requires a small load and moderate speed, so the motor selected in Task 1 is no longer suitable for the working conditions of Task 2, and the motor needs to be selected, which will inevitably cause waste

Method used

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Embodiment 1

[0103] In the first embodiment, 3 magnetic induction elements are provided corresponding to the second magnetic steel ring, and 2 magnetic induction elements are provided corresponding to the first magnetic steel ring.

[0104] Due to the magnetization sequence of the magnetic poles of the second magnetic steel ring, the outputs of the n magnetic induction elements are in the form of Gray codes. The polarity of the magnetic pole is that the first digit of the Gray code is "0" corresponding to the "N / S" pole, and the first digit is "1" corresponding to the "S / N" pole. Therefore, in this embodiment, since n is 3, it is obtained as Figure 14 As shown in the code, 6 codes are obtained, that is, 6 poles are obtained, and the magnetization sequence is as follows Figure 15 As shown, the magnetic sensing elements are evenly distributed around for reading. The positional relationship between the second magnetic steel ring, the magnetic conduction ring and the magnetic induction ele...

Embodiment 2

[0122] Different from Embodiment 1, in this embodiment, 4 magnetic induction elements are provided corresponding to the first magnetic steel ring, and the four magnetic induction elements H 1 、H 2 、H 3 、H 4 The angle between them is 90° / 6, and the structural relationship between the first magnetic steel ring, the magnetic permeable ring and the magnetic induction element is as follows Figure 20 shown.

[0123] Figure 21 Shown is a circuit block diagram of the signal processing device when four magnetic induction elements are provided corresponding to the first magnetic steel ring. The output signals of the sensors 1_1 and 1_2 are connected to the amplifier circuit 2_1 for differential amplification, the output signals of the sensors 1_3 and 1_4 are connected to the amplifier circuit 2_2 for differential amplification, and then connected to the A / D converters 3_1 and 3_2. The case of a magnetic induction element.

[0124] Wherein, the function of the second combiner 7 i...

Embodiment 3

[0127] This embodiment differs from Embodiments 1 and 2 in that three magnetic induction elements are provided corresponding to the first magnetic steel ring, and three magnetic induction elements H 1 、H 2 、H 3 The angle between them is 120° / 6, such as Figure 22 as shown,

[0128] Figure 23 Shown is a circuit block diagram of the signal processing device when three magnetic induction elements are provided corresponding to the first magnetic steel ring. The processing process is basically the same as the previous two embodiments, except that since the synthesizer 7 has three input signals, the processing of signals D and R is slightly different from the previous two embodiments. In the present embodiment, the first synthesizer 7 processes the signals with the following principles: first judge the matching bits of the three signals, and compare the numerical values ​​of the signals with the same matching bits, and the smaller value is used for the output signal D, the sign...

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Abstract

The invention discloses a motor, comprising a body, a controller and a magnetoelectric sensor. The motor is characterized in that the magnetoelectric sensor is used for sensing rotation of a motor shaft, transmitting the sensed voltage signal to the controller, obtaining the rotation angle or position of the motor shaft through processing of the controller and further realizing precise control of the motor; the magnetoelectric sensor comprises a rotor and a stator covering the rotor inside; the rotor comprises a first magnetic steel ring and a second magnetic steel ring which are respectively fixed on the shaft of the same motor; n-numbered magnetic induction elements which are uniformly distributed and correspond to the second magnetic steel ring are arranged on the stator; the magnetic order of the magnetic poles of the second magnetic steel ring ensures the n-numbered magnetic induction elements to be output in the Gray code format; the two adjacent magnetic induction elements are output with difference of one-bit change; and m-numbered magnetic induction elements which are distributed at a certain angle are arranged corresponding to the first magnetic steel ring. The motor has low cost, high system reliability and high system response speed.

Description

technical field [0001] The invention relates to an electric motor, especially a control electric motor for precise position control. Background technique [0002] The electric motor is a very widely used power source in the industrial field, and the control of the electric motor will directly affect the operation of the whole system. Therefore, the control system of the electric motor has also been widely concerned. [0003] There are many types of motors. According to different classification standards, motors can be divided into asynchronous motors, synchronous motors; AC motors, DC motors, etc. In some existing systems, it is necessary to precisely control the position and speed of the motor, so a servo motor appears. The motor is combined with a controller and an encoder to realize closed-loop control of the motor. Because of its high response characteristics and wide speed range, it has attracted wide attention in industrial and agricultural production. The accuracy ...

Claims

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Application Information

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IPC IPC(8): H02K29/08H02K1/22H02K1/12H02K9/04H02P6/16H02P23/14
Inventor 叶劲峰
Owner BEIJING JINGYI JINGYE ELECTRIC TECH
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