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Position observation device and method for rotor of built-in permanent magnetic synchronous motor based on adaptive filtering

A technology of permanent magnet synchronous motor and self-adaptive filtering, applied in the direction of controlling electromechanical transmission, electronic commutator, controlling generator, etc., can solve problems such as 6th harmonic pulsation observation error, and achieve improved control performance and satisfactory control Performance, signal processing method is simple and easy to implement

Active Publication Date: 2015-02-04
哈工科讯(沈阳)智能工业技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the observation value of the rotor position angle obtained by the existing model method contains the observation error of the 6th harmonic wave, and proposes a built-in permanent magnet synchronous motor rotor position observation device and observation method based on adaptive filtering

Method used

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  • Position observation device and method for rotor of built-in permanent magnetic synchronous motor based on adaptive filtering
  • Position observation device and method for rotor of built-in permanent magnetic synchronous motor based on adaptive filtering
  • Position observation device and method for rotor of built-in permanent magnetic synchronous motor based on adaptive filtering

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specific Embodiment approach 1

[0023] Specific implementation mode one: see figure 1 Describe this embodiment, this is the built-in permanent magnet synchronous motor rotor position observation device based on adaptive filtering described in the method, it is characterized in that it includes a sliding mode observer 1, an adaptive notch filter 2, a back EMF return A chemical unit 3 and a quadrature phase-locked loop 4, the sliding mode observer 1 is provided with the stator voltage u of the α-axis in the two-phase static coordinates α Stator voltage u at input, β-axis β Input and rotor angular velocity observations At the input end, the equivalent back EMF information z of the α-axis of the sliding mode observer 1 αeq Equivalent back EMF information z at the output to the α axis of the adaptive notch filter αeq The input terminal is connected, the β-axis equivalent back EMF information z of the sliding mode observer 1 βeq The β-axis equivalent back EMF information z of the output terminal and the adapt...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment is a further limitation of the built-in permanent magnet synchronous motor rotor position observation device based on adaptive filtering described in Embodiment 1. The sliding mode observer 1 includes a back electromotive force model unit, a saturation function unit, low-pass filter and two subtractors,

[0025] The back electromotive force model unit is set with the stator voltage u of the α-axis in the two-phase stationary coordinates α Stator voltage u at input, β-axis β Input terminal, rotor angular velocity observation value The electromotive force information z of the input terminal and the α axis α The electromotive force information z of the input terminal and the β axis β The equivalent back electromotive force information z of the input terminal and the α axis αeq The equivalent back electromotive force information z of the input terminal and the β axis βeq At the input terminal, the stator voltage u of the α-axis in the two...

specific Embodiment approach 3

[0026] Specific embodiment three: this embodiment is a further limitation of the built-in permanent magnet synchronous motor rotor position observation device based on adaptive filtering described in specific embodiment one, and the back electromotive force normalization link 3 includes two multipliers , dividers, adders, and function processors,

[0027] A multiplier for the α-axis observation term z αf The input terminal is the first α-axis observation item z of the back EMF normalization unit 3 αf Input terminal, the multiplier is provided with a sine function input terminal, which is the sine function input terminal of the back electromotive force normalization unit 3, and the signal output terminal of the multiplier is connected with an addend input terminal of the adder, and the other The β-axis observation term z of the multiplier βf The input end is the first β-axis observation item z of the back EMF normalization unit 3 βf Input terminal, the multiplier is provided...

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Abstract

The invention provides a position observation device and a position observation method for a rotor of a built-in permanent magnetic synchronous motor based on adaptive filtering, and belongs to the field of motor control, solving the problem of the convectional model method that six-time harmonic pulsation observation error is contained in the acquired rotor position angle observation value. The position observation device and the position observation method are respectively an adaptive notch filtering filter signal processing device and an adaptive notch filtering filter signal processing method based on the least mean square algorithm, and the device and the method are used for removing the six-time rotor pulsation error in the control technology model method applicable to a middle and high speed position-free sensor permanent magnetic synchronous motor. The method comprises the following steps of: acquiring equivalent back electromotive force information through the model method; regulating through the adaptive notch filtering filter based on the least mean square algorithm; then carrying out normalization processing on the back electromotive force information; and finally acquiring a rotor position observation value through a phase-locked loop. The device and the method provided by the invention are simple and easy to implement, can be used for effectively inhibiting the influence of the six-time pulsation error in the rotor position observation value and improving the performance of the position-free sensor permanent magnetic synchronous motor, and are applicable to a permanent magnetic synchronous motor control system.

Description

technical field [0001] The invention belongs to the field of motor control. Background technique [0002] In recent years, the speed control system of permanent magnet synchronous motor has gradually become a research hotspot in the field of AC speed control transmission. The reason is that compared with the traditional asynchronous motor, the advantages of the permanent magnet synchronous motor are: simple structure, small size, light weight, reliable operation, high power density, good speed regulation performance, etc. It is the ideal choice for high-speed electric drive system, and its application field is very wide. According to the structure of the permanent magnet of the permanent magnet synchronous motor rotor, it can be divided into two types: surface mount type and built-in type. [0003] At present, in the application of high-performance permanent magnet synchronous motor speed control systems, it is usually necessary to install mechanical position detection ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/18H02P6/182H02P21/13
Inventor 王高林张国强李卓敏詹瀚林杨荣峰于泳徐殿国
Owner 哈工科讯(沈阳)智能工业技术有限公司
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