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Direct torque control method of PMSM (Permanent Magnet Synchronous Motor)

A direct torque control, permanent magnet synchronous motor technology, applied in the field of control, can solve problems such as poor anti-interference ability and poor parameter robustness

Active Publication Date: 2014-04-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional DTC, the speed loop uses a PI regulator. Although the PI regulator has the advantages of simple structure and good stability, its parameter robustness is poor, resulting in poor anti-interference ability of the system, so it is necessary to improve it.

Method used

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  • Direct torque control method of PMSM (Permanent Magnet Synchronous Motor)
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  • Direct torque control method of PMSM (Permanent Magnet Synchronous Motor)

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] at a given speed and actual speed As an input signal, given by electromagnetic torque As output signal, the design is based on the ADRC speed regulator, see figure 1 Shown is a schematic diagram of the ADRC-based speed regulator provided by the present invention, which is composed of a tracking-differentiator (TD), an extended state observer (ESO) and a nonlinear state error feedback (NLSEF). at a given speed As a TD input signal, TD extracts tracking value of v 1 As the output signal of TD; As the ESO input signal, the ESO output signal is tracking value of and an estimate of the disturbance to the system ;according to with get state error As the input signal of NLSEF, NLSEF outputs the initial control quantity ; The final control quantity is .

[0035] According to the principle of ADRC, the change of load ...

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Abstract

The invention provides a direct torque control method of a PMSM (Permanent Magnet Synchronous Motor). According to the method, LSSVM is used for optimizing an ADRC speed regulator in a PMSM direct torque control system. The method comprises the following steps: utilizing a tracking value Z1 of a motor actual rotation speed wr output by an ESO in the ADRC as an input signal of an LSSVM optimal regression model obtained by disperse training, utilizing the sum of partial system disturbed value estimated by the LSSVM optimal regression model according to Z1 and other disturbed values estimated by the ESO as the system total disturbance; performing feed-forward compensation on the system total disturbance by virtue of follow-up operation of the ADRC. The invention provides a PMSM direct torque control method based on an optimization and ADRC (Auto Disturbance Rejection Controller) of a least square support vector machine. The method can be used for improving the observation precision of the ADRC and the dynamic response speed of the system, reducing the influence of the motor parameter change and load disturbance on the system, and further improving the anti-disturbance capacity of the system.

Description

technical field [0001] The invention relates to a direct torque control method of a permanent magnet synchronous motor based on a Least Square Support Vector Machine (LSSVM) optimized Active Disturbance Rejection Controller (ADRC), which belongs to the field of control technology. Background technique [0002] Permanent magnet synchronous motor (PMSM) has the advantages of high power density, large starting torque, and high efficiency. It has become a research hotspot in the field of electric power transmission and is increasingly used in various occasions that require high motor performance. [0003] PMSM has the characteristics of multi-variable, strong nonlinear and strong coupling. In order to improve the control performance, it is necessary to overcome the influence of uncertain factors and nonlinear on system performance. Compared with other control methods, PMSM direct torque control (DTC) method has fast torque response and good dynamic performance. In the tradition...

Claims

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Application Information

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IPC IPC(8): H02P21/14
Inventor 刘英培粟然
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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