Permanent magnet synchronous motor fault-tolerant control device based on composite speed estimated rotating speed

A permanent magnet synchronous motor, fault-tolerant control technology, applied in the direction of motor generator control, electromechanical transmission control, electronic commutation motor control, etc., can solve the problems of motor speed oscillation, affecting the dynamic stability of the system, etc., to achieve simple, Good static stability and the effect of widening the speed range

Inactive Publication Date: 2015-03-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] But this invention still has the following disadvantages: when the motor system state is frequently switched between low speed and high speed, the estimated rotational speed adopted by the system will be at ω h and ω l switch back and forth between the two states, and ω h and ω l There is a deviation between them, which will cause the motor speed to oscillate and affect the dynamic stability of the system

Method used

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  • Permanent magnet synchronous motor fault-tolerant control device based on composite speed estimated rotating speed
  • Permanent magnet synchronous motor fault-tolerant control device based on composite speed estimated rotating speed
  • Permanent magnet synchronous motor fault-tolerant control device based on composite speed estimated rotating speed

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Embodiment

[0036] figure 2 It is a schematic diagram of the motor drive control system of the permanent magnet synchronous motor fault-tolerant control device based on the composite estimated speed.

[0037] In this example, if figure 2 As shown, the permanent magnet synchronous motor fault-tolerant control device based on the compound estimated speed of the present invention includes: model reference adaptive method estimation module 7 , high-frequency injection method estimation module 8 , estimated speed compound processing module 9 , and fault-tolerant control module 10 .

[0038] and figure 1 The shown motor drive control system is different. The present invention adopts the estimated rotational speed composite processing module 9 to replace the rotational speed accuracy rate calculation module. 2 and ω 3 Composite processing is performed to obtain the composite estimated speed To achieve the goal of improving the dynamic stability of the system. In this embodiment, the divi...

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Abstract

The invention discloses a permanent magnet synchronous motor fault-tolerant control device based on composite speed estimated rotating speed. After rotating speed omega 2 obtained by estimation through a model reference adaptive method (MRAS) and rotating speed omega 3 obtained by estimation through a high-frequency injection method are subjected to weighted processing, the estimated rotating speed is obtained; prior probabilities obtained based on a maximum likelihood estimation algorithm are inputted into a fault-tolerant control module based on posterior probability to obtain motor vector-controlled feedback rotating speed, accordingly, the goal of improving the dynamic performance of a system is realized, and meanwhile, the effect of steady-state error caused by the method is also reduced.

Description

technical field [0001] The invention belongs to the technical field of drive control of permanent magnet motors, and in particular relates to a fault-tolerant control device for permanent magnet synchronous motors based on compound estimated rotational speed. Background technique [0002] The permanent magnet synchronous motor has the advantages of small size, light weight, wide range of speed ratio and high efficiency, so many high-performance motors and motors in special fields at home and abroad use permanent magnet synchronous motors. Its power class ranges from milliwatts to megawatts, and its applications range from toys, industrial applications to marine electric propulsion. [0003] At present, in the permanent magnet synchronous motor control technology, in addition to difficult control problems such as flux linkage and large torque ripple, it also faces the problem of reliability assurance of various sensors required for control, especially the speed sensor. As an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 邹见效葛毅凡时财郑宏徐红兵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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