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Research on Adaptive-Direct Torque Control of PMSM

Author: ZhengChaoDi
Tutor: YangXiangYu
School: South China University of Technology
Course: Motor and electrical
Keywords: permanent magnetism synchronous machine Finite element Adaptive control Direct torque
CLC: TM341
Type: Master's thesis
Year: 2011
Downloads: 125
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Abstract

The alternating current machine divides into the asynchronous machine and the synchronous machine. The asynchronous machine rotor structure is simple, is reliable, is applied massively in the industry, But the power factor is low, the efficiency also receives affects. The electric excitation synchronous machine rotor structure is complex, but the power factor is high, the efficiency is also high. If with permanent magnet excitation constitution permanent magnetism synchronous machine, then may give dual attention to both merit, Therefore permanent magnetism synchronous machine and high performance control’s research oneself becomes the current research hot spot.This article takes the object of study by permanent magnetism synchronous machine and the velocity modulation system, unifies the domestic and foreign related literature, introduced permanent magnetism synchronous machine produces background condition, historical development, research present situation and research significance. Then introduced permanent magnetism synchronous machine electrical machinery’s structure, the principle of work, have inferred permanent magnetism synchronous machine’s several mathematical model, And take the d-q mathematical model as the foundation, has established the simulation model under the Matlab/simulink environment. On the other hand introduces control method’s adaptive control inside the motor control, introduced specially two kind of most common models refer to the self-adaptive system as well as the self-correcting control system, and discusses between them the stable astringency as well as between them the good and bad points.Next obtained from the finite element elementary theory, to introduce the establishment finite element model elementary theory equation. Then has established permanent magnetism synchronous machine’s finite element model using under ansoft software platform’s Maxwell 2D and has carried on the finite element computation. From“field”the angle analyzes permanent magnetism synchronous machine’s structure particularity, with“field road union”the method obtains the electric machine design preliminary parameter, provides the theory basis for electrical machinery’s optimization design. From the idling constant velocity, the idling accelerate, the constant speed sudden coil loading, the dead load to accelerate four kind of situation simulation result suddenly suddenly the analysis, confirmed has been direct the torque control based on the auto-adapted direct torque control compared to the tradition the sophistication.This article uses the d-q axis coordinate mathematical model, has established permanent magnetism synchronous machine’s mathematical model under the Simulink environment. The findings indicated that the auto-adapted - direct torque control algorithm is quite simple, the rotational speed, the torque response’s speed is very quick, to study this kind of control algorithm to create the very good rationale in the permanent magnetism synchronous machine’s practical application.

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CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Synchronous motor
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