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The Research on Speed Sensorless Vector Controlled Induction Motor Drives

Author: LiZiCheng
Tutor: ShenAnWen
School: Huazhong University of Science and Technology
Course: Control Theory and Control Engineering
Keywords: No speed sensor Model Reference Adaptive Speed ??estimation State observer Lyapunov stability theorem Flux Observer
CLC: TM346
Type: Master's thesis
Year: 2005
Downloads: 536
Quote: 2
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Abstract


High - performance AC speed control system needs to speed closed-loop control , which requires speed sensors to measure the speed , the problem caused by the installation difficulties , raising the cost of the cancellation of the speed sensor using known information to estimate the speed has become a hot research topic many scholars at home and abroad in the past 20 years dedicated to research on the speed sensor control system . Based on the steady-state equations of induction motor structure model reference adaptive observer to estimate the rotor speed , thus constituting speed sensorless vector control system for a more comprehensive , in-depth research . Several methods for velocity estimation , analysis of the advantages and disadvantages of each , and expounded dependent motor steady-state equation for velocity estimation of motor parameters identification theory . Then select the model reference adaptive methods to estimate the rotor speed . Using the motor itself as a reference model , the motor full-order equation of state as an adjustable model , using the Lyapunov second legal rationale ensure system stability premise pushdown export Speed ??Estimation adaptive law as a system error output stator current . Taking into account that the method depends on the motor parameters, and the motor parameters in the process of motor movement varies greatly , and thus gives the compensation principle changes in the resistance of the stator and the rotor resistance recognition strategies . Speed ??sensorless vector control system simulation platform using Matlab / Simulink structure model reference adaptive system to estimate the rotor speed is substituted into the closed loop vector control system speed to verify the accuracy and stability of the system speed estimation and stator resistance error compensation simulation . Simulation results show the feasibility of the method , system better torque and speed characteristics at low speeds . The estimation of the rotor speed DSP frequency control system experimental platform , the test results prove the velocity estimation method proposed in this paper has a certain practical value .

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