1989 Fiscal Year Final Research Report Summary
An investigation of new type robust servo control system by using sqirrel-cage induction motor
| Project/Area Number |
63550218
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
電力工学
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| Research Institution | Nagasaki University |
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Principal Investigator |
YAMADA Eiji Nagasaki University, Engineering Professor, 工学部, 教授 (00039661)
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| Co-Investigator(Kenkyū-buntansha) |
IZUMI Katsuhiro Nagasaki University, Engineering Assistant, 工学部, 助手 (50128154)
NOZAKI Kouichi Nagasaki University, Science Information Center Lecturer, 総合情報処理センター, 講師 (00124834)
HIGUCHI Tsuyosi Nagasaki University, Engineering Associate Professor, 工学部, 助教授 (50156577)
TSUJI Mineo Nagasaki University, Engineering Associate Professor, 工学部, 助教授 (80145218)
OYAMA Jun Nagasaki University, Engineering Professor, 工学部, 教授 (00037920)
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| Project Period (FY) |
1988 – 1989
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| Keywords | Induction motor / Vector control / Model following control / Robust control / Voltage source inverter |
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| Research Abstract |
The purpose of this investigation is to develop a voltage source inverterfed squirrel-cage induction motor servo system in which the transfer function between the torque and its command is simplified like a DC motor by the vector control. In this system, an improvement of robustness for the change of load and system parameters is studied. The results obtained by the analysis and experiment are as follows:
1. System design and analysis: A model following controller is adapted to a PWM inverter-fed induction motor servo system. The gains of controller is designed by using the optimal regulator theory to minimize the specified performance index. In order to study the influence of machine parameter change, a linear model of the system is derived by using a small displacement theory. The trajectories of poles and zeros and the transient responses are studied.
2. Experimental equipment: The microprocessor V40 is used for the implementation of the model following control and the vector control. The software is described by the assembly language to reduce the computation time. For the data transmission, the debugging of control program and the display of state variables, a controller monitor is developed.
3. Analytical and experimental results: The model following control is superior to the conventional PI ( proportional plus integral ) control with regard to following points: (1) The optimal gains of the model following controller are easily determined for the specified weighting constant. (2) The overshoot for the change of command values is decreased. (3) By selecting a large value of the weighting constant, the system is robust for the change of load torque and plant parameters.
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Research Products
(10 results)
