1995 Fiscal Year Final Research Report Summary
Study on Difference between Electrical Parameters of Induction Motor for Vector Control System and Ones for Calculation of Load Characteristics
| Project/Area Number |
06650337
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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・電気機器工学
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| Research Institution | Meiji University |
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Principal Investigator |
MIKI Ichiro Meiji Univ., Dept.of Elec.Eng., Professor, 理工学部, 教授 (20130833)
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| Co-Investigator(Kenkyū-buntansha) |
KUBOTA Hisao Meiji Univ., Dept.of Elec. Eng., Associate Professor, 理工学部, 助教授 (10170036)
MATSUSE Kouki Meiji Univ., Dept.of Elec. Eng., Professor, 理工学部, 教授 (40061999)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Vector Control / Calculation of Load Characteristics / Electrical Circuit Parameters / Tuning of Parameters |
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| Research Abstract |
In this study, a simple method (A method) based on the one described in standard of the Japanese electrotechnical committee was selected to obtain electrical circuit parameters for calculating load characteristics of an induction motor, and a new auto-tuning method (B method) that we developed for this study was used to obtain circuit parameters for vector control system. According to this auto-tuning method, accurate parameters for vector control system can be obtain under the similar operating condition to the vector controlled motor. As a result, two sets of circuit parameters of the tested induction motor were obtained. Using these parameters, load characteristics were calculated and the vector control system was constituted. Although instantaneous torque waveform of the motor is slightly distorted when the vector control system is constituted using the parameters obtained by the A method, the linearity between input and output torque is almost maintained. Therefore, it is found that circuit parameters obtained by the A method are valid for this vector control system and the error of parameters for the start up of the vector control can be tolerant to some extent. Load characteristics calculated using circuit parameters of the B method almost agree with experimental results within the rated output of the induction motor. In this case, the primary and secondary leakage reactance of the induction motor obtained by the B method are about 2.0 times ones obtained by the B method. This is the largest cause for the error between calculated and experimental results in the region above the rated output, and the difference of leakage reactance values is caused by the difference of operating condition of induction motor when circuit parameters are identified. Furthermore, as circuit parameters for vector control system are tuned without considering the core loss of the motor stator, this is also one of causes that extend the difference of leakage reactances.
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