| Project/Area Number |
09555091
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | Hiroshima National College of Maritime Technology |
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Principal Investigator |
KOGA Kunio Hiroshima National College of Maritime Technology, Electronic Control Engineering Department, Professor, 電子制御工学科, 教授 (60249844)
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| Co-Investigator(Kenkyū-buntansha) |
KUMA Hideki Hiroshima National College of Maritime Technology, Electronic Control Engineering Department, Associate Professor, 電子制御工学科, 助教授 (40259924)
FUJITOMI Nobuyuki Hiroshima National College of Maritime Technology, Electronic Control Engineering Department, Professor, 電子制御工学科, 教授 (30124085)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 1999: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1998: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1997: ¥3,700,000 (Direct Cost: ¥3,700,000)
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| Keywords | Power-factor improvement / Nonlinear reactor / Capacitor input rectification circuit / Stabilization control / Higher harmonic |
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| Research Abstract |
This report is a summary of the research result to research topic "Diode converter power-factor improvement with a nonlinear reactor" based on science research expense subsidy base research (B) (2). This research has aimed to improve diode converter power-factor by the method of inserting a nonlinear reactor which is the passive element in the power supply side. First of all, the power-factor improvement characteristic of the diode converter with a nonlinear reactor was clarified by the theory and the experiment. A nonlinear reactor can be achieved with an orthogonal type magnetic core. However, because the magnetic flux distribution of a nonlinear reactor with an orthogonal magnetic core is complex, the design is very difficult. Then, the method of designing a nonlinear reactor with a partial gap in the yoke was established. As a result, the design and the manufacture of a nonlinear reactor became easy. It has been understood to be able to improve power-factor up to 90% with a manufactured nonlinear reactor.
Next, there is an error because the method of theoretically calculating the power-factor improvement characteristic is an approximate method. This theory is assumed that the inductance of a nonlinear reactor is 0 or infinity. Therefore, the error occurs. Then, the error of a theoretical characteristic when differing from this assumption was clarified by the computer simulation. As a result, the range of the error in the system design by a theoretical characteristic becomes clear and the accuracy of the system design has improved.
In addition, various characteristics of diode converter power-factor etc. when a nonlinear reactor was not used were theoretically clarified. As a result, the effects of the power-factor improvement method with a nonlinear reactor can have been compared.
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