| Project/Area Number |
60550182
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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 |
機械力学・制御工学
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| Research Institution | Tokyo Women's Medical College |
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Principal Investigator |
KABEI Nobuyuki Institute of Biomedical Engineering, 医学部, 講師 (50096583)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1985: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Magnetic fluid / Hydraulic system / Laminar proportional amplifier / Transducer / 電磁石 / 作動流体 / 信号増幅 |
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| Research Abstract |
We developed a magnetic controlled laminar proportional amplifier (MCLPA) which has two electromagnets installed at the outlet of a supply nozzle. Using a magnetic fluid as the working fluid of a hydraulic system of the MCLPA instead of conventional petroleum, an electrical to mechanical transducer having no moving parts can be realized.
Width of the nozzle of the MCLPA was 1 mm and aspect ratio were 0.5 and 1. In this study , we examined the characteristics of the MCLPA. The maximum strength of the magnetic field which was generated by the electromagnet of the MCLPA with a current of 1 A was 0.1 T. Without any supply current, pressure recovery of the MCLPA increased in proportion to the modified Reynolds number. The maximum pressure recovery was 37 % It was confirmed that the shape and dimensions of the MCLPA was adequate for this application. Applying a constant current, i.e., 1 A, to the electromagnet, the pressure difference between two outlet ports of the MCLPA increased in proportion to the modified Reynolds number. The maximum pressure difference was 74.7 KPa at the modified Reynolds number of 850. The output pressure difference increased aproximately in proportion to the second power of the supply current to the electromagnet.
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