2011 Fiscal Year Final Research Report
Achievement of Miniaturized and Inductor-less AC-DC converter Using Mechanical Resonance of Single-Crystal Piezoelectric Small-Thin Rectangular Plate
| Project/Area Number |
21360125
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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 | 一般 |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Yamagata University |
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Principal Investigator |
HIROSE Seiji 山形大学, 大学院・理工学研究科, 教授 (70007201)
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| Co-Investigator(Kenkyū-buntansha) |
TAMURA Hideki 東北工業大学, 工学部, 准教授 (90396581)
AOYAGI Manabu 室蘭工業大学, 大学院・工学研究科, 教授 (80231786)
TAKANO Takehiro 東北工業大学, 工学部, 名誉教授 (50085411)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 電気機器 |
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| Research Abstract |
This study aims to achieve a miniaturized and high efficiency AC-DC converter without the wiring, by using the single-crystal piezoelectric transformer. As the results of the analysis and measurement, it has been found that the piezoelectric transformer with very high efficiency of about 95% can be achieved. Next, for obtaining the high-performance driving circuit of the piezoelectric transformer, the switching characteristics of the MOSFET switching circuits have been examined in detail in the high-frequency range from around 100kHz to 900kHz. Moreover, the measuring system has been constructed to measure precisely the performance characteristics of the piezoelectric transformer, by controlling the unstable non-linear phenomena appearing during the practical high-power driving of the piezoelectric transformer.
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