| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
A purpose of this research is to create the new inverter circuit which can realize both high efficiency and low distortion without using LC filter. This circuit selects desired electric potential from the several voltage levels and outputs voltage without using a PWM control. Improvement of the efficiency was attempted by the selection of the element of the low on-resistance, and extensibility was raised by a circuit-board composed of 4 elements per 1 unit. In addition, it was considered a control method to realize accurate operation. The experiment was carried out in the basic circuit of 3 levels, and high efficiency and operation without the delay were confirmed. It was expanded to 13 levels, and a superior characteristic of the operation was inspected. Furthermore, a review of the switching operation was carried out, and 98.5% of high efficiency to exceed a conventional inverter and approximately 3% of waveform distortion were accomplished.
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