2 0 0 0 IR 円形のあみだくじ
- 著者
- 内村 桂輔
- 出版者
- 山梨大学工学部
- 雑誌
- 山梨大学工学部研究報告 (ISSN:05131871)
- 巻号頁・発行日
- no.36, pp.p126-129, 1985-12
We define a circular Amida lot and evaluate the number of vertices of it needed to represent a permutation.
1 0 0 0 OA 三相複合PWM電圧形インバータ
- 著者
- 数野 寛 佐久間 啓 小松 雅広
- 出版者
- 山梨大学工学部
- 雑誌
- 山梨大學工學部研究報告 = 山梨大學工學部研究報告 (ISSN:05131871)
- 巻号頁・発行日
- vol.39, pp.1-6, 1988
In this paper, the authors have discussed their research on the compound PWM method. In this method, two modulated PWM waves are compounded via an interphase reactor. One PWM wave is modulated by an isosceles triangular carrier wave, and another PWM wave is modulated by an antiphase isosceles triangular wave. In the inverter appling this method, the order of the residual harmonic is higher than the conventional PWM method. Therefore, the LC filter, which eliminates the higher harmonics, is able to compose more simply. When this inverter is applied to the speed adjustment of the induction motor, there are scarcely magnetic noise and torque ripple. Therefore the smooth rotation is obtained.