1 0 0 0 IR 駆動電流波形制御による直流モータの騒音抑制法
- 著者
- 長屋 幸助 湯澤 秀人 村上 岩範
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 日本機械学會論文集. C編 (ISSN:03875024)
- 巻号頁・発行日
- vol.65, no.640, pp.4653-4659, 1999-12-25
- 被引用文献数
- 2
Since a commutator of the DC-motor is divided into a number of segments to have the torque in the circumference direction, the currents in the coils of the rotor vary and have alternative waves during the rotor rotation even in a constant input voltage. The currents become sharp waves, so that they have high frequency component. This implies that the rotor shaft and the case of motor are excited electromagnetic forces with high frequency components. Since high frequency noises are loud when they are input to human ears, so that when high frequency vibrations are suppressed, noises become small. From the situation, this paper discusses a method of noise reduction of Dc Motor. In the method, the current waves are controlled to be sinusoidal waves. The method and the control algorithm are given. In order to validate the method, experimental tests are carried out. It is proven that our method is applicable to the motor noise control.
- 著者
- 村上 岩範 後藤 桂孝 吉澤 明訓 安藤 嘉則 山田 功
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 日本機械学會論文集. C編 (ISSN:03875024)
- 巻号頁・発行日
- vol.76, no.765, pp.1093-1099, 2010-05-25
In this research, we propose the driving method of the magnetic material disc by the rotating magnetic field. When the rotating magnetic field is given to the magnetic material disk, the magnetic material disk is magnetized by a phase different from the rotating magnetic field. Therefore, magnetic attractive force acts between the magnetic material disk and the rotating magnetic field. At this time, because force in the vertical direction and radial direction cancelled respectively, only force in the circumferential direction comes to act. The rotating torque is generated by this force in the circumferential direction. Therefore, the magnetic material disc rotates. The purpose of a present article is to clarify the proposed driving principle by doing the magnetic flux density measurement, torque measurement and the torque analysis. Then, this driving principle was clarified to some degree.
1 0 0 0 653 高温超電導フライホイールの開発
- 著者
- 關口 隆弘 村上 岩範 都丸 瞬 後藤 桂孝 吉澤 明訓
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- Dynamics & Design Conference
- 巻号頁・発行日
- vol.2008, pp."653-1"-"653-6", 2008-09-02
In this research, it proposes the development of High-Tc Superconducting Levitation flywheel. The permanent magnet magnetized in the thickness direction where the sectorial magnetic material plate is adsorbed creates the multipole field outside of the magnet. The levitation body achieved the stable rotation without the control by giving the driving force from the axial direction to the multipole field of the levitation body, and thus it succeeded in riding past the resonance. And, the voltage correction that considered the counter-electromotive force and impedance was executed so that this system might obtain the stable torque. As a result of measurement of electric power generation at the high-speed rotation region, it was confirmed that this system had about 84% conversion efficiencies. The result of the experiment and the theoretical value of the magnetic flux density, the torque, the frequency response, and the conversion efficiency of this system were compared. As a result, because measurements and the analytic value were corresponding well, it was confirmed that this analysis was useful.
