2 0 0 0 IR 平板に垂直に立てた円錐まわりの流れについて
- 著者
- 伊良部 邦夫 山里 栄昭 照屋 功 Irabu Kunio Yamazato Eisho Teruya Isao
- 出版者
- 琉球大学工学部
- 雑誌
- 琉球大学工学部紀要 (ISSN:0389102X)
- 巻号頁・発行日
- no.50, pp.p1-7, 1995-09
The experiments were conducted to measure the velocities of flow around a circurlar cone. Because of variaton of the cross section area in the longitudinal axis, the flow around the the circular cone behaves very high complex and forms the vortex streets which are issued from both side of the cone and attach in downstream to the plate setting it. The flow fields were visualized using the mixed particles in water and resulted in the velocity fields by the method of Particle Imaging Velocimetry (PIV). From analyses of the instantaneous velocity fields, the Strouhal numbers which showed an interesting variation were gained to the Reynolds numbers.
1 0 0 0 OA ベクトル制御による三相リラクタンスモータの速度制御システム
- 著者
- 上里 勝實 当銘 秀之 宜保 直樹 千住 智信 Uezato Katsumi Toume Hideyuki Gibo Naoki Senjyu Tomonobu
- 出版者
- 琉球大学工学部
- 雑誌
- 琉球大学工学部紀要 (ISSN:0389102X)
- 巻号頁・発行日
- no.43, pp.19-31, 1992-03
The instantaneous torque control of a reluctance motor has been very difficult, since a flux and torque component current can not be controlled directly.This paper adopts the vector control method to control the motor as a direct current motor. The velocity control system is made up by using the reluctance motor for a vector control.The performance of this system is discussed by simulation results.As a result, the system has a good torque control characteristic is shown.