新型磁流變液煞車器之設計與測試

Design and Testing of an Innovative Magnetorheological Brake

張正暘(Cheng-Yang Chang)

指導教授 ： 蕭耀榮

國立臺北科技大學/機電學院/車輛工程系所/碩士(2010年)

摘要

目前磁流變液(Magnetorheological，簡稱MR)煞車器基本上是圓柱體為主，內部構造為外筒加上內盤，而在內盤的外圍環繞著剖面為C型的導磁金屬或矽鋼片，其上再纏上線圈做為一個外加磁場，而內盤與此導磁金屬之間的間隙則均勻分佈著磁流變液液體。基本上C型導鐵的設計概念對於磁流變液液體周圍可被外加磁場作用的面積是有限，相對而言能提供的煞車力也較小。
本研究提出一新型磁流變液煞車器之設計，是利用分散式線圈之設計，來增加外加磁場作用在磁流變液的面積，即在一磁流變液液體周圍放置複數個磁極，各磁極以不同之磁場方向依序排列在磁流變液液體的周圍，煞車器上下也同樣放置兩個磁極，使整個圓柱體都被磁路給包覆住，產生更大之煞車力。
本研究使用電腦模擬進行新型磁流變液煞車器之最佳化分析，分析此煞車器三個變數：磁極間距、磁極數、磁流變液磁場通道之寬度。由此最佳化後之煞車器尺寸進行性能模擬，並與市售之磁流變液煞車器比較後，可證明新型磁流變液煞車器之性能提高了118％。

關鍵字

磁流變液 ； 磁流變液煞車器

並列摘要

The majority of current Magnetorheological Fluid (referred to as MR Fluid) brake is cylinder. The internal part is composed by outer tube with internal structure. The magnetorheological fluid is full around the inner disk uniformly. The extra magnetic field is constructed by C-type conductivity silicon iron or steel wrap the coil around the Magnetorheological fluid and it mainly causes a reaction with the fluid. Basically, C-type guide rail design concept is applied to magnetic field. However, the reaction is limited. Relatively, the MR Brake provides the braking force is much smaller.
This research proposed a new design for MR brakes. The main idea is to use distributed coil design to increase the reaction within the external magnetic field in the area of Magnetorheological fluid. Plural magnetic poles are placed around magnetorheological fluid, and each pole is arrayed with different directions of the magnetic field around the Magnetorheological fluid. In addition, MR brakes is placed on two poles, top and bottom so that the magnetic directions are all encircled in the cylinder that can generate more braking forces.
The computer simulation is applied to perform the optimization analysis of the newly designed MR break. Three parameters are considered to obtain the optimized breaking force. They are the pole pitch, number of poles and the flow gap of MR Fluid, respectively. The result of the simulation shows that in the optimization condition. By comparing with the commercial MR break, the performance of new MR break is 118% higher.

並列關鍵字

magnetorheological fluid(MRF) ； MR Brake

參考文獻

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