Abstract
Magnetorheological fluid (MR) has been developed and applied in various systems on vehicles such as suspension, engine mount and heavy-truck seat. However, due to its small maximum torque, conventional MR brake currently cannot be successfully applied on vehicles. In this paper, a multi-pole MR brake for motorcycle has been proposed. The targeted MR brake not only provides sufficient braking torque, but also maintains an acceptable size. With unique operation concept, two brake designs of the new MR brake, one has inner-rotor structure and another has outer-rotor structure, have been designed and analyzed for its application feasibility. For the ease of verification in braking performance, a comparison procedure was built in which braking torque is evaluated based on the torque-to-volume ratio. Magnetic simulation results show that the two designs can certainly reach the targeted torque while the one with outer-rotor structure has better compact design. This design proves its feasibility for using on motorcycle brake system.
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