In this research, a high compact configuration of brake featuring MR fluid (MRB) is proposed. The proposed MRB consists of a rotor with multiple trapezoidal teeth acting at multiple magnetic poles of the brake. Two counter coils are placed on each side-housing of the brake. The inner face of each side-housing also has trapezoidal shape mating with the trapezoidal teeth of the rotor via MRF layer. By applying counter currents to the two coils, a magnetic fluid is generated with magnetic flux going across the MRF layer (MRF duct) between the rotor teeth and their mating poles on the housing. By using multiple poles with trapezoidal shape, a high braking torque of the brake is expected while the size of the brake is still kept to be compacted.
After a review of MRB state of the art, configuration of the proposed MRB is presented. The modeling of the actuator is then derived based on Bingham rheological model of MRF and magnetic finite element analysis (FEA). The optimal design of the MRB is then performed in order to minimize the mass of the MRB when braking torque is constrained to be greater than a required value. From the optimal design result, performance characteristics of the actuator is simulated and compared with previously developed MRB.
Quoc Hung Nguyen, Ngoc Diep Nguyen, Bao Tri Diep, Hoai Bao Phan, and Seung Bok Choi, "Development of a novel magneto-rheological brake with multiple pole rotor ," Proc. SPIE 10602, Smart Structures and NDE for Industry 4.0, 106020E (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 06, 2018; Published: 3 April 2018); https://doi.org/10.1117/12.2297326.5763122830001.
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