A multi-pole magnetorheological clutch powered by permanent magnets and excitation coils

Abstract

This article presents a new design of a multi-pole magnetorheological (MR) clutch, with a hybrid magnetization using several permanent magnets and several excitation coils. The permanent magnets are used as the first source of generating the magnetic field, and the excitation coils are used to adjust the magnetic field to the required value. Firstly, a detailed illustration of the mechanical design of the MR clutch is presented. The principal design parameters of the proposed clutch are determined to achieve maximum torque according to the magnetic circuit. After that, the torque model is established, and simulations are conducted to evaluate the magnetic circuit design. Subsequently, an experimental set-up is established, and the proposed MR clutch is designed and manufactured, and a series of experiments are carried out. The results clearly show that different torque output can be obtained by controlling the current magnitude and direction of each coil. Finally, to achieve a precise feedback torque control, the design of a current controller is carried out using conventional proportional-integral-derivative (PID) control scheme. The results demonstrate that the designed PID controller can be used to obtain the desired torque.

A Study on Power Transmission Control for Applying MR Fluid Multi-Plate Clutch to Automobile Power Distribution Device

“…However, in the fluid mode, torque transmission is performed by the MR fluid between the discs and the plates; therefore, it is necessary to compute the torque values at all locations. Accordingly, the fluid mode transmission torque T MR − m is the value obtained by adding all the torque values acting on the spaces between the discs and the plates, as shown in Equation (10).…”

“…Shuyou Wang et al proposed a shear-mode MR clutch with a uniform magnetic field distribution along the radial direction for a tension control system based on a detailed analysis of the axial magnetic induction intensity generated by the coil along the radial distribution [9]. Jie Wu et al presented a new design of a multipole magnetorheological (MR) clutch with hybrid magnetization using multiple permanent magnets and multiple excitation coils [10]. Enrico Galvagno et al proposed a new methodology for evaluating dual-clutch transmission vibrations during gear shifting.…”

Design and performance evaluation of a multi-disc magnetorheological fluid brake for A00-class minicars

“…Actually, the braking performance of the disc-type MRB is affected by various factors. Such as the working temperature (Wang et al, 2017), the gap size between two discs (Kikuchi et al, 2011), the magnetic particle distribution induced by the centrifugal effect (Tian et al, 2021), the current magnitude and direction of each coil (Wu et al, 2023), and so on. Among these factors, the temperature effect is reported to has a significant impact on the torque output performance of the MRB since the MRF is a temperature-dependent material (Wang et al, 2014).…”

Experiment and analysis of drop-weight damping control of MR semi-active impact resistance-based hydraulic actuator

“…Experimental tests showed the proposed control method can obtain excellent buffer performance. Wu et al [26] designed a multi-pole MRF clutch by using a hybrid magnetization method of permanent magnet and excitation coil, and obtained different torque outputs by controlling the current magnitude of the excitation coil. Xu et al [27] proposed a semi-active pseudo-negative stiffness control strategy based on MRD to solve the problem of low damping output in cable ties vibration control, and showed the advantages of better high damping efficiency of the proposed controlled model.…”