Power transmission for mechanical systems often involves the use of clutching- or dissipative-elements to protect drive systems and provide steady output power. As standard implementations in motor-driven systems, these devices operate passively or in discrete states, providing limited controllability to the power output. This paper presents a magnetorheological-fluid-based differential (planetary) gear transmission which serves to variably couple motor power through a sun gear input to a load affixed to a planet carrier output. This is achieved both rapidly and continuously through controlled slippage between the ring gear of the device and its casing. Compared to conventional MR clutches, the unique functionality of the differential gearbox enables use of an MR brake with lower inertia than an in-line clutch. Through control of current supplied to the energizing electromagnet of brake component of the transmission, simple and reversible governing of output torque and speed is achieved. This behaviour is modelled and verified through testing, showing a 349% variation in brake torque for constant speed tests from the off state to the maximum capacity of the device, with a 262% variation in brake torque under a harmonic input displacement also observed. The versatility of the device demonstrated through PID speed and torque control.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.