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Electromagnetic actuators are able to meet demanding requirements, such as operations in very high temperatures. For such applications, it is necessary to know how the load capacity of the actuator is influenced by the operating temperature. This paper presents a nonlinear magnetic circuit model of an electromagnetic actuator and its experimental validation when the actuator is operating in a high-temperature...
A micro-robot is a promising device for minimally invasive surgery or drug delivery inside of the body for medical purpose. Due to its small size, the micro robot should float in the blood vessel to destination. Therefore, the propulsion mechanism of micro-robot have become an active area of study these days [1][2]. Recent studies of the propulsion of these robots have focused on the insertion of...
Radial forces due to rotor eccentricity (or unbalanced magnetic pull) are a common source of noise and vibration in a permanent-magnet synchronous motor [1]. Previous works on radial forces due to eccentricity use an approach of harmonic superposition [2] or the assumption of linear variation in magnetic fields according to eccentricity [3]. In this paper, we use a perturbation theory to find a closed-form...
This paper deals with the characteristics analysis and optimum design of axially laminated anti-rib (ALA) Synchronous Reluctance Motors (SynRM) with consideration to centrifugal force and its effect on the flux path. The rotor core of an ALA type motor is fixed directly to the shaft axis. As the rotor rotates at a speed of 3,000rpm, the rotor receives a centrifugal force of approximately 147.16[kN]...
Electromagnetic actuators are versatile and able to meet demanding requirements, such as operation in very low or very high temperatures. When the actuator is used in a high-temperature environment, we need to know how the force-producing capability of the actuator is influenced by the operating temperature. Previous research works [1-2] fail to show the dependence of the actuator force on the temperature.
Stroke or other neurological disorders potentially lead to movement deficits that may be recovered through proper rehabilitation. Robotic therapy has been applied to larger limbs such as the arms but not as commonly for the hand. It has been shown that virtual robotic environment with feedback distortion has a positive therapeutic effect in single finger movement. To expand this one finger therapeutic...
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