The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Spherical actuator is a device that can achieve multiple degree-of-freedom (DOF) rotary motions in a single joint. It has a bright application prospect on moment gyros and satellite systems. Cylindrical shaped PM pole is widely used because of easy fabrication and pattern of magnetization. However, its topology and structure cause difficulties in accuracy magnetic modeling. Thus, the structure optimization...
This paper presents a force model of three-degree-of-freedom (3-DOF) spherical actuator. Due to the friction between rotor and stator decreases the torque output of spherical actuator, in order to increase output torque, we can use levitation force in reasonable control to decrease the friction. This paper proposes three components of magnetic flux density based on Laplace equation. A force model...
Spherical actuator is a device that can achieve multiple degree-of-freedom (DOF) rotary motions in a single joint. This paper proposes a spherical actuator with approximated dihedral cone shaped rotor. To formulate the magnetic field in three dimensional space, Laplace equation is used. By adding the fundamental terms, a more accurate numerical model is set up. It is validated by FEM results in three...
This paper proposes a novel permanent magnet (PM) spherical actuator with an outer rotor. The employment of outer rotor helps to increase the magnetic flux density, and thus to improve the torque output. The investigation of the magnetic field distribution is important for the performance analysis and design of the spherical actuators. The general solution of magnetic scalar potential in 3D space...
Unlike conventional two-dimensional (2D) magnet array in electromagnetic spherical actuators, a novel 3D magnetic pole array is proposed to improve the actuator torque output. This paper proposes a mathematic modeling method based on the equivalent energized coil and Biot-Savart law to formulate the complex magnetic field distribution of the spherical rotor in 3D space. The energized coil model is...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.