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.
This paper proposes a system that can actuate itself with wirelessly received power. The system consists of two coils with different purposes; the power-receiving coil wirelessly receives power from the external sinusoidal magnetic field, and the actuation coil controls the current for 1D self-actuation. The actuation current has a square waveform and is controlled to be in phase with the external...
This paper presents a novel tubular flux-reversal transverse flux permanent magnet linear machine (FR-TFPMLM), in which both magnet and armature winding are located at the short primary side whereas the secondary side is composed of only magnetic steel. This configuration is typically used in long stroke applications to save magnet material. With different configurations of phase winding, the machine...
This paper presents the design, construction, and testing of a double-sided, dual airgap linear Vernier generator for wave energy conversion. Both the electromagnetic as well as mechanical design concepts are explored with a particular emphasis on the mechanical aspect given the fact that maintaining a dual airgap for this topology is challenging and has not been previously implemented.
Permanent magnet Vernier (PMV) machines have attracted more and more attention for their merits of high torque density and simple structure. And principle of electromechanical energy conversion is the most common way to investigate the PMV machine by calculating back EMF and electromagnetic torque. In this paper, a new perspective on the mechanism of PMV machines based on the Maxwell stress tensor...
Magnetic suspension pumps have been attracted attention and actively developed. These pumps can realize magnetic suspension and rotation of a rotor shaft integrated with an impeller without mechanical contact. There is now a need to develop a magnetic suspension pump that is capable of 5-axis active control while retaining a small size and low power output. However, conventional structures capable...
This paper describes a flexible tactile sensor in which magnetorheological and nonmagnetic elastomer layers are simply laminated on an inductor. This sensor has potentially high durability against shocks since the sensing part has only flexible elastomer layers and a printed circuit. Because the magnetorheological elastomer (MRE) contains iron powder, the distance between the MRE and the inductor...
The feasibility of zero-power control in flux-path control magnetic suspension is discussed. In the flux-path control magnetic suspension system, ferromagnetic control plates are inserted between a permanent magnet (magnetic source) and a floator and moved to vary the flux from the magnetic source to the floator. The zero-power control has been applied in active magnetic suspension with a DC electromagnet...
The magnetic levitation transport system is developed. In this system, by using the pinning force of the HTS, stable levitation and guide without control is realized. Propulsion force is generated by the interaction between the permanent magnet and the air core copper coil (propulsion coil). Since a larger propulsion force is required to improve the propulsion characteristics, the pinned flux of the...
Two permanent magnet linear machines, i.e. partitioned stator flux reversal permanent magnet (PS-FRPM) and conventional switched flux permanent magnet (SFPM) linear machines, are compared, in terms of electromagnetic performance and demagnetization withstand capability. It is found that compared to the conventional SFPM linear machine, the PS-FRPM linear machine shows lower cogging force, higher thrust...
Double-sided coreless linear motors have a crucial role in direct-driven precise linear motion applications. In this study, an optimum design effort focused on thrust force production is presented. For an applicable brushless linear motor structure, winding and permanent magnet (PM) dimensions which are providing the highest possible force are defined by using finite element analysis (FEA). It is...
Permanent magnet track linear motor drives are used in numerous industrial manufacturing processes covering a wide range of material handling and conveyor applications. A traditional solution is a permanent magnet linear motor (PMLM) in which the stationary part consists of permanent magnets and the moving part of the armature. To further reduce the initial costs of such a permanent magnet track linear...
In this paper we describe the design and development process of an electromagnetic picker for rivets. These rivets are used in a production process of leather or textile design objects like riveted waist belts or purses. The picker is designed such that it replaces conventional mechanical pickers thus avoiding mechanical wear problems and increasing the process quality. The paper illustrates the challenges...
This paper deals with an analysis of the design parameters and its influence on performance of the linear induction motor (LIM). LIM propels using Lorentz force generated by interaction between magnetic flux of the primary and eddy current induced in secondary. As depending on the size of the primary and the secondary, not only magnetic flux and induced eddy current, but also performances of the LIM...
We have been developing LIM-type eddy current rail brakes (LIM-ECBs). In this paper, we introduced our approach to simplify the numerical design for the armatures of LIM-ECBs and show the study of changing the number of poles under fixed external dimensions as a specific example.
The mathematical model of clamping electromagnets for clamping force determination on the basis of field theory means is offered for magnetically operated movers of mobile robots (MR) for moving on inclined or vertical ferromagnetic surfaces. The results of experimental investigations of magnetic induction and clamping force measurements in different spatial positions of clamping magnet relative to...
This paper investigates the cross-coupling effect of a 3 degrees of freedom magnetic bearing (3-DOF MB) using the magnetic circuit method comprehensively. The EMF of X-axis (or Y-axis) coil induced by the current variation Eix (Eiy) can vary in a range of up to 14.7% due to the cross-coupling caused by Z-axis current. Moreover, the X-axis (or Y-axis) force characteristics and stiffnesses are significantly...
In this paper, a novel flat linear switched reluctance motor with doubly-excited windings is presented. The simple structure of this motor has the advantages of the switched reluctance motor and the linear motor. The structure of doubly-excited windings also help to enhance the thrust force. The operating principle and schematic structure are shown in this paper. The thrust force is formulated by...
Recently, redundancy permanent magnet synchronous motor (PMSM) is widely applied in aviation. To improve the reliability of redundancy PMSM, the short-circuit current should be restrained via anti-short-circuit design. For the further optimization design of redundancy PMSM, it is essential to research the influence of anti-short-circuit design on the PMSM performance. Therefore, in this paper, two...
A hybrid high temperature superconducting (HTS) linear synchronous propulsion system composed of a HTS linear synchronous motor (HTSLSM) in the middle and HTS magnetic suspension sub-systems on both sides has been proposed for a high-speed maglev train. Four carriages have been made up for the proposed maglev, and each carriage consists of four HTSLSM modules, which weight 45 tons. The maglev train...
This paper investigates methods of magnet mass reduction in linear flux switching permanent magnet (LFSPM) machines by introducing tapered consequent poles. Based on the finite element analysis (FEA) three different models are designed, investigated and compared. The obtained results indicate that by adopting the proposed tapered ferromagnetic poles a considerable saving of material cost and weight...
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.