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 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...
Needle-free jet injection allows delivery of liquid drugs through the skin in the form of a narrow fluid jet traveling at high speed, minimizing the risk of accidents. The use of a controllable actuator to drive this process has many advantages, but the voice coil actuators previously used are too large and heavy for practical use with common injection volumes (∼1 mL). We instead propose a compact...
This paper describes a simple ripple compensation method of suspension force and torque in a bearingless surface-mounted permanent magnet (SPM) motor with two-phase integrated winding configuration. Only two H-bridges or eight power transistors are used for the proposed topology. The neutral point of each phase is connected to the middle point of the power sources to superimpose the suspension and...
Linear Electric Submersible Pump is a new industrial solution in artificial lift applications. Linear motors are placed downhole to drive the reciprocating pump directly. This system is intended to overcome some of the sucker rod pump limitations. The new configuration will allow implementation in deviated and off-shore oil wells. Integrated Drive-Motor technology shows many promising advantages....
Stator and translator pole width have a great effect on the LSRM's performance. However machining error and assembly error usually cause some dimensional difference among stators and translators. Thus a speed control method immune to dimensional difference is proposed for a four-phase linear switched reluctance motor (LSRM) with different pole width in this paper. The LSRM designed in such a structure...
Bearingless motors combine in the same structure the characteristics of conventional motors and magnetic bearings. Traditional bearingless machines rely on two independent sets of winding for suspension force and torque production, respectively. The proposed Multi-Sector Permanent Magnet (MSPM) motor exploits the spatial distribution of the multi-three-phase windings within the stator circumference...
Permanent magnet track linear motor drives offer a cost-effective motion control solution in numerous industrial manufacturing processes, covering a wide range of material handling and conveyor applications. To further reduce the initial costs of a permanent magnet track linear motor drive system, discontinuous magnet tracks can be considered. However, in a discontinuous magnet track, the armature...
Based on the field-oriented control (FOC) theory of the PMSM, the paper firstly analyzes the mathematical model of the permanent magnet linear synchronous motor (PMLSM), and then it designs the platform of the linear motor servo drive to accomplish the PMSLM operating characteristics, including both steady state and dynamic state. Comprehensive test results verify the rationality and feasibility of...
This paper compares the air gap field, magnetic radial force and vibration between SPM and IPM machines having 6-pole/54-slot winding topology together with the identical stator but different rotor topologies. A simplified analytical method is analyzed and its results are validate by Finite element method. It is shown that the vibration of the IPM is much higher than that in SPM when motor is in on-load...
This paper investigates single-sided ironless linear synchronous motor (ILSM) based on permanent magnet Halbach array used for medium-speed maglev. Long primary ironless coil is laid along the track and the Halbach permanent magnet array is attached to the bottom of each bogie as a source of traction, two dimensional analytical model of single-sided ILSM is established used to calculate the characteristics...
This paper presents the development of the single side ironless Halbach permanent magnet linear synchronous motor (PMLSM) for a novel electromagnetic suspension (EMS) maglev vehicle. The basic structure of the propulsion motor and the vehicle are firstly described. Then the thrust and normal force of the ironless PMLSM are analyzed. The configuration of the propulsion system and field oriented control...
A novel configuration for reducing end-effect detent force for a high thrust transverse flux linear synchronous motor is presented. The method is based on principle of destructive superposition of harmonic orders in detent force waveform. It is achieved by splitting a linear motor, with a high slot-pole combination into three separate sections, allowing enhanced degree of freedom to mitigate end-effect...
This paper presents the design and testing of a high force linear fine-tooth iron-core permanent magnet motor. We present the design and experimental results in comparison with a commercially-available iron-core linear motor. Our new fine-tooth motor shows predicted shear stress improvements of 28 % at the prototype practical power level of 10 W/mm and 85 % at an anticipated ultimate root mean square...
Eccentric mass unbalance of the electric motor causes vibration of the shaft and the whole system, when the rotational speed increases. This paper considers rotation about an estimated center of inertia for a bearingless motor to reduce the vibration and power consumption for magnetic suspension. A 12-slot/10-pole bearingless SPM motor is selected for the performance test, because it has low suspension...
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 linear motors (PMLM) are widely used in high precision machineries. With the removal of the transmission elements, the positioning performances of PMLM are easily affected by parameter variations and external disturbances. Various control approaches were proposed, yet it was noticed that majority of these controllers have complex design procedures, and require accurate model parameters...
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...
There are not so many cryogenic linear pumps, because linear pumps need a high power for driving themselves compared to centrifugal pumps. Then, we try to apply superconducting coil to a linear motor for cryogenic pump. Static and dynamic characteristics about the linear motor are discussed. The total linear motor system composed of the linear motor, a PID controller, a displacement sensor and a power...
This paper deals with the electromagnetic, mechanical, and cooling solutions for an innovative direct-drive suited for steering gears on board ships. The work is comprised in a research project funded by the Italian Navy. The research aims to realize a full-electric and oil-free drive for actuation of hydraulic loads in the perspective of “more green ships”. The electrical drive proposed is based...
With the high power density and the simple structure, complementary and modular linear flux-switching permanent magnet (CMLFSPM) motor is especially suitable for urban rail transit application. A high dynamic performance of the system is significant in transportation system. Compared to the flux-oriented control, the Direct Thrust Control (DTC) method has fast torque response and is scarcely influenced...
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.