Papers by Keyword: Linear Motor

Abstract: This paper presents design solutions in the development of an electro-hydraulic power amplifier (EHPA) of a servo-hydraulic drive with hydrostatic guides. The work studies the characteristics and develops fundamental solutions to design elements and the general configuration of the EHPA, which is part of the servo-hydraulic drive. The paper analyzes the device, operating principles, and basic requirements for EHPAs. A digital model is built and a basic version of an electromechanical converter (EMC) is tested to assess its electromagnetic and thermal state. As a result of the work, the authors determined and justified the design of the main components of the EMC for the EHPA, developed a digital model for the EMС with permanent-magnet excitation, analyzed its electromagnetic and thermal state, and developed design documentation.

Abstract: This paper presents the development of a low-cost linear motor with precise – frictionless motion. The motor is constructed by two main modules: Compliant bearing and voice coil actuator (VCA). The mechanical property of the bearing is determined by its 6×6 stiffness matrix which is formulated based on the relationships between beam-type flexure elements within a compliant mechanism. To run the motor, a VCA is specifically designed to fit the desired dimensions and able to create enough input force for compliant bearings to reach their largest elastic deformation. Subsequently, the finite-element-analysis (FEA) is conducted to evaluate the performance of the motor through the simulations of bearing deformation and electromagnetic force from the VCA. The good agreement between analytical and FEA results demonstrates the correctness of the proposed design. With the low-cost due to the simple structure and the ability to produce frictionless motion, the motor presented in this paper can be considered as a potential candidate for the development of various applications in precision engineering field.

Abstract: A multi-section high efficient pumping unit was designed. The pumping unit has a multi-stage structure including forcer part of the use of linear motor and four-stage linear motor extract oil one after another. Consumption can be reduced and the operating efficiency of the machine can be improved. Each component of high efficiency linear pumping unit is introduced. Using power inverter to control pumping unit without complicated equipment and contact limit controller, pumping stroke adjustment can be realized. The control system adopts the vector control, high control precision and anti-interference ability.

Abstract: Taking efficient pumping-unit linear motor as the research object in this paper, SOLIDWORK has been used to establish 3D model and analyze multi-physics of the efficient pumping-unit linear motor, including vibration mode, stress analysis and the analysis of temperature field. Through the simulation analysis, getting efficient pumping unit linear motor of the top five order vibration frequency, pressure distribution and temperature distribution, theoretical references are provided for the analysis of the efficient pumping-unit linear motor. The innovation of the article is in coupling analysis of multi-physics.

Abstract: The vibration reason of the linear electric motor is analyzed for multi-stage linear pumping unit. A different order number expression of natural frequencies under wave action is given. Respectively, the finite element simulation software is used for linear motor and linear pumping machine of vibration characteristic analysis. Vibration quality participate coefficients of linear permanent magnet motor are provided under different frequency. Through the analysis, it shows that optimized motor structure can restrain vibration, so as to ensure the stability of multi-sections of straight beam pumping unit.

Abstract: The generation of heat source of high efficiency linear pumping unit was analyzed. The calculation method of motor loss and heat dissipation coefficient was given. The finite element analysis software was used to simulate and analyze the temperature field of the linear pumping unit in the phase of constant motion and the starting and reversing phase. According to the analysis, it was concluded that the reasonable optimization of linear motor cooling structure can ensure the good temperature characteristics.

Abstract: The paper points out a novel design methodology for electromechanical linear axis. It is based on common process parameters and an automated iterative solution algorithm. For the first time ever, different types of electromechanical linear axes can be compared. Furthermore, an optimum solution aiming a low moment of inertia ratio is the result of the design process. Using the example of a machining center, simulation and experimental results are shown. The performance of the process-oriented design methodology relating to additional design objectives is shown in this context.

Abstract: This paper deduces from Finite-Element Analysis (FEA), the influence of leading design parameters on the performance of a novel T-shaped permanent magnet (PM), quasi-Halbach magnetized tubular linear motor. The proposed motor is designed and developed for small reciprocating applications. In order to obtain the maximum power density, a two-dimensional Finite-Element model is developed to investigate the performance of the proposed machine. The proposed T-shaped PM structure has a higher power density as compared to the conventional rectangular-shaped PM structure. The losses of the motor, such as copper loss and iron loss, as well as the efficiency, are established as functions of a set of motor leading design parameters. It is shown that the developed motor produce satisfactory output power, around 85 W, which is enough to operate the direct-drive reciprocating compressor of a household refrigerator.

Abstract: This paper presents an innovative mechanical actuator using a shape memory alloy (SMA) with a cooling system based on combined thermoelectric effect and forced air cooling systems. The main advantages of using SMAs include the reduction of the system weight, the ease and reliability in application, and a simple control strategy. This study focuses on the development of the system highlighting the mathematical model of the actuator, and an experimental prototype was implemented. Several experiments are used to validate the model and to identify best SMA actuator configuration parameters. Experiments were used to evaluate the actuator closed-loop performance, stability, and robustness properties.

Abstract: In order to improve the response effectiveness, extend the workspace of parallel manipulator and make it more conveniently to be used in realistic tasks, this paper has introduced an improved mechanism based on the traditional 6-PUS, which applied the rails leaning outside and the linear motor as its driving system. This has optimized the initial parameters of the improved mechanism, and analyzed its workspace in the software Matlab using the method of cylindrical coordinate search. The result has a guiding significance in optimization of traditional parallel manipulators and the manufacturing of the new prototype.