Motor Technology Research Articles

A Novel Approach to Shear-sensitive Fluids When Research and Industry Get Creative Together.

ZHAW Wädenswil, a pioneer in single-use technology, and Zurich-based LEVITRONIX, the world leader in bearingless motor technology, are developing a novel centrifugal pump with support from the Commission for Technology and Innovation (CTI). By increasing process efficiency, the pump sets new standards in biopharmaceutical production.

A Novel Bidirectional DC/AC Stacked Matrix Converter Design for Electrified Vehicle Applications

In the rapidly growing field of electrified transportation technology, hybrid electric and electric vehicle (HEV/EV) manufacturers have been placing increasing demands on the designers to improve the efficiency and reduce the costs of vehicle components to sustain a niche in the EV market. To understand the significance and challenges in an efficient and economical drivetrain design, this paper presents a part of an ongoing project that aims at developing a comprehensive study on dc/ac drive motor technology in EV applications. In this paper, a new three-level three-phase matrix converter topology, along with two conventional frequently used three-level three-phase dc/ac converter topologies, namely, diode-clamped and H-bridge converters, are implemented. Furthermore, comprehensive analysis and comparative studies are conducted to examine the performance and efficiency of these converter topologies according to EV design criteria. In addition, experimental investigations are carried out on the aforementioned converter configurations to help EV designers choose the most suitable converter topology.

A High Effcient Brushless DC Motor Drive Technology for Solar Array

This paper analyzes the working principle of solar array and drive requirements and presents an efficient drive technology of brushless DC motor for solar array. The technology solves the phenomenon of step-out in stepping motor control system. Brushless DC motor mathematical model is inferred and the possibility of driving solar array by brushless DC motor are analyzed in this paper. To achieve speed feedback loop control, reversing, over-current protection function, high-efficiency motor control chip are used in the system for brushless DC motor closed-loop control. Experimental results show that the system has simple structure and it can works in the harsh environments.

Induction Motors Versus Permanent-Magnet Actuators for Aerospace Applications

This paper introduces a comparative study on the design of aerospace actuators concerning induction motor and permanent-magnet motor technologies. In the analysis undertaken, the two candidate configurations are evaluated in terms of both their electromagnetic and thermal behaviors in a combined manner. On a first step, the basic dimensioning of the actuators and their fundamental operational characteristics are determined via a time-stepping finite-element analysis. The consideration of the thermal robustness of the proposed motor configurations is integrated in the design procedure through the appropriate handling of their respective constraints. As a result, all comparisons are carried out on a common thermal evacuation basis. On a second step, a single objective optimization procedure is employed, considering several performance and efficiency indexes using appropriate weights. Manufacturing and construction-related costs for both investigated topologies are considered by employing specific penalty functions. The impact of the utilized materials is also examined. The resultant motor designs have been validated through manufactured prototypes, illustrating their suitability for aerospace actuation.

Design of Controller of Permanent Magnet Brushless DC Motor for Electric Vehicle

In view of the defects of the electric car driver motor technology, considering actual needs of the car running, relaxing the electrical power density and the limitation of the moment of inertia etc, focusing on the reliability, speed range and high efficient operation area of the motor, based on the analysis of permanent magnet brushless dc motor operation principle, this paper designed a low cost, high intelligent electric car permanent magnet brushless dc motor controller. Through the analysis, simulation, experiment and comparison, the results show that the control system has good dynamic response and steady state properties.

Design of bridgeless IPMSM to reduce mass of applied permanent magnets

Interior permanent magnet synchronous motors (IPMSMs) are frequently used in industrial applications because their efficiency and power density are both very high. The IPMSM also makes a very good choice for an electric vehicle or hybrid electric vehicle, because the range of operating speeds is wide enough for use in traction applications. Recently, however, as a result of concerns about there being insufficient supplies of rare earth permanent magnets as well as atmospheric pollution caused by the exhaust gases of automobiles, a need has arisen for motor technologies that require fewer magnets and which can offer a higher level of efficiency. In this paper, we propose a bridgeless IPMSM as a means of reducing the number of permanent magnets used in a motor while simultaneously increasing the power density. The bridge structure, which supports the centrifugal forces generated in a motor’s permanent magnets as the rotor core rotates, was eliminated. To provide support for the separated pole-pieces and permanent magnets, new supporting structures are proposed. As a result, although the air gap torque of the bridgeless IPMSM is almost the same as that of the conventional design, the mass of the permanent magnets can be reduced by 10%.

Beyond Induction Motors—Technology Trends to Move Up Efficiency

Premium (IEC IE3 Class) efficiency Motors are now mandatory in North America. Super-Premium (IEC IE4 Class) and IE5 Ultra-Premium efficiency classes are defined in the second edition of Standard IEC 60034-30. For line-start fixed-speed applications, Super-Premium IE4-Class Line-Start Permanent-Magnet Motors and Squirrel-Cage Induction Motors are recent entrances in the industrial motor market. For variable-speed applications, IE4-Class Variable-Reluctance Synchronous Motors are also a recent entrance in the market. For the low power range, moving from IE4 to IE5 class, may require moving away from radial-flux induction motor technology, into to the permanent magnet and reluctance technology, either using Rare-Earth or Ferrite magnets. In this paper, efficiency analysis on the best available electric motors and emerging motor technologies, such as axial-flux permanent-magnet synchronous motors, is presented. The potential efficiency gain associated with several design options as well as a study on the theoretical efficiency limit achievable taking into account those existing design options are described.

Test of piezo-ceramic motor technology in ITER relevant high magnetic fields

In the framework of a Fusion for Energy (F4E) grant, a test campaign started in 2012 in order to assess the performance of the in-vessel viewing system (IVVS) probe concept and to verify its compatibility when exposed to ITER typical working conditions. ENEA laboratories went through with several tests simulating high magnetic fields, high temperature, high vacuum, gamma radiation and neutron radiation.A customized motor has been adopted to study the performances of ultrasonic piezo motors technology in high magnetic field conditions. This paper reports on the testing activity performed on the motor in a multi Tesla magnetic field. The job was carried out in a test facility of ENEA laboratories able to achieve 14T. A maximum field of 10T, fully compliant with ITER requirements (8T), was applied. A specific mechanical assembly has been designed and manufactured to hold the motor in the region with high homogeneity of the field. Results obtained so far indicate that the motor is compatible with high magnetic fields, and are presented in the paper.

Modeling and Optimized Design of a New Multi-DOF Deflection Type PM Motor

Based on the finite element analysis software, this paper innovatively proposes a multi-DOF deflection type PM motor with "6-8" rotor-stator structure and builds its finite element model. Furthermore, the distribution of the magnetic field of this motor are analyzed and calculated. To obtain better performance, the motor’s structure is optimized and designed with response surface methodology (RSM). Results of the proposed structure configuration are analyzed and compared with the initial model. It is expected that this research can be helpful to the multi-DOF motor or actuator technology study and improvements.

An orientable solar panel system for nanospacecraft

An orientable deployed solar array system for 1–5kg weight nanospacecraft is described, enhancing the achievable performance of these typically power-limited systems. The system is based on a deployable solar panel system, previously developed with cooperation between Laboratorio di Sistemi Aerospaziali of University of Roma “la Sapienza” and the company IMT (Ingegneria Marketing Tecnologia). The system proposed is a modular one, and suitable in principle for the 1U, 2U and 3U standard Cubesat bus, even if the need for three axis attitude stabilization makes it typically preferred for 3U Cubesats. The size of each solar panel is the size of a lateral Cubesat surface. A single degree of freedom maneuvering capability is given to the deployed solar array, in order to follow the apparent motion of the sun as close as possible, given the mission requirements on the spacecraft attitude. Considerable effort has been devoted to design the system compatible with the Cubesat standard, being mounted outside on the external spacecraft structure, without requiring modifications on the standard prescriptions. The small available volume is the major constraint, which forces to use miniaturized electric motor technology. The system design trade-off is discussed, leading to the selection of an architecture based on two independently steerable solar array wings.

CONVERSION OF AN ORDINARY N BICYCLE INTO AN ELECTRIC BIKE AND RELATED RESEARCH / DVIRAČIO PERDARYMAS Į ELEKTRINĮ IR JO TYRIMAS

An electric bicycle as a transport and leisure vehicle is expected to have a promising future. Currently, he market offers a great choice of factory electric bicycles and conversion kits to remake an ordinary bicycle into an electric bike. Also, the increasing number of electric vehicles is determined by the reduction in costs for manufacturing of batteries and an evolution in battery technology. This article presents the implementation of an electric bike by selecting the “Golden Motor Technology” company’s electric front wheel conversion kit MagicPie3 and 16 cell 10Ah LiFePO4 battery. After installation of the engine and other components, experiments were conducted to evaluate the performance characteristics of the electric bike and check the manufacturer’s specifications. Elektriniams dviračiams, kaip transporto ir laisvalaikio praleidimo priemonėms, prognozuojamos geros perspektyvos. Šiuo metu rinkoje yra didelis pasirinkimas gamyklinių elektrinių dviračių ir adaptavimo komplektų paprastam dviračiui perdaryti į elektrinį. Elektrinių transporto priemonių gausėjimą lemia tobulėjančios ir pingančios maitinimo elementų technologijos bei gamyba. Straipsnyje aprašoma, kaip dviratį perdaryti į elektrinį pasirinkus „Golden Motor Technology“ kompanijos 26 colių skersmens priekinio elektrinio rato adaptavimo komplektą MagicPie3 ir 16 celių 10 Ah LiFePO4 bateriją. Sumontavus variklį ir kitus komponentus atlikti eksperimentai, siekiant įvertinti technines elektrinio dviračio charakteristikas ir patikrinti gamintojo nurodytas specifikacijas.

The Test System of Submersible Motors Performance Based on LabVIEW

This paper introduces testing system of submersible motor that used for oil field based on virtual instruments. The system can detect, analyze, process and acquire data by national instruments’ graphical programming 1anguage，LabVIEW and DAQ board. It has a perfect man-machine interface. Because of its successful application in factory, work efficiency is improved greatly. IntroductionSubmersible motor is the power component of the submersible which performance affects the normal operation of the whole unit. With the development of production, varieties and yield of the machine are increasing and routine testing work is also increasing, but the test means has lagged behind. At present, the testing technology of submersible motor has been perfect in foreign, and able to provide the accurate performance curves to the user at the same time, At home, the dynamometer test of submersible motor is limited to some basic parameters measurement, and can not map the five characteristic curves of the motor accurately. Therefore, developing a set of rodless pump dynamometer system is necessary. The system is based on the NI company Labview software development platform and hardware platform, it can test automation and draw submersible motor performance curve accurately.

Atmospheric wet deposition of nitrogen and sulfur in the agroecosystem in developing and developed areas of Southeastern China

Atmospheric nitrogen (N) and sulfur (S) deposition is a significant and growing issue for ecological environment in many parts of the world such as China. However, the study on atmospheric deposition, especially N deposition, is still at the initial stage and usually neglected in agro-ecosystems. To assess the characteristics of N and S wet deposition in agro-ecosystems, we selected Yingtan Station (YTS) located in the developing area and Changshu Station (CSS) in the developed area as typical, agricultural study sites in Southeastern China during 2010–2011. In the two areas, the total N and S wet deposition were in ranges of 30.49–37.37 kg ha−1 year−1 N and 56.02–59.06 kg ha−1 year−1 S, respectively, surpassing their corresponding critical loads in China. The annual means of NH4+–N, NO3−–N and dissolved organic N (DON) deposition contributed 49.6%, 26.4% and 24.0% of the total deposition, respectively. Similar total N and S deposition data were observed in the two sites, but their N species, especially DON, were different due to different numbers of slaughter pigs and types of N fertilizers applied. In conclusion, DON was identified as an important contributor to the total N deposition and should also be monitored in the future. Such high N and S deposition would deteriorate agroecosystems in Southeastern China. Related political measures on livestock industries, managements of motor vehicles and technologies of coal and oil combustion should be improved timely and implemented effectively for reducing the regional N emission and deposition in the future.

HIL Simulation of Electric Bus Self-Adaptive Differential Technology

Having studied Adaptive differential technology of In-wheel motor driving midibus, analyzed the differences in terms of self-adaptive differential between traditional cars and in-wheel motor drive cars by comparison, introduced the method to realize the adaptive differential technology. By building the hardware in loop simulation of model electric bus, simulation including step steering, sine steering and steady turning conditions, we verify the in-wheel motor driving midibus under various driving conditions has good self-adaptive differential performance.

Development of a Rail Brake Derived from Linear Motor Technology

Studies have been carried out on a rail brake developed by applying a linear induction motor technology, called LIM-type rail brake. This brake is capable of generating braking forces without contact. In addition, this method decreases the rise in rail temperature, and on-board supply of electric power is not required by using dynamic braking. It is however necessary to install this brake in the limited space between front and rear wheels of the bogie. A prototype rail brake system was designed and built and its electromagnetic characteristics were examined on a test track in RTRI. These investigations revealed that the LIM-type rail brake could be applicable for practical use.

Back-EMF Position Detection Technology for Brushless DC Motor

Without position sensor control technology of brushless DC motor has become the focus of many experts and scholars at home and abroad. The article presented research of without speed and position sensor control for brushless DC motor, including brushless DC motor mathematical model, Back-EMF detection principle and starting position detection method, and designed a hardware control system based dedicated digital signal processor (DSP). For experimental study of the system based experimental prototype had shown: this method can achieve no load starting, load starting and load operation of without position sensor brushless DC motor.

Review of Electric Vehicle Technologies Progress and Development Prospect in China

Developing electric vehicles (EVs) has been chosen as national strategy as solution to energy security and urban air pollution by China. China has invested much to develop electric vehicle technologies. In past 15 years, the EVs technologies have improved greatly, and in public serving field, the electric vehicle were used in large-scale. The traction battery and electric motor technologies were improved distinguished. By the EVs demonstration programs, the mainstream technology roadmap in line with China’s national conditions is becoming gradually clear. In this paper, the progress of China EVs technologies breakthrough and industrialization, pushing policies (government and local government) were summarized. The progress on EVs demonstration program was reviewed and the effectiveness was evaluated. The technology roadmap of traction battery, fuel cell, and electric motor for EVs in past years was concluded. The different technological roadmaps were evaluated by effects in demonstration program. Based on the review of the progress of China EVs R&D and demonstration program, the existing problems and future challenges in EV development were put forth. And the future electric transportation in China was proposed, including electric powertrain technologies roadmap, electric car model strategy, EV industrialization strategy.

Simulation study on optimal placement and sizing of Battery Switching Station units using Artificial Bee Colony algorithm

The improvements on DC electrical motor and battery technologies have increased the industries’ and users’ interest in Electrical Vehicle (EV). In line with this, multiple types of Charging Stations (CS) have also been introduced to support the EV’s growth in the vehicle market. Three types of CS units that are available nowadays are Levels 1, 2 and 3 (DC Charging type). However, there are some drawbacks on these CS types either in terms of charging time (for Levels 1 and 2) or the impact to the system performance (Level 3). Thus, the Battery Switching Station (BSS) is used to tackle all these problems. In the BSS, the customers’ current batteries are swapped with fully charged batteries by the automated system and the charging process of those batteries will be done at a later time by the BSS. Therefore, the long charging time issue can be evaded. However, inappropriate placement of BSS in the distribution network will give enormous impact to the distribution network due to the lower voltage level in distribution system. Two methods have been used to place the BSS in this study, which are, analytical and meta-heuristic (Artificial Bee Colony (ABC)) methods. The ABC is chosen due to the simplicity of the algorithm in finding the optimal location of BSS. For further improvement, the ABC is employed to find the optimal size of BSS and DG output. The results show that the analytical and optimization methods gave similar results in finding the optimal location of BSS, which is better than randomization of BSS placement. Furthermore, the analysis on optimal size of BSS and DG output (simultaneously) gives the lowest power loss compared to other analyses.

Research of Rod Pump Load Reducing Technology on Deep Wells

As the sucker-rod pump placement depth increases, the load at the polished rod rises as well. Meanwhile, high load at the polished rod limits further increase of pump placement depth. This paper mainly analyses polished rod load on pumping system units and describes several methods to reduce beam pump load that are used in deep wells. On the basis of theoretical analyzing of three load reducing technologies such as application of compound fiberglass sucker rods, linear electric motors and rod load reducer, it was determined that using compound fiberglass rods in real practical cases shows obviously higher efficiency than other two. linear electric motors technology has advantages of being used in deep wells as well. Moreover rod load reducer shows good performance in deep wells, but because it does not possess energy conservation characteristic it may be uneconomic and less effective during production.

Electric motor technology in a high-performance application

Electric motor technology in a high-performance application