Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"maximum torque"”.
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Maximum torque of combination threats for spur gear based on AGMA and JGMA standards
… 2013. The most important data is the allowable torque applied on the gear tooth which can be distinguished into causing either one of the tooth failures mentioned above. Several materials selected from the JGMA and AGMA standards with high value of allowable contact stress compared to its …
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Torsional Testing of Race, K3 and Profile Nickel Titanium Endodontic Files
… the handle was held in freely rotating chuck. Torque was applied with the Instron Universal Tester in a counter-clockwise direction to simulate the direction of torque encountered clinically. The crosshead speed was set to produce 2 rotations per minute until fracture occurred. The maximum …
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Design study of the proposed 12slot-14pole field excitation flux switching machine (FEFSM) for hybrid electric vehicles
… Furthermore, the profile of flux linkage,cogging torque, torque versus Ja at various Je characteristics and torque versus power characteristics are observed and analyzed based on 2D-finite element analysis (FEA). The improvement design is done by using the “deterministic optimization method” to …
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Design improvements of 12 slot-14 pole hybrid excitation flux switching motor with 1.0 kg permanent magnet for hybrid electric vehicles
… electric vehicles(HEVs). The design target of maximum torque is 333Nm, a maximum power of more than 123kW, and a maximum power density of more than 3.5kW/kg. The performance of the proposed machine on the initial design and improvements design are analysed based on 2-D Finite element analysis …
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The investigation of valve operators' torque production capabilities and optimal handwheel height, angle, and opening technique
… and trunk muscles; and (2) determine whether the torque setting (15 Nm and 30 Nm) of the valve affects the preferred valve-opening method. Four methods were evaluated, including using bare hands (BH), conventional wrench-restricted (CW-R, assumes presence of obstructions), conventional …
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Design study of outer rotor field excitation flux switching motor for electric vehicles
… of the improvement design shows that the maximum torque is obtained 118.2165 Nm which is greater than the initial design that obtained 72.788Nm, whereas the maximum power has achieved about 77.65kW.
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Design study of hybrid excitation flux switching motor for electric vehicles
… is applied in this project to gain the high torque of the system. This is because the flux was achieved from both permanent magnet and field excitation coil. The design of 6 slot 7 pole inner rotor hybrid excitation motor is analyse by using the JMAG Designer Software which is a simulation …
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A new structure of 12Slot-10Pole field-excitation flux switching synchronous machine for hybrid electric vehicles
… motor in IPMSM used for LEXUS RX400h with a maximum torque of 210Nm with a 4:1 gear reduction ratio, 123kW maximum power, maximum power density of more than 3.5kW/kg, and a maximum speed of 20,000 r / min. To optimize the design, the design parameters of the rotor, the armature and the FEC …
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Torque -Angle Based Analysis and Control of Induction Machines
… field-oriented control (FOC), and direct-torque control are the most popular induction motor control methods. One common feature that is shared by these control methods is to regulate the amplitude of the flux in the induction motor. There are numerous techniques to improve the …
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Design of a frameless torque motor
… designer must obtain a design which will supply maximum torque for the available power input. The designer must determine the optimum rotor outside diameter, magnet size, rotor stack length, slot size, and all other internal dimensions of the motor. Economics dictate that the engineer may work on …
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Some aspects of wind tunnel magnetic suspension systems with special application at large physical scales
… thesis.<br/>A powerful method of magnetic roll torque generation is essential for any LMSBS. Two variants of the new Spanwise Magnet scheme are studied herein. Spanwise Permanent Magnets are shown to be a practical method and are experimentally demonstrated using the Southampton University MSBS, …
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Design improvement of outer-rotor hybrid excitation flux switching motor for in-wheel drive electric vehicle
… driving. The main necessities are to have high torque density and efficiency, since the motors are installed directly to the wheel. Because of high torque possibility is required; a design of outer-rotor hybrid excitation flux switching motor for in-wheel drive electric vehicle is suggested in …
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Brushless doubly-fed reluctance machine drive for turbo-electric distributed propulsion systems
… permanent magnets. This thesis investigates the torque production in BDFRM, discusses machine modeling and drive control architecture, and reports on an initial sizing of a 1.5 MW motor. However, the BDFRM has inherently poor torque density because of machine saturation, even at low …
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Torque Architecture For The Propulsion Supervisory Controller Of An Independent Axle All-Wheel Drive Electric Vehicle
… power moding, transmission range selection and torque architecture are discussed. For the torque architecture, different torque distribution strategies are explored in detail. Initially, a comparison of torque distribution strategies considering positive torques only, is used to assess the …
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Characterization of the microstructural properties that are predictive of regain in strength in phosphate-deficient mice
… that appears to be part of a process in which maximum torque and work to failure undergo a compensatory phase in which these two mechanical properties are significantly higher than in non-fractured, control limbs. The overshoot in maximum torque and work to failure is part of an adaptive …
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Design of segmental rotor and non-overlap windings in single-phase fefsm for low torque high speed applications
… in order to overcome the drawbacks of low torque and small power performances due to their longer flux path in the single-phase FEFSM using salient rotor structure and overlap windings arrangement. The objectives of this study are to design, analyse and examine performance of the proposed …
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Fast and strong lightweight robots based on variable gear ratio actuators and control algorithms leveraging the natural dynamics
… on state feedback, to move with minimal motor torques and to adjust the output impedance appropriately given a task. The proposed approach exploit variable transmissions not merely for increasing maximum torque and speed, but also to significantly alter the dynamic properties, including load …
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Optimization-based biomechanical evaluation of isometric exertions on a brake wheel
… hand grip, subject anthropometry, and hand brake torque level upon predicted compressive force at L3/L4. An analysis of variance revealed that compressive force was significantly affected by each of the experimental variables. Additional analyses at subjects' maximum voluntary torque levels …
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A new three phase 6-slots 10-poles permanent magnet flux switching machine with inner rotor configuration
… stator teeth. Still this structure produces less torque and power. Hence, the use of multiple rotor structures has been developed, along with proposed PM configurations, which give significant gains. This research work focused on a new design of PMFSM employing alternate circumferential and radial …
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Control Strategies and Parameter Compensation for Permanent Magnet Synchronous Motor Drives
… for a particular application. Derivations for maximum speed, maximum current requirements, maximum torque and other performance indices, are presented based on the CPL concept. High performance drives require linearity in torque control for the full range of operating speed. An analysis of …
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