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This paper investigates the possibility of utilizing a switched reluctance (SR) motor made of permendur. Motor torque, iron loss, and efficiency of the SR motor are evaluated by finite element method (FEM). Furthermore, a suitable structure for the SR motor made of permendur is presented.
Summary A QCT-based nonlinear FEM was used to assess vertebral strength and mechanical parameters in postmenopausal women. It had higher discriminatory power for vertebral fracture than aBMD and vBMD. Alendronate effects were detected at 3 months, and marked bone density increases were noted in juxta-cortical areas compared to inner trabecular areas. Introduction QCT-based finite element method...
This paper presents a novel switched reluctance (SR) motor which has permanent magnets between the stator pole-tips. The proposed SR motor has large torque and high efficiency in comparison with the conventional one. Neither induced voltage nor cogging torque is produced in spite of the existence of the permanent magnets. First, the effect of the permanent magnets is explained by finite element method...
The sphere of robotics is widely spreading in many fields, such as medical field, an amusement field, industrial robot and so on. As such a tendency growing, the motion patterns of the robots are required to be more human-friendly. For designing the motion unit capable of generating a multi-degree-of freedom (MDOF) motion, the volume of each actuator and the work condition have to be considered. Ultrasonic...
Some considerations on 8/6 switched reluctance (SR) generator excited by a suppression resister converter (SRC) is presented. Finite element method is used to calculate the symbols at the dc excitation voltage VDC=30 V. It was found that there is good agreement between the calculated and experimental results.
The analysis of multi-leaf structures should be performed taking friction into account. The objectivity of friction law should be preserved because large deformation generally occurs. By use of the convected coordinate system, the objectivity can be preserved naturally. Therefore, in finite element analysis, the element local coordinate system can be used. However, when a contact point slides over...
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