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In this work, metallic glass films (Zr-Cu-Al-Ni) were successfully deposited and patterned by sputter and reactive ion etching (RIE) technologies for widening micro electro mechanical system (MEMS) field. The amorphous structure of the deposited Zr-based alloy films were confirmed by X-ray Diffraction (XRD) and transmission electron microscopy (TEM). The home-made RIE equipment was used to dry etch...
In this paper, the development of multi chemical sensing method using a single quartz resonator and micro flow channel has been reported. In the developed device, samples pass through two capacitors mounted as sensing parts in a microchannel with a time lag. Connecting the capacitors to the single quartz resonator, one can obtain frequency change ΔF of the resonator as time lag signals depending on...
This paper reports the development of monolithic methanol concentration sensor for direct methanol fuel cell (DMFC). An interdigital capacitor and a resonator are fabricated on a single quartz crystal substrate. Methanol concentration can be measured by the frequency change of the resonator because the change corresponds to the dielectric constant change of the capacitor connected in series to the...
The Power Supply Working Group, created inside the Cooperative Study Group on “Applied Simulations of Power Electronics Systems” of IEEJ, is developing practical simulation examples of power supply circuits. The simulation examples have the following key features: (1) Parameters in the simulation examples are thoughtfully set to practical values so that one can readily carry out practical simulations...
This paper provides a standard motor model, parameters, and a design of controllers for simulation of motor drive systems. In the motor drives working group of Investigating R&D Committee on applied simulation for power electronics systems in IEEJ, standard models for simulation of motor drive systems have been discussed. Parameters of more than 330 motors have been gathered from among released...
The goal of this research is a proposal of a standard model for vehicle system simulations. Recently, the CO2 reduction and efficiency improvement of the energy consumption are important subjects in development of the vehicle systems. The new technologies related to vehicle development have continued to increase in complexity. For these reasons, the energy management simulation by the coordinated...
Authors developed a segment type switched reluctance motor (SRM) as a rare earth less motor. The object is to reduce the acoustic noise and vibration as well as improve the torque characteristics. In this paper, we propose the performance improve method using grain-oriented electric steel as the segment core. The validity is confirmed experimentally.
Authors developed a novel segment type switched reluctance motor (SRM) as a rare earth less motor. The torque was increased by 40% and the radial force was decreased by 76% compared with the same size VR type SRM. Increasing the average torque, however, caused increasing torque ripple. In this paper we propose a 4-phase segment type switched reluctance motor and show that the torque ripple can be...
Recently, an Interior Permanent Magnet (IPM) motor, since the ability to combine the reluctance torque and the magnet torque, is applied on various applications. It is necessary to improve the torque and the efficiency as total drive system, in order to approach to the energy issue. This paper presents an evaluation of torque and efficiency characteristics as total drive system. The phase control,...
The vehicle system is a multi-domain system, so that computer simulation technique has become an indispensable tool for vehicle system development. Our research group proposed a simulation modeling method based on the VHDL-AMS language. This paper describes how VHDL-AMS is used to model of vehicle fuel consumption simulation. We examine the influence of the power-network with electrical load and hill...
About Permanent Magnet Type Synchronous Machine, especially the generator is required to decrease THD of EMF wave form. In this paper is expressed about Fractional Slot Windings, to improve the THD performance without increasing the slot numbers at multi-poles design. The Prototype is for the middle speed drive train for Wind Turbine, then THD and Efficiency performance is inspected and reported.
A Matrix Converter (MC) is an AC-to-AC conversion device that can generate variable magnitude and frequency output voltage. In order to reduce the EMI and to improve the efficiency, the soft switching technology is used. The auxiliary resonant commutated pole (ARCP) is applied to a MC and ARCPMC has been proposed. This paper aims to clarity the experimental output characteristics at wide output command...
This paper proposes a method for estimating the quantitative values of some attributes associated with surface qualities of an object, such as glossiness and transparency, from its image. Our approach is to learn functions that compute such attribute values from the input image by using training data given in the form of relative information. To be specific, each sample of the training data represents...
The authors developed a novel segment type switched reluctance motor (SRM) as a rare earth less motor. The torque was increased by 40% and radial force was decreased by 76% compared with the same size VR type SRM. In this paper we propose a new type rotor using grain-oriented electric steel for the segment core. We compare the torque and efficiency characteristics with a non-oriented electric steel...
Fractional Winding is used for permanent magnet type synchronous machine to improve the EMF form and cogging etc. This paper report the characteristics of q=1/2 and q=3/8 (q<0.5) especially. And the mixed coils in each phase winding we called, can give the flexibility of winding design. We report the advantages of this winging method with theory and measured data.
The vehicle system is a multi-domain system that requires many branches of science and engineering. Therefore the development of the vehicle system requires the use of design methodologies that utilize simulations, which have grown increasingly sophisticated in recent years. This paper describes how VHDL-AMS is used to model of vehicle fuel consumption simulation. This model consists of the power-train,...
An EPS system requires large electrical power depending on steering torque. Recently, the required steering torque is getting larger especially for luxury sedans and large Sports Utility Vehicles. In heavy vehicles, the steering without driving and the emergency steering are becoming a very heavy load for a conventional 12V battery system. Therefore, it is important to estimate the battery power management...
The ability to control of the behavior of living cells in vitro is critical in fundamental cell biology as well as applied biotechnology including tissue engineering and cell-based chip devices. Patterning cells on surfaces is one of the most important approaches to modulate cell behaviors and functions in culture. Here, we describe ongoing work on the newly developed surface patterning technique,...
Proton beams with reasonable parameters are chosen here as energy drivers for fusion reactors whose output powers are 10 MW, 100 MW and 1000 MW. In view of stopping powers of proton beams, a model of cryogenic pellet structure is proposed and pellet gains are estimated by using a one-dimensional hydrodynamic code. The conditions to form a plasma channel and its stabilities are examined to propagate...
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