Advanced Technology R and nter

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Advanced Technology R and nter

United States
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Kaneyama T.,Automotive Electronics Development Center | Kondo R.,Advanced Technology R and nter
Mitsubishi Electric Advance | Year: 2014

We have developed a new isolated AC/DC converter for electric vehicle on-board chargers. It consists of an AC/DC converter with Gradationally Controlled Voltage Inverter (GCVI AC/DC converter) and an isolated Zero-Voltage-Switching (ZVS) DC/DC converter, each of which is optimally controlled to convert in a highly efficient means. As a result, the new on-board charger has achieved a power conversion efficiency of over 94%.

Tamida T.,MItsubishi Electric | Tamida T.,Advanced Technology R and nter | Osuga H.,MItsubishi Electric | Yamamoto N.,Kyushu University | And 3 more authors.
Journal of Propulsion and Power | Year: 2015

A new pulse-synchronous driver system is proposed for Hall thrusters.By applyingapulsating drive voltage with a frequency close to that of the discharge oscillation, the stable and synchronized operation of a Hall thruster can be realized. A pulsating boost chopper circuit is also proposed that is suitable for use as a pulse-synchronous drive and has many attractive features as the driver circuit for Hall thrusters. Moreover, it is demonstrated that the thrust performance is improved approximately 30% at 200 W input power by using the driver circuit. Pulse-synchronous driving isa new driving method optimized for thruster operation, and it is expected to become anessential technology for high-power Hall thrusters. Copyright © 2014 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

Tanino Y.,Advanced Technology R and nter | Nishimae J.-I.,Advanced Technology R and nter | Yamamoto T.,Advanced Technology R and nter | Tamida T.,Advanced Technology R and nter | And 2 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

In this paper, we provide a detailed review of development of a highly-efficient high-power nanosecond pulse CO2 laser using transverse-flow radio-frequency (RF)-exited laser amplifiers, which is for extreme ultraviolet (EUV) light source of a next generation of nano-lithography. High-density excited high-power transverse-flow CO2 lasers were designed and built for the application of laser produced plasma (LPP) EUV source. We carried out an amplification test of the transverse-flow CO 2 laser seeded by a nanosecond pulse CO2 laser. A four-amplifier system generated an average output power of 21 kW with an electrical input power of 400 kW for discharges. The electrical-to-optical efficiency was 5.2%. The input pulse laser had an average power of 46 W, the repetition rate was 100 kHz, and the pulse duration was 15 ns. The transverse-flow CO2 laser has strong points in high gain and availability of the multi-fold optical path. A highly-efficient amplification was experimentally proved characterized by transverse-flow CO2 laser amplifiers even with low-power seed. A transverse-flow CO2 laser is a promising candidate for an amplifier in the LPP EUV light source. © 2014 SPIE.

Oh M.O.,Hanyang University | Oh M.O.,Advanced Technology R and nter | Kim S.H.,Hanyang University
Polymer International | Year: 2014

Uniaxially drawn polylactide (PLA) films were prepared using various draw ratios (2, 3, 4 and 4.5) at a constant draw rate and temperature. It was confirmed that the conformational structure of the PLA films prepared using the uniaxial drawing process was composed of the α'-phase form. The conformational structure deformation of α'-phase PLA films, according to the various draw ratios used, was investigated in terms of strain-induced crystalline behavior and molecular orientation analysis. It is of utmost importance to confirm the α'-phase structural deformation caused by the uniaxial drawing process because it directly relates to the characteristics of PLA films. The conformational structure deformations of the α'-phase, created by uniaxial drawing, led to improved mechanical properties, as evident from mechanical testing and dynamic mechanical analyses results. © 2013 Society of Chemical Industry.

Uehara Y.,Advanced Technology R and nter | Mukuda M.,Advanced Technology R and nter | Tsukasaki T.,Manufacturing Engineering Center
Mitsubishi Electric Advance | Year: 2012

Mitsubishi Electric has developed advanced recycling technologies for the plastics recovered from used home appliances, namely, separation of plastic types, processing for RoHS compliance, and product applications. These technologies help to recover a large amount of high-quality recycled plastics and the expansion of their application to products. By combining them with the technology to recover rare earth magnets from air conditioner compressors, we will promote self-closed loop recycling of electric home appliances.

Oh M.O.,Hanyang University | Oh M.O.,Advanced Technology R and nter | Kim S.H.,Hanyang University
Polymer (Korea) | Year: 2016

From poly(lactide) (PLA) and poly(ethylene carbonate) (PEC) synthesized using Co2, a PLA/PEC blending film is prepared by melt extrusion and then drawn to uniaxial orientation with various draw ratios. The structural conformation was confirmed and the mechanical, thermal and barrier properties were investigated. It was confirmed that the PLA/PEC blending sheet and films were composed of α′ phase form. The strain-induced crystallization and molecular orientation of PLA/PEC films of α′ phase increased with increasing the draw ratio. It improves the physical properties of the film. With amorphous PEC blending, the mechanical properties of PLA/PEC blending films were slightly lower than those of net PLA films, however, the flexibility and barrier properties were higher. In this study, the PLA/PEC blending film is expected to be commercialized as an ecofriendly flexible packing film. © 2016 The Polymer Society of Korea. All rights reserved.

Lee J.G.,University of Seoul | Lee J.G.,Advanced Technology R and nter | Kim S.H.,University of Seoul | Kang H.C.,Advanced Technology R and nter | Park S.H.,University of Seoul
Macromolecular Research | Year: 2013

Melt-extruded poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blend films were prepared at different rutile (titanium dioxide, TiO 2) concentrations for use as a protective sheet on a photovoltaic cell and module. The rheology, structure, morphology, crystalline behavior, thermal, and mechanical properties of PVDF/PMMA/TiO2 composite films were investigated through reflectance difference spectrometer (RDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), scanning electron microscope (SEM), and color spectrometry. The results showed that the blended material and its film have favorable thermal and mechanical properties. The TiO2 is finely dispersed in the composite, as shown by the crystalline regions of the PVDF and the homogeneous amorphous regions consisting of PVDF and PMMA, resulting in advantageous and optical properties of PVDF/PMMA/TiO2 composite films. However, the TiO2 can also greatly narrow the thermally stable region of the PVDF in PVDF/PMMA/TiO 2 composite film because of the catalytic decomposition effect. The tensile strength and elongation at break are higher than those of a PVDF/PMMA blend as TiO2 content increases. Increases in the crystalline behavior and rheological properties appeared below 20 wt% TiO2 content. [Figure not available: see fulltext.] © 2013 The Polymer Society of Korea and Springer Sciene+Business Media Dordrecht.

Yonezawa T.,Advanced Technology R and nter | Kawajiri K.,Advanced Technology R and nter
Mitsubishi Electric Advance | Year: 2014

A new method has been proposed and experimentally verified for evaluating the amount of adhered fuel when the fuel spray is injected from an automotive injector and impinges on the wall surface. It has been confirmed that the proposed method can describe the relationship between the incident angle of the spray droplet and the amount of adhered fuel on the wall, which is not possible by the conventional simulation.

Domae Y.,Advanced Technology R and nter
Mitsubishi Electric Advance | Year: 2013

We have developed a 3-D sensing technology suitable for industrial robots. The motion stereo method is capable of 3-D measurement using only one camera, and thus is a useful and cost-effective method; however, its application to industrial robots has been impractical because of the difficulty in synchronizing the timing between taking an image and capturing the position. We propose an improved motion stereo method that has overcome the problem by using images asynchronously captured during the motion. This method achieves stable 3-D measurement with an S/N ratio improved by 16 times and a noise level reduced by 94% compared to the conventional method.

Chung C.,Advanced Technology R and nter | Kim Y.-H.,Advanced Technology R and nter | Ki T.-H.,Advanced Technology R and nter | Bae K.,Advanced Technology R and nter | Kim J.,Advanced Technology R and nter
2011 18th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2011 | Year: 2011

This paper presents a ultra low power 900 MHz RF transceiver IC. The IC harvests energy from 900 MHz RF carrier wave. The IC has -17 dBm minimum read operation power sensitivity. Analog function blocks, a digital baseband, and a memory system operate with 0.8 V ∼ 2.0 V supply voltage range without voltage regulator. Only current-starved ring oscillator operates 0.6 V with calibration. Most of analog blocks adopted low power subthreshold operating design. The memory system is chosen 512-bit Fowler-Nordheim tunneling non volatile memory (NVM). Digital baseband is designed to clock gating, clock recovery, balanced power distribution, and adaptive power consumption methodology. The transceiver IC is implemented in the 0.18-μm CMOS technology. The overall power consumption of designed IC is only 2.64 μW at 0.8 V supply voltage. The chip size is 0.65 mm x 0.65 mm. © 2011 IEEE.

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