EPH - International Journal of Science And Engineering (ISSN: 2454 - 2016) http://ephjournal.com/index.php/se <p><strong> <span id="cell-1-name" class="gridCellContainer"> <span class="label"> EPH - International Journal of Science And Engineering (ISSN: 2454 - 2016)</span></span></strong> publishes a wide range of high quality research articles in the field (but not limited to) given below: Biology, Physics, Chemistry, Pharmacy, Zoology, Health sciences, Agriculture and Forestry, Environmental sciences, Mathematics, Statistics, Animal Science, Bio Technology, Medical Sciences, Geology, Social Sciences, Natural sciences, Political Science etc.<br><span style="font-size: 1.5em;"><strong> <span style="text-shadow: #ff6600 0px 0px 3px;">Current Impact Factor: 2.435</span></strong></span></p> en-US <ul> <li>All contributor(s) agree to transfer the copyright of this article to <strong>EPH Journal.</strong></li> <li><strong>EPH Journal</strong> will have all the rights to distribute, share, sell, modify this research article with proper reference of the contributors.&nbsp;</li> <li><strong>EPH Journal</strong> will have the right to edit or completely remove the published article on any misconduct happening.</li> </ul> editor@ephjournal.com (Naeem Akhtar) info@ephjournal.com (Naveen Malik) Tue, 27 Feb 2018 12:35:08 +0000 OJS http://blogs.law.harvard.edu/tech/rss 60 Design and implementation of high power density motor drive http://ephjournal.com/index.php/se/article/view/485 <p>Based on the demand of low-voltage, small-size and high-current motor drive in the vehicle-mounted servo system, the low-voltage and high power density motor drive, which used TMS320F2812 of TI as the control unit, Incremental encoder and small-value, high-power sensor resistor as motor speed and current acquisition unit, low-voltage and high power density MOSFET as driving unit, was designed and implemented. The hardware of driving system was introduced in details, and then the designs of high-density PCB, structure and technology, with relevant speed control of nested segment and parameters testing procedures, were employed to improve the driver integration and reliability. A DC servo motor with a rated current of 20 amps is used as a test motor. The experimental results indicate that the driving system has the advantages of high steady-state accuracy and stable load response.</p> Ruan Shihao, LIU Weiting, Wei Haifeng, Yan Pengyu, Yao Jinyi ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-nd/4.0 http://ephjournal.com/index.php/se/article/view/485 Wed, 28 Feb 2018 00:00:00 +0000 EFFECT ON PERFORMANCE MEASURES DURING DIE SINKER EDM OF AMMC BY EXTERNAL DIELECTRIC FLUSHING SYSTEM http://ephjournal.com/index.php/se/article/view/498 <p><strong>One of the important parameter in electrical discharge machining (EDM) of aluminium metal matrix composites is dielectric flushing pressure which is often not given attention due to its inbuilt presence inside the EDM set-up. Present work investigated the effect on material removal rate, tool wear rate and surface roughness with the variation of dielectric flushing pressure during EDM of 10wt.%Al<sub>2</sub>O<sub>3</sub>/AA2014. The composite was manufactured via mechanical stir casting route. For carrying out experiments on the available die sinker EDM to observe the influence of flushing pressure, a new external flushing system was developed to achieve high pressure.&nbsp; Kerosene oil was used as dielectric oil instead of EDM oil supplied with the machine. Only pulse current (I) was varied as an EDM input parameter considered whereas voltage (V), pulse on time (T<sub>on</sub>) and pulse off time (T<sub>off</sub>) were kept constant. It is found that material removal rate invariably increases with an increase in flushing pressure of dielectric oil whereas surface roughness behaves opposite. However, no significant differences are observed for tool wear rate.&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;</strong></p> Akhil Khajuria, Ankush Raina, Modassir Akhtar ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-nd/4.0 http://ephjournal.com/index.php/se/article/view/498 Wed, 28 Feb 2018 12:19:53 +0000