Hitachi Archives – The Green Optimistic green tech news, since 2008 Fri, 19 Apr 2013 15:58:23 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 2667534 Hitachi’s New, More Efficient DC Motor Control System Could Improve EVs https://www.greenoptimistic.com/hitachi-dc-motor-control-system-20130419/ https://www.greenoptimistic.com/hitachi-dc-motor-control-system-20130419/#respond Fri, 19 Apr 2013 15:58:19 +0000 https://www.greenoptimistic.com/?p=36450 For the most part, electric vehicles use an invertor to change the direct current coming from the battery pack to alternating current to power the electric motor. Direct current [DC] motors are more efficient than alternating current [AC] motors, but aren’t found very much in electric vehicle application because they waste energy starting up and […]

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]]> https://www.greenoptimistic.com/hitachi-dc-motor-control-system-20130419/feed/ 0 36450 Hitachi’s New Electric Motor Not Using Rare Neodymium, Could Lower Market Prices https://www.greenoptimistic.com/hitachi-ferrite-motor-neodymium-20120413/ https://www.greenoptimistic.com/hitachi-ferrite-motor-neodymium-20120413/#respond Fri, 13 Apr 2012 11:09:52 +0000 https://www.greenoptimistic.com/?p=23993 A new, highly-efficient permanent magnet synchronous motor has been unveiled by Hitachi. Nothing unusual so far. The only big and important difference between Hitachi’s new motor and everything that exists in the industry is that this one doesn’t have neodymium magnets. Neodymium magnets contain a rare-earth material, which is the cause for its high price […]

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]]> https://www.greenoptimistic.com/hitachi-ferrite-motor-neodymium-20120413/feed/ 0 23993 New Cerium Oxide CO2-Adsorbing Material Created by Hitachi 13 Times More Efficient https://www.greenoptimistic.com/hitachi-cerium-oxide-adsorbent-20120403/ https://www.greenoptimistic.com/hitachi-cerium-oxide-adsorbent-20120403/#respond Tue, 03 Apr 2012 18:33:30 +0000 https://www.greenoptimistic.com/?p=23819 A new CO2-adsorbing material based on cerium oxide has been created by Hitachi. It has been designed to capture the CO2 produced by coal-fired plants and the company says it’s 13 times more efficient than old zeolitic solid adsorbents. Because old materials adsorb moisture existing in the gas, they’re not very good at separating CO2 […]

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]]> https://www.greenoptimistic.com/hitachi-cerium-oxide-adsorbent-20120403/feed/ 0 23819 Hitachi Develops New Hi-Power Battery for PHEVs https://www.greenoptimistic.com/hitachi-lithium-ion-rechargeable-battery-phevs-20100114/ https://www.greenoptimistic.com/hitachi-lithium-ion-rechargeable-battery-phevs-20100114/#respond Thu, 14 Jan 2010 21:06:51 +0000 https://www.greenoptimistic.com/?p=6236 Hitachi Vehicle Energy Ltd and Hitachi Ltd have developed a lithium-ion rechargeable battery that has a high output density and a high energy density for PHEVs (plug-in hybrid electric vehicles).

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