Christine and Scott Gable are hybrid auto and alternative fuel experts who have brewed their own biodiesel and traveled 125,000 miles on waste vegetable oil. Electric vehicles rely exclusively on ...

[Robert Murray-Smith] doesn’t like the price of inverters to convert DC to AC. That led him to build a dynamotor, or what is sometimes called a motor-generator set. These devices are just DC motors ...

このところ、実売で2万円を越えるような高価なDC(直流)モーターの扇風機が人気となっている。従来型の扇風機は、AC(交流)モーターと呼ばれるモーターで羽を回しており、数千円で買えてしまうのに――だ。 もちろん、高価なのには理由があって、DC ...