New motor technology is spurring other changes to power tools
Synopsis: While working with Eric Constans on his test of brushless impact drivers in this issue, Mark Schofield talked to a lot of engineers at various power-tool companies about brushless motors in power tools. He learned that the introduction of brushless motors is connected to two other changes in tool technology. Lithium-ion batteries are also evolving, as are the electronics that govern the trigger, motor, and battery.
Electric motors have to be one of the most reliable machines ever made. A few years ago, I picked up an old metal jigsaw at a tag sale. The owner apologized that it hadn’t been used since her husband had passed away 30 years earlier. I plugged it in and away it went, just like new. so why would anyone want to replace this tried-and-tested motor with one that’s more complicated and costs more to make? In a word, efficiency.