Breakthrough in Electric Motor Efficiency?
I had a wonderful seafood breakfast this morning at Moby Dick’s in Santa Barbara, with two folks whose start-up is built around an apparent breakthrough in electric motors. I’ve been on the lookout for just an improvement, as, in truth, few serious innovations have taken place since Edison and Tesla “did their thing” in this space about 120 years ago.
But is this the one? I’m always skeptical, as there are so many criteria at stake. Obviously, a breakthrough should mean a dramatic reduction in cost. But it shouldn’t take up more space, use rare materials, weigh more, constitute a safety hazard, or require a ton of exotic electronic controllers. And certainly, more efficiency would be nice; that’s the real kicker. The real cost of the motor lies in running it over the course of its life, rather than in the device itself. Of course, the motors we have in our electric vehicles are already over 90% efficiency, but a great number of those we use in our day-to-day lives, e.g., motors for pool filters, are under 50%; that leaves lots of ground to be made up.
I just checked this out to verify. Here’s the spec sheet for a popular pump motor, the Pentair. Let’s pick the WFE-4 at random, and note that it draws 14.8 amps at 115 V = 1702 Watts, but only puts out 1 HP, (746 Watts) = 44%. Lots of room for improvement, to say the least.
I’ll keep you posted.