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| Switched reluctance motors will save the planet? |
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| EEVblog:
Someone sent this in for debunk as a "scam". Not putting this in the Dodgy Technology section, because it sounds more like over the top startup marketing wank than anything else? https://turntide.com/ https://www.prnewswire.com/news-releases/software-motor-company-smc-has-rebranded-to-turntide-technologies-as-it-brings-the-smart-motor-system-to-market-to-solve-for-energy-inefficiencies-in-todays-motors-and-reduce-carbon-emissions-301097158.html I haven't done any more thought or investigation than skimming the video. |
| Zero999:
--- Quote ---Over 47% of the world’s electricity is consumed by analog motors. These legacy motors haven’t fundamentally evolved since the 19th century, and they waste half the energy they consume. --- End quote --- The only motors less than 50% efficient are those really cheap and crappy ones found in toys and cost tens of pence. :palm: Most decent sized motors have much higher efficiencies, often above 95%. |
| Kleinstein:
The efficiency of motors depends a lot on size. Larger motor are quite efficient, like > 90%. 50% efficiency is more like a thing of very small cheap motors like 100 W range. I point where quite a bit can be saved is with speed control in things like fans and pumps, though with pumps there are limits to this as the pump part often also need a certain speed range. Here a switched reluctance motor can very well compete with a conventional induction motor with electronic drive / inverter. The 3rd competing technology with even slightly higher efficiency (especially in small size) are brush-less permanent magnet motors. Switched reluctance motors are already available for quite some time - I remember a shop vacuum cleaner that is available from before 2000, though relatively expensive. The control needs a little effort, but no AI or anything magic or new. |
| lsnair:
https://new.abb.com/news/detail/1789/ABB-motor-sets-world-record-in-energy-efficiency-saves-half-a-million-dollars |
| wraper:
--- Quote from: Zero999 on July 27, 2020, 08:31:14 am --- --- Quote ---Over 47% of the world’s electricity is consumed by analog motors. These legacy motors haven’t fundamentally evolved since the 19th century, and they waste half the energy they consume. --- End quote --- The only motors less than 50% efficient are those really cheap and crappy ones found in toys and cost tens of pence. :palm: Most decent sized motors have much higher efficiencies, often above 95%. --- End quote --- I can add shaded-pole induction motors with 15-30% efficiency. Consume about half of max power without any load at all. Run hot as hell. Used in almost every convection oven fan, axial AC fans and in most of 120/230V AC water pumps in washing machines and dishwashers. |
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