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Hi Jeff, the three phase motor will only be a few percent more efficient, however the motor heat rejection isn’t the issue.
A good motor will only reject about 10% of the cyclone energy through losses, the cyclone will reject the other 90% to the shop.
The majority of the heat is due to the air compression and frictional losses, my dust extractor rejects just over 1,200 watts into the shop….Rod
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