No Magnets, Big Power: BMW’s Fifth-Generation Electric Motor (2022)
These brushed motors generate fine dust like a brake pad in very slight but constant use:<p>&gt; We asked BMW about the life expectancy of those brushes and commutators, and what happens to the dust as they wear. While they couldn&#x27;t give us a lifetime estimate for the brushes, they did reassure us that the brush modules are &quot;in an enclosed and sealed compartment, eliminating dust contamination inside the stator&#x2F;rotor wiring.&quot; Anyone who has worked with brakes or even brushed DC motors knows just how fine those dust particles are. It will be interesting to see both how long they last and just how much dust those modules will actually contain (or release).