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Electric motors, just like any other motor have moving parts. End of discussion. Their purpose is to move things. Less moving parts doesn't mean "practically n
by 4ad 5y ago
Electric motors, just like any other motor have moving parts. End of discussion. Their purpose is to move things.
Less moving parts doesn't mean "practically no moving parts", as the idiotic article claims.
Coincidentally, the brushes which wear out on DC engines are not moving, it's the commutators that move and wear out the brushes...
...but cars use BLDC motors (which are induction motors or variants thereof) and not DC motors anyway... Brushed DC motors are only used by forklifts and similar equipment (although more recently they started to move to brushless designs too).
A DC motor and an induction motor have the same number of moving parts. It's not the number of moving parts that matter, but the fact that moving parts don't have to touch each other.
- SigmundA 5y agoI believe the difference in moving parts between a combustion engine and electric motor is about two orders of magnitude (20 vs 2000). I would say "practically no moving parts" is an ok term in relative comparison but thats just my opinion. There isn't really a debate, as far as size, weight, complexity and maintenance electric motors win over combustions engines. The problem of course is the battery size cost and weight compared to a gas tank. Bottom line though electric cars have much less maintenance and much of that can be attributes to much less moving parts.
- Gibbon1 5y agoBig difference between electric motors and piston engines is sliding friction. Even the journal bearings in a piston engine are only partially lubricated. Which means they wear wear quickly. Compare with fully lubricated bearings which have a service life that's 10-100 times longer.
- beaconstudios 5y agoThe wording in the article is imprecise with regard to the number of working parts, but everybody knows that motors move things so your point is needlessly pedantic.