Electronics > Projects, Designs, and Technical Stuff
Do modern car/boat alternators use PFC circuits?
oPossum:
The latest Mercedes I6 has no serpentine belt and uses a 48 volt electrical system.
Some of the benefits explained...
https://youtu.be/7PkX-NH6bE0?t=263
MagicSmoker:
--- Quote from: soldar on July 25, 2019, 04:06:10 pm ---PFC circuits exist in devices connected to the mains because the energy (current) has to be transported hundreds or thousands of Km from generation to consumption and PFC provides a reduction in power wasted in transmission.
In a car it makes no sense.
--- End quote ---
Yeah, excellent point... /discussion.
schmitt trigger:
I drove for 8 years a 2005 Honda Civic Hybrid.
The main electrical motor (BLDC) was sandwiched between the CVT transmission and the gas engine.
The vehicle had a start/stop function, and since the HP rating of the electrical motor was a significant portion of the engine's HP rating, it would start immediately and effortlessly.
Even so, the start/stop function could become annoying. Fortunately, it could be disabled. And the MPG loss, to the best of my recollection, was negligible.
Thus, I agree with previous posters that start/stop function is only a gimmick that auto manufacturers employ to game the economy ratings.
james_s:
My partner has a Prius which shuts off the ICE when the car is stopped but it doesn't bother me too much on those. The electric motor is sufficient on its own to get the car rolling which gives the ICE plenty of time to fire up. I'm still not convinced that all that complexity is worth the gains however it's a 2002 model still running the original traction battery and it has surpassed my expectations, being impeccably reliable.
On a non-hybrid the stop-start system exists only to game the system. I hope that eventually the rating system catches up and closes these loopholes because driving a car that has one of those is a terrible experience. Especially the more primitive ones that don't disable stop-start when the AC is running, every time you stop at a light the vents start blowing warm muggy air until the thing chugs and lurches forward when you step on the gas.
duak:
Which vehicles have belt start engines? Do they have a conventional starter too?
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