Timeline for What makes automotive alternators so inefficient relative to other applications?
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
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| Mar 15, 2023 at 15:51 | history | made wiki | Post Made Community Wiki by Voltage Spike♦ | ||
| Nov 19, 2017 at 23:04 | comment | added | Charles Linquist | I performed a LTSPICE simulation and found that I could greatly increase efficiency by using FETs to act as boost converters,using the coils inductance as the converter's inductors. I ran the switcher at about 22 Khz and used synchronous rectification. | |
| Nov 19, 2017 at 21:21 | comment | added | Diego C Nascimento | @solarmike Yes some ECU controls the alternator, I believe that by controlling excitation current. But 10 HP is much power, some air intake systems not cheap, are designed to add less than this. Also today with more electronic devices, the demand for electric current is growing, as well as a better efficiency. | |
| Nov 18, 2017 at 22:10 | comment | added | Solar Mike | And that is why some alternator charging control systems do exactly that ie match output precisely with the needs of the car and battery , not only that some also cycle the air conditioning load as well, but it depends a lot on the price and quality of the car : the charging system on my car does match itself to the load and battery needs very precisely, in fact it also charges at up to 15.2 v at some points - before you ask yes I have an accurate meter... | |
| Nov 18, 2017 at 20:44 | comment | added | Charles Linquist | But I would think that when cars are shedding all the weight they can, every HP saved would make a measurable difference in mileage. This looks like an area ripe for the application of electronics. | |
| Nov 17, 2017 at 20:11 | comment | added | Solar Mike | alternators are not designed for efficiency - they are normally bolted to an engine of some 150+ bhp and so who cares if they take 10 or 15.... Oh and they are not constant current either... | |
| Nov 17, 2017 at 18:10 | review | Late answers | |||
| Nov 17, 2017 at 20:10 | |||||
| Nov 17, 2017 at 17:48 | history | answered | Charles Linquist | CC BY-SA 3.0 |