Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Alternator field disable. Modification method of difficult alternator type

saand · 12-25-2010, 07:45 AM

Hi All,
I have recently modified my alternator to allow field disabling which stops the alternator producing electricity and reduces the load on the drive train slightly.

There are some alternators which have a signal feeding into the unit to disable the field. Mine unfortunately did not have this signal as it is fairly old. To perform the modification i opened up the alternator and interrupted the field circuit at the brushes.

For others interested i wrote up the method in the wiki, its located here
Alternator Disable Switch - EcoModder

I am not yet sure how effective this mod is for reducing fuel usage however the modification does allow manual turning on and off of the alternator charging.

12-25-2010, 07:45 AM	#1 (permalink)
saand Wiki Writer Join Date: Jul 2010 Location: Melbourne, Australia Posts: 236 bugler - '91 Mazda 626 90 day: 35.89 mpg (US) Thanks: 15 Thanked 25 Times in 22 Posts	Alternator field disable. Modification method of difficult alternator type Hi All, I have recently modified my alternator to allow field disabling which stops the alternator producing electricity and reduces the load on the drive train slightly. There are some alternators which have a signal feeding into the unit to disable the field. Mine unfortunately did not have this signal as it is fairly old. To perform the modification i opened up the alternator and interrupted the field circuit at the brushes. For others interested i wrote up the method in the wiki, its located here Alternator Disable Switch - EcoModder I am not yet sure how effective this mod is for reducing fuel usage however the modification does allow manual turning on and off of the alternator charging.