1. Enjoy XS650.com? Consider making a donation to help support the site.
    Dismiss Notice
  2. Hey Facebook people... We've created a group for XS650.com members to connect. Check it out!
    Dismiss Notice
Donate Facebook Group

Mosfet Regulator?

Discussion in 'The Garage' started by Tomterrific, Jan 11, 2021.

  1. Jan 11, 2021 #1
    Tomterrific

    Tomterrific XS650 Junkie

    804
    102
    43
    Columbus, Ohio
    Will a mosfet regulator work with a capacitor? My SR500 could use a better regulator and I was able to score a 5 wire regulator on Amazon. But since the mosfet works different it could need a battery instead of a capacitor

    The SR has a 3 phase permanent magnet alternator like some modded XS. The mosfet works as a series regulation, opening the circuit. A normal regulator uses shunt regulation. The mosfet should run the alternator cooler. I'm not sure if I have this right so please correct.

    Thanks,
    Tt
     
    Tomterrific, Jan 11, 2021
    Tomterrific, Jan 11, 2021
    #1
  2. Jan 12, 2021 #2
    Max Midnight

    Max Midnight XS650 Addict

    261
    166
    43
    Cumbria, UK
    I would say yes; the V Max has a three phase alternator and the OE r/r is swapped with a MOSFET type without issues so I would assume it would be the same for a SR500.
     
    Max Midnight, Jan 12, 2021
    Max Midnight, Jan 12, 2021
    #2
  3. Jan 12, 2021 #3
    MacMcMacmac

    MacMcMacmac Laconic

    397
    272
    63
    Ottawa,Canada
    What's the part number on your regulator?

    Don't confuse mosfet and series regulation. Plenty of mosfet regulators are shunt. The mosfet shunt regulators run cooler themselves but do nothing to help out the stator. It seems to me a regulator that switches the alternator on and off would be working at cross purposes to a capacitor and no battery setup, but I'm often wrong. Also, a lot of those ebay/Amazon regulators turn out to be shunt even when they are advertised as series, which is just plain fraud in my opinion.
     
    MacMcMacmac, Jan 12, 2021
    MacMcMacmac, Jan 12, 2021
    #3
  4. Jan 12, 2021 #4
    MacMcMacmac

    MacMcMacmac Laconic

    397
    272
    63
    Ottawa,Canada
    I didn't mean to sound judgemental, but a lot of people have been burned by fake Shindengen SH775 look alike regulators off of Ebay which turn out to be shunts.
     
    MacMcMacmac, Jan 12, 2021
    MacMcMacmac, Jan 12, 2021
    #4
  5. Jan 13, 2021 #5
    Tomterrific

    Tomterrific XS650 Junkie

    804
    102
    43
    Columbus, Ohio
    That is good information. I was naive enough to think mosfet meant series. Of course it could be a common shunt regulator with a mosfet. Well I needed a regulator anyhow and this was only $27.

    Tt
     
    Tomterrific, Jan 13, 2021
    Tomterrific, Jan 13, 2021
    #5

Share This Page