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Unicorn converted to DC Headlight. Help to increase battery charging rate.

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  • Originally posted by kauria View Post
    Well thanks for your support.
    AC line (Headlight) from magneto goes to stock RR is above +14 volt, but after RR regulated current is 12.xx volt, increase with the RPM but not cross 13 volt. Now I connect this out put to the AC input of my custom RR and found a DC out put above +40 volt. I tried a H4 bulb with this direct output and bulb glows normal, so the amperage is low though it is +40 volt.

    Now my question is, is it OK to put this high out put voltage to battery for charging? I fear that it will fry the battery soon.

    Next, I tried this setup for say five minutes without putting this to battery, found that the capacitor is very hot but the diodes are Ok, Though I have check the polarity properly.
    That is perfectly OK. That 40V is the spikes from the stock RR unit. Connect it to the battery, now measure the voltage. It should now not cross 14.x V even after a minute or 2. Also, a capacitor is not something to be played with. Do not connect and disconnect the rectifier with the engine ON. Let us know.
    Your biking tells a lot about the person you are!

    Comment


    • Originally posted by abhijeet080808 View Post
      That is perfectly OK. That 40V is the spikes from the stock RR unit. Connect it to the battery, now measure the voltage. It should now not cross 14.x V even after a minute or 2. Also, a capacitor is not something to be played with. Do not connect and disconnect the rectifier with the engine ON. Let us know.
      Ok, thanks,
      Now one my friend suggests that this circuit is wrong and he suggest me that I should connect the –AC input as per the picture. And he connect the same and we test it, we got the 40-42 volt DC output, but after disconnecting the same the output is just half say 20-22 volt DC. Now he suggests that this way the complete bridge rectification process is done. Kindly suggest.
      He also suggests me to put a charging circuit after this DC converting process, which will charge the battery as per the requirement. Things make complicated to me.
      Another question, capacitor shows a temp unit printed in its body, in my case its 85 degree C. What does it mean, does it withstand up to 85 d c. I found that it was very hot in within 5 minutes.
      Please help.
      Last edited by kauria; 11-19-2009, 12:15 PM.
      sigpic

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      • One thing, what is last diode end connected to?

        BTW, I suggest a simple circuit for you.

        RR Unit AC o/p pin ------------> Diode anode

        Same Diode cathode ------------> Battery +ve.

        H/L wire from RR unit AC o/p is disconnected and connected to the Batt +ve.

        Got it? Just a single diode. Let me know.

        And yeah cap limit is 85 deg C. There is some theory behind this, but will take some time to explain.
        Your biking tells a lot about the person you are!

        Comment


        • Originally posted by abhijeet080808 View Post
          One thing, what is last diode end connected to?

          BTW, I suggest a simple circuit for you.

          RR Unit AC o/p pin ------------> Diode anode

          Same Diode cathode ------------> Battery +ve.

          H/L wire from RR unit AC o/p is disconnected and connected to the Batt +ve.

          Got it? Just a single diode. Let me know.

          And yeah cap limit is 85 deg C. There is some theory behind this, but will take some time to explain.
          One diode to boost charging? No bridge? Will it..........?
          Do it Yourself, what so ever, if Possible
          -----------------------------------------
          sigpic
          After Market HID Projector Mod for Pulsar 150
          Flasher Enabled Head Light Flash for Just Rs.1/-

          Comment


          • As i said long funda. One diode will basically create a half wave rectifier. A 4 diode bridge rectifier on the other hand is a full wave one. But the stator light coil should not be grounded to use it as a full wave rectifier. As it is already grounded, it works as a half wave rectifer only. So, i suggested him to use a half wave rectifier diectly. Atleast circuit is easier to make. But you loose 50% efficiency too.

            Best is 4 diode bridge rectifier with ungrounded lighting coil. I have explained it in short form.
            Your biking tells a lot about the person you are!

            Comment


            • Originally posted by abhijeet080808 View Post
              One thing, what is last diode end connected to?

              BTW, I suggest a simple circuit for you.

              RR Unit AC o/p pin ------------> Diode anode

              Same Diode cathode ------------> Battery +ve.

              H/L wire from RR unit AC o/p is disconnected and connected to the Batt +ve.

              Got it? Just a single diode. Let me know.

              And yeah cap limit is 85 deg C. There is some theory behind this, but will take some time to explain.
              Wow, is it so simple?
              I dont think, this will help, cause the diode will heat up very fast, and soon will got burn, well i will check and let u know.
              Thanks
              Check the pic, did u mean this?
              SORRY FOR THE HAND SKETCH
              sigpic

              Comment


              • Wow! A cute diagram there! Use 6A4 diode. Didn't heat up in my case. Try it out and see.
                Your biking tells a lot about the person you are!

                Comment


                • Originally posted by abhijeet080808 View Post
                  Wow! A cute diagram there! Use 6A4 diode. Didn't heat up in my case. Try it out and see.
                  Still wonder why it didnt happend to ur case. When I tried a bridge to the light wire from RR, the light wire heats up as if I shorted the wire. I couldnt even check the output
                  Do it Yourself, what so ever, if Possible
                  -----------------------------------------
                  sigpic
                  After Market HID Projector Mod for Pulsar 150
                  Flasher Enabled Head Light Flash for Just Rs.1/-

                  Comment


                  • Dude, must be a wiring problem. Else, I can not really say!
                    Your biking tells a lot about the person you are!

                    Comment


                    • Originally posted by abhijeet080808 View Post
                      Dude, must be a wiring problem. Else, I can not really say!
                      May be, but I changed the RR only, no other mods
                      Do it Yourself, what so ever, if Possible
                      -----------------------------------------
                      sigpic
                      After Market HID Projector Mod for Pulsar 150
                      Flasher Enabled Head Light Flash for Just Rs.1/-

                      Comment


                      • Got a new APE RR Unit yesterday night. Waiting for the weekend to work on my Uni.

                        Fingers crossed

                        Cost of APE RR - 600rs

                        Comment


                        • Originally posted by Shreeni0403 View Post
                          Got a new APE RR Unit yesterday night. Waiting for the weekend to work on my Uni.

                          Fingers crossed

                          Cost of APE RR - 600rs
                          Nice start, u could've done the rewinding first and see the result atleast for the confirmation of AC lighting.
                          Do it Yourself, what so ever, if Possible
                          -----------------------------------------
                          sigpic
                          After Market HID Projector Mod for Pulsar 150
                          Flasher Enabled Head Light Flash for Just Rs.1/-

                          Comment


                          • Originally posted by sajanjosepht View Post
                            Nice start, u could've done the rewinding first and see the result atleast for the confirmation of AC lighting.
                            While doing rewinding, i will go with stock electricals.

                            Comment


                            • Originally posted by Shreeni0403 View Post
                              While doing rewinding, i will go with stock electricals.
                              Now u dumped the bull

                              Comment


                              • Originally posted by Rossi_Fan View Post
                                Now u dumped the bull
                                Its Dad's bike. I can't ride it for longer period and without self start its a pain as I already ve a fractured leg.

                                EDIT - Lets stick to topic else moderators may kick us off
                                Last edited by Shreeni0403; 11-26-2009, 10:13 AM.

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