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  • Originally posted by sandeepcf View Post
    From my pictures,
    Output from Unicorn's RR which supplies power to Headlamps etc is "-ve" with respect to Ground. Can anyone explain this please.


    I got the wattage from Service/shop manual of Unicorn and Ambition. Yes shree is correct, lighting current is limited. Yes a HID can be fixed on Uni without any modifications. I am currently using 55/60w connected to battery and no issues at all. I wanted to rewind because I thought that it will increase the lighting current, but one statement from shree and baam..


    I completely agree. I should have started a new thread. But that can be explained in a good way like you did and not as if I intruded into private property.
    I didn't like the word Hijack, and also posting in CAPS is often referred to as shouting isn't it.

    Anyways I got answers to most of my queries.
    -> Current is divided in Unicorn's RR for lighting and charging, the lighting current being limited to a predetermined value.
    -> Lighting current in Unicorn is not AC.
    Thank you sajjit, abhijeet, esp shree.
    Finally please try to find an explanation to
    1. Reverse Polarity
    2. Weird voltages at different RPMs.
    Oh Cmon dude, there should not be any hurt feelings in that. Yes u r right,using caps is considered as shouting in forums which could've avoided, may be not intentional as we all here not to provoke anyone but to help, so Dr. too. I think u took it in the right spirit.

    Have u checked with MM the lighting power to confirm its DC?

    Weird readings can be MM is faulty/wrong selection of switch/low batt, even I too got crazy at times. Pls check that too.
    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


    • Have u checked with MM the lighting power to confirm its DC?
      That is what my picture indicates. A Multimeter can be faulty but a diode cannot be.
      My pictures also indicate the selection of modes correctly in MM

      Comment


      • @sandeepcf
        'By Phase if you mean AC and DC you are wrong. These are types of current and not phases. Phases exist in AC only. And RR is not taking both types of current from the coil. DC cannot be produced from a stator. Infact all the current produced from generators/alternators is AC. How did you calculate the 3.5A?'

        ans-
        my bad,i thought uni is having a dual phase coil,but itss actually having a single phase coil.
        how i calculated?just measured the ampere in ac channel after regulation.

        'Unicorn produces 125watts(with grounded coil) and Ambition produces 120watts(ground removed and connected to RR. This is its stock setup)'
        ans-
        wow!a coil with stock 125 watts.i will say one thing.if it is like anything near,why our master blaster shree wasnt able to use a 55/60 bulb+hid.it should be accomodated if its 125 watts correct?in reality ,its not even close.even apache claims that its having a very high output stator(more then 110 watt),but in reality it cant even pull a 55/60 halogen bulb in ac mode.these numbers are not always reallife true.

        'Cmon man Let me improve my electricals as well. As all your queries were answered and concluded there will be no harm if I continue this thread. If you still feel it is inappropriate let the Mods take care by moving it to appropriate section.'
        ans-sure go on,but i thought if you created a diff thread or posted in a thread that was in relation with unicorns ,every one can see it clearly.if you see over xbhp,there are many threads for pulsars dc conversion.shree took a great initiation by creating convert your bike to full dc which is loaded with honda specific infos,i already posted a thread how to convert apaches to all dc .its just that the infos will be mixed up here.this thread originally started as a pulsar ug2 specific upgrade,so i thought to lock this and keep it that way,no tough feelings.

        'I got the wattage from Service/shop manual of Unicorn and Ambition. Yes shree is correct, lighting current is limited. Yes a HID can be fixed on Uni without any modifications. I am currently using 55/60w connected to battery and no issues at all. I wanted to rewind because I thought that it will increase the lighting current, but one statement from shree and baam..
        ans-check the load with a 30 amp or less car ampere meter.i am sure its the battery which is draining under 3 k rpm,not enough juice from the coil to charge up in stock state.i am saying this because even when shree converted to full dc with floting the ground and stock rr he was having some stress when a 55/60 bulb around 3 k rpm.here are some pics....image courtesy ,the one and only SHREE bhai..


        no load-no charge/no discharge-

        no load-charging

        55w lowbeam-discharging@ 1k

        55 w lowbeam-@4 k rpm-no charge no discharge.

        60w highbeam@1k rpm-discharging.

        60w high [email protected] rpm-no charge no discharge.

        you see
        ,even after the brilliant mods shree had done there was some stress on the battery in 1k-3.9k rpm range.now in real life some more loads like occational use of horns,indicators ,breaks etc will be there. i remember shree changed his tail unit to leds and was very cautious about what to use and what to not.in that mode of caution he was using one hid +one 55/60 halo and others.now in long time use say 3 hours+ you should face low battery prob.the problem can arise in city very soon also as the rpm will be in danger zone.still if you are not facing any probs,i say,i m happy for you.

        'I completely agree. I should have started a new thread. But that can be explained in a good way like you did and not as if I intruded into private property.
        I didn't like the word Hijack, and also posting in CAPS is often referred to as shouting isn't it.
        '
        also to make a point.cool down.
        sigpic
        RIDE AND DRIVE SAFE AND PLEASE CHANGE THE PICTURE ON INDIAN ROADS.
        my thoughts,my area,my game....
        http://vmtm.blogspot.com/
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        Comment


        • Originally posted by sajjt View Post
          Wanna beat a 200W P220?
          Or the 232W coil of the ZMR

          Originally posted by sandeepcf View Post
          I got the wattage from Service/shop manual of Unicorn and Ambition. Yes shree is correct, lighting current is limited. Yes a HID can be fixed on Uni without any modifications. I am currently using 55/60w connected to battery and no issues at all. I wanted to rewind because I thought that it will increase the lighting current, but one statement from shree and baam..
          Hey !! I could only run 35w HID flawlessly but not a 55/60w Halogen for long duration. 55/60w I could run for a max of 4hours and battery was crying for mercy whereas a HID for 6+ hours was still strong enough to run self start easily.

          Comment


          • Originally posted by sandeepcf View Post
            There is a but. In the first picture the MM measured the raw voltage produced by the stator correctly at idle as well as at higher RPMS and at full throttle the measurement was 79volts. so frequency of the stator voltage can be measured by my MM before regulation/rectification.
            It is not accurate but not too wrong.
            Also when I connected a bulb and measured the current the result was 3.25Amperes. so current measurement was correct but not the voltage reading.
            Why is the polarity reversed? Is it also error from MM? I'll confirm the polarity tomorrow.
            As for the third pic, the bulb gets AC voltage, so DC readings will be obviously wrong. Now, the 4th pic, should show about 12V with the bulb OFF. Dont know why it shows so less.
            Your biking tells a lot about the person you are!

            Comment


            • wow!a coil with stock 125 watts.i will say one thing.if it is like anything near,why our master blaster shree wasnt able to use a 55/60 bulb+hid.it should be accomodated if its 125 watts correct?in reality ,its not even close.even apache claims that its having a very high output stator(more then 110 watt),but in reality it cant even pull a 55/60 halogen bulb in ac mode.these numbers are not always reallife true.
              Hey I tested the current like this.
              -connected 2*55w bulbs in parallel. so total of 110watts can be measured using this load.
              -a) First measured the voltage across the battery with engine OFF.--12.65v.
              -b) Now connected the load and measured Amperage --5.6
              so Total power that can be supplied from 7AH battery-- 12.65*5.6=70watts
              -c) Disconnected the Battery, gave full throttle measured the voltage - 14.1V across battery charging wires RED and BLACK
              -d) Connected the load to the RED and BLACK and measured the Amperage at full throttle --5.1
              so Total power that can be supplied to the battery from RR is 14.1*5.1=72watts
              By looking at the much deviation from 125w as claimed by manual to 72w I was confused. Then
              -e) Replaced the 55w bulb which is connected to the headlight with 35w bulb and changed the lighting connections to stock ie Headlamp+Tail lamp driven from RR.
              -f) Again gave full throttle and measured the Amperage at RED and BLACK--5.08 which is almost equal to previously recorded 5.1A.
              In this condition the HEADLAMP, TAILLAMP were also illuminated to the full. so the Headlamp+Taillamp consumed 45w. Couldn't measure with MMeter because the wires of probes have become very hot.

              Summing Up all the Powers: From Charging wires 72watts + From Lighting wires 45watts Total Power = 117watts.
              The remaining 8~10watts might be lost when the Regulation/Rectification is done in the form of heat etc.

              Comment


              • @abhjeet.

                ME:
                Lighting O/P from RR has a negative polarity and the voltages recorded are weird.
                YOU:
                That is a faulty recording from MultiMeter.
                ME:
                The MM might have recorded the voltages incorrectly due to frequency issues but measured the Amperage correctly. For a 35w bulb I got 2.6A.
                YOU:
                That is AC.
                ME:
                If that is AC why would it show -ve readings. will check for polarity tomorrow.
                ME:
                Checked the Polarity by using a diode and posted the pics. Circuit completed only in one case(bulb glow). Open ckt when the diode is reversed. This should not happen if the current is AC right. Also the polarity is negative wrt the ground. Cannot be made void because I didn't use a MM.

                Comment


                • Originally posted by sandeepcf View Post
                  @abhjeet.

                  ME:
                  Lighting O/P from RR has a negative polarity and the voltages recorded are weird.
                  YOU:
                  That is a faulty recording from MultiMeter.
                  This was with respect to the 1st reading. (Did not look at the rest of the pics at that time.) Sorry if I was not clear.
                  ME:
                  The MM might have recorded the voltages incorrectly due to frequency issues but measured the Amperage correctly. For a 35w bulb I got 2.6A.
                  YOU:
                  That is AC.
                  And I dont know how MM calculates current internally.
                  ME:
                  If that is AC why would it show -ve readings. will check for polarity tomorrow.
                  Coz you measured DC voltage for an AC signal (3rd pic). I have seen the same before too. It is a MM specific characteristic. What you got are bogus readings. Hope I am clear.

                  The 4th pic, measuring AC voltage should have shown some 12V though. I am confused why it didn't.

                  ME:
                  Checked the Polarity by using a diode and posted the pics. Circuit completed only in one case(bulb glow). Open ckt when the diode is reversed. This should not happen if the current is AC right. Also the polarity is negative wrt the ground. Cannot be made void because I didn't use a MM.
                  Let me verify, your bike is STOCK Unicorn right? If so how did the diode test fail? I have done the same for the tail light (for a different purpose though) and as expected it shows pulsating DC for both directions on the diode.
                  Hey I tested the current like this.
                  -connected 2*55w bulbs in parallel. so total of 110watts can be measured using this load.
                  -a) First measured the voltage across the battery with engine OFF.--12.65v.
                  -b) Now connected the load and measured Amperage --5.6
                  Voltage with this load connected? This will not be the same 12.65V at no load condition. The final wattage will be even lower than 70W, I guess.
                  so Total power that can be supplied from 7AH battery-- 12.65*5.6=70watts
                  -c) Disconnected the Battery, gave full throttle measured the voltage - 14.1V across battery charging wires RED and BLACK
                  -d) Connected the load to the RED and BLACK and measured the Amperage at full throttle --5.1
                  You need the ON load voltage here too.
                  so Total power that can be supplied to the battery from RR is 14.1*5.1=72watts
                  By looking at the much deviation from 125w as claimed by manual to 72w I was confused. Then
                  -e) Replaced the 55w bulb which is connected to the headlight with 35w bulb and changed the lighting connections to stock ie Headlamp+Tail lamp driven from RR.
                  -f) Again gave full throttle and measured the Amperage at RED and BLACK--5.08 which is almost equal to previously recorded 5.1A.
                  What was the battery load at this point? Same 2 55W bulbs?
                  In this condition the HEADLAMP, TAILLAMP were also illuminated to the full. so the Headlamp+Taillamp consumed 45w. Couldn't measure with MMeter because the wires of probes have become very hot.

                  Summing Up all the Powers: From Charging wires 72watts + From Lighting wires 45watts Total Power = 117watts.
                  The remaining 8~10watts might be lost when the Regulation/Rectification is done in the form of heat etc.
                  Interesting experiments those!
                  Your biking tells a lot about the person you are!

                  Comment


                  • would a projector fog lamp work good on a bike..???i am getting a projector with angel eyes and itz a h3 fog lamp type projector??will it give a good glare?
                    sigpic

                    Comment


                    • see the boldy.....

                      Originally posted by sandeepcf View Post
                      Hey I tested the current like this.
                      -connected 2*55w bulbs in parallel. so total of 110watts can be measured using this load.
                      @12 volts.
                      -a) First measured the voltage across the battery with engine OFF.--12.65v.
                      this is off load voltage,12.6 means the battery fully charged.
                      -b) Now connected the load and measured Amperage --5.6
                      so Total power that can be supplied from 7AH battery-- 12.65*5.6=70watts
                      hoho hold on.you need another multimeter to mesure the volt of battery in this time,realtime.if you do,you will see the battery voltage is low,also if you take the same ampere reading which is 5.6 ,with a help of a big battery you will see the amp rating is something around 9 amps or more as the big battery will maintain a stedy voltage then a puny 7 amp battery.in reality ,by this test the 2 bulbs which you connected are not glowing in there full intensity.
                      -c) Disconnected the Battery, gave full throttle measured the voltage - 14.1V across battery charging wires RED and BLACK
                      i guess it was no load this time.its perfectly ok.
                      -d) Connected the load to the RED and BLACK and measured the Amperage at full throttle --5.1
                      so Total power that can be supplied to the battery from RR is 14.1*5.1=72watts
                      again was the battery was connected this time or not?i guess not.again if you tested the voltage with the help of another meter you can see the drop of voltage well below 12.again the bulbs are not glowing at there full intensity as there is lack of voltage.if the voltage was stable with that load the amp rating should be around 9 amps.
                      By looking at the much deviation from 125w as claimed by manual to 72w I was confused. Then
                      -e) Replaced the 55w bulb which is connected to the headlight with 35w bulb and changed the lighting connections to stock ie Headlamp+Tail lamp driven from RR.
                      -f) Again gave full throttle and measured the Amperage at RED and BLACK--5.08 which is almost equal to previously recorded 5.1A.
                      you shorted the +ve and negetive terminal when you mesured the amps?.
                      In this condition the HEADLAMP, TAILLAMP were also illuminated to the full. so the Headlamp+Taillamp consumed 45w.
                      true.its driving from ac regulated part from rr.
                      Couldn't measure with MMeter because the wires of probes have become very hot.

                      Summing Up all the Powers: From Charging wires 72watts + From Lighting wires 45watts Total Power = 117watts.
                      The remaining 8~10watts might be lost when the Regulation/Rectification is done in the form of heat etc.
                      you are corret about the ac part 45 watts.as i already told its limited around 3.5 amps.the voltage varies from 12 to 14 volts ,as the ac parts glow in full intensity.

                      for the dc part its not 72 watts,not even close,you are wrong here.
                      why?ok.as you are doing all kind of experiments,just do one more.go back to stock condition.now add 2 of your 55 watt halogen bulbs in parallel.now switch everything on.just ride on........................
                      first the battery will die-if the load is 72 watts the battery should not die correct?of disconnect all horn indicator tail break lamp,still the battery wil die.

                      or simply add a car ammpere meter and connect in series.you will see the its discharging.

                      a voltage of 12 .5 volts or less and declining at a steady rate going down and down is a dying battery.
                      get back with the results.

                      sigpic
                      RIDE AND DRIVE SAFE AND PLEASE CHANGE THE PICTURE ON INDIAN ROADS.
                      my thoughts,my area,my game....
                      http://vmtm.blogspot.com/
                      IF YOU LOVE MAINTAINING YOUR RIDE..http://nexgenbikes.com/site/

                      Comment


                      • Originally posted by drvmtm View Post
                        you are corret about the ac part 45 watts.as i already told its limited around 3.5 amps.the voltage varies from 12 to 14 volts ,as the ac parts glow in full intensity.

                        for the dc part its not 72 watts,not even close,you are wrong here.
                        why?ok.as you are doing all kind of experiments,just do one more.go back to stock condition.now add 2 of your 55 watt halogen bulbs in parallel.now switch everything on.just ride on........................
                        first the battery will die-if the load is 72 watts the battery should not die correct?of disconnect all horn indicator tail break lamp,still the battery wil die.

                        or simply add a car ammpere meter and connect in series.you will see the its discharging.

                        a voltage of 12 .5 volts or less and declining at a steady rate going down and down is a dying battery.
                        get back with the results.

                        Wow wow... well said dude. Nothing more to add except the wire shorting as u said, must be a spell mistake I hope else he wont get the reading of 5.08A.

                        Sandeep, its better to have an Ampere meter to measure the amps properly and u can continuously monitor the current at any point of time without heating up the testing prob wires. I've changed the probe wire to a bit more thicker one but still its heating if I measure beyond 6A
                        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


                        • ^ one thing I learnt from measuring current above 5 amps is to use short probes. I made one from 2 crocodile clips, and 2 banana jacks (these are a dirrect fit to the DMM). Just solder the end of banana jack to the crocodile clip with a flat metal strip. I used 2 small bits of welding rod. the guy who soldered the jack used to weld as well, so got the whole thing done for ten bucks

                          I mostly use my analog for measuring current and voltage. It costs 100 bucks!
                          Sit Down, Shut Up and Hang on ....

                          FB :
                          Ragavan Venkatakrishnan

                          Comment


                          • Let me verify, your bike is STOCK Unicorn right?
                            Yes it is STOCK. Previously in the HID thread or Let there be Light thread(sorry if the thread name is incorrect) I tried to follow your Idea - disconnect the wire which supplies AC to headlamp and use bridge rectifier & redirect to battery; that time also the diode test failed. And I PM'ed the same about reverse polarity to Shree and he was not sure. I will triple check my results for the polarity and post the images tomorrow in a clearly understandable way.

                            Voltage with this load connected? This will not be the same 12.65V at no load condition. The final wattage will be even lower than 70W, I guess.
                            Oh my mad, how could I measure voltage at noload condition, forgetting the basics. Infact there were two mistakes in the experiment. One - the above; Two - I used thin wires for the connections. Also the probes of the MM are also so thin that they cannot let 100 watts through them. So Today I used solid household wires in place of probes and recorded the values, Also I measured the voltage when the load is ON.

                            Todays slightly refined experiment.
                            -Disconnected the battery.
                            -Connected the load of 2*55w across battery charging wires RED & BLACK.
                            -Connected the Multimeter across the LOAD, MM set to read Voltage.
                            -Started the bike and gave full throttle. Bulbs Illuminated.
                            -Recorded voltage across the LOAD/bulbs ----->> 10.24V
                            -Turned the engine off to break the circuit and set the MM in series to record the Amperes.
                            -Again Started the bike and gave full throttle. Bulbs Illuminated.
                            -Recorded the Amperes ------------->> 7.49

                            So there are no mistakes right? Now the POWER(watts) = Voltage(10.24) * Current(7.49)
                            ====76.69 which is nearly 77watts.
                            Today I didn't connect the 35+10w load because yesterday it didn't effect the result at RED & BLACK charging ends.
                            so estimated total power=77+45=122w

                            for the dc part its not 72 watts,not even close,you are wrong here.
                            If you still don't think this is valid I will take a video and post it here.

                            go back to stock condition.now add 2 of your 55 watt halogen bulbs in parallel.now switch everything on.just ride on........................
                            Doctor you didn't understand the situation of the patient here. I mentioned FULL THROTTLE - to measure the max wattage. If I ride with 2*55 in the city then my battery would be discharged when I make a turn to the next galli.

                            Nothing more to add except the wire shorting as u said, must be a spell mistake I hope else he wont get the reading of 5.08A.
                            Sandeep, its better to have an Ampere meter to measure the amps properly and u can continuously monitor the current at any point of time without heating up the testing prob wires. I've changed the probe wire to a bit more thicker one but still its heating if I measure beyond 6A
                            Photos speak more than words.. hahaha just kidding. Yes in the place of thin MM probes I used normal household wires which can carry 1100V and 600watts. Finolex wires-))

                            Guys If you think there is any mistake in my way of measuring the values let me know. As far as I am concerned the connections were correct and no shorting of wires happened. About the separate Ammeter/Car AMP meter - I don't want to spend on those things. A separate Ammeter is not required because I don't want to measure current all the time and MM is measuring the current correctly because I tested it today using the same 110watts of load on a battery and I got 11.95V and 9.12A which is nearly 109watts.

                            Comment


                            • read the boldy

                              Originally posted by sandeepcf View Post
                              Todays slightly refined experiment.
                              -Disconnected the battery.
                              -Connected the load of 2*55w across battery charging wires RED & BLACK.
                              -Connected the Multimeter across the LOAD, MM set to read Voltage.
                              -Started the bike and gave full throttle. Bulbs Illuminated.
                              -Recorded voltage across the LOAD/bulbs ----->> 10.24V
                              -Turned the engine off to break the circuit and set the MM in series to record the Amperes.
                              -Again Started the bike and gave full throttle. Bulbs Illuminated.
                              -Recorded the Amperes ------------->> 7.49

                              So there are no mistakes right? Now the POWER(watts) = Voltage(10.24) * Current(7.49)
                              ====76.69 which is nearly 77watts.
                              Today I didn't connect the 35+10w load because yesterday it didn't effect the result at RED & BLACK charging ends.
                              so estimated total power=77+45=122w


                              If you still don't think this is valid I will take a video and post it here.
                              ,no mate,i believe you.its just that you are forgetting one thing.the system is a 12 volt system,and under load it should maintain at least 12.5 volts.when you are measuring the ampere ,connect a second multimeter to measure the voltage realtime.now start with a 55 watt load,and keep increasing the load.once the voltage reading is less then 12.5 volts,thats your break in voltage.YOU NEED TO HAVE A 12.5 VOLT STABLE DC FOR ALL PRACTICAL USE.if you do this you will be measuring the actual usable output of the coil,and i bet its less then 70 watts.if its was more then 70 watts your voltage would have been stayed at around 12.4-12.5 under load.

                              Doctor you didn't understand the situation of the patient here. I mentioned FULL THROTTLE - to measure the max wattage. If I ride with 2*55 in the city then my battery would be discharged when I make a turn to the next galli.
                              ,sorry if i misunderstood you.

                              Photos speak more than words.. hahaha just kidding. Yes in the place of thin MM probes I used normal household wires which can carry 1100V and 600watts. Finolex wires-))
                              good idea mate,next time when i will test i will also do so.
                              Guys If you think there is any mistake in my way of measuring the values let me know. As far as I am concerned the connections were correct and no shorting of wires happened. About the separate Ammeter/Car AMP meter - I don't want to spend on those things. A separate Ammeter is not required because I don't want to measure current all the time and MM is measuring the current correctly because I tested it today using the same 110watts of load on a battery and I got 11.95V and 9.12A which is nearly 109watts.
                              but mate,a voltage of 11.95 is not acceptable.if you use it on bike s charging also you will see its declining at a steady rate,simply because the input charging is less then output.if you use a car amp you can understand the break in load easily.please refer to previous page wher i posted the shrees amp meter pics.you will undestand.
                              hope this helps.
                              sigpic
                              RIDE AND DRIVE SAFE AND PLEASE CHANGE THE PICTURE ON INDIAN ROADS.
                              my thoughts,my area,my game....
                              http://vmtm.blogspot.com/
                              IF YOU LOVE MAINTAINING YOUR RIDE..http://nexgenbikes.com/site/

                              Comment


                              • ^^ Agree with what Doc says. You need 12V atleast.
                                Your biking tells a lot about the person you are!

                                Comment

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