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Speed controller for golf trolley

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    Speed controller for golf trolley

    Hi guys,
    Strange one here. I have a few speed controllers off some electric golf trolleys. They are not working and usually give trouble. New ones are about 80 euro so I said I might give it a go to see about fixing em. I will upload photos later.
    Any help will be much appreciated

    #2
    Re: Speed controller for golf trolley

    sounds fun.
    what are the motors like? single phase brushed, or 3/5phase brushless??

    Comment


      #3
      Re: Speed controller for golf trolley

      Hi,
      They are 12v. These are walk behind trolleys.

      Comment


        #4
        Re: Speed controller for golf trolley

        damn, i though you meant little electric cars.
        so it's a motorised bag?
        golfers are lazy bastards!

        Comment


          #5
          Re: Speed controller for golf trolley

          They look like this.
          Attached Files

          Comment


            #6
            Re: Speed controller for golf trolley

            Originally posted by stj View Post
            damn, i though you meant little electric cars.
            so it's a motorised bag?
            golfers are lazy bastards!
            HAHAHAHA!!!! motorized bag!!! made my day!

            Comment


              #7
              Re: Speed controller for golf trolley

              but it is - that's the joke!

              Comment


                #8
                Re: Speed controller for golf trolley

                Brilliant. That's the ones above alright. Sorry to burst your bubble stj

                Comment


                  #9
                  Re: Speed controller for golf trolley

                  btw, it looks like shit - i'll explain.

                  the center wheel is too narrow to put any weight on it on grass - it will sink down.
                  the outer wheels are better, but no real tread on them - ok if your pushing but not if they are driven!

                  Comment


                    #10
                    Re: Speed controller for golf trolley

                    They work quite well actually. If the ground is very muddy you can get spiked wheels

                    Comment


                      #11
                      Re: Speed controller for golf trolley

                      hardcore off-road version with diff locker... lol

                      Comment


                        #12
                        Re: Speed controller for golf trolley

                        https://circuitglobe.com/resistance-box.html

                        Comment


                          #13
                          Re: Speed controller for golf trolley

                          Can you post a picture of both sides of the controller board and the motor
                          9 PC LCD Monitor
                          6 LCD Flat Screen TV
                          30 Desk Top Switching Power Supply
                          10 Battery Charger Switching Power Supply for Power Tool
                          6 18v Lithium Battery Power Boards for Tool Battery Packs
                          1 XBox 360 Switching Power Supply and M Board
                          25 Servo Drives 220/460 3 Phase
                          6 De-soldering Station Switching Power Supply 1 Power Supply
                          1 Dell Mother Board
                          15 Computer Power Supply
                          1 HP Printer Supply & Control Board * lighting finished it *


                          These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                          1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                          2 Hem Saw Computer Stack Board

                          All of these had CAPs POOF
                          All of the mosfet that are taken out by bad caps

                          Comment


                            #14
                            Re: Speed controller for golf trolley

                            Pics of one of em attached
                            Attached Files

                            Comment


                              #15
                              Re: Speed controller for golf trolley

                              start by removing all the flux & shit from water ingress,
                              then remove and check the relay.
                              btw, the red & blue are touching - it should have used a connector there - cheap shit.

                              Comment


                                #16
                                Re: Speed controller for golf trolley

                                Here is another one, which is in better condition.
                                Attached Files

                                Comment


                                  #17
                                  Re: Speed controller for golf trolley

                                  I'd check the two power mosfet's for shorts. The third TO-220 part seems to be a dual diode. Look for 5V at regulator U3 which powers U4 MCU, to see if the logic/MCU has power. I think the relay is part of a half H-bridge for direction?

                                  Comment


                                    #18
                                    Re: Speed controller for golf trolley

                                    i still suspect the relay - when mosfets short they usually explode.

                                    Comment


                                      #19
                                      Re: Speed controller for golf trolley

                                      Tested mosfets and I think they are ok but I really need a new multimeter.......

                                      Comment


                                        #20
                                        Re: Speed controller for golf trolley

                                        Will test the relay tonight .....runs to Google how to test a relay

                                        Comment

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