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Window Motor Replication

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  • #76
    man what a difference 5 or 10 grams makes

    I went to a wheel balancing place today and got some lead weights they were throwing out. glued them on and now no viabrations @ high speed.
    "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

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    • #77
      Re: speed test

      Hi Ren,

      It's looking good! And yes, balance is definitiely the most important factor in a rotational device. One can spend a lot of money on shafting and bearings, but it is all for naught if balance is not obtained. If anyone doesn't understand that, just think for a moment about a clothes washing machine - something we can all relate to. If the clothes are not distributed evenly during the spin cycle, the machine will spin slowly with much vibration and noise. By balancing the load properly, you obtain the fastest rotational spin, least amount of noise, and greatest possible reduction in vibration. It all adds up to improved performance and extended machine life.

      Looking forward to your next video, Ren.

      Best regards,

      Rick
      "Seek wisdom by keeping an open mind to alternative realities, questioning authority, and searching for truth. Only then, when you see or hear something that has 'the ring of truth' to it, will it be as if a veil has been lifted, and suddenly you will begin to hear and see far more clearly than ever before." - Rickoff

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      • #78
        Thanks Rick,

        Over 1400rpm today. Seems pretty solid. Dont think anything is coming off. Fibreglass wrapped around the centre and ends and Heaps of epoxy and gaffa tape. If I ever build another one I am just gonna embedd the things in resin to start with.
        "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

        Comment

        • #79
          Suggestion

          Hi Ren,

          Have you given any more consideration to the induction motor/generator idea? Here's a suggestion for you:

          As I pointed out in an earlier post, you would need to drive the induction motor to around 1855 rpm to derive full benefit from it as a generator. That might prove difficult or unsafe with your current setup in a direct drive mode, but I think you could easily achieve this with 1:2 drive ratio, operating the window motor at something between 925 and 930 rpm's. I imagine that you do have enough torque to handle the load at that speed. You might try it with a drive belt and pulleys first, and switch to a magnetic gear later. If you use a clutching pulley on the WM drive shaft, that would allow the WM to build speed before the drive belt engages.

          Best wishes,

          Rick
          "Seek wisdom by keeping an open mind to alternative realities, questioning authority, and searching for truth. Only then, when you see or hear something that has 'the ring of truth' to it, will it be as if a veil has been lifted, and suddenly you will begin to hear and see far more clearly than ever before." - Rickoff

          Comment

          • #80
            induction motor/generator idea

            You know would be 100 efficient, if you could manage to work out the DRAG equation.

            Ren having a Permanent magnet rotor, working like an induction motor, and using a Frequency drive to get it up to speed, should be almost 100% conversion.(no slip) Off topic but had to put it in there

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            • #81
              Great ideas guys.

              I have though a little more on the induction motor idea Rickoff. As you say, getting it up to speed is going to be the biggest hurdle. I just cant seem to go past the axial flux generator though, No iron cores so the only drag is going to be coil saturation, depending on current flow. And it makes its best power @ low rpm, like 400-500. It is fairly close to some of the Gfield designs too, so its on the right track. I can gear it the other way then, have the window motor producing high rpm with a small pulley and the AF generator driven at lower speeds. I hit 1400rpm the other day @ 48v 500ma so the pulley ratio could be 3 to 1.

              Ive been tinkering with the oscillating light at the moment, but the generator is still in the works. I just dont have the $$$$ otherwise Id get stuck into it today!

              Ash I have thought of using a monopole/superpole design on the back end that could be pulsed until it gets up to speed. So many options, so little moolah!

              Ren
              "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

              Comment

              • #82
                New rotor being built as of yesterday. Rotor is polyethylene machined block, and magnets will be recessed in and bound by a 2mm layer of polyethylene strip/retainer. Been along time in the redesigning stage, but its finally starting to come back together.

                Pics coming soon.
                "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

                Comment

                • #83
                  Originally posted by ren View Post
                  New rotor being built as of yesterday. Rotor is polyethylene machined block, and magnets will be recessed in and bound by a 2mm layer of polyethylene strip/retainer. Been along time in the redesigning stage, but its finally starting to come back together.

                  Pics coming soon.

                  Hi Ren,


                  Wow,Another window motor build.Will it be as big as the last one?.Anyways,Good luck with the new build and I for one cant wait to see it.


                  -Gary

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                  • #84
                    Its a redesign of the last one. Bent the shaft so I dismantled it for re-construction. Been taking my time, trying to make sure it wont happen again.

                    Saved everything from the last build except the acrylic. So not a total loss really
                    "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

                    Comment

                    • #85
                      Rotor @ machine shop.
                      Last edited by ren; 08-18-2009, 01:35 AM.
                      "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

                      Comment

                      • #86
                        This looks scary
                        Nice idea about holding the magnets in place
                        Great job!
                        Thanks.
                        It's better to wear off by working than to rust by doing nothing.

                        Comment

                        • #87
                          Thanks Jet, I call him Lord Vader, cause they ran out of white.

                          Strip is plastic welded in place. Still needs plates welded to the sides and a few finishing touches.
                          "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

                          Comment

                          • #88
                            Ren,

                            Originally posted by ren View Post
                            Thanks Jet, I call him Lord Vader, cause they ran out of white.

                            Strip is plastic welded in place. Still needs plates welded to the sides and a few finishing touches.
                            I am very curious what you will use for bearings. Should be easier to deal with a smaller wheel than you were working with before. But as you know balance is sooooooo important.

                            I am wondering will you go up to 24V to run this baby?

                            I just got done watching a video about Floyd Sweet, made me wonder if Bedini tunes his magnets to get the most out of them...... Was thinking about going to a junk yard and seeing if they would switch on their huge electro magnets to charge my ceramics to see if it would make a difference......

                            Hope the best with you, even though you are using the dark side of the force weapons
                            See my experiments here...
                            http://www.youtube.com/marthale7

                            You do not have to prove something for it to be true. However, you do have to prove something for others to believe it true.

                            Comment

                            • #89
                              Hey Mart.

                              I am using a standard wheel bearing, similar to one that may be found on a trailer or car wheel. It is 35mm internal diameter and I have removed the seals and grease. Looks somewhat like this.

                              http://www.drives.co.uk/images/news/SKF%20energy-efficient%20bearing.jpg


                              Lubricate with sewing machine oil, or Excel Plus (typo? Rick F uses it and includes it in his kits). My bearings went from a 1/2 second free wheel to over 10 seconds with this, just holding it in my hands.

                              There is nothing small about this rotor Mart . It may be half the length of my previous one, but its double the diameter, easily. Not to mentioned machined, balancing shouldnt be much of a problem with the right tools used in the first place. And yes, 24v will be an option here.


                              Regards
                              Last edited by ren; 03-23-2009, 08:35 AM.
                              "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

                              Comment

                              • #90
                                Finished rotor
                                Last edited by ren; 12-03-2009, 10:42 PM.
                                "Once you've come to the conclusion that what what you know already is all you need to know, then you have a degree in disinterest." - John Dobson

                                Comment

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