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Thread: ZFM Advanced Explorations

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    Senior Member Yaro1776's Avatar
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    Aug 2012
    Heart of Vermont

    ZFM Advanced Explorations

    Hello to All,

    The ZFM, as conceived by the late John Bedini and subsequently built by Peter Lindemann, is a very intriguing motor as demonstrated in the ZFM Replication thread. That thread delineates the workings of this motor and provides the basic conceptual and design information necessary for replication. The ZFM Conference Presentation video is also helpful in fleshing out certain details.

    The key elements of the ZFM as executed by Lindemann and demonstrated at the 2016 and 2017 Conferences are twin opposing coils, each of about 90 degree arc with an internal four pole iron rotor with four Neo magnets in a NSNS configuration. The motor is energized and controlled by the Bedini Cole Bipolar switch via a timing rotor and reed switches.

    There are a number of possible design arrangements, however this thread will use the PL(Lindemann)ZFM configuration for the explorations since one replicated ZFM unit is at hand. This motor, the YZFM, has quite a few hours of operation under its belt and is easily modified which suits the purpose of this thread.

    The explorations will use the same timing parameters for the YZFM that were demonstrated at the last conference. The parameters are as follows: 1) Firing Angle (FA) of 60-65 degrees (Degrees of Arc that coil is energized), 2) Advance (Adv) of ~45 degrees (Degrees of Arc where firing is initiated as measured from the center point between the coils) and 3) an operating voltage of 36v DC. This is a less aggressive tuning for this machine, but it still demonstrates very good performance and is a stable configuration for the YZFM and the purposes of this thread.

    The first step taken was to modify the motor by removing all the stainless steel fasteners (Cap screws) and retaining straps, and replacing with nylon bolts and using EPDM bungee cords for motor positioning and retention. The pillow block bearings were remounted further away from the motor body as suggested by others. The major modification involved replacing the earlier 3/4"Dx3/8"T Neo's with 1"Dx3/8"T Neo's. The timing rotor Neo's were reconfigured to a NS arrangement from the initial NN arrangement. These several simple modifications stabilized the performance of the motor and produced a consistent behavior that yields well over 10,000 RPM at 0.62Amp and 36v.

    YZFM Mod 11.11.17.JPG

    The next post will explore varying the axial position of the Rotor Neo's with respect to the centerline of the coils. As always, questions relevant to the thread will be answered as time permits.

    Last edited by Yaro1776; 11-11-2017 at 08:02 AM. Reason: Insert Modified YZFM image


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