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Recent content by ka2vey

  1. ka2vey

    single phase xfmr primary to secondary phase shift

    wrong100, What you are missing is that phase shift and accuracy are two different animals. The angular accuracy of these devices is on the order of about 10 arc-minutes. They are excited with ac at about 8 kHz (more or less) and the output voltage lags the input voltage by about 16...
  2. ka2vey

    single phase xfmr primary to secondary phase shift

    Greetings all, An update of sorts. I have successfully modeled the impedances as functions of turns and wire gauge, and have been able to successfully predict (within about 1 degree) output phase and voltage. Although the suggestion of adding a capacitively reactive load was a good one...
  3. ka2vey

    single phase xfmr primary to secondary phase shift

    It is essentially a rotary position indicator. The primary of the first xfmr is mounted in a stator and the secondary is mounted on a rotor that is physically connected to rotating equipment. The primary of the second xfmr is mounted on the same rotor as the secondary of the first xfmr. The...
  4. ka2vey

    single phase xfmr primary to secondary phase shift

    Gentlemen, My current product has a total phase shift of -18 degrees, and I am trying to move this to -3 degrees. These are not power transformers, but are used as feedback instrumentation (I am working on resolvers). The primary and secondary of the first transformer are concentric...
  5. ka2vey

    single phase xfmr primary to secondary phase shift

    Folks, Thanks for the input. The difficulty I am having is this. I have two single phase transformers, and the secondary of the first is feeding the primary of the second. i modeled each xfmr as a T network with great success, but running the two T's together is giving me fits. I want...
  6. ka2vey

    single phase xfmr primary to secondary phase shift

    Greetings, I am trying to analytically arrive at an expression for the phase difference between the primary and secondary voltage in a single phase transformer, in terms of reactance or turns ratio. Thanks in advance. Scott

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