Skip to main content

Search Proceedings

PRECISION VECTOR-DIFFERENCE TRANSFORMER WITH HIGH COMMON-MODE REJECTION

F. Cabiati, U. Pogliano, G. C. Bosco
  • Abstract:
    The problem of obtaining the difference of two AC voltages represented by vectors with arbitrary amplitude and phase at accuracy levels unattainable with electronic amplifiers is addressed. A solution consisting in a precision complex transformer is presented, together with a mathematical model and some preliminary studies of more general interest. A shielded prototype has performed accuracy levels below 1 × 10-6 from 30 Hz to 12 kHz and a common-mode rejection ratio exceeding 140 dB from 800 Hz to 40 KHz.
  • Keywords:
    AC difference, common-mode rejection, precision transformer
  • Download:
  • DOI:
    _unreg_tc4-2001.097

Event details:

  • IMEKO TC:
    TC4
  • Event name:
    TC4 Symposium 2001
  • Title:

    11th IMEKO TC4 Symposium on Trends in Electrical Measurements and Instrumentation (together with 6th IMEKO TC4 Workshop on ADC Modelling and Testing)

  • Place:
    Lisbon, PORTUGAL
  • Time:
    13 September 2001 - 14 September 2001