PRECISION VECTOR-DIFFERENCE TRANSFORMER WITH HIGH COMMON-MODE REJECTION |
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| 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:
- IMEKO-TC4-2001-097.pdf
- DOI:
- -
- 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