5. Open-loop current transducer associated with a transformer
Principle
In the case of the flux-compensated transducer, we have noted the limitations induced by the need to control a significant secondary current over a wide frequency range. To overcome this limitation, it is possible to combine the principles of open-loop measurement and the current transformer. In this way, the output voltage of the Hall generator is added to the output voltage of the transformer. Figure 13 shows the schematic diagram and its equivalent model. The resistor R 3 placed at the end of the connecting cable adapts the cable impedance at high frequencies. Indeed, at 100 MHz a 1 m coaxial cable corresponds to half a wavelength (considering...
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Open-loop current transducer associated with a transformer
Rogowski or non-magnetic sensor
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References
- (1) - - Les capteurs de courant de marque LEM : http://www.lem.com/
- (2) - - Capteur d'induction et de courant de marque Honeywell :
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