Current Sensor

Details Current Sensor Current Sensor

2008-07-15

2008-07-15

Nguyen, Ha (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

Reexamination Certificate

active

07400131

ABSTRACT:
A current sensor comprises a magnetic module, whereby a primary conductor, a compensating winding and a magnetic field probe are magnetically coupled to each other. The primary conductor carries a current to be measured, with a driving circuit, for producing a triangular current, injected into the compensating winding. An evaluation circuit switches the output signal thereof from a first to a second output level and vice versa by a zero crossing of a signal, provided by the magnetic field probe, whereby the output signal is pulse-width modulated, depending on the intensity of the current to be measured.

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Ogasawara et al., “A Digital Current Sensor for PWM Inverters”, IEEE, pp. 949-955.
Sonoda et al., “An ac and dc Current Sensor of High Accuracy”, IEEE Transactions on Industry Applications, vol. 28, No. 5, pp. 1087-1094.

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