Clamp type direct current sensor
A DC current and sensor technology, applied in the direction of measuring current/voltage, instruments, measuring electrical variables, etc., can solve the problems of increased linearity error and low measurement accuracy, and achieve the elimination of nonlinear errors, large-scale DC current non-contact online measured effect
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[0013] As shown in the figure, the clamp-type DC current sensor of the present invention includes a clamp-type magnetic core, and an excitation winding W1, a measurement winding W2 and a feedback winding W4 are respectively wound on the clamp-type magnetic core; the excitation winding W1 is electrically connected to the output end of the excitation circuit composed of the triangular wave generating circuit and the power amplification driving circuit A1; the measurement winding W2 is electrically connected to the input end of the detection circuit; the feedback winding W4 is electrically connected to the output end of the detection circuit; The detection circuit is composed of a signal conditioning circuit, a single-chip microcomputer 8051, a D / A conversion circuit, and a power amplifier driving circuit A2; the feedback winding W4 is electrically connected to the input terminal of the current sampling circuit. The output end of the signal conditioning circuit is electrically con...
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