Magnetic bridge-type current sensor and magnetic bridge-type current detection methods, as well as, magnetic bridge to be used in the sensor and detection method

摘要

The object of the present invention that the structure and enables the dynamic range of 80dB and sensitivity of 100μA area at least to provide a concise current detection method and the current sensor, the present invention, both ends, the configuration of the current sensor for solving this problem and the middle leg magnetic circuit 1 of one with the outer leg magnetic circuit 2a two each connected to the one end and the other end, and 2b, are arranged in the outer leg magnetic circuit 2a one of the middle leg magnetic circuit 1 excitation means 3b, which is arranged in the outer leg magnetic circuits 2b and exciting means 3a is, the magnetic flux detection means 4 are arranged in the middle leg magnetic circuit 1, each driving the exciting means (3a, 3b) It is obtained by the fact that and a detection circuit 8 for outputting an electric signal in conjunction with excitation drive means 7 to, and the detected magnetic flux is detected in the magnetic flux detection means 4 is connected to the magnetic flux detection means 4.