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Zero flux control type current sensor and zero adjustment method for zero flux control type current sensor
Zero flux control type current sensor and zero adjustment method for zero flux control type current sensor
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机译：零磁通控制型电流传感器及零磁通控制型电流传感器的调零方法
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摘要
PROBLEM TO BE SOLVED: To reduce magnetization of a magnetic core when a magnetoelectric transducer is switched to an ON state.SOLUTION: A processing section performs: stop-time zero adjustment processing (53, 54) of identifying a stop-time zero adjustment voltage data value Dad1 indicating a stop-time zero adjustment voltage value Vad1 of a voltage for adjustment Vad such that a detection voltage V2 is zero when a Hall element 3 is in a stop state; first demagnetization processing (55); and operation-time zero adjustment processing (58, 59) of identifying an operation-time zero adjustment voltage data value Dad2 indicating an operation-time zero adjustment voltage value Vad2 of the voltage for adjustment Vad such that a detection voltage V2 is zero when the Hall element 3 is in an operation state. Thereafter, the processing section starts regular zero adjustment processing, that means, the processing section performs stop processing (60, 61) of stopping the Hall element 3 with the voltage for adjustment Vad of the stop-time zero adjustment voltage value Vad1 being outputted to a negative feedback current generating section 7, and second demagnetization processing (62), and then starts driving of the Hall element 3 (63) and outputs the voltage for adjustment Vad of the operation-time zero adjustment voltage value Vad2 to the negative feedback current generating section 7.
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