Multi-conductor current measurement system based on TMR tunnel magnetic resistance

The invention provides a multi-conductor current measurement system based on TMR tunnel magnetic resistance. The multi-conductor current measurement system comprises a TMR chip array and a processingunit connected with the output end of the TMR chip array. The TMR chip array comprises m TMR chips, and the m TMR chips are all located under the axial center line of the main measured conductor. Them TMR chips are sequentially arranged from top to bottom, the adjacent chips are arranged at equal intervals, the distance between the TMR chip with the smallest distance from the main measured conductor and the main measured conductor is equal to the distance between the adjacent chips, and the processing unit obtains the current of the measured conductor from the multiple conductors according tovoltage signals output by the TMR chips. Accurate current measurement can be carried out on conductors with different specifications, different purposes and different current levels of a high-voltagedirect-current power transm