A High-Precision Hall High-Current Sensor Detection Source

There is no unified standard for the measurement and detection of Hall current sensors at presently. Manufacturer makes equipment for measurement and detection according to their own verification scheme. The High current detection standard device is the key device to verify the Hall current sensor, and its output current accuracy directly determines the measurement accuracy of the high-current Hall sensor. Therefore, a Hall high current sensor detection device scheme is proposed in this paper. The main circuit adopts a multi-phase Buck converter interleaved and parallel topology, which can not only reduce the total output current ripple, improve the output precision, but also reduce the current stress of each phase Buck converter. Aiming at the problem of current imbalance caused by parameter differences between components, the master-slave current sharing method is used to perform closed-loop feedback control to achieve current sharing between modules. Finally, the simulation results in PSIM show that the total output current of the four-phase Buck converter is 100A, and the output current ripple ratio is 0.1%.