Hall current sensor module

Abstract

A Hall current sensor module comprises a PCB, and a to-be-monitored signal connection interface, at least one Hall current sensor circuit and an external power supply connection end which are arrangedon the PCB. The to-be-monitored signal connection interface serves as a to-be-monitored signal input end of the Hall current sensor module and comprises a pluggable interface. The Hall current sensorcircuit is used for monitoring one path of to-be-monitored signal, comprises a Hall device, a filtering and amplifying circuit and a monitoring result signal output end, and is used for converting one path of to-be-monitored current signal input into the to-be-monitored signal connecting interface into a linear voltage signal; outputting the filtered and amplified signals to an IO port of a controller through a monitoring result signal output end so that the controller can obtain a monitoring result. Because the to-be-monitored signal connection interface is a plug-in interface, the Hall current sensor circuit is used in a plug-in mode, the maintenance is convenient, the replacement is easy, and the product design and maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a Hall current sensor module. Background technique [0002] In the power electronic system, the measurement result of the current provides the necessary signals for the system to measure, control, relay protection, etc. Therefore, the measurement requirements are high, and high accuracy and stability are required. At present, the low-power current sampling method mainly adopts an isolated operational amplifier and a Hall current sensor. The accuracy and stability of the isolated operational amplifier measurement method are very good, so it is widely used in the power electronics industry, but its primary and secondary sides need independent power supply, so the design requirements for the auxiliary source are higher, and it needs to be in the output The strong current terminal collects the current signal and needs to do some processing before it can be sent to the IO of the chi...

AI Technical Summary

Problems solved by technology

The accuracy and stability of the isolated operational amplifier measurement method are very good, so it is widely used in the power electronics industry, but its primary and secondary sides need independent power supply, so the design requirements for the auxiliary source are higher, and it needs to be in the output The strong current terminal collects the current signal and needs to do some processing before it can be sent to the IO of the chip. Therefore, the safety and EMC requirements of the isolated operational amplifier need to be considered in the PCB design, thereby increasing the design cost.

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