Hall current sensor electronic circuit

Abstract

The invention discloses a Hall current sensor electronic circuit which comprises a first current induction circuit, a second current induction circuit and a reference voltage circuit. The Hall current sensor electronic circuit is characterized in that the reference voltage circuit is used for providing stable voltage to input ends of the first and second current induction circuits; the first and second current inductor circuits have a consistent structure and respectively consist of a Hall element, an in-phase proportional amplification circuit and an instrument amplifier circuit; an output end of the in-phase proportional amplification circuit is connected to an input end of the Hall element; an output end of the Hall element is connected to an input end of the instrument amplifier circuit; and the in-phase proportional amplification circuit is a standard in-phase proportional amplification circuit; the instrument amplifier circuit is a standard instrument amplifier circuit; and the reference voltage circuit is a standard voltage reference circuit. The invention aims at overcoming the defects in the prior art and providing the current sensor electronic circuit which is simple in structure, practical and reliable, low in cost, small in volume and easy to operate.

Description

technical field [0001] The invention belongs to the field of sensors, and in particular relates to an electronic circuit of a Hall current sensor. Background technique: [0002] At present, the current sensor technology is becoming more and more mature and gradually moving towards marketization. The competition among various manufacturers is becoming increasingly fierce. How to reduce costs and improve performance is becoming more and more important. Current acquisition is essential in the controller, and the following problems exist in the use of commercially available current sensors: 1. The size is large, which is not conducive to installation and the size of the controller is reduced; 2. The cost is high, and the cost of the current sensor is very high; 3. , Narrow bandwidth, narrow bandwidth in high-speed sampling circuits, resulting in system instability. And it is generally a single-channel current acquisition. If it is used in an AC motor controller, at least two to...

AI Technical Summary

Problems solved by technology

Current acquisition is essential in the controller, and the following problems exist in the use of commercially available current sensors: 1. The size is large, which is not conducive to installation and the size of the controller is reduced; 2. The cost is high, and the cost of the current sensor is very high; 3. , Narrow bandwidth, narrow bandwidth in high-speed sampling circuits, resulting in system instability

And it is generally a single-channel current acquisition. If it is used in an AC motor controller, at least two to three current acquisition channels are required, and several sensors need to be used together, which makes the traditional current sensor more expensive and bulky.

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