Temperature compensator of Hall detection current sensor

Abstract

The invention relates to a temperature compensator of a Hall detection current sensor. The temperature compensator comprises a stabilized voltage source, a constant current source with a Hall element H and a diode D in a same environment with the Hall element H, wherein the diode D is connected between the stabilized voltage source and the constant current source in series, the stabilized voltage source is connected with an anode of the diode D, and the constant current source is connected with a cathode of the diode D. By adoption of the temperature compensator disclosed by the invention, the problem that measurement error of the Hall detection current sensor is affected due to changes in ambient temperature can be solved, the range of accuracy affected due to the change in the temperature when the Hall detection current sensor detects current once is ensured to be within a nominal measurement error range, the using requirements can be met and actual effect is good.

Description

technical field [0001] The invention relates to a temperature compensator for a Hall direct measuring type direct current large current sensor. Background technique [0002] In the prior art, the detection principle and manufacturing process of the Hall direct-current high-current sensor are basically mature, but the measurement accuracy of the sensor due to the change of the ambient temperature has not been fundamentally solved. In the prior art, a single point is usually used to compensate the temperature variation trend of the Hall element in the air gap. Due to certain limitations of this technology, it is unavoidable to be affected by factors such as ambient temperature, day-night temperature difference, and seasonal temperature difference, which will inevitably cause a large indication value deviation of the measurement signal as the temperature changes, causing the current indication value measured by the sensor to correspond to the primary bus. The generated real cu...

AI Technical Summary

Problems solved by technology

Due to the limitations of this technology, it is unavoidable to be affected by factors such as ambient temperature, day-night temperature difference, and seasonal temperature difference, which will inevitably cause a large indication value deviation of the measurement signal as the temperature changes, causing the current indication value measured by the sensor to correspond to the primary bus. The generated real current is inaccurate and unstable, which affects the measurement accuracy of the sensor

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