Method and system for determining position of magnetic field detection part of current sensor and sensor

Abstract

The invention provides a method and system for determining the position of a magnetic field detection part of a current sensor, and the sensor. The method comprises the following steps: obtaining the size data of a copper bar wire; generating a plurality of simulation relative positions of the magnetic field detection part and the copper bar wire according to the size data to obtain a simulation relative position set; and traversing the simulation relative position set, carrying out simulation detection on the alternating-current frequency characteristics of the current sensor of the magnetic field detection component at the same simulation relative position and different simulation frequencies to obtain a simulation result, and taking the simulation relative position with the best alternating-current frequency characteristic in the simulation result as a setting position of the magnetic field detection component. The simulation relative position with the best alternating current frequency characteristic in the simulation result is used as the setting position of the magnetic field detection part in the current sensor, so that the influence of the skin effect on the sensitivity of the current sensor can be reduced by the obtained current sensor; and therefore, the error of the copper bar current sensor during measurement of the copper bar wire with the alternating current is reduced.

Description

technical field [0001] The invention relates to the field of magnetic induction, in particular to a method, system and sensor for determining the position of a magnetic field detection component of a current sensor. Background technique [0002] In recent years, power electronic systems such as new energy vehicles, photovoltaic power stations, communication base stations, and energy storage are gradually developing towards modularization, integration, high power density, and small size. Due to its small size and strong flow capacity, copper bars can meet the needs of the development of power electronic systems. [0003] However, due to the skin effect of the copper bar (busbar), the sensitivity of the traditional coreless copper bar current sensor changes with the current frequency. The copper bar current sensor without a magnetic core can accurately measure the DC current of the copper bar. But there will be a large error when measuring AC current. [0004] Moreover, when...

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Problems solved by technology

[0003] However, due to the skin effect of the copper bar (busbar), the sensitivity of the traditional coreless copper bar current sensor changes with the current frequency. The coreless copper bar current sensor can accurately measure the DC current of the copper bar. But there will be a large error when measuring AC current

[0004] Moreover, when the traditional coreless copper bar current sensor optimizes the frequency characteristics, it needs to perform special treatment on the local structure of the copper bar, which requires high processing accuracy, and needs to reduce the part of the copper bar, which will affect the copper bar. flow capacity

[0005] At present, the copper bar current sensor without magnetic core still has a large error when measuring the copper bar current. A large part of the reason is that when the copper bar current sensor is made, the position of the magnetic field detection component in the copper bar current sensor is not correct. Reasonable selection leads to the failure of the copper bar current sensor to meet the optimal standard, so that there is still a large difference in the measurement error

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