Unlock instant, AI-driven research and patent intelligence for your innovation.

Drift amount calculating method of current sensor and calculating device

A current sensor and calculation method technology, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of overall drift, large deviation of current value measurement, etc., and achieve the effect of improving measurement accuracy

Active Publication Date: 2015-08-12
BEIJING BORGWARD AUTOMOBILE CO LTD
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For current sensors, especially Hall current sensors, the measured current value may also drift overall due to overload, temperature or other factors, resulting in a large deviation in the measurement of the current value

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Drift amount calculating method of current sensor and calculating device
  • Drift amount calculating method of current sensor and calculating device
  • Drift amount calculating method of current sensor and calculating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0029] The method for calculating the drift amount of the current sensor and the device for calculating the drift amount of the current sensor according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0030] figure 1 It is a flow chart of a method for calculating the drift amount of a current sensor according to an embodiment of the present invention. like figure 1 As shown, the drift calculation method of the current sensor includes:

[0031] S1: When no curre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a drift amount calculating method of a current sensor and a calculating device. The method comprises the following steps: S1, when no current flows through a to-be-detected device, acquiring current drift values of the current sensor in a current range in a real-time manner; S2, successively storing the current drift values to positions of an M row in an M*N matrix according to the first-in first-out principle, wherein N is a range number of the current sensor; S3, judging whether the number i of the currently acquired current drift values is less than M, wherein i is greater than or equal to 1; and S4, if the number i of the current acquired current drift values is less than the M, performing average calculation on the i current drift values to obtain the drift amount of the current sensor. Therefore, the drift amount of the current sensor is obtained according to the i current drift values acquired in real time, the drift amount of the current sensor can be dynamically acquired, correction can be timely performed on a current sampled by the current sensor, and measurement precision of the current sensor is improved.

Description

technical field [0001] The present invention relates to the technical field of power electronics, in particular to a method for calculating the drift amount of a current sensor and a device for calculating the drift amount of the current sensor. Background technique [0002] At present, current sensors have been widely used in all walks of life and various occasions for current measurement. Especially with the development of EV (Electric Vehicle, pure electric vehicle) / HEV (Hybrid Electric Vehicle, hybrid electric vehicle), the current sensor plays a more important role, and at the same time, higher requirements are put forward for measurement accuracy. [0003] In the related art, a fixed offset is usually set according to the manual to correct the current sampled by the current sensor, without considering that the drift will change during use. The current value measured by the current sensor, especially the Hall current sensor, may also drift overall due to overload, temp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
Inventor 李凌峰
Owner BEIJING BORGWARD AUTOMOBILE CO LTD