Multi-disk inductive shunt

Abstract

The invention provides a multi-disc induction shunt, the induction shunt is composed of induction shunt elements cascaded in sequence, and the induction shunt elements of each stage of the induction shunt formed by successive cascading have a two-disk structure; The two-stage induction shunt element is a two-stage structure induction shunt element, and the third-stage and subsequent induction shunt elements are single-stage structure induction shunt elements, or any one of the two-stage structure induction shunt elements; The core of the dual-stage structure induction shunt element is composed of a main iron core and a shielding iron core, and the single-stage structure induction shunt element is composed of a single main iron core, and the iron core is made of high magnetic permeability material. This multi-disk induction shunt improves the problem of small range of single-disk induction shunt, solves the problem of low precision of existing multi-disk induction shunt, and greatly improves the load capacity of multi-disk induction shunt, and also reduces current mutual inductance complexity and cost of device verification systems.

Description

Technical field: [0001] The invention relates to a shunt, in particular to a multi-disc induction shunt. Background technique: [0002] With the development of AC power transmission and transformation technology, people put forward higher and higher requirements for the measurement and measurement of power frequency current in terms of range and accuracy. The earliest power frequency current measuring instrument is a large current resistor, which is customarily called As a shunt, so far, the shunt is still used to measure the power frequency current. The advantages of the resistive shunt are simple structure and high accuracy, but this kind of shunt will generate heat when used under high current. The change of the resistance value of the resistor consumes a lot of energy on the other hand. [0003] With the development of technology, current transformers based on the principle of transformers have generally replaced the original resistive shunts, especially new ferromagnet...

AI Technical Summary

Problems solved by technology

If the current ratio is set too much, the size of a single induction shunt is difficult to control, and the cost will increase greatly, and some current ratios cannot be covered, and the small range of a single-disk induction shunt limits its application.

[0005] The existing multi-disc induction shunt is composed of multi-level induction shunt elements cascaded. The induction shunt elements at each level are a single-stage structure with a core composed of a main iron core. The load capacity is not strong, and there is no magnetic shield to reduce magnetic errors. The error of the stage induction shunt element is large

And the induction shunt elements at all levels are directly connected, which will generate additional errors and the accuracy is relatively low

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