A high-precision flexible current transformer with consistent performance and method of making the same

Abstract

The invention discloses a high-precision flexible current transformer with uniform performance. A positioning groove is formed in a flexible mounting strip. A first FPC (flexible printed circuit) and a second FPC are arranged in mounting grooves respectively. Inclined copper wires are arranged on the outer side faces of the first FPC and the second FPC respectively. Pressure welding points corresponding to two ends of the copper wires are arranged on the inner side faces of the first FPC and the second FPC respectively. The pressure welding points are connected with the corresponding copper wires. Pressure welding points of the first FPC and the second FPC are connected in a pressure welding mode, and a loop coil is formed by the copper wires of the first FPC and the second FPC. A flexible deformable structure which is small in occupied space, flexible to use and wide in application range is provided; on the FPCs, thickness, moving direction and distribution density of the copper wires can be customized so as to replace winding of copper wire coils, so that the problems of nonuniform winding and tightness are solved, and product precision and performance uniformity are improved.

Description

technical field [0001] The invention discloses a current transformer, in particular a high-precision flexible current transformer with consistent performance and a manufacturing method thereof. Background technique [0002] In AC current measurement technology, for current sampling methods, currently commonly used methods are resistance sampling, toroidal current transformer sampling and Hall current sensor sampling. At present, the toroidal coil current transformer in the prior art usually consists of three parts: a toroidal high magnetic permeability material (abbreviated as a magnetic ring), a coil and an insulating shell material. It has the following problems: 1. The winding distribution of the coil is uneven and the tightness is inconsistent during the winding process, which easily leads to nonlinear blind spot errors, inconsistent performance, and inconsistent accuracy. 2. The overall size of the current transformer is large and takes up a lot of space. 3. The shape...

AI Technical Summary

Problems solved by technology

It has the following problems: 1. The winding distribution of the coil is uneven and the tightness is inconsistent during the winding process, which easily leads to nonlinear blind spot errors, inconsistent performance, inconsistent accuracy, etc.

2. The current transformer has a large overall volume and takes up a lot of space

3. The shape is fixed, and there is not enough flexible space for related product design and engineering, so it is impossible to imagine in the thin and small direction

Images