阅读说明：本技术 一种用于压接式igbt内部电流测量的圆形pcb罗氏线圈 (Circular PCB Rogowski coil for measuring internal current of crimping type IGBT ) 是由 焦超群 赵卫超 张作明 于 2019-10-14 设计创作，主要内容包括：本发明公开了一种用于压接式IGBT内部电流测量的圆形PCB罗氏线圈,结合4.5kV/1.2kA压接式IGBT器件的凸台布局,设计了一种圆形PCB Rogowski线圈,该线圈的设计包括：线圈内径、外径、线圈匝数等参数的合理选择。圆形PCB Rogowski线圈具有响应频带宽、测量范围大、无磁滞和饱和现象、抗干扰能力强、易于微机化和网络化等优点,其测量原理是PCB Rogowski线圈嵌套在压接式IGBT的凸台上形成闭环,依据电磁感应定律,通过感应被测凸台中交变电流产生的变化磁场来间接反映被测电流的大小。(The invention discloses a circular PCB Rogowski coil for measuring internal current of a crimping type IGBT, which is designed by combining boss layout of a crimping type IGBT device of 4.5kV/1.2kA, and the design of the coil comprises the following steps: and reasonably selecting parameters such as the inner diameter, the outer diameter, the number of turns of the coil and the like of the coil. The measuring principle is that the PCB Rogowski coil is nested on a boss of the crimping type IGBT to form a closed loop, and the magnitude of the current to be measured is indirectly reflected by inducing a changing magnetic field generated by alternating current in the boss according to an electromagnetic induction law.)

1. The utility model provides a circular PCB luo shi coil for inside current measurement of crimping formula IGBT which characterized in that: on one hand, the structural parameters of the circular PCB Rogowski coil are strictly designed according to a crimping type IGBT boss structure; on the other hand, the fishbone-shaped wiring scheme of the circular PCB Rogowski coil eliminates noise interference caused by external current so as to improve the measurement accuracy.

2. The circular PCB Rogowski coil for the internal current measurement of the crimp-type IGBT according to claim 1, is characterized in that: the inner diameter and the outer diameter of the coil are respectively 13.4mm and 19.6mm strictly according to the boss layout of the crimping type IGBT device.

3. The circular PCB Rogowski coil for the internal current measurement of the crimp-type IGBT according to claim 1, is characterized in that: the wiring scheme of fish bone shape is adopted, the main line of walking of coil is distributed at top layer and bottom, and the second floor is the layer of returning the line, is connected through a via hole between each layer, can overcome the interference factor that the wire winding mode of traditional coil brought to the realization is measured the electric current on the boss under the condition that does not change device inner structure.

Technical Field

The invention relates to the field of high-frequency current measurement, in particular to measurement of internal current of a crimping type IGBT device

Background

With the development of flexible direct current transmission technology, the crimping type IGBT device is considered as the first choice device of the high-voltage direct current circuit breaker due to the characteristics of low control power, large current capacity and high switching speed. Due to the arrangement mode of the boss inside the device, the current of the parallel chips inside the device is unbalanced in the switching-on and switching-off processes, and the reliability of the device is influenced. The internal current measuring technology mainly adopts a Rogowski coil, and the traditional Rogowski coil is wound manually, so that the condition of non-uniform winding is easy to occur, the impedance among the coils is greatly different, and the measuring result is greatly influenced. Therefore, a measuring module capable of overcoming the interference factor caused by the conventional winding manner of the coil is required to improve the accuracy of the measuring technology.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a circular PCB Rogowski coil for measuring the internal current of a crimping type IGBT.

The technical scheme adopted by the invention is as follows: a circular PCB Rogowski coil is designed by combining a boss layout of a Westcode 4.5kV/1.2kA crimping type IGBT device, and the design of the coil comprises the following steps: the reasonable selection of coil internal diameter, the external diameter, walk line width, via hole size, coil turns isoparametric, through the analysis, finally adopt the wiring scheme of fishbone shape, coil internal diameter, external diameter are taken to be 13.4mm, 19.6mm respectively, the main line distribution of walking of coil is at top layer and bottom, the second floor is the layer of returning the line, be connected through a via hole between the layer, the circular PCB Rogowski coil that designs can be stable nestification on the inside boss of crimping formula IGBT device, carry out the measurement of internal current.

Compared with the existing measurement product, the circular PCB Rogowski coil has the advantages that the interference factor caused by the winding mode of the traditional coil can be overcome, and the current of the boss in the crimping type IGBT can be measured under the condition that the internal structure of the device is not changed.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a 3D diagram of a PCB Rogowski coil

FIG. 2 is a PCB Rogowski coil design

FIG. 3 is a diagram of a PCB Rogowski coil

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, wherein fig. 1 is a 3D diagram of a PCB Rogowski coil, and an ANSYS Q3D Extractor electromagnetic simulation analysis tool is used to perform simulation analysis on the proposed PCB Rogowski coil regarding the influence of each azimuthal current noise interference on the coil sensitivity, so as to obtain a fishbone-shaped wiring scheme capable of eliminating noise interference caused by external current to the greatest extent; further drawing a circular PCB Rogowski coil design drawing as shown in FIG. 2 by utilizing an aluminum Designer, wherein the inner diameter and the outer diameter of the coil are respectively 13.4mm and 19.6mm, main wires of the coil are distributed on the top layer and the bottom layer, the second layer is a wire return layer, and the layers are connected through a through hole; and finally, the coil is manufactured into a real object, the real object diagram of the circular PCB Rogowski coil is shown in figure 3, the coil is embedded on a boss inside a crimping type IGBT, when the IGBT is switched on or switched off, the current of a chip can be measured through two lead ports of the coil, and due to the stable structure of the coil, the interference factor caused by a winding mode of a traditional coil can be overcome, and the current on the boss can be measured under the condition that the internal structure of a device is not changed.

The invention is suitable for measuring the internal current of the crimping type IGBT device with 4.5kV/1.2kA, and is also suitable for crimping type IGBT devices with different structures and different power grades.