Investigation of discharge in a railgun by means of Rogowski coils

1997 ◽  
Vol 33 (1) ◽  
pp. 538-543 ◽  
Author(s):  
V.P. Fomichev ◽  
S.S. Pravdin
Keyword(s):  
Rogowski Coils

scholarly journals The role of magnetic sensors in the hybridisation and electrification of vehicles

2019 ◽  
Author(s):  
Marc Kramb ◽  
Rolf Slatter
Keyword(s):  
Power Electronics ◽  
Causal Chain ◽  
Rogowski Coil ◽  
Magnetic Sensors ◽  
Current Sensor ◽  
Electrical Currents ◽  
Limited Bandwidth ◽  
Switching Losses ◽  
Current Sensors ◽  
Rogowski Coils

Electrical currents need to be measured in a wide variety of different applications in the field of power electronics. However, the requirements for these measurement devices are becoming steadily more demanding regarding accuracy, size and especially bandwidth. In order to increase the power density of power electronics, as particularly important in the field of electromobility, there is a clear causal chain. Soft switching leads to higher efficiency and higher frequencies, which enable smaller dimensions for a given power output. Higher switching frequencies allow the size of magnetic components to be reduced significantly, resulting in more compact and lighter designs. This trend is now being reinforced by use of new wide bandgap semiconductor materials like silicon carbide (SiC) and gallium nitride (GaN), as their low on-resistances and low parasitic capacitances reduce switching losses. Conventional current sensor solutions, e.g. hallor shunt based sensors exhibit a limited bandwidth, typically less than 250 kHz. Other current sensors, like those based on the Rogowski-Coil, are capable of highly dynamic current measurement, but are significantly more expensive, larger and hence not suitable for large series applications. Furthermore, Rogowski-Coils are only capable of measuring alternating currents (AC), which prevents their use in applications where DC currents must also be measured. In order to meet the above mentioned requirements, magnetoresistive (MR) current sensors are ideally suited due to the fact that the bandwidth of the magnetoresistive effect extends up into the GHz-range. This paper describes the principle of operation and main performance characteristics of highly integrated MR current sensors and describes their benefits compared to other types of current sensor, in particular with regard to applications in the hybridisation and electrification of vehicles.

Design and Analysis of PCB Rogowski Coil Current Transformer

2014 ◽  
Vol 672-674 ◽  
pp. 984-988
Author(s):  
Biao Su ◽  
Li Xue Li ◽  
Yi Hui Zheng ◽  
Xin Wang ◽  
Yan Liu ◽  
...  
Keyword(s):  
Power System ◽  
High Sensitivity ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Electromagnetic Current ◽  
Current Transformers ◽  
Coil Current ◽  
Electronic Current ◽  
Rogowski Coils ◽  
Electronic Current Transformers

Electronic current transformers are more suitable for the development of power system compared with traditional electromagnetic current transformers. Rogowski coil current transformer is one of three electric current transformers. According to the measurement principle of Rogowski coils, the equivalent circuit of PCB Rogowski coils is analyzed. By using four PCB Rogowski coils combined, a PCB Rogowski coil current transformer is designed and tested. The results show that the designed PCB Rogowski coil transformer has good linearity and high sensitivity and measurement accuracy and it can meet the requirement of power system.

Current and voltage monitors on a pulsed-power accelerator “Gamma-1”

2014 ◽  
Vol 32 ◽  
pp. 1460328
Author(s):  
N. V. Zavyalov ◽  
V. S. Gordeev ◽  
A. V. Grishin ◽  
S. Yu. Puchagin ◽  
K. V. Strabykin ◽  
...  
Keyword(s):  
Voltage Divider ◽  
Pulsed Power ◽  
Program System ◽  
Voltage Sensors ◽  
Capacitive Voltage ◽  
Processing Information ◽  
Electric Parameters ◽  
Capacitive Voltage Divider ◽  
Rogowski Coils ◽  
Accelerator System

There is presented a system of registering electric parameters of high-current pulsed electron accelerator “Gamma-1” its output electric power being 1.5 TW. The accelerator system of registration makes it possible to register in a single time scale the voltage pulses with the amplitude up to 3 MV, current pulses with the amplitude up to 1 MA and duration from several nanoseconds to a microsecond. Into the system of registration there are included two-step resistive voltage dividers, capacitive voltage divider, Rogowski coils, sectionalized Rogowski coils, B-dots, shunts, transmission line, attenuators, oscilloscopes, program system. The program system is aimed at reading, transmitting and processing information from oscilloscopes on the archival computer and provides interaction with database of current and voltage sensors, cables and filters. For each registration session the system also forms a map of experiment where system configuration and experiment parameters are presented.

The printed circuit board Rogowski coils for plasma current measurements on the J-TEXT tokamak

2009 ◽  
Vol 17 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Y. H. Ding ◽  
G. Zhuang ◽  
X. Q. Zhang ◽  
W. G. Ba ◽  
M. Zhang ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Plasma Current ◽  
Printed Circuit ◽  
Rogowski Coils
Sign in / Sign up

Export Citation Format

Share Document