scholarly journals Thermal and Electromagnetic Combined Optimization Design of Dry Type Air Core Reactor

Energies ◽  
2017 ◽  
Vol 10 (12) ◽  
pp. 1989 ◽  
Author(s):  
Fating Yuan ◽  
Zhao Yuan ◽  
Lixue Chen ◽  
Yong Wang ◽  
Junxiang Liu ◽  
...  
Keyword(s):  
Optimization Design ◽  
Air Core

scholarly journals Noise Optimization Design of Frequency-Domain Air-Core Sensor Based on Capacitor Tuning Technology

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 194
Author(s):  
Shengbao Yu ◽  
Yiming Wei ◽  
Jialin Zhang ◽  
Shilong Wang
Keyword(s):  
Frequency Domain ◽  
Optimization Design ◽  
Signal To Noise Ratio ◽  
Experimental Tests ◽  
Impedance Analysis ◽  
Physical Structure ◽  
Normal Operation ◽  
Amplifier Circuit ◽  
Noise Current ◽  
Air Core

In the semi-aviation frequency-domain electromagnetic measurement, the induction air-core coil and the differential pre-amplifier circuit introduce noise, which affects the sensor and results in receiving weak signals and improving the signal-to-noise ratio of the system. In response to this problem, by analyzing the physical structure of the air-core coil sensor and the mechanism of the amplification circuit, combined with the simulation and experimental tests of voltage noise, current noise, resistance noise and other noise components, analyzed that the thermal noise is the main component of the sensor noise in the system frequency band, but directly removing the matching resistor increases the instability of the circuit, causes the coil to work in an underdamped state, and generates a time domain oscillation at the resonant frequency, source impedance analysis and analysis of differential pre-amplifier circuit in the frequency-domain detection method, abandoning the matching resistance scheme and magnetic flux negative feedback scheme. The matching capacitor is added to make the receiver detect the frequency range in the 1–10 kHz range. In normal operation, the noise level reaches 10 nV level, which not only increases the stability of the circuit, but also reduces the noise of the sensor. It has far-reaching significance for the detection of weak frequency signals.

scholarly journals Thermal performance analysis and optimization design of dry type air core reactor with the double rain cover

2021 ◽  
pp. 67-67
Author(s):  
FaTing Yuan ◽  
Shouwei Yang ◽  
Shihong Qin ◽  
Kai Lv ◽  
Bo Tang ◽  
...  
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Temperature Rise ◽  
Optimization Design ◽  
Orthogonal Experiment ◽  
Structural Parameters ◽  
Fluid Velocity ◽  
Optimization Method ◽  
Design Parameters ◽  
Air Core

In this paper, a fluid-thermal coupled finite element model is established according to the design parameters of dry type air core reactor. The detailed temperature distribution can be achieved, the maximum error coefficient of temperature rise is only 6% compared with the test results of prototype, and the accuracy of finite element calculate method is verified. Taking the equal height and heat flux design parameters of reactor as research object, the natural convection cooling performance of reactor with and without the rain cover is investigated. It can be found that the temperature rise of reactor is significantly increased when adding the rain cover, and the reasons are given by analyzing the fluid velocity distribution of air dcuts between the encapsulation coils. In order to reduce the temperature rise of the reactor with the rain cover, the optimization method based on the orthogonal experiment design and finite element method is proposed. The six factors of the double rain cover are given, which mainly affect the temperature rise of reactor, and the five levels are selected, the influence curve and contribution rate of each factor on the temperature rise of reactor are analyzed. The results show that the contribution ratio of the parameter H1, L1 and L2, are obviously higher than the parameter H2, L3 and ?, so the more attention should be paid in the design of double rain cover. Meanwhile, the optimal structural parameters of rain cover are given based on the influence curves, and the temperature rise is only 43.25?C. The results show that the optimization method can reduce the temperature rise of reactor significantly. In addition, the temperature distribution of inner encapsulations coils of reactor are basically the same, the current carrying capacity of coils can be fully utilized, which provides an important guidance for the optimization design of reactor.

Research of electromagnetic and thermal optimization design on air core reactor

2018 ◽  
Vol 13 (5) ◽  
pp. 725-731 ◽  
Author(s):  
Fating Yuan ◽  
Zhao Yuan ◽  
Yong Wang ◽  
Junxiang Liu ◽  
Haibo Su ◽  
...  
Keyword(s):  
Optimization Design ◽  
Thermal Optimization ◽  
Air Core

scholarly journals Optimization Design of Oil-Immersed Air Core Coupling Reactor for a 160 kV Mechanical Direct Current Circuit Breaker

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1104
Author(s):  
Fating Yuan ◽  
Bo Tang ◽  
Can Ding ◽  
Shihong Qin ◽  
Zhao Yuan ◽  
...  
Keyword(s):  
Direct Current ◽  
Optimization Design ◽  
Circuit Breaker ◽  
Element Model ◽  
Basic Structure ◽  
Optimization Method ◽  
Design Parameters ◽  
Secondary Current ◽  
Air Core ◽  
Oil Tank

In this paper, the basic structure and design parameters of an oil-immersed air core coupling reactor were given according to the interruption requirement of the 160 kV mechanical direct current circuit breaker, and a field-circuit coupled finite element model was established based on the ANSOFT simulation platform. The prototype test results verified the correctness of the simulation calculation method. The coupling reactor design was optimized to minimize the total volume, taking equal height and heat flux design parameters as the optimization object, and the influence of the insulation distance between the oil tank and encapsulations on the secondary current of the coupling reactor were analyzed. Meanwhile, a combined optimization method about the reactor body and oil tank was proposed, and the optimization contour surface was plotted, which described the relationship between the total volume of the coupling reactor and structure parameters of the reactor body and oil tank. According to the optimization design results, the total volume was only 89% compared with the initial design parameters, and the correctness was verified by the simulation results.

scholarly journals Design of High-Performance Magnetorquer with Air Core for CubeSat

2018 ◽  
Vol 36 (1) ◽  
pp. 1-6
Author(s):  
Bo Bai ◽  
Jun Zhou ◽  
Shengyun Wang
Keyword(s):  
Power Consumption ◽  
Magnetic Moment ◽  
High Performance ◽  
Optimization Design ◽  
Design Method ◽  
Mass Model ◽  
Air Core ◽  
Support Size ◽  
Limited Mass ◽  
Magnetic Induction Intensity

To solve the problem that how to design a big magnetic moment, small size, light weight, low power consumption magnetorquer with air core under the constraint of limited volume and power in CubSate, multiobjective optimization design method is used. Firstly, based on the structure of the square support with multiple layer of the enameled wire wrapped, the magnetic moment model, power consumption model and mass model are deduced from square support size, enameled wire diameter and turn number, respectively. Secondly, according to the model of magnetic moment and power consumption, the multi-objective optimization design of magnetorquer with genetic algorithm (GA) is used under the constraint of limited mass and volume. Thirdly, based on the relation between the magnetic moment and the magnetic induction intensity, the measurement method of the magnetic moment is designed. Finally, the designed parameter is implemented. The test result showed that the designed magnetorquer has the qualities of high linearity, low remanence, and it well met the requirements of CubeSat standard. The designed magnetorquer successfully applied in several CubeSats indicates the reliability of this design scheme.

scholarly journals NSGA-II Algorithm with a Local Search Strategy for Multiobjective Optimal Design of Dry-Type Air-Core Reactor

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Chengfen Zhang ◽  
Xikui Ma
Keyword(s):  
Local Search ◽  
Production Cost ◽  
Optimization Design ◽  
Distribution Systems ◽  
Search Strategy ◽  
High Efficiency ◽  
Nsga Ii ◽  
Air Core ◽  
Local Search Strategy ◽  
Operation Cost

Dry-type air-core reactor is now widely applied in electrical power distribution systems, for which the optimization design is a crucial issue. In the optimization design problem of dry-type air-core reactor, the objectives of minimizing the production cost and minimizing the operation cost are both important. In this paper, a multiobjective optimal model is established considering simultaneously the two objectives of minimizing the production cost and minimizing the operation cost. To solve the multi-objective optimization problem, a memetic evolutionary algorithm is proposed, which combines elitist nondominated sorting genetic algorithm version II (NSGA-II) with a local search strategy based on the covariance matrix adaptation evolution strategy (CMA-ES). NSGA-II can provide decision maker with flexible choices among the different trade-off solutions, while the local-search strategy, which is applied to nondominated individuals randomly selected from the current population in a given generation and quantity, can accelerate the convergence speed. Furthermore, another modification is that an external archive is set in the proposed algorithm for increasing the evolutionary efficiency. The proposed algorithm is tested on a dry-type air-core reactor made of rectangular cross-section litz-wire. Simulation results show that the proposed algorithm has high efficiency and it converges to a better Pareto front.

Eddy Current Losses Analysis and Optimization Design of Litz-Wire Windings for Air-Core Compulsators

2019 ◽  
Vol 47 (5) ◽  
pp. 2532-2538 ◽  
Author(s):  
Weiduo Zhao ◽  
Xuejiao Wang ◽  
Shaopeng Wu ◽  
Shumei Cui ◽  
Chris Gerada ◽  
...  
Keyword(s):  
Eddy Current ◽  
Optimization Design ◽  
Eddy Current Losses ◽  
Air Core
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