A5101572436- Electric Motor Design and Analysis
- Microgrid Control and Optimization
- Magnetic Bearings and Levitation Dynamics
- Radiation Effects in Electronics
- Magnetic Properties and Applications
- Power Systems and Renewable Energy
- Multilevel Inverters and Converters
- Semiconductor materials and devices
- Smart Grid Energy Management
- Islanding Detection in Power Systems
- Integrated Circuits and Semiconductor Failure Analysis
- Hybrid Renewable Energy Systems
- VLSI and Analog Circuit Testing
- Sensorless Control of Electric Motors
- Hydraulic and Pneumatic Systems
- Electromagnetic Launch and Propulsion Technology
- Induction Heating and Inverter Technology
- Robotic Locomotion and Control
- Advanced Sensor and Control Systems
- Industrial Technology and Control Systems
- Photovoltaic System Optimization Techniques
- Pulsed Power Technology Applications
- Reliability and Maintenance Optimization
- Radiation Detection and Scintillator Technologies
- Advanced Memory and Neural Computing
Yanshan University
2006-2025
Southeast University
2016-2024
Northwest Institute of Nuclear Technology
2006-2022
Xi'an Jiaotong University
2010-2021
Wuhan University of Technology
2014
Beihang University
2011-2012
Mudanjiang Medical University
2012
Institute of Electrical Engineering
2011
Sichuan University
2010-2011
Northeast Petroleum University
2009
This paper proposes a new method for fast radial vibration computation in switched reluctance motors. Only piecewise first-order linear function is used to calculate the total peak acceleration, which rather fast. The overall superposition of natural oscillation each mode. Before that, several critical parameters need be calculated or measured advance, including weight factor, frequency and damping ratio mode, order obtain respective analytical expression First, acceleration concerning...
Abstract A hybrid microgrid powered by hydrogen is an energy infrastructure that depends on as its primary carrier within a localized network. This study proposed novel bi-level optimization approach to enhance power quality and cost efficiency of the system. In quest improve management systems (EMS) quality, named Particle swarm optimization-Modified water wave (PSO-MWWO) has been proposed. method integrates adaptive population size wavelength coefficient boost overall effectiveness. It...
It is well-known that current and radial vibration harmonic may cause resonance will thus severe acoustic noise in a switched reluctance motor (SRM). However, not each order of resonance. has been fully discussed which the most important. This paper proposes an analytical method to derive important vibration, lays significant foundation for reduction method. Then, influence different switch angles on analytically derived comprehensively discussed. Based that, can be reduced by optimal angle...
The accurate model of switched reluctance motor (SRM) is critical for performance prediction. However, due to the doubly salient structure, flux linkage SRM a non‐linear function with phase current and rotor position, which makes determination characteristic very difficult. In this study, indirect measurement method used obtain sample data least square support vector machine (LSSVM) prediction linkage. First, basic principles exact methods realisation are presented. Second, errors in...
This paper addresses the low-frequency relative stability problem of grid-connected voltage source inverter (VSI) based distributed generation (DG) unit in microgrid, which conventional active power-frequency (P-ω) and reactive power-voltage (Q-E) droop controllers are commonly used to share loads. In sense characteristic equation eigenvalues, transient response remarkably affected by change gains and/or stable operating points, resulting poor damping eventually instability. An improved P-ω...
Good current tracking is beneficial to the torque ripple suppression methods like profiling techniques for switched reluctance machines (SRMs). An intersection-method-based controller SRM with robust performance proposed in this article. First, aid of predicted at next sampling instant, prestored reference current, and flux-linkage information, required duty cycle control period under specific estimated through intersection method. To compensate difference between adopted model real ones...
The wide application of switched reluctance motor has been limited due to its high acoustic noise, which is mainly caused by radial vibration. In this study, a new vibration model proposed consisting acceleration impulse and natural oscillation model. developed based on the measured sample data using least‐square support vector machine method. Natural also superposition each frequency, obtained finite element built up in MATLAB/Simulink various experiments have conducted verify accuracy
This paper investigates the possibility of applying embedded magnetic encoder (EME) consisting three linear Hall sensors (LHS) for rotor position estimation in SRM. The key concept this scheme is to detect flux density characteristics (FDC) inside stator slots. However, armature field be detected SRM, which rather different from permanent magnet (PM) machines, where PM detected. In paper, FDC slot openings are firstly analyzed between winding configurations. Thus, a selection principle...
Radial vibration and torque ripple are the most two important factors to acoustic noise, especially when resonance is excited. This study focuses on radial vibration, which composed of impulse fundamental vibration. The respective influence components noise analysed. It experimentally demonstrated that more significant compared with impulse. Accordingly, based already proposed randomising turn‐on angle method, reduction effect method analysed in detail using different control parameters like...
In this paper, a triple current slope difference threshold based low-speed sensorless scheme for low-cost SRM drives is proposed. Firstly, methods, including the method, are proposed and advantages in terms of anti-interference ability over traditional instantaneous value methods have been clarified. Secondly, single/double corresponding outgoing/incoming phase injection types introduced comprehensively compared. The limitations conventional while adopted stated. Accordingly, to solve...
A single-phase grid-connected inverter system with a novel current control strategy is presented in this paper. The controller consists of proportional regulator and new type resonant regulator. Compared traditional PI methods, the P+resonant (PR) can introduce an infinite gain at fundamental frequency hence achieve zero steady-state error. more practical quasi-PR used based on theoretical analysis. In paper, step by procedure for designing proposed verified experiments. Theoretical analysis...
DC injection suppression is crucial for the transformerless PV systems. IEEE Std.929-2000 specifies that systems shall not inject dc current greater than 0.5% of full rated output current. measurement only useful evaluating whether a system meets standards, but also effective with injecting an equal opposite component via proper control scheme. In practice, however, it difficult to extract very low-level (0.5% I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
For sensorless control of switched reluctance motor, it is significant to improve the accuracy angle estimation. In traditional current-gradient method, thought that null current gradient point appears just at pole overlap position without considering magnetic saturation, which exploited as reference in cycle. However, actual varies with operation condition. this paper, firstly, change rate phase was derived saturation; And then effects dc bus voltage, turn-on angle, speed and load torque on...
Radiation damage in electronic devices is one of the key factors determining survival probability on-orbit spacecraft. Thus, it has remained an important topic field radiation-hardening technology. High reliability, high integration, performance, low power consumption, and cost are requirements for development next-generation systems. For space systems, use radiation-hardened high-performance nano-devices will continue to be trend. Based on thorough reviewing research status at home abroad,...
In cost-sensitive applications, the controller usually creates great noise that affects current sampling accuracy. this article, based on conventional direct drive low-speed position sensorless control of switched reluctance machine (SRM), a high-precision injection scheme is proposed to improve accuracy and thus commutation First, errors in are analyzed quantitatively. Second, aiming at reducing noise, dual-channel circuit Third, pulse peak value prediction method curve intersection...
A hydrogen-based microgrid (MG) is an energy system that uses hydrogen as a primary carrier within localized grid. Numerous alternative approaches and concepts are found concerning the management of renewable systems. This study proposes novel approach to assess (EMS) optimal Energy Storage Systems (HBESS) at minimal total cost, employing particle swarm optimization (PSO) fuzzy control in stand-alone microgrids. Together, these methods effectively address challenges hybrid microgrids (HMGs)....
This study investigates the origin of resonance in switched reluctance motor (SRM). It has been found that second‐order harmonic component phase current is one major origins, which may cause when its frequency multiplied by three caused phases coincides with natural frequency. also demonstrated there a natural‐frequency‐centred band, saying as long excitation or harmonics locates will be excited. Accordingly, influence critical parameters such turn‐on and turn‐off angles on corresponding...
Low-energy protons are able to generate enough energy through direct ionization cause a high single event upset cross section as the feature size of semiconductor devices shrinks. It poses large challenge on present proton modeling test technique and space rate prediction method. Experimental study effect in three different sizes static random access memory (SRAM) (i.e. 65 nm, 90 250 nm) is carried out based domestic low-energy accelerators also foreign middle-high accelerators. Complete...
Due to the lack of available spallation neutron source, atmospheric single event effect (SEE) in China were studied mainly by means simulation and energy test. Since Chinese source (CSNS) passed national acceptance, it has become possible carry out research on SEE using CSNS. In this paper, experiments 3 kinds SRAMs with different feature sizes are carried for first time CSNS back-n. The application back-n study is evaluated comparing results earlier plateau experiment. show that cross...