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Nowadays, the electrical traction system is gaining more and more attentions since it is regarded as the most promising solution to ease energy crisis, air pollution and global warming. As one of the key devices, the electrical motors determine the main performance of the transport system. In this paper, a synthesis of synchronous motors for traction applications is presented. Since PM motors have...
As a virtual backbone structure, connected dominating sets (CDSs) play an important role in topology control for wireless networks. In this paper, we develop a distributed self-stabilizing CDS construction algorithm under the SINR model (also known as the physical interference model), a more practical yet more challenging interference model for distributed algorithm design. Specifically, we propose...
In this paper, an analytical model in the dq reference frame is developed to recognize the steady-state of the self-excited reluctance generator, considering no-load and resistive load conditions. A fast method to estimate the minimum capacitance requirements is proposed. Experiments are carried out to verify the analytical results. After that, attention is paid on the capability of self-excitation...
Screen Content Coding (SCC) is the extension of the latest video compression standard High Efficiency Video Coding (HEVC). SCC is mainly developed for reducing the bit-rate of videos generated from computers. However, under inter configuration, SCC has large complexity which brings heavy burden to encoding. This paper proposes a content classification based reference frame reduction method and a non-square...
In this paper, a detailed geometry analysis of the rotor structure is presented, for both synchronous reluctance and PM-assisted reluctance motor, in order to suggest an automatic procedure to draw the rotor structure. The shape of flux barriers is selected to achieve both high d-axis inductance and low q-axis inductance, in order to obtain high output torque. Methods to properly design the geometry...
In this paper, the economic analysis of a regional coordinated Microgrids system (RCMS) considering the allocation model of plug-in electric vehicles (PEVs) is proposed. Such a system is made up of a Residential Microgrid (RMG) and an Industrial Microgrid (IMG), and the two microgrids are already configured with optimized wind turbines and photovoltaic arrays. In this model, the PEVs are served as...
Surface soil moisture (SSM) is a significant variable in various fields of science. This paper aims to analyze and improve a SSM retrieval model to apply it to estimate SSM at the regional scale. Firstly, the model parameters were been analyzed. The rotation angle was transformed into exponential form and the ellipse center horizontal coordinate was decreased for the improved SSM retrieval model....
An ultra-wideband 45° phase shifter is presented in this letter. The phase shifter is designed using a multi-section broadside coupling structure that yields ultra-wideband bandpass response and constant phase shift. The measured reflection coefficient, insertion loss and phase variation are −12.5 dB, 0.67 dB, ±1.6° for the band from 2.85 to 10.70 GHz (112%), and −12.5 dB, 1 dB, ±5° for the band from...
Risk analysis and evaluation is the key problem in risk management, the outcome of assessment directly affects business policy and enterprises development. This article mainly studies qualitative issues in quantitative analysis on risk problems among present agricultural products processing enterprises by applying a simple and flexible decision-making method, the fuzzy analytic hierarchy process method,...
In this paper, a spoke-type IPM motor (buried with circumferentially magnetized magnets) with fractional-slot concentrated windings is designed to block the two-pole sub-harmonic and, thus, reduce the iron core losses and torque ripple. This is demonstrated by the comparison of a conventional V-type IPM configuration and a designed spoke-type machine. Both of them have 12-slot/10-pole configurations...
In view of the fact that there are difficulties for traditional current-controlled grid-connected inverter in power decoupling and voltage regulation at point of common coupling (PCC). Voltage-controlled grid-connected inverter can cope with these issues by completing the control strategy of voltagecontrolled inverter. Based on theoretical analysis and experimental results, this paper proposed two...
This paper mainly studies the effect of the winding layer number on the performance of IPM synchronous machines equipped with fractional-slot concentrated windings (FSCW) for electric vehicle (EV) applications. In order to quantitatively evaluate FSCW-IPM machines with different numbers of winding layers, three models with single-, double- and four-layer winding configurations will be built, comparing...
This article considers the finite-time stabilization problem for the "3 inputs, 2 chains, 1 generator" extented nonholonomic chained form system. By using the sep-by-sep design method and the finite-time stability theory, a multi-step stabilizer is proposed o make he corresponding closed-loop system is globally sable in a settled time. Finally, the simulation example show he correctness...
This paper presents a low-power 16-channel neurostimulator that consists of a MSP430-compatible controller and a 16-channel stimulation stage, which was fabricated in chartered 0.35µm EEPROM technology, occupying 2.8mm*2.5mm of chip area. The power consumption of the MCU is at most 33.6% lower than the commercial MSP430 controller in normal operation mode. The 16-channel stimulation stage delivers...
This paper presents a wireless power and data frontend dedicated to implantable applications. It includes a high-efficiency full-wave rectifier with overvoltage protection, a low-power ASK-PPM demodulator and a load shift keying (LSK) modulation circuit. Designed in XFAB 0.6µm HV process, the layout area is 0.3mm*0.4mm. To improve the power conversion efficiency (PCE) of the rectifier, a pair of comparators...
Compared with [1], further results of semiglobal practical stabilization for a class of uncertain nonholonomic mobile robots with input saturation is considered in this paper. Based on a new switching control design strategy, the saturated stabilized controller is presented in the presence of parametric uncertainties and angle measurement disturbance. Under the proposed controller, it is rigorously...
This paper designs a high voltage DC power supply with wide-range output voltage up to 35kV for electrostatic applications. The proposed system is composed of a boost power factor correction converter for improving input power factor, a voltage source full bridge inverter with series parallel resonant control, a high voltage high frequency transformer with special design to decrease the power loss,...
In this paper, a kind of photovoltaic (PV) mathematical model is proposed just using the parameters based on the standard test condition (STC). The proposed model achieves quite accuracy by improving the linear interpolation model without the iterative algorithm. In order to prove above results, detailed analyses were introduced, and a PV error correction model based on KD235GH was built. Simulation...
This paper discusses the current distortion of the single phase photovoltaic (PV) system with an isolated transformer. Many methods are proposed with respect to their capabilities to limit the voltage rise within a balanced low voltage system with a high level of PV penetration. Due to reactive power flow and excitation impedance characteristics of the transformer, the current distortion of the grid-connected...
Relative risk plays an important role in identifying and assessing diseases in the case-control association study, but the homogeneity and heterogeneity of the RR is often ignored in M stratum 2*2 tables and cohort (2*k tables) studies. This paper proposes a hypothesis test for homogeneity and heterogeneity of the RR based on the M-H methods.
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