The objective is to develop a fault diagnose scheme for MOSFET’s open switch faults for PWM voltage source inverter (PWM-VSI) motor drives. Here system monitors line to line voltage as well as switching signals nevertheless the triggering time of MOSFET, under both healthy and faulty conditions. So the measurement of line to line voltage is taken which gives the information about switching stat...

In this paper, a generalized discontinuous pulsewidth modulation (GDPWM) method with superior high modulation operating range performance characteristics is developed. An algorithm which employs the conventional space-vector PWM method in the low modulation range, and the GDPWM method in the high modulation range, is established. As a result, the current waveform quality, switching losses, volt...

Introduction Using MRI and a contrast agent (CA), one can assess numerous characteristics of the microvasculaure: Blood Volume fraction (BVf), Vessel Size Index (VSI), or local SO2 (lSO2) [1] [2]. These MRI methods rely on infinite cylinders to model the vessels that contain the CA. In the vessel, one assumes that the CA is homogeneously distributed [3]. The contribution of red blood cells is a...

Background: MRI microvasculature imaging is a powerful tool for characterizing hemodynamic properties in vivo. Different approaches have been proposed for measuring vascular properties such as cerebral blood volume fraction (CBV), vessel size index (VSI), vessel density as well as vessel architecture, though all have used analytical expressions for modeling the imprint of the vasculature on the...

PDF HTML阅读 XML下载 导出引用 引用提醒 2000-2021年青藏高原生长季植被敏感性的时空变异 DOI: 10.5846/stxb202210132905 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 海南大学科研启动基金项目（KYQD（ZR）-22084）；海南省重点研发计划项目（ZDYF2022SHFZ042）；第二次青藏高原综合科学考察项目（2019QZKK0405）；海南省自然科学基金资助（623RC447） Spatio-temporal variability of vegetation sensitivity on the Qinghai-Tibet Plateau during growing season from 2000 to 2021 Author: Affiliation: Fund Project: 摘要 | 图/表 ...

Safe operation of electric motor drives is of prime research interest in various industrial applications. This paper presents a new fault diagnosis system for open circuit switch faults in three phases Voltage Source Inverter (VSI) drive of the permanent magnet Brushless DC (BLDC) motors. The proposed fault diagnosis system is capable of detecting as well as identifying the faulty switch in the...

This paper proposes a hybrid transformerless photovoltaic (PV) converter with simultaneous AC and DC outputs. It is specifically suitable for residential PV systems due to its high efficiency, versatility flexibility, while maintaining lower leakage currents. The proposed configured by replacing the control switch of boost voltage-source inverter (VSI), enabling multiple In addition, symmetrica...

ABSTRACT This paper analyses the dynamic performances of a VSI-DC brushless drive system suitable for an electrical vehicle propulsion. The main original part of the work is a computer simulator realized in Matlab-Simulink sofware package, based on the laboratory practical experiments. To monitorize and control the motor parameter variations and influences during the variable frequency motor dy...

In this paper, the implementation of a shunt active power filter with a small series reactor for a three-phase system is presented. The system consists of multiple non-linear loads, which are a combination of harmonic current sources and harmonic voltage sources, with significant unbalanced components. The filter consists of a three-phase current-controlled voltage source inverter (CC-VSI) with...

The paper investigates the use of dissipativity-based control for voltage-sourced inverters (VSI) utilized as reactive power and unbalance compensators, e.g., Static synchronous compensator (STATCOM). The approach relies on a frequency domain modeling of system dynamics using positive sequence and negative sequence dynamic components. Following the passivity-based procedure, a family of control...