相关实验视频

Updated: Jul 12, 2025

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

Published on: October 14, 2017

基于SiC/Si混合开关的三相四线逆变器中性点电压的超扭转滑动模式控制

Yong-Sheng Fu¹, Hai-Peng Ren²

¹Xi'an Technological University, No.2 Xuefuzhong Road, Xi'an 710021, Shaanxi Province, China.

ISA transactions

|October 31, 2023

概括

本研究介绍了SiC/Si混合开关和三相四线电压源逆变器 (3P4W VSI) 的新控制策略. 这一创新通过减少开关损失和改善直流总线电压利用来提高功率密度.

科学领域:

电力电子电力电子电力电子
电气工程电气工程
控制系统控制系统

背景情况:

三相四线电压源逆变器 (3P4W VSIs) 对于不间断电源和车载充电器等应用至关重要.
对功率密度的需求增加需要更高的开关频率和减少VSI的开关损失.
现有的控制方法在管理自然点电压控制系统中的非线性和变异引用方面面临挑战.

研究的目的:

提出一种双重的方法来提高3P4W VSI性能,解决对功率密度,开关频率和损失减少的相互矛盾的需求.
首次引入SiC/Si混合开关 (HyS) 和用于3P4WVSI的新型门触发器.
实施超扭转滑动模式控制 (ST-SMC) 进行自然点电压控制,以提高直流总线电压利用率并减少开关损失.

主要方法:

在3P4W VSI中集成SiC/Si混合开关 (HyS) 与先进的门触发技术.
控制自然点电压,以追踪三倍基本频率的正弦参考.
应用超扭转滑动模式控制 (ST-SMC) 来解决非线性并实现自然点电压控制的精确跟踪.

主要成果:

展示SiC/Si混合开关和ST-SMC作为3P4WVSI的新方法.
通过拟议的控制策略,验证了改进的直流总线电压利用和减少开关损失.
使用5千瓦原型的实验验证,与现有方法相比,显示出优越的性能.

结论:

拟议的方法结合了HyS和ST-SMC,有效地解决了对高功率密度3P4WVSI的相互矛盾要求.
ST-SMC为自然点电压控制提供了强大而快速的动态响应,性能优于传统的PI控制器.
该研究证实了综合方法的有效性和优越性,通过模拟和实验验证.

关键词:

这是一个SiC/Si混合开关.超扭转的滑动模式控制器切换损失切换损失切换损失三相四线逆变器三相四线逆变器

更多相关视频

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Published on: August 15, 2014

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator

Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator

Published on: February 14, 2025

相关概念视频

Generation of Three-Phase Voltage

Generation of Three-Phase Voltage

A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...

Three-Phase Short Circuit—Unloaded Synchronous Machine

Three-Phase Short Circuit—Unloaded Synchronous Machine

Conducting a three-phase short circuit test on an unloaded synchronous machine helps understand its impact on the system. The AC fault current's oscillogram, with the DC offset removed, reveals that the waveform amplitude decreases from an initially high value to a steady-state level for one phase of the machine.
This behavior occurs due to the magnetic flux produced by the short-circuit armature currents. Initially, these currents follow high-reluctance paths but eventually shift to...

Generator Voltage Control

Generator Voltage Control

Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand,...

Three-Phase Voltages

Three-Phase Voltages

A three-phase generator produces three voltages that are equal in magnitude but have a phase difference of 120 degrees. This identical magnitude and equal phase separated voltages are known as the balanced voltages and help to minimize power loss while ensuring a steady delivery of energy to connected loads. As voltage sources in a three-phase system can be configured in a wye or a delta formation, the loads connected to these systems can also be arranged in either configuration. This...

Control of Power Flow

Control of Power Flow

There are several methods to control power flow in power systems:

Three-Phase Circuits

Three-Phase Circuits

AC power distribution systems have three categories: single-phase, two-phase, and three-phase systems. The single-phase circuit, common in residential settings, typically employs a two-wire system connecting a single AC source to various loads. These circuits support standard household appliances operating at 120 volts (V) and 240 V, such as lamps, televisions, and microwaves. The first generators, Niagara Falls hydro plant installed in 1895, were two-phase and designed by Nikola Tesla. The...