PURPOSE:To reduce a reactive current and improve the efficiency of an apparatus, by constituting a pulse-width modulation function and positive and negative feedback drive circuit from one transistor and a small number of parts. CONSTITUTION:DC power E is applied to a transistor(Tr)Q1 via ...
1概述 此演示展示了一个由自定义PWM方案控制的理想MOSFET逆变器。开关策略创建Vdc或−Vdc的双极输出电压,并使用C-Script块作为状态机实现。 图1:带C字PWM调制器的逆变器 2 Model 2.1电源电路(Power circuit) 一个理想化的全桥单相MOSFET逆变器被调制以产生一个400 VDC的方波从一个400直流电压源产生一个400直流...
This invention relates to a pulse width modulated inverter circuit having an output signal with reduced harmonic content. The inverter circuit includes a first circuit that provides a filtered fundamental pulse width modulated signal. A second circuit is electrically coupled to the first circuit to rec...
1概述 此演示展示了一个闭环控制的三相电压源逆变器,带有直流链路预充电。 图1:反馈控制的三相并网晶闸管(SCR)整流器 2 Model 2.1 Power circuit 具有线路电感的刚性三相电压源连接到二电平IGBT转换器的交流侧。该模型扩展了“电压源逆变器”演示模型,包括连接到三相电源的预充电电阻器。这些电阻器用于在DC链路电容...
Switching losses in current source inverters (CSIs) can be substantially reduced by means of an energy recovery circuit, a resonant DC link, or a DC bus commutation circuit. This paper proposes a CSI with an auxiliary circuit connected across the DC link inductor, whose purpose is to place ...
The three-phase PWM inverter is the main part of the wind power grid system,inverter control strategy of the development of high performance has become the focus of research.The phase and amplitude control circuit of inverter and voltage single loop structure,response speed is slow,and network si...
The proposed PWM scheme not only takes advantage of the special properties available in NPC inverters, but also reduces the switching loss of the inverter along with an inherent neutral point (NP) voltage control. Based on a circuit-level decoupling concept, the NPC inverter can be decoupled ...
Conduction and switching losses are reduced due to implementation of the simple active snubber circuit, that provides ZVS conditions for all switches, including the auxiliary one. Its main features are: Simple control strategy, robustness, lower weight and volume, lower harmonic distortion of the ...
The controller includes the necessary functionality to control the duty cycle of the generated PWM signal so as to produce a full wave sine wave at the output of the output bridge circuit. D Korcharz,A Ferentz - US 被引量: 151发表: 2000年 DC-AC Inverter with 3-Level PWM This project ...
The power electronic converter is based on the topology of a Pulse Width Modulated Current Source Inverter (PWM-CSI). The inverter is operated at a high switching frequency (kHZ), so that waveforms with a low distortion are generated, while the power factor is near unity. Two modulations are...