开关损耗

一种降低三电平逆变器开关损耗的PWM方法

PWM Method for Reduction of Switching Loss in 3-level Inverter

最小开关损耗两相调制SVPWM控制及算法研究

Control and Algorithm for Minimun Switching Loss of Two-phase Modulated SVPWM

基于空间电压矢量的最小开关损耗PWM技术

Technique of Minimum Switching Losses PWM Based on Voltage Space Vector

基于低开关损耗新型滞环PWM整流器研究

Research of New Hysteresis PWM Rectifier Based on Low Switching Losses

新颖高性能零开关损耗PWM逆变器

The New High Performance Zero-Switching Loss PWM Inverters

用空间电压矢量方法产生最小开关损耗的PWM具有计算简单、易于数字实现的特点。

The method of minimum switching losses SVPWM has characteristics of simple calculation and easy digital realization .

组合变流器降低开关损耗的SVPWM技术研究

Study on SVPWM Technique for the Switching Losses Reduction of Multi-modular Converter

PWMDC-DC变换器中开关损耗是限制进一步提高开关频率的重要因素。

Switching losses is prime factor limiting utilization of much higher switching frequency in PWM DC-DC converter .

选择了合适的逆变频率，降低IGBT模块的开关损耗。

Through choosing suitable frequency of inverter , switching losses of domestic IGBT modules are reduced .

计及开关损耗的级联型逆变器SVPWM信号随机分配方法研究

The Research on Random Distribution of SVPWM Signals Considering Switching Loss in Cascaded Inverter

为了提高这类电机的控制能力，本设计采用了开关损耗最小PWM调制。

In order to improve the control capacity of this kind motor , this article uses a minimum switching loss PWM modulation .

对于三相boost电压型变流器，大多数控制方法不能同时满足高功率因数、低开关损耗、简便实施性。

For the three-phase boost voltage source converter , most control methods cannot embrace high power factor , low switching loss and easy implementation .

具有最小开关损耗的DC-DC升压变换器

DC-DC boost converter with switching lossless

作为方法的应用，研究了三电平中点箝位式变换器开关损耗，研究的器件为主流功率器件IGBT和快恢复二极管。

The switching losses model of neutral-point-clamped three-level inverter with widely used IGBT and fast recovery diode is developed .

由混沌映射的随机性和确定性分配特点，可以得出级联型逆变器每个H桥单元处于工作状态的概率是相等的，从而达到有效地减少开关损耗，均衡开关负荷的目的。

As known from the traits of chaotic mapping , its application to cascaded inverter can decrease the switching loss effectively and balance the working probability of each H-bridge unit .

照度充足：LED照明瞬时启动，并达到额定光通量而且无开关损耗，LED发光角度可调节，满足您多种照明需要。

Adequate illumination : LED lighting instant start and achieve the rated flux and no switching losses , LED light-emitting angle can be adjusted to meet your variety of lighting needs .

为了降低有源电力滤波器的开关损耗，实现灵活补偿，对现有的PWM控制技术进行了改进。

In order to release the switching loss of three-phase active power filter and realize the flexible compensation , this paper improves traditional PWM control mode .

空间矢量调制算法生成PWM波因电压利用率高，开关损耗小，易于数字实现，在电力变换设备中应用日益广泛。

Space vector modulation PWM algorithm is widely used in power converter because of high voltage utilization , lower switching losses , easily realized in digital system .

给出了以保证电机电枢电流连续和实现开关损耗最低为目标的PWM开关频率的确定方法。

To ensure continuous current in the generator armature and minimize the switch loss in the IGBT , the determination method for the PWM frequency was given out .

由于采用了较高的斩波频率和新颖的控制策略，减小了滤波元件的尺寸，并降低了IGBT的开关损耗。

With high chopping frequency and novel control strategy , the size of filter elements is reduced and switching loss of IGBTs drops .

通过MATLAB仿真软件分别建立了两种控制系统的仿真模型并进行了仿真与分析，从而验证了两相调制控制策略在保证输入电流正弦化、母线电压稳定的同时可以有效地降低功率器件的开关损耗。

Using MATLAB simulation software , the thesis simulates and analyzes dynamic performance of control system , proving that two-phase modulation method can reduce the switching losses of the power electronic devices .

因此，针对这种情况，提出高速MOSFET驱动器应具备的几点要求以及降低MOSFET高频开关损耗的几项措施。

Therefore , under the circumstances , several requirements and measures are proposed for high-speed MOSFET driver circuit and reducing MOSFET HF loss .

然而，较高的工作频率会引起严重的电磁干扰（EMI）和开关损耗从而导致系统整体效率降低。

However , higher switching frequency may cause higher switching losses , and thus higher Electro-Magnetic Interference ( EMI ) and lower overall efficiency .

功率器件（包括IGBT和二极管）在工作时要产生损耗，包括通态和开关损耗。

When power devices are working , there is loss in them , like the state loss and switch loss , including IGBT and diode .

然而大容量的IGBT存在开关损耗大，尤其是拖尾电流在高频开关工作状态下引起的关断损耗很大，限制了其工作频率的提高。

However , the IGBT switching losses is large , especially at high-frequency switch with tail current state , which limits the frequency of IGBT .

缓冲电路通过抑制反向恢复电流所引起的di/dt和漏源极电压的dv/dt，有效地减少了开关损耗和EMI噪音。

Switching losses and EMI noises are reduced by restricting di / dt of the reverse recovery current and dv / dt of collector-emitter voltage .

实验结果说明该设计输出波形满足设计要求，达到了降低UPFC开关损耗的目的。

The results show that the output waveforms meet the design requirements and achieve the purpose of reducing UPFC switch losses .

本文首先对国内外对UPFC的现状及其控制算法进行了研究，针对目前输电系统存在的损耗大、传输率低的问题，采用开关损耗最小PWM算法进行UPFC控制系统的设计。

For the problems which the current transmission system exists , this dissertation adopts the minimum switch loss PWM algorithm to design UPFC control system .

为了减小高频下IGBT的开关损耗，文中采用了软开关技术，通过改进型ZVS-PWM控制，实现了IGBT的软关断。

To reduce the high frequency IGBT switching losses , the paper uses soft-switch technology to the soft-close by improved ZVS-PWM control .

另外，提出了一种与低开关损耗SPWM相对应的SVPWM实现方法，使开关损耗降低了33%。

A new realizing method of SVPWM corresponding to SPWM with low switching losses is advanced , Which reduces the switching loss by 33 % .