低功率

Based on two kinds of control strategies of VSR under unbalanced grid condition,the introduction of a new VSR control strategy featuring undamped -oscillation that simplifies the controller structure and effectively improves VSR"s performance under unbalanced grid condition.· A systematic description of the state switching in trilogic PWM signal generation of three-phase CSR by using the conversion between bilogic and trilogic switching functions.· Referenced to the CSR"s trilogic PWM signal generation, an approach to achieve low-stress natural commutation of switching devices by reshuffling the vector composition sequence, resulting reduced switching loss.

在研究了两类电网不平衡时的VSR控制策略基础上，提出了一种新型的基于无阻尼振荡控制器的VSR不平衡控制策略，在简化控制结构的同时，有效地改善了电网不平衡时的VSR控制性能；·通过二、三值逻辑开关函数间的转换，系统地描述了三相CSR三值逻辑PWM信号发生中的状态切换；·结合三相CSR三值逻辑PWM信号发生规律，提出了通过调整矢量合成顺序而使功率管获得自然换相的低电压应力SVPWM控制，从而有效地降低了功率管的开关损耗。

Referenced to the CSR's trilogic PWM signal generation, an approach to achieve lowstress natural commutation of switching devices by reshuffling the vector composition sequence, resulting reduced switching loss. With the background of and well instanced by the Xinjiang Autonomous Region's Key SciTech Project"Solar Photovoltaic grid-connected inverter", the dissertation work implemented the new approach of a grid-connected PV inverter that was of single-phase VSR topology and with MPPT .

在研究了两类电网不平衡时的VSR控制策略基础上，提出了一种新型的基于无阻尼振荡控制器的VSR不平衡控制策略，在简化控制结构的同时，有效地改善了电网不平衡时的VSR控制性能；通过二、三值逻辑开关函数间的转换，系统地描述了三相CSR三值逻辑PWM信号发生中的状态切换；结合三相CSR三值逻辑PWM信号发生规律，提出了通过调整矢量合成顺序而使功率管获得自然换相的低电压应力SVPWM控制，从而有效地降低了功率管的开关损耗。

The effective channel mobility of4H-SiC MOSFETs is increased significantly by high temperature anneals in nitric oxide.4H-SiC MOSFET with hydrogen postoxidation annealing has a lower threshold voltage of3.1V and a wide gate voltage operation range in which the inversion channel mobility is more than100cm 2 /Vs.

SiC的雪崩击穿电场是Si的十倍，因此，理论上SiC单极功率器件的导通电阻可以比Si器件的低400倍，但在6H-SiCMOS结构中，由于反型层的电子迁移率较小，沟道迁移率测量值仅为40～50cm2/Vs，远远低于6H-SiC的体迁移率400cm2/Vs眼1熏2演，限制了SiC功率MOSFET的导通电阻Ron。

To reduce the complexity,a novel power allocation method is proposed by approximating the original problem.

为了降低功率分配的复杂度，通过对最优化问题的近似，提出了一种低复杂度的功率分配算法。

The effects of various optical coefficients(such as scattering and absorption coefficients, anisotropy parameter, etc.) and thermophysical properties(such as surface convective coefficient, etc.) and physiological coefficients(such as blood perfusion rate and metabolic heat generation, etc.) on the thermal behavior of the LILC method wet-c discussed in detail. The results show that the size and location of cauterized tissue under the skin can be bontrolled by properly adjusting the absorption and scattering coefficients and irradiation power and so on.

在此基础上，详细讨论了散射系数、吸收系数、各向异性系数等光学参数，激光加热功率、照射半径、表而对流换热系数等热学参数，以及血液灌注率和新陈代谢等生理参数对这种低损伤加热疗法的影响，结果发现，只要通过适当调节吸收系数、散射系数和照射功率等参数就可实现对加热区域位置和范围的控制。

Although usually applying relatively low power can avoid tissue charring, rather higher power is recommended because it is indispensable to achieve necessary damage threshold and the therapy time can be shortened.

虽然常用的相对较低的功率可以避免组织烧焦，但是推荐采用较高的功率，因为它是达到必要的损伤阈值所必需的，而且可以缩短治疗时间。

All of these power MOSFETs are designed for applications such as switching regulators, switching convertors, motor drivers, relay drivers, and drivers for high power bipolar switching transistors requiring high speed and low gate drive power.

所有这些功率MOSFET的设计，例如开关稳压器的应用，开关转换器，电机驱动器，继电器驱动器，驱动器和高功率双极晶体管的开关速度和低要求高栅极驱动力。

Electric bicycle and electric motorcycle is different, the electric bike is riding the line device, the electrical power good smaller, when the Su-not more than 15 kmh, the electric motor power the larger motorcycle 500W or greater, about 50 kmh per hour, there is no cycling device can be the road for electric bikes, electric motorcycles can not be listed on the road, and the technology was not, a low safety factor, it is recommended not to buy Electric Motorcycle.

电动自行车和电动摩托车是有区别的，电动自行车是有踏行装置的，电机功率好较小，时素不能超过15公里每小时，电动摩托车电机功率较大500W或更大，时速50公里每小时左右，没有骑行装置，电动自行车可以上路，电动摩托车现在还不能挂牌上路，而且技术不成熟，安全系数低，建议不要买电动摩托车。

For the aim of obtaining high power of red laser,a Z-shaped resonator is designed, and the cooling temperature of KTP is lowered to 7℃ to compensate the thermal effect of KTP.

为获得高功率的倍频红光设计了Z型折叠腔腔型，并将KTP的冷却温度降低到7℃的较低温度以补偿KTP的热效应，最终在抽运功率317W时获得1.8W的连续波659.5nm红光激光输出。

When the plasma power is high, with burning and oxidating a lot of powders are lost.

等离子功率低，则得不到球形钨粉，等离子体功率过高，则钨粉氧化和烧损都非常严重。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。