查询词典 wave power

In the design of the power supply, the main circuit topology frame uses half-bridge series resonant switching and parallel load connection, in which, an IGBT is adopted as the power switches, and features high operation frequency, high output power and fast response. In addition, the IGBT in the switch mode power supply has no hard turn-on or turn –off situation in transition, thus the disturbance to the power system is avoided.

相应的激光电源采用半桥软开关技术，串联谐振并联输出，IGBT 为主控制元件，实现了高频工作、高功率多路输出，响应快速；脉冲模式工作时避免了开关管的硬开关，减小了高次谐波对电网的干扰；无需镇流电阻也可实现气体稳定放电等特性。

In the design of the power supply, the main circuit topology frame uses full-bridge series resonant switching and parallel load connection, in which, four MOSFETs are adopted as the power switches, and by four pulses which UC3879 produces, high frequency operation and fast response are realized. In addition, the MOSFET in the switching power supply has no hard turn-on or turn-off situation in transition, thus the disturbance to the power system is avoided. Especially,by the use of high frequency transformer, PQ50/50, the switching power system can provide the steady discharge current without any amperite.

此开关电源采用全桥软开关技术、串联谐振并联输出，四个MOSFET管为主控制开关元件，通过脉冲产生电路UC3879产生的四路相关脉冲实现了高频交替开关，同时能快速响应输出的各种变化；避免了开关管的硬开关，提高了转换效率，另外通过采用高频变压器PQ50/50隔离了原副边，减小了高次谐波对电网干扰；无需镇流电阻也可实现气体稳定放电。

The instantaneous power theory was employed to analyze the instantaneous power of the control winding and the control scheme for the DWIG system with diode bridge load was obtained. The component of the currents on the control-winding flux determines the instantaneous reactive power, and the component on the perpendicular direction of the flux decides the reactive power. The former one influences the DC voltage of the diode bridge on power winding and the latter one influences the DC voltage of the static excitation controller of control windings.

基于瞬时功率理论，推导出按控制绕组磁场定向时控制绕组的瞬时功率，在此基础上分析了带整流桥负载的定子双绕组感应电机发电系统在宽转速运行时的电压调节机理，即：控制绕组电流在控制绕组磁场及其法线上的分量，分别决定着发电系统功率绕组整流桥直流侧电压和控制绕组静止励磁控制器(static excitation controller，SEC)直流侧电压，据此提出宽转速运行时DWIG发电系统电压控制策略。

After the intermediate stage in the Medieval Europe, the deed theories of Hebrew culture was not only enormously promoted the economic development , with contracting freedom inherited from the ancient Rome culture, Moreover, it had expedited the people sovereignty theories. After the combination of the neoteric commodity economy with the theories of Christianity\'s original sin, belief doctrine, and the wealth view, which gave birth to the supreme status of constitution, and the conception of equality, freedom, and so on. Christianity\'s wealth view (especially the Protestantism ethics) enormously promoted the capitalism expansion and finally forms the conception that private property are sacrosanctity. The ideology of successive authority restriction from Christianity, and the Christianity\'s exercise to partial legislative power and jurisdiction power, combined with autonomous cities based on commodity economy, and the political phenomenon that merchants exerted legislative power and jurisdiction power. Those had made the mundane ruler such as king, and so on, could only take the exertion of tax revenue power as the main symbol administrative authorities. It provided historical and psychological foundation for the birth of modern decentralization theories .

希伯来文化中的"约"和古罗马的契约自由不仅极大地促进中世纪中期以后欧洲商品经济的发展，而且催生了人民主权理念；基督教的"原罪说"、信仰主义和财富观等与近代商品经济的结合，生成了宪法至上及平等、自由等权利观念；基督教的财富观极大地促进了资本主义扩大再生产的实现并最终形成私有财产神圣不可侵犯的财产权观念；基督教会传承的权力制约思想及基督教会对部分立法权和司法权的行使，与建立在商品经济基础上的自治城市及商人行使立法权、司法权等政治现象相耦合，使得国王等世俗的统治者习惯于只行使以税收权为主要标志的行政权，为近代分权学说的产生和分权制度的建立提供了历史和心理的基础。

After the intermediate stage in the Medieval Europe, the deed theories of Hebrew culture was not only enormously promoted the economic development , with contracting freedom inherited from the ancient Rome culture, Moreover, it had expedited the people sovereignty theories. After the combination of the neoteric commodity economy with the theories of Christianity"s original sin, belief doctrine, and the wealth view, which gave birth to the supreme status of constitution, and the conception of equality, freedom, and so on. Christianity"s wealth view (especially the Protestantism ethics) enormously promoted the capitalism expansion and finally forms the conception that private property are sacrosanctity. The ideology of successive authority restriction from Christianity, and the Christianitys exercise to partial legislative power and jurisdiction power, combined with autonomous cities based on commodity economy, and the political phenomenon that merchants exerted legislative power and jurisdiction power. Those had made the mundane ruler such as king, and so on, could only take the exertion of tax revenue power as the main symbol administrative authorities. It provided historical and psychological foundation for the birth of modern decentralization theories .

希伯来文化中的"约"和古罗马的契约自由不仅极大地促进中世纪中期以后欧洲商品经济的发展，而且催生了人民主权理念；基督教的"原罪说"、信仰主义和财富观等与近代商品经济的结合，生成了宪法至上及平等、自由等权利观念；基督教的财富观极大地促进了资本主义扩大再生产的实现并最终形成私有财产神圣不可侵犯的财产权观念；基督教会传承的权力制约思想及基督教会对部分立法权和司法权的行使，与建立在商品经济基础上的自治城市及商人行使立法权、司法权等政治现象相耦合，使得国王等世俗的统治者习惯于只行使以税收权为主要标志的行政权，为近代分权学说的产生和分权制度的建立提供了历史和心理的基础。

Aiming at this problem, the concept of the second order power spectrum was proposed based on the characteristic of the amplitude tune with periodical notch spectrum in thin layer and theoretically researched. The corresponding relationship between the thickness of thin layers and the maximum value of second order power spectrum was established. The theoretical criteria and method for the thickness estimation by second order power spectrum were given. The second order power spectrum map is made by the energy relationship between the thickness of thin layers and the second order power spectrum, and the time responding to strong energy on the map is the time of thin layer.

为此，从薄层振幅调谐具有周期性陷频谱特征出发，提出了二阶功率谱的概念，从理论上对薄层的二阶功率谱特征进行了研究，建立了薄层厚度与二阶功率谱极大值之间的对应关系，给出了利用二阶功率谱进行薄层厚度预测的理论依据和方法，即根据薄层厚度和二阶功率谱的能量关系制作二阶功率谱图，图上强能量团对应的时间即为薄层时间厚度。

according to the users′ actually demand for uninterruptible power supply for loads,the internal structure of digital generator is analysed and the reason for its uninterruptible function can′t be achieved.a design of the uninterrupted power supply system which transformed from the digital generator is proposed.the system uses the inverter of generators,ac through inverter for loads,at the same time,charges the battery as ac is normal.inverter the battery dc converters to ac for load,meanwhile,starting generator,when power failure.the system applies uninterruptible power for load,whether the ac is normal or abnormal,and design voltage and frequency stabilization,output zero-interrupted,battery charging and discharging management.without requiring purchase an uninterruptible power supply separately,this design can avoid duplication of investment and wasting of resources.

快速安全提高汽轮发电机转子检修质量。。。摘要：针对用户对负载供电不间断的实际需求，分析了数码发电机的内部结构及其不能实现供电的不间断性能的原因，提出一种由数码发电机改造组成的交流不间断供电系统的设计方法。该设计利用发电机内部的逆变器，在市电正常时，由市电经过逆变器给负载供电，同时给蓄电池充电；在市电断电时，一边启动发电机，一边由蓄电池的直流电通过逆变器转换成交流电供负载使用，实现无论市电正常还是异常，系统对负载提供不间断电源。设计对市电进行稳压、稳频、输出零切换、蓄电池的充放电管理等新功能。此设计无需单独购买不间断电源，避免重复投资和资源浪费。

The article introduces two patterns of electric power reform:one is the transformation of a traditional planned economy state electric power industry into a market economy electric power industry;The other is the transformation of a market economy state-run monopolized electric power industry into competitive electric power industry.

摘要介绍了两种类型的电力改革：一种是由传统的计划经济国家的电力工业改造为市场经济的电力工业；另一种是由市场经济国家垄断经营的电力工业改造为竞争性的电力工业。

Buck and Boost topology switching power conversion circuits as the core of this system, ultra low power MSP430F1222 microcontroller-based controller, microcontroller produced by the PWM pulse width modulation signals, respectively, two-way control switch voltage conversion circuit the turn-on and turn-off in order to achieve the above two kinds of topology switching power conversion circuit, and then to draw power from the flow of electrical energy has been filled into the rechargeable battery, and using microcontroller A / D input voltage implementation of the monitoring, according to the input voltage switching buck - circuit at a lower cost to achieve a highly efficient energy transfer, and the circuit is simple, the parameter to determine easy, self-low power consumption,to achieve full-featured.

本系统以Buck降压和Boost升压拓扑结构开关电源变换电路为核心，以超低功耗单片机MSP430F1222为主控器，由单片机产生PWM脉宽调制信号，分别控制两路电压变换电路中开关管的导通与关断从而实现以上两种拓扑结构开关电源变换电路，进而从一直流电源中吸取电能充入可充电电池，并利用单片机A/D对输入电压实施监测，根据输入电压切换升降压电路，以较低的成本实现了高效率的电能转移，并且电路简单、参数确定容易，自身功耗低，实现功能完整。

The purpose: AC filter capacitor complete unit is connected into the power system of power frequency to filter harmful harmonic current out in power system and improve the quality of power, increase power factor.

产品用途：交流滤波电容器成套装置接于工频电力系统中，有以滤除电力系统中有害的谐波电流，改善电能质量提高功率因数。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"