功率损耗

The subsequent reduction in core losses allows for very high electronic frequency operation and thus a high power density.

随后的磁芯损耗的减小允许很高的电频率工作，这样允许高功率密度。

To ensure the voltage quality and improve the power factor of the oilfield electric network and reduce the power lossalong the wile, in-situ wattless compensation technology is adopted on the electric motor, i.

为保证电网电压质量，提高功率因数，降低线路损耗，可对电动机实行无功就地补偿，即在电动机旁配备适当的低压小型电力电容器装置来补偿电动机的无功功率。

The author did the tracking test to four kinds of exist using energy-saving motors of sucker rod pumps,compared and analysed the tested data on the wattless losses,wattful power,single consume to output of fluid,energy-saving rate and average system efficiency of pump units.

跟踪测试了孤东油田目前在用的4种有杆抽油机节能电机，利用科学、准确的实测数据，从无功损耗、有功功率和产液量单耗、节电率、抽油机平均系统效率等方面进行了对比分析。

A phase-shifted controlling PWM DC/DC full bridge converter with softswitching is proposed and used to realize a constant current power of20A(5～48V).This full bridge converter utilizes the transformer leakageinductance(or the resonant inductance in series with transformersprimary)and the autoecious capacitance of MOSFET to achieveZVS(Zero-Voltage-Switching),as a result it can decrease the switchingwaste,increase the switching frequency,and diminish the power bulk.

本文使用一种通过移相控制进行脉宽调制的软开关全桥变换器来实现20A(5～48V)恒流源，这种全桥变换器利用变压器的漏感、原边串联谐振电感和功率管的寄生电容来实现开关管的零电压开通，降低了开关损耗，提高了开关频率，减小了电源体积。

The major research includes the following three points. First, using finite element method, the influence factors on propagation properties for PMF couplers are analyzed, including the shape of coupler cross-section, the taper of coupler bipyramidal and the angle deviation of the birefringent axes.

基于热-结构-电磁多物理场耦合有限元方法，分析了保偏光纤耦合器的传输特性和耦合系数在熔锥区的变化规律，从而求解耦合模方程，得到偏振光经过耦合器后的光功率分布，继而对保偏光纤耦合器的性能参数分光比、消光比及附加损耗进行理论分析。

Disc type coreless permanent magnetic synchronous motor, which is a new kind of permanent magnetic, has many advantages, such as little volume, low mass, low lost, high power and so on. It gradually becomes the perfect drive device.

盘式无铁心永磁同步电机是一种新型的永磁电机，其以体积小、重量轻、损耗小以及功率大等优点逐步成为当今理想的驱动装置。

Through loss mechanism investigation for a gapped inductor ,copper winding scheme and litz wire winding scheme for gapped inductor was evaluated.

对高频率和大电流的开关功率变换器，电感器损耗对温升及变换器效率指标具有重要影响。

SMPS ; power transformer ; litz copper foil winding ; winding loss

高频开关电源；功率变压器；双绞铜箔线圈；线圈损耗

Through controlling SenseFET, PWM the function compositive in small enclose inside, these power switch can save a space, the intermittent job mode with advanced at the same time have the aid of will assure low switch loss, achieve a system to bide one's time thereby power comsumption under 1 tile.

经由过程将SenseFET、PWM节制性能集成在小封装内，这些功率开关能够节省空间，同时借助前进前辈的间罢工作模式来包管低开关损耗，从而达到系统待机功耗低于1瓦。

In order to minimize reactive power transmission losses, improve the efficiency of power transmission and distribution equipment, reactive compensation equipment configuration, should be in accordance with the "classification of compensation, local balance" principle, reasonable layout

为了最大限度地减少无功功率的传输损耗，提高输配电设备的效率，无功补偿设备的配置，应按照&分级补偿，就地平衡&的原则，合理布局。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失