查询词典 power supply

In this paper, waveform-computing arithmetic is used to measure power factor, and a module to measure power factor is designed according to the definition of apparent power of IEEE standard 1459-2000, and the module is used successfully to measure power factor of three-phase power supply.

文中利用波形计算法，根据IEEE 1459-2000视在功率定义设计了功率因数测量模块，并成功的应用于三相电源的功率因数测量。

Through many years' development and construction, the infrastructure of QFTZ has already reached the domestic first-class level, such as power supply, telecommunication, water purveyance, water draining, sewage draining, heat supply and vapor supply; the complete infrastructure and commercial environment has formed; QFTZ is the first which has passed both ISO9001 and ISO14001. Being the first "Non-charge Zone","Garden-like Invest Model Zone" and the pilot area of "the Integration of the Port and the Zone", QFTZ has become the forerunner of opening up to the outside world, the experimental area of system innovation, the demonstration area of scientific and technical innovation, the radiation driving area of flow economy of Shandong.

经过多年的开发建设，青岛保税区基础开发已基本完成，区域功能培育取得明显突破，供电、通讯、供排水、供热、供汽等基础硬件设施均已达到国内一流水平，形成了完备的基础设施和商务环境，率先通过ISO9001质量管理体系和ISO14001环境管理体系双认证，建成了山东省第一个投资"无费区"和花园式投资示范区，"区港联动"试点区域之一，成为山东省对外开放的先行区、体制创新的实验区、科技创新的示范区、流量经济的辐射带动区。

to overcome some disadvantages of low precision,slow dynamic response,unconvenience parameter adjust existing in high-power ultrasonic power supply,it applies intelligent control composed of 8089 microcontroller is proposed.the article introduces the modulation principle of spwm,the composition of high-power ultrasonic power system applying the single chip computer to realize the soft of phase lock loop,the mechanism of work and the software thought.it realizes the low loss,high power factor and the whole performance of the circuit is developed.

摘 要：针对目前大功率超声波电源采用模拟控制电路存在精度低、动态响应慢、参数整定不方便等缺点，采用单片机8089组成智能控制的超声波电源系统。提出了基于spwm技术的双闭环控制策略和应用单片机实现软锁相的工作原理和软件思想，使整个超声波电源实现了低损耗、高功率因数，优化了电路的整体性能。

to overcome some disadvantages of low precision,slow dynamic response,unconvenience parameter adjust existing in high-power ultrasonic power supply,it applies intelligent control composed of 8089 microcontroller is proposed.the article introduces the modulation principle of spwm,the composition of high-power ultrasonic power system applying the single chip computer to realize the soft of phase lock loop,the mechanism of work and the software thought.it realizes the low loss,high power factor and the whole performance of the circuit is developed.

寂寞网民何时&回家吃饭&？基于单片机8089的超声波电源控制技术的研究。裴玖玲屈百达□摘要：针对目前大功率超声波电源采用模拟控制电路存在精度低、动态响应慢、参数整定不方便等缺点，采用单片机8089组成智能控制的超声波电源系统。提出了基于spwm技术的双闭环控制策略和应用单片机实现软锁相的工作原理和软件思想，使整个超声波电源实现了低损耗、高功率因数，优化了电路的整体性能。

With multiple functions of digging, grabbing, drilling, bull-dozing, ditch-cleaning and rock-breaking, this excavator can be widely used in various construction projects such as water supply, power supply, gas supply, telecommunication network, farmland and garden works etc.

该机采用伺服先导操纵，操作舒适；平台可360o回转，具有挖、抓、清沟和破碎等功能，可广泛用于公路、建筑、市政、供水、供气、供电、农田建设等土方工程。

The development of coal mine production mechanization increasingly requires power supply of the low-tension network in mine to keep higher and higher continuity , security and reliability , also puts forword high demand to the measurement and protection of the power supply device feedback switch .

随着矿井生产机械化水平日益提高，对矿井低压电网的供电连续性，安全性及可靠性要求越来越高，也对供电设备馈电开关检测与保护提出高的要求。

In order to reduce the production process mill system power supply system of the impact of power quality,improve the stability of equipment to meet national standards and power quality of the electricity sector of the target requirements,in the rolling mill factory production lines to install a set of 30kv side bus SVC.It restrained the molestations of power plants lines,make important roles of improve power quality,improve power factor,and level off the run level of electric web.

为了减轻轧机系统生产过程中非线性冲击负荷对供电系统电能质量的影响，提高设备运行的稳定性，满足国家标准和电力部门对电能质量指标的要求，在生产线30kV母线侧，装设了一套静止无功补偿装置，结果是把生产线对供电系统电能质量的干扰抑制到一个较低水平，对改善供电系统的电能质量，提高功率因数，稳定电网运行水平起到了极其重要的作用。

The main products have Analog Oscilloscopes, DC power supply, variable frequency power supply, electronic load.

主要产品有模拟示波器、直流电源、变频电源、电子负载。

Fire power and water supply system to load two, its dual power supply design.

消防动力和供水系统为二级负荷，对其进行了双电源供电设计。

Design changes can then be reduced to strengthen the production capability as well as further enhance product quality. The research is focused on the products of DC Power Supply. We first establish the relationship matrices among Functional Requirements, Design Parameters and Process Variables by applying the concept of product domain mapping. Secondly, we study the PFMEA of power supply and use these matrices in reverse to systematically obtain the related values between failure modes and PVs, DPs, or FRs.

本研究以直流电源供应器系列为研究对象，希望藉由系统化与量化的方式，从PFMEA失效因素的资讯，运用公理设计的观念，来探讨攸关品质要求在产品设计上的因子；首先我们应用产品领域间对应的观念建立功能需求、设计参数与制程变数之间关联矩阵，其次，研究电源供应器的PFMEA，并反向运用上述关联矩阵来系统化得到失效模式与功能需求、设计参数或是制程变数间的关联值。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。