| 1. | This thesis studied on the 3 - phase high power factor reversible rectifier
本文对三相高功率因数可逆整流电路进行了分析和研究。 |
| 2. | Chapter two expatiate mainly the function principle of the ups with constant current as the electric power is available , interpreting how the ups can realize high power factor
第二章主要阐述了恒流ups在市电供电时的工作原理，解释了其能实现电网侧高功率因数的原因。 |
| 3. | Active pfc techniques have been researched systematically and used widely in the recent twenty years because of high power factor ( pf ) and low total harmonic distortion ( thd )
有源pfc技术具有功率因数高和总谐波含量小等优点,在过去的二十年里,得到了长足的发展和广泛应用。 |
| 4. | In this paper , in order to solve the problem from the traditional rectifiers , a set of high power factor reversible rectifier scheme is designed
Pwm整流器的出现为解决传统整流器的这些问题提供了新的途径。针对目前单相整流桥这些缺点,本文设计了一套高功率因数可逆整流器方案。 |
| 5. | The importance of the high power factor has been recognized by residential and office equipment manufacturers for their own benefit to maximize the power available from a wall outlet
居民和办公设备制造商都已经认识到提高功率因数的重要性。他们都可以通过提高功率因数而获得最大的电能并从中获益。 |
| 6. | The prototype for single - stage ac / dc converter with uninterruptible power supply and high power factor is designed and manufactured . the test results are given and corresponding to the theoretical analysis
设计并研制了单级不间断高功率因数ac dc变换器原理试验装置，给出了它的试验结果，试验结果和理论分析一致。 |
| 7. | The pulse - width modulated ( pwm ) is the key technologyto acquire the high power factor . the document presents the principle of three - phase pwm , then analyzes and compares the several maturely control methods for pwm
本文将交流电机理论中空间坐标系旋转变换理论引入到pwm整流器的分析中来，建立了三相pwm整流器的统一的数学模型。 |
| 8. | Two circuits , characterized by high power factor and low output voltage , are proposed . one is originated from the concept of charge pump , and the other functions in the same principle with so - called buck - boost circuits
最后提出了两种功率因数校正的电路拓扑：一种是由电荷泵原理引出的；另一种是基于buck - boost原理工作的电路。 |
| 9. | Our products has many good features such as high efficiency , energy saving , high power factor , low starting voltage and temperature , no voice and no frequency tlicking , prolong the tube s life etc
江苏伯乐达集团年产电子镇流器200万只，企业通过iso9001认证，产品取得中国3c认证，欧洲ce gs认证。产品具有高效节能启辉电压低启辉温度低无噪音无频闪等特点。 |
| 10. | This paper introduced the basic theory of digital ballast , and presented the design of power factor regulating circuit and start - up circuit . both the circuits will bring about higher power factor and lower cost of production
系统地介绍了电子镇流器的工作原理，设计了功率因数调整电路、启动电路，既提高了功率因数，又降低了生产成本，满足了中等电子镇流器的要求。 |
