But business lobbies, especially whiskey rectifiers and proprietary drug manufacturers, despite all the power of Wiley's coalition, kept the pure food bill from becoming law.
但是食品企业的说客们，特别是威士忌蒸馏设备商和拥有专利的药品制造商，不顾威利联盟的所有力量，阻碍纯净食品法案成为法律。
One of the key factors of affecting power factor of rectifiers is control technique.
控制技术是影响整流器功率因数的关键因素之一。
This article briefly explained the basic principles of rectifiers and its control program in high power factor and power filter technology and its control program.
简略讲解了整流器基本原理及其高功率因数的控制方法和电力滤波技术及其控制方案。
The article introduces the direct power control (DPC) principle and constitution for three-phase boost - type PWM rectifiers and analyses switching table.
介绍了三相电压型PWM整流器直接功率控制(DPC)系统的组成与原理，分析了开关表的形成机理。
The main circuit of power supply is made up of pulsed generators with flywheel, rectifier transformers, thyristor converters, diode rectifiers and switches.
电源主回路主要由飞轮脉冲发电机、整流变压器、晶闸管变流设备、硅整流器、开关网络等组成。
The modified bridge rectifiers are connected by series or parallel, to compose the double converter, that can be used to high power rectifying load.
将改进型桥式整流器串接或并接构成双重化变流电路，可用于大功率整流负载。
At present, in the field of power electronics applications, most of the drive systems of AC motors use diode rectifiers and phase-control thyristor rectifiers.
目前电力电子应用领域中，绝大多数的交流电动机驱动逆变器前级都采用了二极管整流器或晶闸管相控整流器。
But this useful technology needs high power factor, low harmonics pollution rectifiers and inverters to be its energy converters.
而分布式发电技术需要功率因数高，谐波污染少的大功率整流逆变系统作为其能量转换装置。
PWM rectifiers have the characteristics of large power factor, bidirectional power flow and constant direct voltage.
PWM整流器具有功率因数高、能量可双向流动、直流电压恒定等优点。
PWM rectifiers have the characteristics of large power factor, bidirectional power flow and constant direct voltage.
PWM整流器具有功率因数高、能量可双向流动、直流电压恒定等优点。
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