The motor is powered by high voltage DC supply and the current from the fuel cell system is regulated via a DC DC converter.
发动机采用高压直流电驱动，电流转换通过直流-直流转换器实现。
Experiments show that the designed DC DC convertor's output voltage precision is high, the antijamming ability is strong and the adjustable performance is fast and smooth.
实验结果表明，用这种方法所研制的电动汽车DC DC变换器输出电压精度高，抗干扰能力强，调节特性快速、平稳。
Some people, however, question that standard because over long distances high-voltage DC lines suffer lower losses than AC.
现在有人开始质疑这一标准的适用性，因为在远距离输电的情况下，采用高压直流(HVDC)要比高压交流损耗小。
Can be 0 ~ 500v voltage range ac and DC voltage measurements with high accuracy.
可以对0 ~ 500v电压范围内的交、直流电压进行较高精度的测量。
Both theoretical analysis and experimental results show that the AC DC converter has high efficiency over a wide range of input voltage.
理论分析和实验结果表明，该转换器可以在较宽的输入电压范围内获得较高的转换效率。
SVPWM technique have many good qualities, such as less pulsating torque, high usage of DC bus voltage, less switching loss, better high-speed regulation performance.
SVPWM具有较高的直流电压的利用率，开关损耗小，从而实现了高性能的逆变输出。
It has been shown that the designed DC switching mode converter has a stable output voltage frequency, small ripple, high operating frequency and low power consumption.
结果表明，所设计的直流开关型变换器集成模块输出电压稳定、纹波小、工作频率，高、功耗低，且体积小。
DC high voltage (or DC leakage current) test is an effective method of technical diagnosis of electric machine.
直流高电压(或称直流泄漏电流)试验，是一种行之有效的电机技术诊断方法。
It OS easy to adjust, its step precision is high, and can be used for a standard DC voltage source for electronic instrument.
该电源具有调整方便、步进精度高等特点，可作为电子仪器直流标准电压源。
The stability of voltage and current outputted by HV DC power is important to generate stable high-voltage electric field .
直流高压电源输出电压和电流的稳定性对产生稳定的高压复合电场极为重要。
It introduces a kind of powerful complementary DC and constant voltage power device by using the independent excitation and high frequency PWM wave clipper.
介绍一种利用它激式高频pwm斩波技术完成的大功率直流稳压电源装置。
The DC bus voltage and the power factor of the PWM rectifier are regulated by three nonlinear PI controllers with high performance.
采用双环结构，用三个非线性PI环节实现了对整流器直流电压与功率因数的高性能控制。
By digital adjustment with high precision on the DC bias of reference sine wave, the DC bias contained in inverter output voltage can be adjusted to restrain DC circulating current.
通过对逆变器基准正弦波直流分量的高精度数字调节，相应调节逆变器输出电压直流分量以抑制直流环流。
High voltage low power DC-DC converter is designed for converting low voltage DC current into high voltage one.
高电压小功率DC - DC电源变换装置，是一种利用低压直流电源产生高电压的电源装置。
An inspecting method was introduced for the DC static high voltage meter and the analysis for its uncertain-ty was given out.
文章介绍一种检定直流高压静电电压表的方法，并对其进行不确定度分析。
Features: high DC current gain, low saturation voltage, high col lector power dissipation.
特点：高直流电增益，饱和压降低，高集电极。
These converters perform from positive to positive and negative DC DC voltage increasing conversion with high power density, high efficiency and cheap topology in simple structure.
该变换器完成从正电压至正和负电压的DC- DC升压变换，功率密度和效率高，拓扑结构简单价廉。
Features: High DC current gain, excellent hFE linearity, low saturation voltage.
特点：直流电流增益高，放大线性好，饱和压降低。
A new type of infrared intelligent DC high voltage generator was introduced.
提出了一种新型的红外式的智能直流高压发生器。
We should always check the high voltage DC power supply within the current relay, time relay setting value is correct, control is sensitive.
应经常检查高压直流电源内电流继电器，时间继电器的整定值是否正确，控制是否灵敏。
The high voltage endurance test device for switch tube is composed of high voltage pulse generator, high voltage breakdown detector, trigger, auto-controller and DC/AC converter.
开关管冲击耐压装置由高压脉冲产生器、击穿检测器、触发器，及自动控制器、DC/AC变换器等构成。
Features: High DC current gain and excellent hFE linearity, low saturation voltage.
特点：直流电流增益高，放大线性好，饱和压降低。
DC system had to achieve, under-voltage protection and voltage show a combination of device integration is very high.
实现直流系统过、欠压保护及电压显示的组合，装置的集成度非常高。
The supply power of copper vapor laser (CVL) consisting of DC high voltage circuit, pulse discharge circuit and one stage magnetic pulse compression circuit is introduced here.
文中介绍了由直流高压电路、脉冲放电电路和一级脉冲磁压缩电路组成的铜蒸气激光器电源。
The power contains the DC power supply, high voltage divider and spark gap switching.
该电源包括直流电源、高压分压器、和火花间隙开关。
It can be used in fields such as insulation test of high voltage equipments, DC power transmission system, static electrical equipments.
它在高压设备电气绝缘测试、直流高压输电和静电设备上均有良好的应用前景。
It can improve the reliability and quality of the high voltage DC electrical system of airplane to adopt modular power supplies to construct a secondary distributed power system.
采用模块电源构成飞机高压直流电气系统的二次电源分布式系统，可提高供电可靠性和供电质量。
A new leakage detection system based on high voltage DC method was successfully developed through comparison among foreign methods used in landfill leakage detection.
通过比较国外多种填埋场渗漏检测方法，成功地研制了基于高压直流电法的渗漏检测系统。
The technology of high voltage DC switching power supply has been successfully developed in advanced countries, but is under development in China.
在国外高压大功率开关电源技术已较为成熟，我国对这方面的研究也一直在进行，但目前还不成熟。
The technology of high voltage DC switching power supply has been successfully developed in advanced countries, but is under development in China.
在国外高压大功率开关电源技术已较为成熟，我国对这方面的研究也一直在进行，但目前还不成熟。
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