直流的

This paper puts forward a novel DC link parallel resonant soft switching technology. It mainly analyses the topology, working principle of the soft switching inverter. Finally it validates its theory and feasibility through experiment.

该文提出一种新型的直流环节并联谐振软开关技术，重点分析了此种软开关逆变器的拓扑结构、工作原理和特点，并通过实验验证了其原理和可行性。

The ways of parallel resonant DC link and three-level control strategy were used in this power amplifier circuit. Output current ripple of power amplifier can be reduced as three-level power amplifier, all of power switches work on and off under the zero voltage switching or zero current switching, loss of switching and current ripple interference effectively reduced.

该电路在功率放大器三电平控制策略的基础上应用了并联谐振直流环节，保持了三电平功率放大器输出电流纹波小的优点，同时功率器件均工作在零电压或零电流条件下，开关损耗、电流纹波干扰有效地减小。

This paper presents a position control system for BLDC motor based on TMS320LF2406. It also introduces the hardware and software design solutions for this system.

介绍了一种基于TMS320LF2406的无刷直流电机位置控制系统，简述了实现该控制系统的硬件设计方案和软件控制策略。

Noise control is one of the key problems to be solved during the development of UHVDC power transmission.

换流站的噪声控制是发展特高压直流输电需要解决的关键技术之一。

With good characteristics and performance, the dc motor is widely used in the laboratory and on the precision machine tool in factory.

直流电机具有良好的工作特性与运行性能，因而广泛应用于实验室和工厂的精密机床上。

With good characteristics and performance,the dc motor is widely used in the laboratory and on the precision machine tool in factory.

摘要直流电机具有良好的工作特性与运行机能，因而广泛应用于实验室和工场的紧密机床上。

As the primary protection for high voltage direct current converters, there are two kinds of typical operational equations for valve short circuit protections.

作为高压直流输电系统中换流器的主保护，现有的阀短路保护主要有2类动作方程。

The objective of this dissertation is to study the control technology to minimize the torque pulsation of BLDCM.

本文的主要目的就是研究无刷直流电动机转矩脉动的抑制方法。

The application areas of conventional push-pull converters are limited because of high voltage stress of switches.

由于传统推挽直流变换器中开关管的电压应力高，故该变换器的应用范围受到限制。

In this thesis, synchronized sampling technology and realization of three-phase electricity quantity is discussed.

1引言交流电气参数的测量，先后出现了直流采样、霍尔原理法、模拟乘法器法等交流参数的测量方法。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。