变换器

One tube continually emits infrared ray,and the other receives the reflected ray.

过去常用测速机、脉冲发生器、模拟变换器等测速方法，由于易受外界因素的影响

A novel single-stage power factor correction circuit based on flyback converter is presented in this paper,.A single active switch is used to achieve a fast-regulated-output voltage, the reservoir capacitor voltage is clamped and efficiency is high.

本文提出了一种基于反激变换器的新型单相功率因数校正电路，电路只用一个有源开关就可以获得输出电压的快速调节，储能电容电压被箝位、效率高。

This paper presents a new method for OCC, which has no reset switch, and so is very simple. Small signal model is established. Theoretical analysis is verified by simulation results.

本文在分析单周控制方法基本原理的基础上，提出了无复位开关的单周控制新方法，以Buck变换器为例，建立了控制系统的小信号模型，通过理论分析和仿真结果证明了该方法的正确性。

The circuit of this device is formed the source, pressed frequently by the pulse changer, photosensitive resister and power switch three parts make up.

该装置的电路由脉冲形成源、压频变换器和光耦与功率开关三部分组成。

It is difficult Boost converter has good dynamic adjustment performance and stability if the system using a single voltage feedback loop get some interference. The reason is Boost converter has a zero point in right half plane.

Boost变换器的开环传递函数有一个位于右半平面的零点，使得使用单一的反馈电压环难以同时保证系统在受到某种扰动作用时，既有很好的动态品质又不致造成系统失稳。

Finally,the simulation results simulated in Saber and the experimental results have verified the all the characteristics above.

在文末，基于Saber下的仿真和实验结果验证了变换器几种特性。

FIG. 3 schematically illustrates an interlaced to progressive scan converter

图3示意性地示出了隔行到逐行扫描变换器

The proposed converter can realize self-drive of synchronous rectifier conveniently.

④提出的变换器能方便实现同步整流管的自驱动。

In the DC-AC inverters, however, the fundamental component of the output voltage or current is either the same as or a simple fraction of the switching frequency.

在DC-AC变换器，然而，产品电压或潮流的根本组分是同一样或开关频率的一个单分数。

This paper introduces the single-phase and three-phase matrix converter basic principle and circuit topology.

本文首先介绍了单相和三相矩阵式变换器的基本工作原理及其电路拓扑结构。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。