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1·The PWM chopper circuit and the selection of power switching elements, protecting circuits, driving units and software programming are given out.

主要内容包括PWM斩波电路结构及功率开关器件的选择，驱动电路，保护电路以及软件编程。

2·With the shift-phase modulated multiple chopper circuit, the equivalent switch frequency can be improved, so it can be used in large power occasion.

采用移相调制的多重斩波电路，可以提高等效开关频率，因此可应用在中大功率场合。

3·In this paper, using unity power factor PWM rectifier and chopper circuit, it establishes a new type of switching power supply about PWM input rectifier circuit.

文章采用单位功率因数pwm整流器和斩波电路组成开关电源主体，建立以pwm整流电路为输入电路的新型开关电源。

4·The model setting up method of the three module which include power factor correction circuit, two-transistor forward converter, secondly chopper circuit, is discussed in detail.

分别讨论了功率因数校正模块、双正激变换电路模块和二次斩波模块的建模方法。

5·A voltage type high power invert circuit which is composed of chopper and thyristor full bridge invertor is proposed.

提出了一种由斩波电路与全桥逆变电路构成的电压型大功率晶闸管全桥逆变主电路。

6·The model for general snubber circuits is presented by means of analyzing the snubber circuit of a chopper.

通过对斩波器中缓冲电路工作过程的分析，提出了一般缓冲电路的模型。

7·Selection of DC chopper main circuit, hardware and software design of special purpose microcomputer are discussed.

对直流斩波器主电路如何选择专用微型计算机硬件和软件设计进行了讨论。

8·A method of stepping motor driver circuit was given, composed by a chopper type current mode switch regulator and a monolithic stepping motor driver TA8435H.

提出采用斩波式电流型开关电源结合单片式步进电机驱动器TA8435H，构成一种电机驱动电路的方案。

9·The circuit for realizing the method includes a measured value collector (1), a DC chopper (3) and a microcontroller (2).

用于实现该方法的电路包括测量值采集器(1)、直流斩波器(3)和微控制器(2)。

10·The hardware circuit is simple, software programming is short. The satisfactory results are obtained through controlling Chopper for a DC motor.

该调制器硬件电路简单，软件编程方便，对直流电动机实行斩波控制取得了满意的效果。