《电力电子技术》2020年春季学期在线作业（二）

adminhan

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为了让晶闸管可控整流电感性负载电路正常工作，应在电路中接入（）。</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">三极管</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">续流二极管</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">保险丝</span>
D:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电力场效应晶体管</span>

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">下列哪种功能不是变流的功能（）。</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">有源逆变</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">交流调压</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">变压器降压</span>
D:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">直流斩波</span>

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">直流斩波电路是一种（）</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">变换电路。</span>
A:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">AC/AC</span>
B:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">DC/AC</span>
C:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">DC/DC</span>
D:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">AC/DC</span>

普通晶闸管是一种单向导电器件，它在电压阻断能力方面的特点是（   ）。
A:仅具有正向电压阻断能力
B:仅具有反向电压阻断能力
C:正、反向电压阻断能力都具备
D:接入反并联二极管时，正、反向电压阻断能力才都具备

按照器件内部电子和空穴两种载流子参与导电的情况可知分类，由电子和空穴两种载流子参与导电的器件称为（   ）。
A:单极型器件
B:双极型器件
C:复合型器件

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">单相桥式可控整流电路输出直流电压的平均值应该等于整流前交流电压的（）倍。</span>
A:<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">1</span>
B:<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">0.5</span>
C:<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">0.45</span>
D:<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">0.9</span>

在大电感负载三相全控桥中，当α=90°时，整流电路的输出是（   ）。
A:U
B:0
C:1.414U2
D:1.732U2

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">变流器工作在逆变状态时，控制角&alpha;必须在（）。</span>
A:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US"><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">0</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">&deg;</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">-90</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">&deg;</span></span>
B:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">30</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">&deg;</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">-120</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">&deg;</span>
C:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">60</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">&deg;</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">-150</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">&deg;</span>
D:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">90</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">&deg;</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">-150</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">&deg;</span>

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">下列半导体器件中属于电流型控制器件的是（）。</span>
A:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">GTR</span>
B:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">MOSFET</span>
C:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">IGBT</span>

单相半控桥，带电感性负载，晶闸管的导通角为（   ）。
A:90°
B:180°
C:120°
D:150°

对于可控整流电路，其换流重叠角大小的影响因素，主要包括（   ）。
A:变压器等效漏感LB
B:直流侧电流Id
C:A、B两个方面都有影响
D:Ud代表的平均值电压的增加量

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">单相半波可控整流电阻性负载电路中，控制角</span><span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">&alpha;</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的最大移相范围是（）。</span>
A:<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">0&ordm;-180&deg;</span>
B:<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">0&ordm;-15&deg;</span>
C:<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">0&ordm;-120&deg;</span>
D:<span style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 10.5pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">0&ordm;-90&deg;</span>

驱动电路是电力电子器件主电路与哪种电路之间的接口（   ）。
A:缓冲电路
B:保护电路
C:控制电路
D:滤波电路

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">比较而言，下列半导体器件中开关速度最快的是（）。</span>
A:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">GTO</span>
B:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">GTR</span>
C:<span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">MOSFET</span>

单相全控桥、单相半控桥、三相半波可控整流和三相全控桥整流这四种整流电路中，能实现有源逆变的电路是（   ）。
A:单相全控桥、三相全控桥
B:单相全控桥、单相半控桥和三相全控桥
C:单相全控桥、三相全控桥和三相半波可控整流
D:全部4种

三相全控桥式整流电路中同一相上、下两只晶闸管触发脉冲相位差（   ）。
A:60
B:90
C:120
D:180

三相半波可控整流电路的自然换相点是（   ）。
A:交流相电压的过零
B:本相相电压与相邻电压正半周的交点处
C:比三相不控整流电路的自然换相点超前 30°
D:比三相不控整流电路的自然换相点滞后 60°

全控器件在开关频率较高时，使器件损耗增加的主要因素是（   ）。
A:通态损耗
B:断态损耗
C:开关损耗

<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">若增大</span><span style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体" lang="EN-US">SPWM</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">逆变器的输出电压基波频率，可采用的控制方法是（）。</span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">增大三角波幅度</span>
B:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">增大三角波频率</span>
C:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">增大正弦调制波频率</span>
D:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-font-kerning: 1.0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">增大正弦调制波幅度</span>

下列那种器件属于全控器件（   ）。
A:IGBT
B:SR
C:SCR
D:双向晶闸管