mst-dq-B.html 15.9 KB
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            <div class="st_title">电气工程师笔试考核试题(B卷)</div>
            <p style="text-align: center"><span>总分:100</span>  <span style="padding-left: 20px">闭卷:75分钟</span></p>
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                <div class="col-lg-4 col-md-4">专业:<input id="paperType" type="text" class="tm_input" placeholder="请填写专业"  readonly></div>
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            <h2 class="tm_title">一、电气基础类(16*2=32分)</h2>
            <p style="padding-left: 25px">
                1.&nbsp;&nbsp;三相交流电是由三个电势振幅相等、<input name="answer" type="text" class="hx_input" id="" style="width: 120px">、相位差互差<input name="answer" type="text" class="hx_input" style="width: 120px">度角的交流电路组成的电力系统;
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                2.&nbsp;&nbsp;在电气设备未通电前的情况下,根据系统电气原理图或接线图,对整个电气系统中的主回路,<input name="answer" type="text" class="hx_input" style="width: 120px">回路、<input name="answer" type="text" class="hx_input" style="width: 120px">回路、<input name="answer" type="text" class="hx_input" style="width: 120px">回路等进行检查。一般使用导通法看其接线是否正确;;
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            <p style="padding-left: 25px">
                3.&nbsp;&nbsp;如果地面上水平距离约0.8米的两点之间有电位差,当人体2只脚接触该两点,则在人体上将承受电压,该电压称为<input name="answer" type="text" class="hx_input" style="width: 120px">
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                4.&nbsp;&nbsp;电气设备故障时,直观检查方法是十分重要的第一步,一般包含观察法(看)、<input name="answer" type="text" class="hx_input" style="width: 120px"><input name="answer" type="text" class="hx_input" style="width: 120px">、嗅觉法(闻)等方式进行初步故障判断;
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                5.&nbsp;&nbsp;断路器在二次设备电路中具有:短路保护、<input name="answer" type="text" class="hx_input" style="width: 120px">保护、<input name="answer" type="text" class="hx_input" style="width: 120px">保护;
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            <p style="padding-left: 25px">
                6.&nbsp;&nbsp;变频器是可调速驱动系统的一种,是应用变频驱动技术改变交流电动机工作电压的频率和幅度,来平滑控制交流电动机<input name="answer" type="text" class="hx_input" style="width: 120px"><input name="answer" type="text" class="hx_input" style="width: 120px">;
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            <p style="padding-left: 25px">
                7.&nbsp;&nbsp;常用的伺服驱动器品牌有:松下、汇川、<input name="answer" type="text" class="hx_input" style="width: 120px"><input name="answer" type="text" class="hx_input" style="width: 120px">等;伺服电机执行机构在启动或停止时,出现抖动的现象,一般这种情况应该主要调<input name="answer" type="text" class="hx_input" style="width: 120px">参数等;
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                8.&nbsp;&nbsp;隔离开关和负荷开关相似都具备通断功能,主要区别是负荷开关还具有<input name="answer" type="text" class="hx_input" style="width: 120px">功能;
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            <h2 class="tm_title">二、电气计算类(18分)</h2>
            <p style="padding-left: 25px;" class="pc_hg">
                1.已知伺服电机是分辨率12位多圈绝对值编码器,最大圈数是4096,减速比是50:1,单圈行程为10mm,试计算该伺服电机最多能走多远距离?<br/>
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            <h2 class="tm_title">三、电气绘图类(20分)</h2>
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                1.已知电机功率5.5KW,通过按钮控制电机正反转的电气原理图;(可在CAD或者EPLAN中绘制,也可手工绘制)<br/>
                1)、功能要求如下:按下电机正转按钮,电机正转,松开停止;按下电机反转按钮,电机反转,松开停止;同时按下正反转按钮,电机不动作;<br/>
                2)、绘图要求如下:需注明元器件型号和品牌,电气符号,充分考虑电气安全性,线号、线径等标注清楚;<br/>
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            <h2 class="tm_title">四、上机测试类(30分)</h2>
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                1.已知G120变频器带普通电机,带SSI反馈的扫码装置、增量型编码器,试通过博图软件进行组态,用报文的方法,编写变频器正反转程序;<br/>
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