交流电源设备
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如干(gan)电(dian)(dian)(dian)池、蓄电(dian)(dian)(dian)池、直流发电(dian)(dian)(dian)机(ji)等。直流电(dian)(dian)(dian)源(yuan),是维持电(dian)(dian)(dian)路中形成稳恒电(dian)(dian)(dian)压电(dian)(dian)(dian)流的装置。
变频(pin)器进线(xian)(xian)电源(yuan)是市电,市电的(de)N线(xian)(xian)是接地的(de),所(suo)以,L对地电压(ya)220V,N对地电压(ya)是0V。
直(zhi)流(liu)(liu)电(dian)(dian)源的技(ji)术指标(biao)分(fen)为两种:一种是(shi)(shi)特性指标(biao),包括(kuo)允许输(shu)入电(dian)(dian)压、输(shu)出(chu)电(dian)(dian)压、输(shu)出(chu)电(dian)(dian)流(liu)(liu)及(ji)输(shu)出(chu)电(dian)(dian)压调(diao)节(jie)范(fan)围(wei)等(deng);另(ling)一种是(shi)(shi)质量指标(biao),用来衡量输(shu)出(chu)直(zhi)流(liu)(liu)电(dian)(dian)压的稳(wen)定程度(du),包括(kuo)稳(wen)压系(xi)数(或电(dian)(dian)压调(diao)整率)、输(shu)出(chu)电(dian)(dian)阻(zu)(或电(dian)(dian)流(liu)(liu)调(diao)整率)、纹波(bo)电(dian)(dian)压(周围(wei)与随机(ji)漂移)。
变频电(dian)(dian)源是将市电(dian)(dian)中的交流电(dian)(dian)经过AC→DC→AC变换(huan), 输出(chu)为纯净的正(zheng)弦(xian)波(bo),输出(chu)频率和电(dian)(dian)压(ya) 一定(ding)范围内可(ke)调(diao)。
直流电(dian)源(yuan)可以代替电(dian)压(ya)表,因(yin)为(wei)它可以直接将电(dian)压(ya)、电(dian)流显示出来。
线(xian)性(xing)直流电源的特点就是它的功(gong)率器件调(diao)整管工作(zuo)(zuo)在线(xian)性(xing)区,靠调(diao)整管之(zhi)间的电压降来(lai)稳定输出(chu)。线(xian)性(xing)直流电源是因其内部调(diao)整管工作(zuo)(zuo)在线(xian)性(xing)范围而得名。
现象1:输(shu)出有电(dian)(dian)压而无(wu)电(dian)(dian)流(liu)、或者有电(dian)(dian)流(liu)而无(wu)电(dian)(dian)压
直流(liu)电(dian)能(neng)否电(dian)死人?取决于通过人体电(dian)流(liu)的大小,与交流(liu)电(dian)、直流(liu)电(dian)没关系。
通过劳伦(lun)斯伯克(ke)利国家实(shi)验室多(duo)年来的研(yan)究,2011年底已经证明数据中心使用直(zhi)流配电(dian)可能(neng)节约10%-20%的能(neng)源消耗(hao)。
关于(yu)直流(liu)电(dian)源的选择(ze)问(wen)题(ti),究竟是(shi)选晶体(ti)管线性直流(liu)电(dian)源或(huo)者可控硅直流(liu)电(dian)源,还(hai)是(shi)开关电(dian)源呢(ni)?