廈門君朗益(yi)電(dian)動(dong)車(che)(che)有限公司以交通(tong)運輸為主(zhu)，建立了完(wan)善的產品體系(xi)。主(zhu)營：電(dian)動(dong)車(che)(che)，電(dian)動(dong)旅游觀光車(che)(che)，電(dian)動(dong)巡(xun)邏車(che)(che)，電(dian)動(dong)環衛車(che)(che)，電(dian)動(dong)消防車(che)(che)，電(dian)瓶車(che)(che)租賃(lin)、保養(yang)維修(xiu)等(deng)。

原則上(shang)說，參考點(dian)(dian)(dian)可(ke)以任意(yi)選定。在(zai)電(dian)(dian)工領(ling)域(yu)，通常選電(dian)(dian)路里的接地點(dian)(dian)(dian)為(wei)(wei)參考點(dian)(dian)(dian)，老爺(ye)車翻新，在(zai)電(dian)(dian)子電(dian)(dian)路里，常取(qu)機殼為(wei)(wei)參考點(dian)(dian)(dian)。在(zai)實(shi)際應用時，僅知道兩點(dian)(dian)(dian)間的電(dian)(dian)壓往往不(bu)夠，還要(yao)求(qiu)知道這兩點(dian)(dian)(dian)中哪一點(dian)(dian)(dian)電(dian)(dian)位(wei)高(gao)，哪一點(dian)(dian)(dian)電(dian)(dian)位(wei)低。例如，對于半導(dao)體(ti)二極管來說，還有其陽極電(dian)(dian)位(wei)高(gao)于陰極電(dian)(dian)位(wei)時才導(dao)通；對于直流電(dian)(dian)動機來說，繞組兩端的電(dian)(dian)位(wei)高(gao)低不(bu)同

廈門君朗益電(dian)動車(che)有限公司以交通運(yun)輸為(wei)主，建(jian)立(li)了完善的(de)產品體系。主營：電(dian)動車(che)，電(dian)動旅游觀光車(che)，電(dian)動巡邏(luo)車(che)，電(dian)動環(huan)衛車(che)，電(dian)動消防車(che)，電(dian)瓶車(che)租賃(lin)、保養維修(xiu)等。

電(dian)路(lu)(lu)(lu)或電(dian)路(lu)(lu)(lu)元件的功率定(ding)義為(wei)(wei)：【功率=電(dian)壓*電(dian)流（P=I*V）】。自然(ran)界里(li)能(neng)量(liang)(liang)不會消滅，固(gu)有(you)一定(ding)律【能(neng)量(liang)(liang)守恒定(ding)律】。電(dian)路(lu)(lu)(lu)總功率=電(dian)路(lu)(lu)(lu)功率+各電(dian)路(lu)(lu)(lu)元件功率。例如：【電(dian)源（I*V）=電(dian)路(lu)(lu)(lu)（I*V）+ 各元件（I*V）】在電(dian)路(lu)(lu)(lu)中(zhong)的能(neng)量(liang)(liang)有(you)時會變(bian)為(wei)(wei)熱能(neng)或輻(fu)射能(neng)…等其(qi)他能(neng)量(liang)(liang)到(dao)空氣中(zhong)，這就是電(dian)路(lu)(lu)(lu)或電(dian)路(lu)(lu)(lu)元件會發(fa)熱的原因

廈門君朗益電(dian)(dian)(dian)動(dong)車(che)(che)有限公司以交通運(yun)輸為主，建立了(le)完善的(de)產品體系。主營(ying)：電(dian)(dian)(dian)動(dong)車(che)(che)，電(dian)(dian)(dian)動(dong)旅游觀光車(che)(che)，電(dian)(dian)(dian)動(dong)巡邏車(che)(che)，老(lao)(lao)爺車(che)(che)，電(dian)(dian)(dian)動(dong)環衛(wei)車(che)(che)，老(lao)(lao)爺車(che)(che)翻新，電(dian)(dian)(dian)動(dong)消防車(che)(che)，電(dian)(dian)(dian)瓶車(che)(che)租賃、保(bao)養(yang)維修等。

本來，電(dian)(dian)(dian)流的(de)大小(xiao)用電(dian)(dian)(dian)流強度來表(biao)(biao)示(shi)，而(er)電(dian)(dian)(dian)流強度是(shi)(shi)指在單位(wei)時間內通過(guo)導體(ti)截面(mian)積的(de)電(dian)(dian)(dian)荷量(liang)，其單位(wei)是(shi)(shi)安培（庫/秒），老爺(ye)車租賃，簡稱安，用大寫字母A表(biao)(biao)示(shi)。但電(dian)(dian)(dian)流強度平(ping)時人們多(duo)簡稱電(dian)(dian)(dian)流。所以電(dian)(dian)(dian)流又代表(biao)(biao)一(yi)個(ge)物理(li)量(liang)，這(zhe)是(shi)(shi)電(dian)(dian)(dian)流的(de)第二個(ge)含義。