廈門阿米控技術(shù)有限公司

變頻電源是將工業(yè)電網(wǎng)中的交流電經(jīng)過ac-dc-ac變換，輸出為純凈的正弦波，輸出頻率和電壓一定范圍內(nèi)可調(diào)。它有別于用于電機(jī)調(diào)速用的變頻器，也有別于普通交流穩(wěn)壓電源。理想的交流電源的特點是頻率穩(wěn)定、電壓穩(wěn)定、內(nèi)阻等于零、電壓波形為純正弦波(無失真)。

廈門岳航計算機(jī)工程有限公司

聯(lián)系人：李素云

企業(yè)QQ：2851195446，2851195466

手機(jī)：18965423501

座機(jī)：0592-5165501

變頻電源十分接近于理想交流電源，輸出相位偏差在±2°內(nèi)，頻率穩(wěn)定率≤0.01%，負(fù)載穩(wěn)壓率在±0.5%范圍內(nèi)，波形失真度≤2%(阻性負(fù)載)，反應(yīng)時間值為2ms，效率≥85%，帶有輸入、輸出無熔絲開關(guān)，電子電路快速偵測過電壓、過電流、過載、過高溫&短路并自動跳脫保護(hù)及告警等保護(hù)裝置。因此，先進(jìn)發(fā)達(dá)越來越多地將變頻電源用作標(biāo)準(zhǔn)供電電源，以便為用電器提供*優(yōu)良的供電環(huán)境，便于客觀考核用電器的技術(shù)性能。

變頻電源可以帶載各種阻抗特性的負(fù)載，包括電感類、電阻類、整流類常見負(fù)載，需引起重視的是負(fù)載類型不同，所需變頻電源的功率容量有很大不同。

電源容量選擇方法：

阻性：電源容量 = 1.1×負(fù)載功率

感性：電源容量 =負(fù)載啟動電流/負(fù)載額定電流×負(fù)載功率

整流：電源容量 = 負(fù)載電流波峰系數(shù)/1.5×負(fù)載功率

混合型：請按照不同負(fù)載所占比例適當(dāng)選取

注：對于冰箱、空調(diào)之類的感性負(fù)載，應(yīng)按照啟動功率來選擇電源容量。啟動功率一般為額定功率的5-7倍。

通過選擇合理的變頻電源，就能模擬各地的電壓、頻率，獲得可靠的實驗室數(shù)據(jù)，對于使用*為普遍的電機(jī)而言，要按照感性負(fù)載進(jìn)行選擇。我廠使用的電機(jī)功率為3kw，啟動電流約為額定電流的3倍，因此選擇15kva的電源容量已經(jīng)足夠。當(dāng)然，變頻器和變頻電源的價格也不在一個數(shù)量級，變頻電源的價格約為變頻器的10倍。

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