B． 相對穩(wěn)壓系數(shù)：標明負載不變時，穩(wěn)壓器輸出直流電壓Uo的相對改動量△Uo與輸出電網(wǎng)Ui的相對改動量△Ui之比。急：
S=△Uo/Uo / △Ui/Ui2. 電網(wǎng)調(diào)整率。
它標明輸入電網(wǎng)電壓由額外值改動 -10%時，穩(wěn)壓電源輸出電壓的相對改動量，有時也以必定值標明。
電壓安穩(wěn)度。
負載電流堅持為額外計劃內(nèi)的任何值，輸入電壓在規(guī)矩的計劃內(nèi)改動所致使的輸出電壓相對改動△Uo/Uo（百分值），稱為穩(wěn)壓器的電壓安穩(wěn)度。二． 負載對輸出電壓影響的幾種政策方法。
1． 負載調(diào)整率（也稱電流調(diào)整率）。
在額外電網(wǎng)電壓下，負載電流從零改動到最大時，輸出電壓的最大相對改動量，常用百分數(shù)標明，有時也用必定改動量標明。
2． 輸出電阻（也稱等效內(nèi)阻或內(nèi)阻）。
在額外電網(wǎng)電壓下，因為負載電流改動△IL致使輸出電壓改動△Uo，則輸出電阻為.

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