GLENAYNE ELECTRONICS 140-1953 DUAL SCSI (270MB) HARD DRIVE VME MODULE (USED)0.000.6外，分別測試了電動機端上屯壓的波形上升沿處過電壓的幅消，以及上升時間的變化。
與濾波器電阻的關(guān)系，其中電纜長度為45濾波時�？梢钥闯�，當(dāng)濾波器電阻近似等于或小于00，時，濾波器的電容高頻振蕩的幅值及波形有顯著的影響，隨著濾波器電容的減小，高頻振蕩的幅值，大，濾波效果變差。而當(dāng)濾波器電阻遠大于的時，濾波器的電容高頻振蕩的幅值及波形的影響艮小。！濾波器的及和與電動機端過電壓的關(guān)系按照述濘法在電纜度分別為和了萬，時，在不同的濾波器電阻及電容下，測取的電動機端電壓上升沿處的波形，從而得到電動機端電壓上升沿處過電壓倍率與濾波器電阻及電容的關(guān)系曲線，3，
其中過電壓倍率為上升沿處的電壓峰值與穩(wěn)態(tài)值，即近似等于變頻器輸出電壓幅值之比，從3中清楚地看出濾波器的電容值，越濾波器電阻及電容0的關(guān)系大，濾波器的電阻值及越小，則過電壓的倍率就越小過屯壓倍率隨電容增而變化的幅度勾有關(guān)，及越大，過電壓倍率隨電容的變化幅度越小，而當(dāng)及大于50，時，過電壓倍率隨電容的變化幅度則很小。另外電纜長度越長，過電壓倍率也相應(yīng)略，大這樣看來，電纜長度為75時。如，大于0.02沖，垮小于50，過電壓的倍率將不超2.4濾波器的垮和，與電動機端上升沿時間的關(guān)系同樣，在電纜長度分別為3，和75時，在不同的濾波器電阻及電容下，測取的電動機端電壓上升沿處的波形，從而得到電動機端電壓上升沿時間與濾波器電阻及電容的關(guān)系曲線，4所，從上，沿時間就越人，且隨濾波器的電容值，的和；當(dāng)及大于50，時，上升沿時間與電容值幾乎無知當(dāng)心況遼小處于荇交點此時+，小于0.04時，上升沿時間隨的增大而增加，而當(dāng)，大于0.04，時，上升沿時間與電容值無關(guān)。另外，電纜長度越長，上升沿時間也相應(yīng)增大。這樣看來，當(dāng)電纜長度為75，時，如大于0.0沖，及近似為00，則上升沿時間超過9心，它是濾波前約0.45的2倍。
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