此外，DV707系列變頻器開關電源的計劃仍是有區別與其它變頻器的本地。它選用了一塊型號為MA2810的集成塊，它集成了開關功率管，以及箝位穩壓管等一些元器材于一體，使得開關電源的外圍電路減少了，但我們在修補中MA2810的損壞概率仍是比較高的。
（2）松下變頻器逆變模塊損壞
在VF—7F系列變頻器中，有時也會碰到逆變模塊的損壞。較多見的景象便是變頻器在正常工作中俄然失電，致使變頻器在從頭上電后無法發起電機。經查看逆變模塊損壞，究其原因首要是因為停電后變頻器還在工作指令的控制下，而此時因為電機所帶負載的消耗及變頻器本身的消耗致使基地直流電壓急劇降低，簡略致使PWM調制波信號發作改動，致使功率模塊的損壞，通常在這種情況下，驅動電路是不簡略損壞的。更換逆變模塊，變頻器就能恢復正常工作。碰到此類情況，最佳可以在控制電路上采用措施，停電霎時間關閉變頻器輸出。

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