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PLC - 傳統冷氣vs (ac)變頻冷氣vs (dc)直流變頻. 這篇寫的蠻 ...

傳統冷氣vs (ac)變頻冷氣vs (dc)直流變頻 . 這篇寫的蠻詳細的! . 1.AC變頻DC變頻，都是採PWM(Pulse Width Modulation) 目前用在工控變頻器相當得多。

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