IC693MDL751
IC693MDL751
高功率应用需要电流隔离以防止触发危险的接地环路，否则可能导致噪声，使得两个电路的接地处于不同的电位，进而损害系统的性。此类系统中的电流对人类可能致命，因此确保高水平的性。 电气或电流隔离是指处于不同电位的两个点之间未发生直流循环的状态 。
更确切地说，在电流隔离状态下， 无法将载流子从一个点移至另一点，但电能（或信号）仍然可以通过其他物理现象（如电磁感应、容性耦合或光）交换 。这种情况等效于两个点之间的电阻大；在实践中，达到大约 100 MΩ 的电阻就足够了。如果损坏于电子元器件，则隔离可能是不必要的，但如果控制侧涉及到人的活动，那么高功率侧和低电压控制电路之间需要电流隔离。它能防范高压侧的任何故障，因为即使有元器件损坏或失效，隔离栅也会阻止电力到达用户。为防止触电危险，隔离是监管机构和认证机构的强制要求。以下是关于使用原因和许多功率应用中的电流隔离方法的总结。
IC693MDL751
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