Input and output filter is a kind of passive low-pass filter, filter is based on the inverter in the work, the power grid and other digital electronic devices produce interference Frequency spectrum component of the electromagnetic compatibility features specifically designed. Not only can effectively inhibit propagation along the power line conducted interference, but also can greatly reduce the electronic equipment Radiated interference, materials and components are tested by the worst environment, has the size, no fan, on-site installation, convenient operation, applicable to all brands The inverter.