Digital ac servo controllers are permaenet field synchronous motors which offer high dynamic response and wide adjustment ranges.The overall system achieves an optimum power density.The consistent modular design allows the specific selection of the n neccessary individual functional components.The modular system allows optimal configuration for every drive requirement whether controlling speed,torque or position.These servo controllers combine solid technology increased electrical environment compatiblity and various protection features with modern communication concept.The movidyn ac servo controllers meet emc standards en 50081 and complete electrical installation to the emc directive 89/336/eec.