Plant, Process and Control
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Hydraulic actuator replacement: accurately sizing an electric upgrade

Achieving equivalent forces to hydraulic designs, electric linear actuators are more precise and reliable, and they’re also less expensive to run. When upgrading to an electric linear actuator, accurate sizing of the existing application is crucial to achieve the most efficient and cost-effective specification.

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Integrated servo feedback: the role of Hall-effect sensors and resolvers

Hall-effect sensors and resolvers are feedback devices that are usually integrated directly into a servo system from brands like Kollmorgen. As lower-cost options compared to encoders, Hall-effect sensors can be used in combination with high-precision sensors. They can also provide feedback sensing in their own right for certain applications. Meanwhile, resolvers are still favoured when high resolution feedback is required in rugged environments.
Gerard Bush, engineer at INMOCO, explains the technology behind Hall-effect sensors and resolvers

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