A new manipulator structure for power-assist devices

Purpose – This paper introduces a new manipulator structure to configure power-assist devices in order to protect operators from musculoskeletal disorders. The mechanical structure and the control system are presented, along with their main features. Design/methodology/approach – The new structure is designed under the criterion of minimizing the torques required for handling payloads of up to 75 kg in an easily controlled system. Findings – A new structure is provided, based on electrical AC motors and capable of handling high payloads yet exerting low motor torque. Originality/value – The application of the criterion of minimizing the required torques to handle heavy payloads produced a new manipulator structure. This structure is patent protected.