Force density improvements from increasing the number of airgap surfaces in synchronous linear actuators

摘要: This paper presents a realistic comparison of several electromagnetic architectures for high force density actuators. Four equivalent are chosen and computed with two-dimensional finite element model. For each architecture, size is optimised in order to maximise the force-volume ratio. optimisation step performed fixed mechanical airgap. A thermal model then used calculate current coils. Results show that global-coil architecture performance increases more sharply than other architectures; scaling effect thereby introduced architectures. multi-airgap actuator presented illustrate theoretical results.