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Description
The performance of a superconducting linear-actuator demonstrator is evaluated under dynamic excitation. The voice-coil type of device consists of a ReBCO layer-wound stator and a permanent magnet mover. Its design and its static performance were presented earlier, showing a 100 000–fold higher efficiency than copper-based actuators [1]. Under dynamic excitation however, as relevant to various applications, significant AC losses are expected. Furthermore, the ferromagnetic elements in the assembly add to this ReBCO loss and also directly affect the dynamic response of the system. To model this behaviour, an equivalent non-linear electrical circuit is formulated, incorporating also mechanical work, inertia and losses. The model is tested against experiments where the demonstrator is operated in different modes in LN2. Various excitation cases are considered: blocked-mover, free-moving and delivering work; and are presented in terms of active and reactive power flows.
Reference: [1] W.M. Verbruggen, et al. “A compact & efficient linear actuator based on a layer-wound ReBCO solenoid”, submitted to Superconductor Science and Technology.
| Submitters Country | Netherlands |
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| Are you a student? | Yes |
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