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Dynamic performance of a rectilinear screw-thread motor

Dynamic performance of a rectilinear screw-thread motor

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© The Institution of Electrical Engineers
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The paper describes the dynamic performance of a linear reluctance motor capable of operating over displacements of 1 m or more, with good positional accuracy. The main features of the motor, together with its static performance, were described in an earlier paper. The method of energising the machine is described. A detailed assessment of dynamic performance is made and this is verified by experimental results. The linear incremental open-loop transfer function is derived, taking into account eddy-current effects. Voltage-and current-drive performances are compared. It is also shown that eddy currents have a significant effect on dynamic performance. Measurements of open-loop performance and closed-loop force control are included.

Inspec keywords: transfer functions; linear motors; reluctance motors; eddy currents

Other keywords: dynamic performance; linear reluctance motor; linear incremental open loop transfer function; rectilinear screw thread motor; eddy current effects

Subjects: Linear machines; Asynchronous machines

References

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