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Modelling and Field Oriented Position Control of a Helical Reluctance Motor for High Precision Applications
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| Author(s) |
H. Kellermann; G. Kolper; G. Brandenburg; J. Heinzl |
| Abstract |
For a helical reluctance motor (HRM), which is a linear direct drive for long distance motions with a positioning accuracy in the submicrometer range, a high-dynamic position control based on the principle of field orientation has been designed and implemented on a DSP system. In· the first step a new, nonlinear mathematical model . was derived which also includes eddy currents and magnetic saturation and which describes the motor as a rotary reluctance motor in the rotor-fixed d-q coordinate frame. Then the system was completely linearized using a simplified inverse model of the eddy currents
and saturation in combination with field orientation. With a linear state feedback an equivalent time constant of 5 ms for the closed-loop position control, a dynamic stiffness of 5.5 N/μm and a positioning accuracy of 5 nm have been achieved. |
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| Filename: | Unnamed file |
| Filesize: | 457.4 KB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-10 by System |
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