Show simple item record

dc.contributor.authorRanft, Eugen Otto
dc.contributor.authorVan Schoor, George
dc.contributor.authorDu Rand, Carel Petrus
dc.date.accessioned2013-01-11T08:33:51Z
dc.date.available2013-01-11T08:33:51Z
dc.date.issued2011
dc.identifier.citationRanft, E.O. et al. 2011. Self-sensing for electromagnetic actuators. Part 2: Position estimation. Sensors and actuators A: physical, 172(2):410-419. [http://www.journals.elsevier.com/sensors-and-actuators-a-physical/]en_US
dc.identifier.issn0924-4247
dc.identifier.issn1873-3069 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/7868
dc.description.abstractThe second paper in a two part series presents the position estimation scheme for an 8-pole heteropolar active magnetic bearing (AMB). The integrated self-sensing assembly comprises a nonlinear MIMO parameter estimator together with a coupled reluctance network model (Part I), by which problems associated with magnetic cross-coupling and saturation are collectively addressed. The parameter estimator utilizes the first harmonic components of the current and voltage waveforms to determine estimates for the x and y rotor positions. Magnetic saturation is accounted for using a saturation factor, which scales the demodulated coil currents to ensure that the actuator with the lowest flux density contributes the most to the position estimate. Basic functionality and feasibility of the proposed self-sensing scheme are demonstrated via an experimentally validated transient simulation model (TSM). The TSM incorporates magnetic effects such as eddy currents, cross-coupling, and hysteresis. In the second part of this work, the static and dynamic performance of the self-sensing sensor is evaluated. The influence of magnetic cross-coupling, saturation, and duty cycle variation on the position estimate is documented. The results demonstrate the importance of including a mutual coupling term in the position estimation model in order to stably suspend the rotor. Furthermore, stability margin analyses indicate that the robustness of the magnetic bearing control is satisfactory for unrestricted long-term operation.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectSelf-sensingen_US
dc.subjectactive magnetic bearing (AMB)en_US
dc.subjectposition estimationen_US
dc.titleSelf-sensing for electromagnetic actuators. Part 2: Position estimationen_US
dc.typeArticleen_US


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record