Next Article in Journal
An Image Analysis Approach to Microgrippers Displacement Measurement and Testing
Previous Article in Journal
Pneumatic Actuators
Open AccessArticle

A Driftless Estimation of Orthogonal Magnetic Flux Linkages in Sensorless Electrical Drives

Linz Center of Mechatronics GmbH, Altenberger Straße 69, Linz 4040, Austria
Actuators 2018, 7(4), 63; https://doi.org/10.3390/act7040063
Received: 17 August 2018 / Revised: 14 September 2018 / Accepted: 18 September 2018 / Published: 21 September 2018
Estimations of magnetic flux linkages, either between the stationary windings of the stator for the direct torque control (DTC), or between the stationary windings and the rotor for the sensorless field-oriented control (FOC), are based on integration of corresponding voltages. Integration of voltages with offsets that come from improperly calibrated measurements as well as from transient states generally produces unwanted drifts in the resulting magnetic flux linkages, which when used within any type of control of sensorless electrical drives results in instability. This paper addresses that problem and proposes a simple self-contained solution based on orthogonal properties of waveforms of input voltages and resulting magnetic flux linkages in the frame of reference fixed to the geometry of the stator. The proposed solution requires only two periodic orthogonal input waveforms with a distinct common fundamental harmonic, which as such is independent of the type and parameters of the used machine. The idea of the proposed solution is presented analytically, its stability is proven by means of the quadratic Lyapunov theory, and its functionality is demonstrated by standalone simulations and experiments within the sensorless FOC of a permanent magnet synchronous machine (PMSM). View Full-Text
Keywords: sensorless; electrical drives; permanent magnet synchronous machine; orthogonal; magnetic flux linkages; integration; drift sensorless; electrical drives; permanent magnet synchronous machine; orthogonal; magnetic flux linkages; integration; drift
Show Figures

Figure 1

MDPI and ACS Style

Strinić, T. A Driftless Estimation of Orthogonal Magnetic Flux Linkages in Sensorless Electrical Drives. Actuators 2018, 7, 63.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop