Dynamic Current Control to Compensate for Magnetic Mutual Coupling in Electrically Excited Synchronous Machines

Tang, Junfei; Liu, Yujing

doi:10.1109/icem49940.2020.9270842

Cited by 6 publications

(5 citation statements)

References 11 publications

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“…While [10,11] do not handle the voltage constraints at all (neither the wind-up effect nor the really feasible voltage), [12][13][14][15][16] propose anti-windup methods, however, the voltage saturation is considered in classical ways; e.g. in [13,14], the voltage is saturated by the switching device and not handled (optimally). In [15,16], the d and q voltages are saturated independently and in [12], both voltages are limited by the Euclidean norm of the voltage vector.…”

Section: B Problem Statementmentioning

confidence: 99%

“…In [15,16], the d and q voltages are saturated independently and in [12], both voltages are limited by the Euclidean norm of the voltage vector. If the voltage limitation is not properly addressed during controller design/implementation, the current control performance is deteriorated in particular cross couplings effects [14] may be massive.…”

Section: B Problem Statementmentioning

confidence: 99%

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Optimal reference voltage saturation for nonlinear current control of synchronous machine drives

Monzen,

Hackl

2024

Preprint

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An optimal reference voltage saturation (ORVS) for nonlinear current control of synchronous machine drives is presented. It is integrated into a nonlinear current control system based on input/output (I/O) linearization and proportional-integral (PI) controllers with anti-windup. The ORVS is derived from an optimization problem that can be solved analytically. The deviation between the desired current dynamics obtained by the proportional-integral (PI) current control system if the voltage constraints were not present and the feasible current dynamics due to the saturated voltage is minimized. Finally, the proposed ORVS is compared to (i) classical (vector-valued) reference voltage saturation and (ii) the absence of any saturation and/or anti-windup. The simulative comparison is done for a highly nonlinear, anisotropic reluctance synchronous machine (RSM) whose parameters and look-up tables were obtained from a real machine. The simulation results show that the proposed ORVS outperforms the other two approaches in terms of current tracking accuracy and faster current dynamics.

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Section: B Problem Statementmentioning

confidence: 99%

Section: B Problem Statementmentioning

confidence: 99%

Optimal reference voltage saturation for nonlinear current control of synchronous machine drives

Monzen,

Hackl

2024

Preprint

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“…Option B (Inside beneath the stator end windings) is often used in current publications [9,10,15,16,32]. Typically, variant B1 with the transmission on the N.D.E.…”

Section: Construction Of the Prototypementioning

confidence: 99%

“…Slip rings transmit the electrical power onto the rotating rotor windings. In research and the literature, several concepts with a Wireless Power Transfer (WPT) system are discussed, called Inductive Electrically Excited Synchronous Machines (iEESMs), see [8][9][10][11][12][13][14][15][16]. The systems could be divided according to their operation frequency (<20-30 kHz and >100 kHz).…”

Section: Introductionmentioning

confidence: 99%

Inductive Electrically Excited Synchronous Machine for Electrical Vehicles—Design, Optimization and Measurement

2023

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The demand for electric machines has been rising steadily for several years—mainly due to the move away from the combustion engine. Synchronous motors with rare earth permanent magnets are widely used due to their high power densities. These magnets are cost-intensive, cost-sensitive and often environmentally harmful. In addition to dispensing with permanent magnets, electrically excited synchronous machines offer the advantage of an adjustable excitation and, thus, a higher efficiency in the partial load range in field weakening operation. Field weakening operation is relevant for the application of vehicle traction drive. The challenge of this machine type is the need for an electrical power transfer system, usually achieved with slip rings. Slip rings wear out, generate dust and are limited in power density and maximum speed due to vibrations. This article addresses an electrically excited synchronous machine with a wireless power transfer onto the rotor. From the outset, the machine is designed with a wireless power transfer system for use in a medium-sized electric vehicle. As an example, the requirements are derived from the BMW’s i3. The wireless power transfer system is integrated into the hollow shaft of the rotor. Unused space is thus utilized. The overall system is optimized for high efficiency, especially for partial load at medium speed, with an operation point-depending optimization method. The results are compared with the reference permanent magnet excited machine. A prototype of the machine is built and measured on the test bench. The measured efficiency of the inductive electrically excited synchronous machine is up to 4% higher than that of the reference machine of the BMW i3.

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“…The dynamic current control scheme applied in this study is the one presented in [17]. The aim of the dynamic current control is to decouple the d-axis, q-axis and field currents, so that the machine can be regarded as a stacking of three single-input single-output (SISO) systems.…”

Section: Dynamic Current Controlmentioning

confidence: 99%

Observations of Field Current and Field Winding Temperature in Electrically Excited Synchronous Machines with Brushless Excitation

Tang

Jiang

Boscaglia

et al. 2022

2022 International Conference on Electrical Machines (ICEM)

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Dynamic Current Control to Compensate for Magnetic Mutual Coupling in Electrically Excited Synchronous Machines

Cited by 6 publications

References 11 publications

Optimal reference voltage saturation for nonlinear current control of synchronous machine drives

Optimal reference voltage saturation for nonlinear current control of synchronous machine drives

Inductive Electrically Excited Synchronous Machine for Electrical Vehicles—Design, Optimization and Measurement

Observations of Field Current and Field Winding Temperature in Electrically Excited Synchronous Machines with Brushless Excitation

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