Feedforward Flux-Weakening Control of Surface-Mounted Permanent-Magnet Synchronous Motors Accounting for Resistive Voltage Drop

Tursini, M.; Chiricozzi, E.; Petrella, Roberto

doi:10.1109/tie.2009.2034281

Cited by 151 publications

(75 citation statements)

References 20 publications

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“…Jung et al (2013), Kim, Jeong, Nam, Yang, and Hwang (2015), Preindl and Bolognani (2013b), Preindl and Bolognani (2015), Schoonhoven and Uddin (2016), Zhang et al (2016); and for maximum torque per voltage (MTPV), see e.g. Ahn et al (2007), Horlbeck and Hackl (2016), Jung et al (2013), Preindl and Bolognani (2013b), Tursini, Chiricozzi, and Petrella (2010), to name a few. Nevertheless, to the best knowledge of the authors, a unified theory, which covers (a) all operation strategies (such as MTPC, maximum current (MC), FW, MTPV or maximum torque per flux (MTPF)) and (b) allows for an analytical computation of all respective optimal reference currents, (c) while stator resistance and mutual/cross-coupling inductance (magnetic cross-coupling) are explicitly considered,…”

Section: Literature Reviewmentioning

confidence: 99%

“…Even though a robust FW optimal control strategy was presented in Schoonhoven and Uddin (2016), the effects of magnetic cross-coupling and stator resistance were neglected. In Tursini et al (2010), the presented FW strategy takes into account the stator resistance with line approximation of the voltage limits at different speeds. The method calculates the approximated optimal currents with acceptable accuracy and reduced computational requirements as the operating point approaches the rated current limits.…”

Section: Literature Reviewmentioning

confidence: 99%

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A unified theory for optimal feedforward torque control of anisotropic synchronous machines

Eldeeb

Hackl

Horlbeck

et al. 2017

International Journal of Control

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KEYWORDSMaximum torque per ampere (MTPA); maximum torque per current (MTPC); maximum torque per voltage (MTPV); maximum torque per flux (MTPF); maximum current (MC); field weakening (FW); analytical solution; optimal feedforward torque control; efficiency; copper losses; anisotropy; synchronous machine; interior permanent-magnet synchronous machine; reluctance synchronous machine; permanent-magnet-assisted or enhanced synchronous machine; quadrics; quartics; Lagrangian optimisation; operation management ABSTRACT A unified theory for optimal feedforward torque control of anisotropic synchronous machines with non-negligible stator resistance and mutual inductance is presented which allows to analytically compute (1) the optimal direct and quadrature reference currents for all operating strategies, such as maximum torque per current (MTPC), maximum current, field weakening, maximum torque per voltage (MTPV) or maximum torque per flux (MTPF), and (2) the transition points indicating when to switch between the operating strategies due to speed, voltage or current constraints. The analytical solutions allow for an (almost) instantaneous selection and computation of actual operation strategy and corresponding reference currents. Numerical methods (approximating these solutions only) are no longer required. The unified theory is based on one simple idea: all optimisation problems, their respective constraints and the computation of the intersection point(s) of voltage ellipse, current circle or torque, MTPC, MTPV, MTPF hyperbolas are reformulated implicitly as quadrics which allows to invoke the Lagrangian formalism and to find the roots of fourth-order polynomials analytically. The proposed theory is suitable for any anisotropic synchronous machine. Implementation and measurement results illustrate effectiveness and applicability of the theoretical findings in real world.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

A unified theory for optimal feedforward torque control of anisotropic synchronous machines

Eldeeb

Hackl

Horlbeck

et al. 2017

International Journal of Control

View full text Add to dashboard Cite

show abstract

“…Hence, the vector control of the induction machine is no longer performed properly in the high speed range [10]. The field weakening control of induction machines is a well-known method to overcome this difficulty [9], [17], [18]. In this case, however, the output torque capability is decreased.…”

Section: Flux Weakening Controlmentioning

confidence: 99%

“…When a machine operates in high speed ranges, the induced back-electromotive force (EMF) of the induction machine may exceed the limitation of the stator voltage. Hence, the machine output torque capability is reduced since the magnetic flux is decreased in the field weakening region [6]- [9]. Manuscript To improve machine torque capability, the full voltage utilization of the PWM VSI by applying overmodulation techniques has been presented [4], [5], [10], [11], in which the operating range of the PWM inverter can be extended from a modulation index (MI) of 0.906 up to the six-step mode.…”

Section: Introductionmentioning

confidence: 99%

Control Mode Switching of Induction Machine Drives between Vector Control and V/f Control in Overmodulation Range

Nguyễn¹,

Van²,

Lee

et al. 2011

Journal of Power Electronics

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This paper proposes a control mode switching scheme between vector control and constant V / f control for induction machine (IM) drives for maximum torque utilization in a higher speed region. For the constant V / f scheme, a smooth transition method from the linear range of PWM up to the six-step mode is applied, by which the machine flux and torque can be kept constant in a high-speed range. Also, a careful consideration of the initial phase angle of the voltage in the transient state of the control mode change between the vector control and V / f schemes is described. The validity of the proposed strategy is verified by the experiment result for a 3-kW induction motor drives.

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“…The high cost of permanent magnet materials and the limited supply have been signed as its disadvantages [7]. The other problem is that once the magnet is magnetized, it is difficult to achieve flux weakening control [8]. Furthermore, the danger of the irreversible demagnetization should be considered when designing PMSMs.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of a Novel Wound Field Synchronous Machine for Torque Performance Enhancement

2018

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This paper presents the design and optimization of a novel wound field synchronous machine topology, in which permanent magnets (PMs) are introduced into the rotor slot opening with segment configuration for high quality output torque performance. The rotor shape of the proposed PM-assisted wound field synchronous machine with segment configuration is optimized for maximizing the average output torque and decreasing torque ripple under constant PM volume and motor size. The segment configuration can be benefit to improve the reluctance torque. In addition, it is further clarified that the assisted-PM can help to increase the field torque by enlarging the magnetizing synchronous reactance (X f ), as well as increasing airgap flux density. An optimal method combining Kriging method and genetic algorithm is applied for rotor shape optimization of proposed PM-assisted wound field synchronous machine (PMa-WFSM). Then, the 2-D finite-element analysis results, with the aid of JMAG-Designer, are used to confirm the validity. It is determined that the average output torque is improved by 31.66%, and keeps lower torque ripple without decreasing efficiency, increasing PM volume and motor size compared with those of the basic model. Finally, irreversible demagnetization and mises stress analysis verifies the reliability of the novel topology.

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Feedforward Flux-Weakening Control of Surface-Mounted Permanent-Magnet Synchronous Motors Accounting for Resistive Voltage Drop

Cited by 151 publications

References 20 publications

A unified theory for optimal feedforward torque control of anisotropic synchronous machines

A unified theory for optimal feedforward torque control of anisotropic synchronous machines

Control Mode Switching of Induction Machine Drives between Vector Control and V/f Control in Overmodulation Range

Design and Optimization of a Novel Wound Field Synchronous Machine for Torque Performance Enhancement

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