Model Predictive Torque Control for Permanent- Magnet Synchronous Motors Using a Stator- Fixed Harmonic Flux Reference Generator in the Entire Modulation Range

Brosch, Anian; Wallscheid, Oliver; Böcker, Joachim

doi:10.1109/tpel.2022.3229619

Cited by 10 publications

(24 citation statements)

References 44 publications

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“…This switching between different control strategies can lead to undesired transition shocks. Recently published methods [1,8,19,20] solve that problem by enabling an operation in the whole speed and modulation range including a seamless transition to six-step operation with a single control law. Here, only the DBFC [8] attains TOC performance as mentioned in the previous paragraph.…”

Section: A State-of-the-art Techniquesmentioning

confidence: 99%

“…In addition, a harmonic content is added to the flux linkage reference during stationary operation in the overmodulation range to allow a seamless transition to the overmodulation range. The TO-HRG contains the reference pre-rotation (RPR) method [7] and the harmonic reference generator (HRG) method [1] and merges both to obtain the respective advantages of the control methods [7] and [1], see Tab. I.…”

Section: B Contributionmentioning

confidence: 99%

“…As mentioned in Sec. I-B, the proposed TO-HRG makes use of the HRG framework proposed in [1]. Here, voltage trajectories and a motor model (2) in the αβ coordinate system are used to calculate the reference flux linkage trajectories in the overmodulation range.…”

Section: E Overmodulation Schemementioning

confidence: 99%

“…To ensure this desired switching behavior during steady-state operation (i.e. if condition ( 27) is fullfilled) in the overmodulation range, the PC scheme proposed in [1] is applied.…”

Section: G Pulse Clippingmentioning

confidence: 99%

“…1: Linear and overmodulation range, cf. (16), as well as the definition of the sectors, elementary vectors s n , and switching positions of the inverter [1] Fig. 2: Simplified proposed time-optimal control scheme containing the manipulation of the flux reference with the TO-HRG (pre-rotation and addition of harmonic content) and an CCS-MPFC with current and torque constraints control algorithms is an ongoing and important research topic in industry and academia.…”

Section: Introductionmentioning

confidence: 99%

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Time-Optimal Model Predictive Control of Permanent Magnet Synchronous Motors in the Whole Speed and Modulation Range Considering Current and Torque Constraints

Brosch¹,

Wallscheid²,

Böcker³

2023

Preprint

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<p>Improving control dynamics and enabling maximum torque and power conversion for a given electrical drive are important target quantities of drive control algorithms. To utilize the electrical drive to its maximum extent during transient and steady-state operation, a time-optimal continuous-control-set model predictive flux control (CCS-MPFC) for permanent magnet synchronous motors (PMSM) is proposed. This scheme considers torque and current limits as softened state constraints in the CCS-MPFC’s optimization problem to prevent transient overcurrents as well as torque over- and undershoots during time-optimal operating point changes. Furthermore, the overmodulation range including six-step operation can be entered seamlessly to ensure maximum power conversion at high speeds. Fastest transients within the whole modulation range are enabled by a time-optimal harmonic reference generator (TO-HRG). Here, the flux reference of the CCS-MPFC is complemented with a harmonic content that enables operation in the overmodulation region. Further, the reference is pre-rotated during transient operation to attain time-optimal control performance. Extensive simulative as well as experimental investigations for linearly and nonlinearly magnetized PMSMs show that, compared to state-of-the-art methods, time-optimal control performance in the whole modulation range without transient overcurrents as well as torque over- and undershoots can be achieved by the proposed control method.</p>

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Section: A State-of-the-art Techniquesmentioning

confidence: 99%

Section: B Contributionmentioning

confidence: 99%

Section: E Overmodulation Schemementioning

confidence: 99%

“…To ensure this desired switching behavior during steady-state operation (i.e. if condition ( 27) is fullfilled) in the overmodulation range, the PC scheme proposed in [1] is applied.…”

Section: G Pulse Clippingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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