Refinement of inverter model considering dead‐time for performance improvement in predictive instantaneous current control

Imura, Akihiro; Takahashi, Tomoya; Fujitsuna, Masami; Zanma, Tadanao; Doki, Shinji

doi:10.1002/tee.21939

Cited by 6 publications

(12 citation statements)

References 15 publications

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“…The configuration of the model predictive-based current control system for PMSMs is shown in Fig. 4 [5][6][7][8].…”

Section: Model Predictive-based Current Controlmentioning

confidence: 99%

“…This section is taken from our earlier study [8]. Dead-time is required to prevent the switching devices from shorting in an inverter.…”

Section: Appendixmentioning

confidence: 99%

“…We have been developing a model predictive‐based current control focusing on instantaneous current for the purpose of both performance improvement and cost reduction in control design . Our model predictive‐based current control approach offers much better control performance than a general proportional‐integral (PI) control .…”

Section: Introductionmentioning

confidence: 99%

“…As for the inverter, we take the voltage vector during the dead‐time into account, which is uniquely determined by the signs of the phase current and the switching pattern in the inverter during the dead‐time. The idea contributes to a considerable reduction of the current offset in the steady state .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Improved PMSM model considering flux characteristics for model predictive‐based current control

Imura

Takahashi

Fujitsuna

et al. 2014

IEEJ Transactions Elec Engng

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Model predictive-based current control, which was proposed in our previous study, offers better current response performance by employing mathematical models of an inverter and a permanent magnet synchronous motor (PMSM). The performance of this kind of approach depends on the predictive model. From a more practical point of view, current behavior in the steady state should be improved. In our previous model predictive-based current control, the inverter model was refined by taking the dead-time into consideration. The use of the refined inverter model reduces the current offset in the control. However, the PMSM model was not investigated. This paper proposes a more appropriate PMSM model for model predictive-based current control in order to improve the current prediction in the steady state. For the purpose, we incorporate more detailed magnetic flux characteristics instead of average characteristics into the improved PMSM model. Specifically, in the improved PMSM model, the inductance of the PMSM is divided into transient and steady-state parts on the basis of magnetic saturation. The effectiveness of the improved model in the model predictive-based current control is demonstrated through simulations and experiments.

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“…The configuration of the model predictive-based current control system for PMSMs is shown in Fig. 4 [5][6][7][8].…”

Section: Model Predictive-based Current Controlmentioning

confidence: 99%

“…This section is taken from our earlier study [8]. Dead-time is required to prevent the switching devices from shorting in an inverter.…”

Section: Appendixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improved PMSM model considering flux characteristics for model predictive‐based current control

Imura

Takahashi

Fujitsuna

et al. 2014

IEEJ Transactions Elec Engng

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“…With the approach, the number of switching operations required for control is explicitly considered, which implies that the trade-off between the number of switching operations and torque ripple can be addressed. In addition, the treatment of dead-time in the inverter and rotation of the rotor are also considered for practical use (28) . The effectiveness of the proposed method is verified through simulations and experiments.…”

Section: Introductionmentioning

confidence: 99%

Model Predictive Direct Torque Control for PMSM with Discrete Voltage Vectors

et al. 2014

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The direct torque control (DTC) of ac motors leads to a faster torque response with a small number of switching operations in inverters when compared with a conventional approach such as vector control. DTC exhibits a hybrid nature in the sense that the system is composed of continuous variables of torque and flux and involves discrete switching in the inverter. The output of the inverter is limited to the finite discrete values at each instance of sampling. Model predictive control (MPC) is applied to the system so that an optimal switching sequence is derived subject to the given constraints. The proposed MPC-based approach reduces the torque ripple with a small number of switching operations. The effectiveness of the proposed MPDTC approach is verified through simulations and experiments by comparing the proposed approach with conventional DTC.

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Optimal voltage vector in current control of PMSM considering torque ripple and reduction of the number of switching operations

Zanma

Tozawa

Takagi

et al. 2020

IET Power Electronics

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This study presents a model predictive-based current control for permanent magnet synchronous motors (PMSMs). In the authors' proposed approach, a reference voltage to an inverter can be strictly treated as a discrete voltage vector so that the output saturation of the inverter is avoided. Various constraints can be also taken into consideration in their approach. Designing the band of frequency is incorporated into a single objective function. The effectiveness of the proposed method is verified through simulations and experiments. Nomenclature i dq = i d i q T dq-axis current vector, A v dq = v d v q T dq-axis voltage vector, V R dq-axis resistance, Ω L d , L q dq-axis winding inductances, H K e electromotive force constant, Vs P n number of pole pairs ω re electrical angular velocity of the rotor, rad/s θ re electrical angle of the rotor, rad

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Refinement of inverter model considering dead‐time for performance improvement in predictive instantaneous current control

Cited by 6 publications

References 15 publications

Improved PMSM model considering flux characteristics for model predictive‐based current control

Improved PMSM model considering flux characteristics for model predictive‐based current control

Model Predictive Direct Torque Control for PMSM with Discrete Voltage Vectors

Optimal voltage vector in current control of PMSM considering torque ripple and reduction of the number of switching operations

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