Influences on the Accuracy of Torque Calculation for Permanent Magnet Synchronous Machines

Thul, Andreas; Groschup, Benedikt; Hameyer, Kay

doi:10.1109/tec.2020.3009490

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…The remanence flux density of the rear earth magnets decrease with increasing temperature. The decreasing rotor flux linkage leads to a decreased permanent magnet torque as shown in [22]. In the simulation, this influence is not considered, because the electromagnetic simulation is performed at room temperature.…”

Section: Influence Of Winding Design On the Operational Limits Of Thementioning

confidence: 99%

Influence of the Preformed Coil Design on the Thermal Behavior of Electric Traction Machines

2021

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Preformed coils are used in electrical machines to improve the copper slot fill factor. A higher utilization of the machine can be realized. The improvement is a result of both, low copper losses due to the increased slot fill factor and an improved heat transition out of the slot. In this study, the influence of these two aspects on the operational improvement of the machine is studied. Detailed simulation models allow a separation of the two effects. A preform wound winding in comparison to a round wire winding is studied. Full machine prototypes as well as motorettes of the two designs are built up. Thermal finite element models of the stator slot are developed and parameterized with the help of motorette microsections. The resulting thermal lumped parameter model is enlarged to represent the entire electric machine. Electromagnetic finite element models for loss calculation and the thermal lumped parameter models are parameterized using test bench measurements. The developed models show very good agreement in comparison to the test bench evaluation. The study indicates that both, the improvements in the heat transition path and the advantages of the reduced losses in the slot contribute to the improved operational range in dependency of the studied operational point.

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Section: Influence Of Winding Design On the Operational Limits Of Thementioning

confidence: 99%

Influence of the Preformed Coil Design on the Thermal Behavior of Electric Traction Machines

2021

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“…For the high saturation IPMSM, due to the restriction of weight and volume, its power density and saturation degree are much higher than those of commercial motors. Hence, in the actual operation process, the change of the motor parameters is more complicated than that of the low saturation motor [27][28][29]. Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Ref. [29] presents that the amplitude of the PM flux linkage will change nonlinearly with the dq-axis currents. These variations of the PM flux linkage will also cause the MTPA control to deviate from the optimal solution, while the above methods ignore these variations.…”

Section: Introductionmentioning

confidence: 99%

Permanent Magnet Flux Linkage Analysis and Maximum Torque per Ampere (MTPA) Control of High Saturation IPMSM

Zhang

Gao

et al. 2023

Energies

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The maximum torque per ampere (MTPA) control is significant for improving the efficiency of the interior permanent magnet synchronous motor (IPMSM). However, for the high saturation IPMSM, the change of the permanent magnet (PM) flux linkage is more complicated, which can cause the MTPA control to deviate from the optimal solution. Therefore, an improved MTPA control method for the high saturation IPMSM is proposed in this paper. Compared with other methods, the proposed method improves the conventional models of flux linkage and torque by analyzing the nonlinear variation of the PM flux linkage with the dq-axis currents. Subsequently, an expression suitable for the MTPA control of high saturated IPMSM is derived based on the improved models. The proposed parameter fitting models are then fitted using data from 11 operating points and incorporated into the MTPA optimization algorithm to obtain the MTPA curve. Finally, the effectiveness of the proposed method in enhancing the control accuracy of the MTPA angle is verified through simulations and experiments.

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Efficient Nonlinear Multi-Parameter Decoupled Estimation of PMSM Drives Based on Multi-State Voltage and Torque Measurements

Liu

Han

Guo

et al. 2023

IEEE Trans. Energy Convers.

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Influences on the Accuracy of Torque Calculation for Permanent Magnet Synchronous Machines

Cited by 5 publications

References 20 publications

Influence of the Preformed Coil Design on the Thermal Behavior of Electric Traction Machines

Influence of the Preformed Coil Design on the Thermal Behavior of Electric Traction Machines

Permanent Magnet Flux Linkage Analysis and Maximum Torque per Ampere (MTPA) Control of High Saturation IPMSM

Efficient Nonlinear Multi-Parameter Decoupled Estimation of PMSM Drives Based on Multi-State Voltage and Torque Measurements

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