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Your search keyword '"Sanada, Masayuki"' showing total 157 results
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157 results on '"Sanada, Masayuki"'

10. Experimental Verification of Four-Layer SynRM With Asymmetric Rotor Structure in the Stacking Direction.

Author

Kobayashi, Marika, Morimoto, Shigeo, Sanada, Masayuki, Inoue, Yukinori, Tamamura, Shuhei, and Maetani, Tatsuo

Subjects
RELUCTANCE motors, SYNCHRONOUS electric motors, INDUCTION motors, PERMANENT magnet motors, FINITE element method, ROTORS
Abstract

Synchronous reluctance motors (SynRMs) with four layers of flux barriers are currently in practical use as high-efficiency motors for industrial applications. While SynRMs have higher efficiency than induction motors, they have a high torque ripple. In this study, an asymmetric rotor structure was designed to reduce the torque ripple of the four-layer SynRM, considering the mechanical strength. Two rotor structures with different flux barrier angles were combined in the stacking direction, and the ratio of the combination was optimized by finite element analysis. In addition, prototypes of the initial structure and proposed asymmetric structure were manufactured, and their torque and efficiency characteristics were measured. The experimental results show that the proposed asymmetric structure can reduce the torque ripple while maintaining the basic characteristics such as average torque and efficiency. [ABSTRACT FROM AUTHOR]

Published
2022
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34. Automatic Design of IPMSMs Using a Genetic Algorithm Combined with the Coarse-Mesh FEM for Enlarging the High-Efficiency Operation Area.

Author

Nakata, Tomoki, Sanada, Masayuki, Morimoto, Shigeo, and Inoue, Yukinori

Subjects
*PERMANENT magnet motors, *SYNCHRONOUS electric motor design & construction, *GENETIC algorithms, *FINITE element method, *ENERGY consumption
Abstract

Interior permanent magnet synchronous motors (IPMSMs) are often used in applications that demand high performance. Interest has increased in designing IPMSMs in the enlargement high-efficiency operation area. Designing to meet such specifications can be difficult and time consuming. Combining a genetic algorithm (GA) with the coarse mesh finite element method (FEM) can automate the process and reduce the time it takes to design an IPMSM to meet such specifications. This study describes the motor design and explores the usefulness of designing motors having the large high-efficiency operation area using the GA combined with the coarse-mesh FEM. [ABSTRACT FROM AUTHOR]

Published
2017
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40. Maximum Torque Per Ampere Control in Stator Flux Linkage Synchronous Frame for DTC-Based PMSM Drives Without Using q-Axis Inductance.

Author

Shinohara, Atsushi, Inoue, Yukinori, Morimoto, Shigeo, and Sanada, Masayuki

Subjects
PERMANENT magnet motors, SYNCHRONOUS electric motors, TORQUE control, STATORS, ELECTRIC inductance
Abstract

When direct torque control (DTC) is applied to permanent-magnet synchronous motor (PMSM) drives, the relationship between the torque and stator flux linkage is important for high-efficiency drives because DTC requires them as references. In the stator flux linkage synchronous frame (M–T frame), the torque is described by a simple equation using the T-axis current. However, the M-axis current is neglected in the equation. This paper derives the relationship between the M-axis current and the stator flux linkage, and proposes a maximum torque per ampere (MTPA) control strategy for direct torque controlled PMSM drives using the above relationship. The proposed method does not require the q-axis inductance, which often varies due to the magnetic saturation. The simulation and experimental results verify that the MTPA condition can be obtained with the proposed method. [ABSTRACT FROM AUTHOR]

Published
2017
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41. Direct Calculation Method of Reference Flux Linkage for Maximum Torque per Ampere Control in DTC-Based IPMSM Drives.

Author

Shinohara, Atsushi, Inoue, Yukinori, Morimoto, Shigeo, and Sanada, Masayuki

Subjects
MOTOR drives (Electric motors), AMPERES, TORQUE, FLUX (Energy), QUARTIC equations, SIMULATION methods & models
Abstract

This paper proposes a maximum torque per ampere control strategy for direct-torque-controlled interior permanent magnet synchronous motor drives. The proposed method is based on the solutions of a quartic equation, a motor model in the d-q rotating frame often used for the synchronous motor controllers, and a well-known equation for maximum torque per ampere control. Therefore, the proposed method does not use a lookup table that depends on parameters of the motor and that has to be created in advance. In addition, the proposed method can use the estimated parameters. Particularly, the variations of the d- and q-axes inductances can be estimated when the inductances are modeled as the functions of the d- and q-axes current. The simulation results validate that the proposed method can achieve the maximum torque per ampere control. In addition, the simulation and experimental results verify the accuracy improvement of the maximum torque per ampere control with the iterated calculation. [ABSTRACT FROM AUTHOR]

Published
2017
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