2023 Fiscal Year Final Research Report
Study on Extended Maximum Torque Control of Novel Adjustable Field Motor Based on Permeability Modulation
| Project/Area Number |
21K04022
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21010:Power engineering-related
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 可変界磁PMモータ / 透磁率変調 / 拡張MTPA / d軸電流 / q軸電流 / 零軸電流 / 三相4線式インバータ / デュアルインバータ |
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| Outline of Final Research Achievements |
The objective of this study is to establish a maximum torque control (extended MTPA) method in the 3D-space including a zero-sequence current, which is needed to make the adjustable field PM motor based on a permeability modulation technique.
Through the entire research activity, the following items have been conducted: (1) theoretical discussion on combination among the d-axis, q-axis, and zero-axis currents in the 3D-space to obtain the maximum output torque; (2) formulation of the extended MTPA condition in the 3D-space, and clarification of control algorithm of the d-axis, q-axis, and zero-axis currents; (3) verification of the three-axes current control through simulation tests; and (4) Operation tests using a three-phase 4-wire inverter and/or a dual inverter. As a result, some expected research goals have been achieved.
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| Free Research Field |
パワーエレクトロニクス，電気機器
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| Academic Significance and Societal Importance of the Research Achievements |
従来，d軸電流とq軸電流による二次元的な電流制御に立脚した最大トルク制御（MTPA制御）を，本研究によって零軸電流制御も含めることによって三次元的な電流制御によるMTPA制御に拡張することができた。これによって，零軸電流を可変界磁に有効活用した可変界磁PMモータのベクトル制御の制御自由度を更に拡張し，(1) 減磁の懸念がある逆磁界をPMにかけることなくPMモータの界磁を可変できるようになった。(2) 可変界磁のために零軸電流を活用するのでインバータの構成を大きく変更することなくモータドライブを実現できる。(3) 低速大トルク運転と高速運転を両立でき，高効率運転領域を拡大できる。
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