The examination of pole geometry of consequent pole type ferrite PM axial gap motor with field winding

Ogawa, Teiichiro; Takahashi, Tomohira; Takemoto, Mikio; Ogasawara, Satoshi; Daikoku, Akihiro

doi:10.1109/iemdc.2017.8002027

Cited by 14 publications

(11 citation statements)

References 7 publications

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“…Prof. Takemoto and his group proposed a basic concept of an axial gap synchronous motor with field winding, intending to apply it to the in‐wheel motor of an automobile . They focused on the consequent‐pole axial rotor motor, and development of this motor has been carried out by Dr. Daikoku and Mr. Ogawa in Mitsubishi Electric Corporation.…”

Section: Vfpm With Wound Field Excitationmentioning

confidence: 99%

“…and his group proposed a basic concept of an axial gap synchronous motor with field winding, intending to apply it to the in-wheel motor of an automobile [17,18]. They focused on the consequent-pole axial rotor motor, and development of this motor Thus far, much research has been conducted to apply the axial gap permanent magnet motors to wheels [19][20][21], but as stated above, the concern of the members of Prof. Takemoto's group has been focused on the consequentpole axial gap motor, and there seems to be no reference from the standpoint of motor design on the optimal combination of the numbers of stator slots and rotor poles to achieve the reduced harmonics involved in the induced emf and torque.…”

Section: Consequent-pole Ferrite Magnet Axial Gap Synchronous Motor Wmentioning

confidence: 99%

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Design and control of variable field permanent magnet motors

Matsui

2019

IEEJ Transactions Elec Engng

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This is a survey paper focusing on permanent magnet motors with variable field capability. The synchronous motors, which have been applied to somewhat limited fields, have garnered attention as attractive electric drives. Due to a connection with rare‐earth magnet and power electronics‐based flexible control, current permanent magnet synchronous motors have achieved the best position in terms of high power and torque densities, high efficiency and flexible control capability. In order to satisfy the diverse demands of users, a motor is requested to ensure high‐efficiency operation at multiple operating points on the speed–torque plane. It is well recognized that maximum efficiency is attained under the condition that the copper loss is equal to the fixed loss, mainly composed of iron loss, at a given operating point. This is why permanent magnet synchronous motors should have the capability of adjusting the field excitation, similar to the direct current shunt motors. In this paper, recent trends of research and development of variable field permanent magnet motors are overviewed from the standpoint of design and control. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Vfpm With Wound Field Excitationmentioning

confidence: 99%

Section: Consequent-pole Ferrite Magnet Axial Gap Synchronous Motor Wmentioning

confidence: 99%

Design and control of variable field permanent magnet motors

Matsui

2019

IEEJ Transactions Elec Engng

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“…As shown in the reverse salient pole motor vector diagrams in Figure , making the permanent magnet (PM) magnetic flux Ψ m variable enables the expansion of the variable speed characteristics by adjustment of the armature interlinkage flux and the improvement of efficiency at the driving point where the iron loss ratio is large due to the magnetic flux. Examples of current representative research include: memory motor systems that make magnetic force of the PMSM variable; methods for adjusting the motor skew angle; methods for adjusting the amount of magnetization of the iron poles of the consequent‐pole structure; methods for utilizing leakage magnetic flux …”

Section: Introductionmentioning

confidence: 99%

“…methods for adjusting the amount of magnetization of the iron poles of the consequent‐pole structure;…”

Section: Introductionmentioning

confidence: 99%

“…In case 2, an external actuator is required for mechanically adjusting the rotor skew angle, and a locking mechanism is required to prevent the relative rotation of the rotor . In case 3, a coil and a DC/DC converter for generating a stationary magnetic field are required and, in principle, it is difficult to utilize the reluctance torque . In case 4, an end plate is required for an actuator for driving the short‐circuited magnetic path; however, variable magnetic force magnets or extra additional equipment are not required, and variable magnetic flux function is realized by modifying the magnetic circuit design of the rotor while applying conventional vector control without modification .…”

Section: Introductionmentioning

confidence: 99%

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Study and experimental performance evaluation of flux intensifying PM motor with variable leakage magnetic flux

Aoyama

Noguchi

2019

Electrical Engineering Japan

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This paper describes a flux intensifying permanent-magnet (PM) motor with variable leakage magnetic flux. The unique feature of this proposed motor is the ability to passively adjust the magnetic flux linkage into the armature windings in proportion to the armature magnetomotive force and/or armature current phase. The magnetic circuit topology of the flux intensifying PM motor and the passive variable leakage magnetic flux are determined through FE analysis. Then, the driving performance is experimentally elucidated through comparison with that of a reverse salient pole type (flux weakening) PM motor without variable leakage magnetic flux. K E Y W O R D S armature current phase, flux intensifying, IPMSM, salient pole, variable leakage magnetic flux, variable magnetic flux 36

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Comparative Study on Variable Flux Memory Machines With Different Arrangements of Permanent Magnets

Xie

Ning

2020

IEEE Access

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Compared with conventional permanent magnet synchronous motor, variable flux memory motor (VFMM) possesses the advantage of adjusting the magnetization state online. Because of its wide speed range and large high-efficiency region, it becomes a competitive candidate for the electric drive system. This paper presents a novel parallel hybrid magnets VFMM which is obtained by updating a conventional series hybrid permanent magnets VFMM. The proposed motor adopts a new permanent magnet arrangement and the combination of low coercive force permanent magnet and high coercive force permanent magnet is used. The proposed parallel hybrid permanent magnets VFMM and the series hybrid permanent magnets VFMM are compared. The equivalent magnetic circuit models of the motors are used to explain the principle of the motors. The finite element analysis method is used to study the fundamental properties, such as open circuit radial flux density, unintentional demagnetization with q-axis current, intentional demagnetization with d-axis current, torque capability, and efficiency characteristics. It was shown the efficiency of the parallel hybrid permanent magnets VFMM is higher in the high-speed region and the magnetization state adjustment range of the parallel hybrid permanent magnets VFMM is larger. INDEX TERMS Equivalent magnetic circuit, hybrid permanent magnet, magnetization state, variable flux memory motor.

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The examination of pole geometry of consequent pole type ferrite PM axial gap motor with field winding

Cited by 14 publications

References 7 publications

Design and control of variable field permanent magnet motors

Design and control of variable field permanent magnet motors

Study and experimental performance evaluation of flux intensifying PM motor with variable leakage magnetic flux

Comparative Study on Variable Flux Memory Machines With Different Arrangements of Permanent Magnets

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