DC and AC Current Transport Characteristics of the HTS Stator Coils in an HTS Induction/Synchronous Motor

Ikeda, Kenichi; Nakamura, Taketsune; Karashima, Tomoharu; Nishino, Ryohei; Yoshikawa, Masaaki; Itoh, Yoshitaka; Terazawa, Toshihisa

doi:10.1109/tasc.2018.2799599

Cited by 16 publications

(5 citation statements)

References 18 publications

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“…where M 2 1 is the mutual inductance between the part of loop 1 corresponding to L 1_ and that of loop 2 corresponding to L 2_ .…”

Section: Discussionmentioning

confidence: 99%

“…Considering that the magnetic field in the iron core of the flux pump is far lower than 1.2 T, therefore, the dependence of the magnetic field in the iron core on the current of the copper coil is treated as linear. In this case, the flux linkage ψ P from the flux pump to loop 2 can be written as equation (2). And the mutual inductance between the flux pump and loop 2 , M p , can be obtained as equation (3), where i m is the current in the copper coil of the flux pump,…”

Section: Electromagnetic Semi-analytical Modelmentioning

confidence: 99%

“…High temperature superconducting (HTS) magnets have the advantages of high current carrying capacity, high thermal * Author to whom any correspondence should be addressed. stability, high critical magnetic field and temperature, and therefore, can be used in many fields [1][2][3][4][5]. There are two magnetizing methods for the existing HTS magnets, one is to energize the magnet directly with the current generated by an external power supply, and the other is to use the induced current to power the magnet by inductive mode, such as by flux pump, field cooling method, zero field cooling method and so on.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A flux pump driven non-soldering closed-loop HTS magnet and its electromagnetic-thermal semi-analytical modelling method

Zhu,

Wang,

Gao

et al. 2023

Supercond. Sci. Technol.

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We propose a new flux pump driven non-soldering closed-loop (NSCL) high temperature superconducting (HTS) magnet free of any soldering joints throughout the magnet for persistent current mode (PCM) operation. All the superconducting parts of the magnet are wound directly with HTS closed-loop ring split from an 8 mm REBCO tape using our new cutting scheme free of any soldering requirements. The magnet contains two single-pancake coils connected in series forming a closed circuit through two parallel bridge branches. Two thermal switches set on the two bridge branches control the on–off of the two bridges. A copper coil with iron core installed around one of the bridges is employed as the flux pump to drive the HTS magnet. An electromagnetic-thermal semi-analytical modelling method is proposed to analyse the pumping process by which the transport current in the magnet is calculated. The theoretical limit equation of the saturation current is improved as well. The proposed method can predict the current of the NSCL HTS magnet during the pumping process and provide results that are close to experiments. Experiments verify both the feasibility of the proposed flux pump driven NSCL HTS magnet and the modelling method. The results show that the NSCL HTS magnet works well in the PCM, which provides inspiration to the design of PCM operation of high field HTS magnets. The proposed modelling method also helps guide the design of different forms of HTS magnets and the flux pumps driving them.

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“…where M 2 1 is the mutual inductance between the part of loop 1 corresponding to L 1_ and that of loop 2 corresponding to L 2_ .…”

Section: Discussionmentioning

confidence: 99%

Section: Electromagnetic Semi-analytical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A flux pump driven non-soldering closed-loop HTS magnet and its electromagnetic-thermal semi-analytical modelling method

Zhu,

Wang,

Gao

et al. 2023

Supercond. Sci. Technol.

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show abstract

“…Many studies on HTS electrical machines have been reported in the literature [21][22][23][24][25]. An example to demonstrate, in [26], a 200 kW three-phase 6-pole synchronous motor was designed and tested.…”

Section: Carbon Nanotubementioning

confidence: 99%

Electrical Machines Winding Technology: Latest Advancements for Transportation Electrification

2022

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The ever-increasing demand for higher-power dense electrical machines has resulted in different electrical, mechanical, and thermal stresses, which can eventually cause machine failure. For this reason, the management of stresses and losses must be thoughtfully investigated to have a highly reliable electrical machine. The literature agrees that winding losses are the dominant loss mechanism in many electrical machines. However, statements vary on how to mitigate these losses along with the aforementioned stresses. To avoid winding failure, a study of the various winding topologies would allow for a better consideration of the challenges and limitations in the performance of different electrical machines. To this aim, this paper introduces a comprehensive review for different winding topologies. Many reported cases in the literature are summarized and compared. Moreover, the utilization of additive manufacturing (AM) in the production of the machine windings is presented, showing a high level of maturity of this emerging technology. Finally, different challenges facing the design of machine windings are introduced including the AC high frequency losses, thermal management, mechanical and acoustic problems, insulation aging, automated production, and winding manufacturability.

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“…Under such circumstances, it is of great importance to develop general AC servo drive technology with independent intellectual property rights. In practical applications, the development of the controller can also fill the gap in China (Ren et al, 2016;Liu et al, 2016;Ikeda et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Linearisation control of AC permanent magnet synchronous motor servo system based on sensor technology

Liu

2020

IJBM

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AC permanent magnet synchronous motor servo control system is a complex nonlinear, strong coupling and time-varying system. It has strong uncertainty and nonlinearity, and when the system is running, it also will be disturbed to varying degrees, so the conventional control strategy is difficult to meet the control requirements of high accuracy, high speed and high-performance servo system. This paper adopts a direct feedback linearisation control strategy based on sensor technology and uses, as the output of the system to realise the decoupling of the system. In addition, the grey prediction is added to overcome the shortcomings of direct feedback linearisation that is sensitive to parameters. Adjusting the uncertain factors block by grey prediction to adapt to the direct feedback linearisation rule and achieve the desired effect. MATLAB/Simulink is used to complete the simulation of servo control algorithm. The simulation results show that the direct feedback linearisation control is better than the conventional PID control, and the direct feedback linearisation control algorithm with grey prediction can improve the performance of the permanent magnet synchronous motor servo control system and can meet the basic requirements of the high-performance servo control system.

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DC and AC Current Transport Characteristics of the HTS Stator Coils in an HTS Induction/Synchronous Motor

Cited by 16 publications

References 18 publications

A flux pump driven non-soldering closed-loop HTS magnet and its electromagnetic-thermal semi-analytical modelling method

A flux pump driven non-soldering closed-loop HTS magnet and its electromagnetic-thermal semi-analytical modelling method

Electrical Machines Winding Technology: Latest Advancements for Transportation Electrification

Linearisation control of AC permanent magnet synchronous motor servo system based on sensor technology

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