Analysis of Magnetization Characteristics of HTS Bulk Rotor in A Rotating Magnetic Field

Nakamura, Taketsune; Jung, Hun-June; Tanaka, N.; Muta, Itsuya; Fukui, Kuniaki

doi:10.1007/1-4020-3169-6_30

Cited by 2 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…That is, the fabricated motor starts rotating at smaller I a by increasing the temperature when I a is smaller than around 2.5 A rms . We have already reported that the induced standstill torque is approximately proportional to the area of the hysteresis loop measured at the surface of the bulk rotor in the case of a small magnetomotive force [18,19,23,26]. The rotation of the motor is surely realized by this torque generation.…”

Section: Rotating Characteristicsmentioning

confidence: 88%

“…On the other hand, 1 Author to whom any correspondence should be addressed. because the hysteresis motor has a simpler structure and easier operation among the aforementioned motors, fundamental as well as applicability studies have widely been carried out with fractional horse-power motors [1,2,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…In such motor systems, Y 1 Ba 2 C 3 O 7−x (YBCO) bulk material has mainly been utilized as a solid rotor, because it has comparatively stronger flux pinning force as well as better magnetic field dependency at higher temperatures such as 77 K. In contrast, it is known that adequate flux penetration without flux motion, e.g., flux flow, is necessary for the generation of larger torque [19][20][21][22][23][24][25][26] and smooth synchronization [21]. Furthermore, from the viewpoint of the system characteristics, this flux penetration is also crucial for the reduction of the harmonic components of the airgap magnetic field distribution [19,20,22].…”

Section: Introductionmentioning

confidence: 99%

“…As one of such studies, we have been investigating the Bi-2223 bulk motor [17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synchronization of an axial-type Bi-2223 bulk motor operated in liquid nitrogen

Nakamura¹,

Jung²,

Muta³

et al. 2004

Supercond. Sci. Technol.

View full text Add to dashboard Cite

We fabricated and tested an axial-type Bi-2223 bulk motor that was operated in liquid nitrogen. The rotating characteristics were tested as a function of temperature, which was controlled by evacuating the metal cryostat with a rotary vacuum pump. The tests were performed for different air-gap lengths. It was found for the first time that the synchronization was realized when the operating temperature as well as the armature current was set to the appropriate range. Furthermore, the no-load test results showed that the rotating speed had no hysteretic characteristics through the increasing and decreasing process of the armature current even after the motor was pulled-in, and this result indicated that there were no trapped fluxoids in the bulk rotor.

show abstract

Section: Rotating Characteristicsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…As one of such studies, we have been investigating the Bi-2223 bulk motor [17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synchronization of an axial-type Bi-2223 bulk motor operated in liquid nitrogen

Nakamura¹,

Jung²,

Muta³

et al. 2004

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Both YBCO (Y-Ba-Cu-O) [21], actually allowing a current density up to at liquid nitrogen temperature and BSCCO (Bi-Sr-Ca-Cu-O) [22]- [25] were been used to build these types of motors. Electrical machines with bulk HTS rotor present a complex behavior, showing both synchronous and asynchronous regimes.…”

mentioning

confidence: 99%

Experimental Characterization of a Conventional (Aluminum) and of a Superconducting (YBCO) Axial Flux Disc Motor

Inácio

Pina

Luis

et al. 2011

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

An equivalent model and electromechanical characteristics for the disk motor was obtained based on the Steinmetz parameters. This paper describes a series of tests conducted on an axial flux motor, equipped with an aluminum rotor disc and an YBCO high temperature superconducting rotor disc, at liquid nitrogen temperature (77 K). The rotating magnetic field was produced by a four-pole, three-phase stator winding, at 50 Hz. At asynchronous permanent regime, Steinmetz-type models are able to describe both motors' behavior. From the performed tests, the parameters of both motors' models were deduced. A variable load was used to obtain both motor's characteristics (conventional and superconducting). Experimental obtained characteristics of both motors are compared with the ones predicted from parameters' calculation. The HTS motor provides high efficiency then the conventional ones.Index Terms-Axial flux disc motor, HTS materials, YBCO.

show abstract

Analysis of Magnetization Characteristics of HTS Bulk Rotor in A Rotating Magnetic Field

Cited by 2 publications

References 4 publications

Synchronization of an axial-type Bi-2223 bulk motor operated in liquid nitrogen

Synchronization of an axial-type Bi-2223 bulk motor operated in liquid nitrogen

Experimental Characterization of a Conventional (Aluminum) and of a Superconducting (YBCO) Axial Flux Disc Motor

Contact Info

Product

Resources

About