Abstract
We report present status of NEDO project on "Superconducting bearing technologies for flywheel energy storage systems". We fabricated a superconducting magnetic bearing module consisting of a stator of resin impregnated YBaCuO bulks and a rotor of NdFeB permanent magnet circuits. We obtained levitation force density of 8 N/cm2 at 81 K and rotation loss per levitation force of 3 mW/N at 77 K. We confirmed that both pre-loading and excess cooling methods are effective for suppressing gradual fall of rotor due to flux creep. We designed a 10 kWh class flywheel energy storage test system and investigated feasibility of active magnetic bearings for controlling rotation axis vibration under high speed rotation of the flywheel.
| Original language | English |
|---|---|
| Pages (from-to) | 444-450 |
| Number of pages | 7 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 386 |
| DOIs | |
| Publication status | Published - 2003 Apr 15 |
| Externally published | Yes |
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Keywords
- Active magnetic bearing
- Flywheel energy storage system
- Levitation force
- Rotation loss
- Superconducting magnetic bearing
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Progress of superconducting bearing technologies for flywheel energy storage systems. / Koshizuka, N.; Ishikawa, F.; Nasu, H.; Murakami, Masato; Matsunaga, K.; Saito, S.; Saito, O.; Nakamura, Y.; Yamamoto, H.; Takahata, R.; Itoh, Y.; Ikezawa, H.; Tomita, M.
In: Physica C: Superconductivity and its Applications, Vol. 386, 15.04.2003, p. 444-450.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Progress of superconducting bearing technologies for flywheel energy storage systems
AU - Koshizuka, N.
AU - Ishikawa, F.
AU - Nasu, H.
AU - Murakami, Masato
AU - Matsunaga, K.
AU - Saito, S.
AU - Saito, O.
AU - Nakamura, Y.
AU - Yamamoto, H.
AU - Takahata, R.
AU - Itoh, Y.
AU - Ikezawa, H.
AU - Tomita, M.
PY - 2003/4/15
Y1 - 2003/4/15
N2 - We report present status of NEDO project on "Superconducting bearing technologies for flywheel energy storage systems". We fabricated a superconducting magnetic bearing module consisting of a stator of resin impregnated YBaCuO bulks and a rotor of NdFeB permanent magnet circuits. We obtained levitation force density of 8 N/cm2 at 81 K and rotation loss per levitation force of 3 mW/N at 77 K. We confirmed that both pre-loading and excess cooling methods are effective for suppressing gradual fall of rotor due to flux creep. We designed a 10 kWh class flywheel energy storage test system and investigated feasibility of active magnetic bearings for controlling rotation axis vibration under high speed rotation of the flywheel.
AB - We report present status of NEDO project on "Superconducting bearing technologies for flywheel energy storage systems". We fabricated a superconducting magnetic bearing module consisting of a stator of resin impregnated YBaCuO bulks and a rotor of NdFeB permanent magnet circuits. We obtained levitation force density of 8 N/cm2 at 81 K and rotation loss per levitation force of 3 mW/N at 77 K. We confirmed that both pre-loading and excess cooling methods are effective for suppressing gradual fall of rotor due to flux creep. We designed a 10 kWh class flywheel energy storage test system and investigated feasibility of active magnetic bearings for controlling rotation axis vibration under high speed rotation of the flywheel.
KW - Active magnetic bearing
KW - Flywheel energy storage system
KW - Levitation force
KW - Rotation loss
KW - Superconducting magnetic bearing
UR - http://www.scopus.com/inward/record.url?scp=0037445737&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037445737&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(02)02206-2
DO - 10.1016/S0921-4534(02)02206-2
M3 - Article
AN - SCOPUS:0037445737
VL - 386
SP - 444
EP - 450
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
ER -