发明名称 |
Turbine generator |
摘要 |
The rotor 2 of a rotating field type turbine generator is provided with slots 3 for accommodating the field windings, wedges 4 positioned at the portions of the magnetic poles on the rotor 2 for holding the field windings and wedges 5 positioned between the magnetic poles on the rotor. These wedges 4 and 5 are constituted by metal bars without joints to enhance damper effect thereby. Magnetomotive forces due to higher harmonics, which causes temperature rise of the rotor 2 and torque ripple during starting with thyristors, induces an elliptic rotating magnetic field having the longer diameter on d axis extending in the direction of magnetomotive force induced by the field windings and the shorter diameter on q axis perpendicular to d axis, and thus a larger eddy current is induced flowing along q axis on the rotor 2 than that flowing along d axis. Therefore the thickness d' in radial direction of the wedges 5 positioned between the magnetic poles on the rotor 2 is determined larger than the thickness d in radial direction of the wedges 4 positioned at the portions of the magnetic poles on the rotor 2 to reduce the resistance of the wedges 5 and to easily lead the eddy current flowing in the axial direction of the rotor 2, thereby a good thermal balance over the entire portions on the rotor 2 is achieved. Drawings to Be Selected FIG.
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申请公布号 |
US5469009(A) |
申请公布日期 |
1995.11.21 |
申请号 |
US19940261381 |
申请日期 |
1994.06.15 |
申请人 |
HITACHI, LTD. |
发明人 |
WAKUI, SHINICHI;IDE, KAZUMASA;KOHARAGI, HARUO;TAKAHASHI, MIYOSHI;MIYAKAWA, KADO;YAGI, YASUOMI |
分类号 |
H02K1/26;H02K3/16;H02K3/487;H02K19/26;(IPC1-7):H02K3/46 |
主分类号 |
H02K1/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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