发明授权
- 专利标题: Variable-speed generator/motor system
- 专利标题(中): 变速发电机/电机系统
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申请号: US35035申请日: 1987-04-06
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公开(公告)号: US4812730A公开(公告)日: 1989-03-14
- 发明人: Hiroto Nakagawa , Yasuteru Oono , Tadaatsu Kato , Osamu Nagura , Sadahiko Niwa , Yosio Furukawa , Shigehiro Kayukawa
- 申请人: Hiroto Nakagawa , Yasuteru Oono , Tadaatsu Kato , Osamu Nagura , Sadahiko Niwa , Yosio Furukawa , Shigehiro Kayukawa
- 申请人地址: JPX Tokyo JPX Osaka
- 专利权人: Hitachi, Ltd.,Kansai Electric Power Co., Inc.
- 当前专利权人: Hitachi, Ltd.,Kansai Electric Power Co., Inc.
- 当前专利权人地址: JPX Tokyo JPX Osaka
- 优先权: JPX61-78125 19860407
- 主分类号: H02J3/38
- IPC分类号: H02J3/38 ; H02P9/00 ; H02P9/10 ; H02P9/14 ; H02P9/42 ; H02P23/00 ; H02P5/40
摘要:
A generator/motor system comprises a generator/motor having a primary winding and a secondary winding installed on the motor rotor coupled to a prime mover/load, a main circuit interposed between a power system and the primary winding of the generator/motor, an excitation circuit including a frequency converter inserted between a part of the main circuit and the secondary winding of the generator/motor, a frequency difference detector for determining the difference between the frequency of the power system and a frequency dependent on the rotational speed of the load, and a phase-shift control device for controlling the firing phase of the frequency converter in the excitation circuit by use of a signal from the frequency difference detector as a reference signal. In normal operation, a frequency signal following the frequency of the power system is produced, while at the time of a disturbance of the power system, the same frequency signal of the power system as before the disturbance continues to be produced thereby to keep the system in stable operation. For this purpose, a starting electric machine, a synchronous motor and a synchronous generator are aligned, and an output of the synchronous generator is applied to the frequency difference detector.
公开/授权文献
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