发明授权
US07977910B2 Method of starting a synchronous motor with a brushless DC exciter
有权
用无刷直流励磁机启动同步电机的方法
- 专利标题: Method of starting a synchronous motor with a brushless DC exciter
- 专利标题(中): 用无刷直流励磁机启动同步电机的方法
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申请号: US12105766申请日: 2008-04-18
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公开(公告)号: US07977910B2公开(公告)日: 2011-07-12
- 发明人: Richard H. Osman , Kinjal Patel , Mukul Rastogi
- 申请人: Richard H. Osman , Kinjal Patel , Mukul Rastogi
- 申请人地址: US GA Alpharetta
- 专利权人: Siemens Industry, Inc.
- 当前专利权人: Siemens Industry, Inc.
- 当前专利权人地址: US GA Alpharetta
- 代理商 Filip A. Kowalewski
- 主分类号: H02P23/00
- IPC分类号: H02P23/00 ; H02P25/00 ; H02P1/50
摘要:
A starting method and system for a motor where the motor may be started as an induction motor by applying a magnetizing current to build flux through the stator, with the field current set at the maximum permissible exciter stator current (i.e., the current that will cause rated no-load current in the main field at the transition speed). The motor stator currents will be maintained at a value that allows the motor to generate sufficient breakaway torque to overcome any stiction. At a specific transition speed or after a period of time, the drive will initiate a transition from induction motor control to synchronous motor control by removing the initial magnetizing current, and a field current is then applied to the motor through the DC exciter. Once this transition is completed, the drive may ramp up to the desired speed demand.
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