发明名称 |
METHOD OF STARTING A SYNCHRONOUS MOTOR WITH A BRUSHLESS DC EXCITER |
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. |
申请公布号 |
EP2140546(A2) |
申请公布日期 |
2010.01.06 |
申请号 |
EP20080743150 |
申请日期 |
2008.04.21 |
申请人 |
SIEMENS ENERGY & AUTOMATION, INC. |
发明人 |
OSMAN, RICHARD H.;PATEL, KINJAL;RASTOGI, MUKUL |
分类号 |
H02P1/50;H02P9/30;H02P25/02 |
主分类号 |
H02P1/50 |
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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