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    • 8. 发明授权
    • Method and device for detecting failure of excitation circuit of polyphase alternator
    • 多相交流发电机励磁电路故障检测方法及装置
    • US08618829B2
    • 2013-12-31
    • US12515666
    • 2007-11-27
    • Jean-Marie PierretPhilippe Masson
    • Jean-Marie PierretPhilippe Masson
    • G01R31/34
    • G01R31/343G01R31/026G01R31/346H02P9/305
    • The method of detecting the failure of the excitation circuit of a polyphase alternator controlled by a regulator comprises the following steps: a) electrical information (Iexc) is continuously taken from the excitation circuit (1); b) the electrical information taken in step a) is continuously compared with a predetermined threshold value (Iref); c) a logic state (LT) is continuously determined according to the result of the comparison made in step b); and d) if the logic state (LT) determined in step c) persists for a time at least equal to a predetermined delay time (6), an electrical continuity fault of said excitation circuit is signalled. This method is particularly suitable for machines having a rotor equipped with permanent magnets or having a high remanence of the magnetic circuit of the rotor.
    • 检测由调压器控制的多相交流发电机的励磁电路故障的方法包括以下步骤:a)从励磁电路(1)连续取出电信息(Iexc); b)将步骤a)中获取的电信息与预定阈值(Iref)连续比较; c)根据在步骤b)中进行的比较的结果连续地确定逻辑状态(LT); 以及d)如果在步骤c)中确定的逻辑状态(LT)持续至少等于预定延迟时间(6)的时间,则发出所述激励电路的导电故障。 该方法特别适合于具有配备有永磁体的转子或具有高转子磁路的高剩磁的机器。