公开(公告)号：US20160241176A1

公开(公告)日：2016-08-18

申请号：US14620218

申请日：2015-02-12

Applicant: General Electric Company

Inventor： Rajeev VERMA ,  Bret Dwayne WORDEN

IPC: H02P9/00

CPC classification number: H02P9/48 ,  H02P9/102 ,  Y02E10/725

Abstract: Methods for detecting a short fault of an alternator rectifier electronic component include sampling a field winding voltage or current signal of an alternator, during operation of the alternator, and determining a fault ripple period at which the alternator field winding signal exceeds a fault threshold. A short fault of an electronic component of a rectifier coupled to the alternator is detected in the event that the fault ripple period closely matches an alternator armature period. Alternatively or additionally, the sampled field winding signal is band pass filtered, and a short fault is detected in the event that an amplitude of the band pass filtered field winding signal exceeds a fault threshold. The methods can be implemented, for example, by an apparatus that includes a hysteresis frequency counter, a frequency comparator, and a countdown timer.

Abstract translation: 用于检测交流发电机整流器电子部件的短路故障的方法包括在交流发电机的运行期间采样交流发电机的励磁绕组电压或电流信号，以及确定交流发电机励磁绕组信号超过故障阈值的故障纹波周期。 在故障波动周期与交流发电机电枢周期紧密匹配的情况下，检测到耦合到交流发电机的整流器的电子部件的短路故障。 或者或另外，采样的场绕组信号被带通滤波，并且在带通滤波的场绕组信号的幅度超过故障阈值的情况下，检测到短的故障。 这些方法可以例如通过包括滞后频率计数器，频率比较器和倒数计时器的装置来实现。