VR3F Voltage Regulator Connections (All Except SR4B for 3500 Engines)
拐点频率和欠频选择
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| 图 1 | g00695812 |
VR3 和 VR3F 之间的物理差异很小。 VR3F 的增益调节孔取消，在上排另外增加了一个接线端（接线端 10）。
VR3F 至发电机或外部选配件的所有连接均与 VR3 相同。 VR3F 的其他配线在以前的图表中显示。
下述资料适用于两个 VR3F 设计：自励式 和 永久磁铁励磁式。
- 为确定拐点频率，如果发电机的工作频率为 60 Hz，在调节器的接线端 6 和接线端 10 之间连接一条跨接导线。 如果发电机的工作频率为 50 Hz，拆下跨接导线。
- 为确定欠频斜率选择，如果期望的欠频斜率为 1:1 V/Hz，在调节器的接线端 6 和接线端 8 之间连接一条跨接导线。 如果需要的欠频斜率为 2:1 V/Hz，拆下跨接导线。
典型的永久磁铁励磁式 VR3F
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| 图 2 | g00702144 |
典型的自励磁式 VR3F
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| 图 3 | g00702012 |
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