Integrated APU Generator Constant Speed Drive

摘要

An integrated APU-generator constants speed drive system having various features is disclosed. The system may have a gearbox having a differential with a constant speed gearbox output and a hydraulic output controller control shaft. The system may have a hydraulic output speed controller that adjusts the angular velocity of the hydraulic output controller control shaft of the differential. In response, the differential may adjust the angular velocity of the constant speed gearbox output. In this manner, the angular velocity of the constant speed gearbox output may be maintained at a substantially constant angular velocity. A generator may be driven by the constant speed gearbox output. By maintaining the constant speed gearbox output at a substantially constant angular velocity, an alternating current generated by the generator may be maintained at a substantially constant frequency.

主权项

1. An integrated auxiliary power unit (“APU”)-generator constant speed drive system comprising:
an auxiliary power unit comprising an engine having a variable frequency rotational output comprising a shaft turning at a non-constant angular velocity; a gearbox connected to the variable frequency rotational output and having a constant speed gearbox output comprising a shaft configured to turn at a constant angular velocity; wherein the gearbox transfers energy from the variable frequency rotational output to the constant speed gearbox output.