초록

An electrically compensated constant speed drive includes controllable gear boxes in the speed compensation link of the drive which permit the overall speed ranges of the permanent magnet machines to be controlled, thus leading to a desirable decrease in size and weight of the machines.

대표청구항 ▼

In a constant speed drive of the type including a differential having a first input shaft coupled to an output shaft of a prime mover, a second input shaft and an output shaft coupled to a generator and a speed compensation link coupled between the prime mover and the second differential input shaft

In a constant speed drive of the type including a differential having a first input shaft coupled to an output shaft of a prime mover, a second input shaft and an output shaft coupled to a generator and a speed compensation link coupled between the prime mover and the second differential input shaft wherein the speed compensation link includes first and second rotary power converters having interconnected power paths and motive power shafts and wherein the drive is operable in a generating mode to convert variable-speed motive power supplied by the prime mover into constant-speed motive power for the generator and in a starting mode to bring the prime mover up to self-sustaining speed, the improvement comprising: first and second speed multipliers coupled between the motive power shaft of the first rotary power converter and either of the prime mover and the differential output shafts and between the motive power shaft of the second rotary power converter and the differential second input shaft, respectively, wherein at least one of the speed multipliers has a variable speed ratio which is established at different values in the generating and starting modes.