초록 ▼

An electrically-compensated constant speed drive according to the present invention includes a speed summer having first and second input shafts and an output shaft at which constant speed motive power is developed wherein the first input shaft is coupled to a prime mover output shaft. A speed-compe

An electrically-compensated constant speed drive according to the present invention includes a speed summer having first and second input shafts and an output shaft at which constant speed motive power is developed wherein the first input shaft is coupled to a prime mover output shaft. A speed-compensating permanent magnet machine includes a motive power shaft coupled to the second input shaft of the speed summer and electrical power windings. A control permanent magnet machine includes a motive power shaft coupled to either of the first or output shafts of the speed summer and also includes electrical power windings. A power converter interconnects the power windings of the permanent magnet machines and comprises a first bi-directional AC/DC converter coupled to the electrical power windings of one of the permanent magnet machines, a second bi-directional AC/DC converter coupled to the electrical power windings of the other of the permanent magnet machines, a bi-directional DC/DC converter coupled between the AC/DC converters and a circuit for controlling the converters whereby the speed compensating permanent magnet machine develops compensating speed of a magnitude and direction sufficient to maintain the speed summer output shaft at the desired speed.

대표청구항 ▼

An electrically-compensated constant speed drive (CSD) for developing constant speed motive power from variable speed motive power developed at an output shaft of a prime mover, comprising: a speed summer having first and second input shafts and an output shaft at which the constant speed motive pow

An electrically-compensated constant speed drive (CSD) for developing constant speed motive power from variable speed motive power developed at an output shaft of a prime mover, comprising: a speed summer having first and second input shafts and an output shaft at which the constant speed motive power is developed, the first input shaft being coupled to the prime mover output shaft; a speed-compensating permanent magnet machine having a motive power shaft coupled to the second input shaft of the speed summer and electrical power windings; a control permanent magnet machine having a motive power shaft coupled to either of the first and output shafts of the speed summer and also having electrical power windings; a first bi-directional AC/DC converter coupled to the electrical power windings of one of the permanent magnet machines; a second bi-directional AC/DC converter coupled to the electrical power windings of the other of the permanent magnet machines; a bi-directional DC/DC converter coupled between the AC/DC converters; and means for controlling the AC/DC converters and the DC/DC converter whereby electrical power is transferred between the permanent machines so that the speed-compensating permanent magnet machine develops compensating speed of a magnitude and direction sufficient to maintain the speed summer output shaft at the desired speed.