Electricity: motive power systems – With particular motor-driven load device – Power- or motion-transmitting mechanism
Patent
1990-03-05
1991-05-28
Ro, Bentsu
Electricity: motive power systems
With particular motor-driven load device
Power- or motion-transmitting mechanism
318 15, 318 46, 318 72, 318102, 318 8, 310112, H02K 1734
Patent
active
050197550
ABSTRACT:
An electric motor drive system having a first electric motor, a first drive shaft to which the first electric motor is coupled, a second electric motor having a higher power rating than the first, a second drive shaft to which the second electric motor is coupled, an epicyclic gear system comprising a sun gear to which the first drive shaft is coupled, a ring gear to which the second drive shaft is coupled, and planetary gears meshing with both the sun gear and the ring gear, an output drive coupled to the planetary gears, and, a one-way rotation restraining means coupled to the second shaft to permit rotation of the second shaft in one direction and to prevent rotation of the second shaft in the other direction for restraining motion of the second shaft during start up of the first motor, and a one-way rotation restraining means coupled to the first drive shaft for restraining rotation of the first shaft during start up of the second motor, and clutch means operable to interconnect said first and second motors, durhg starting of one of said motor, to cause initial rotation of the other of said motors, and a method of operating such an electric motor drive system.
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