Patent ID: 6573626
Filing Date: 2003-06-03
Classification: H02J,Y02B

Abstract:
An apparatus for uninterruptedly supplying power, comprising:an electrical machine including a rotor and being designed and arranged to be operated as a motor and as a generator and to be connected to a load to be supplied with alternating current without a converter having a variable feed frequency being arranged between said electrical machine and the load; coupling units having a variable ratio of transmission and including a differential transmission, said differential transmission including a first input/output shaft, a second input/output shaft and a third input/output shaft; a flywheel being designed and arranged to store kinetic energy and to be connected to said rotor by said coupling units; and control units being designed and arranged for the transmission of said coupling units and including a controllable brake and an electrical auxiliary machine being designed and arranged to be operated as a motor, said electrical auxiliary machine and said controllable brake being designed and arranged to engage said third input/output shaft of said differential transmission, said control units being designed and arranged to keep the number of rotations of said electrical machine constant at least in a certain range of the number of rotations of said flywheel when said electrical machine is operated as a generator by kinetic energy being stored in said flywheel, and said control units being designed and arranged in a way that said electrical auxiliary machine is operated as a motor to reach a desired final number of rotations of said flywheel when said electrical auxiliary machine is operated as a motor and that said electric auxiliary machine is continuously operated as a motor at full speed to maintain the desired final number of rotations of said flywheel as long as said electric auxiliary machine is operated as a motor.