An arrangement and method for driving a turbomachine having a rotor is provided. The arrangement includes an input shaft rotationally coupled to the rotor. A motor generator device has a motor mode of operation and a generator mode of operation. A differential gear device having a first portion rota
An arrangement and method for driving a turbomachine having a rotor is provided. The arrangement includes an input shaft rotationally coupled to the rotor. A motor generator device has a motor mode of operation and a generator mode of operation. A differential gear device having a first portion rotationally coupled to the input shaft and a second portion rotationally coupled to the motor generator device. A hydraulic assembly is rotationally coupled between the differential gear and the input shaft. The hydraulic assembly has a plurality of pistons and a pair of wobbler plates. A controller is operably coupled to the input shaft, the motor generator device and the hydraulic assembly, wherein the controller includes a processor that is responsive to executable instructions when executed on the processor for moving the pair of wobbler plates to a first position during a motor mode of operation.
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1. An arrangement for driving a turbomachine having a rotor, the arrangement comprising: an input shaft rotationally coupled to the rotor;a motor generator device, the motor generator device having a motor mode of operation and a generator mode of operation;a differential gear device having a first
1. An arrangement for driving a turbomachine having a rotor, the arrangement comprising: an input shaft rotationally coupled to the rotor;a motor generator device, the motor generator device having a motor mode of operation and a generator mode of operation;a differential gear device having a first portion rotationally and directly coupled to the input shaft and a second portion rotationally and directly coupled to the motor generator device;a hydraulic assembly having a third portion rotationally and directly coupled to the first portion opposite the motor generator device and a fourth portion rotationally and directly coupled to the second portion opposite the motor generator device, the hydraulic assembly having a plurality of pistons and a pair of wobbler plates coupled between the third portion and the fourth portion, the pair of wobbler plates being in a first position in the motor mode of operation, wherein the first position provides a maximum piston displacement in the plurality of pistons, wherein one of the pair of wobbler plates is configured to move to a second position during the motor mode of operation to limit a hydraulic pressure within the hydraulic assembly;wherein the pair of wobbler plates includes a first wobbler plate and a second wobbler plate, the first wobbler plate being configured to adjust a stroke of the first plurality of pistons and the second wobbler plate being configured to adjust the stroke of the second plurality of pistons; anda controller operably coupled to the input shaft, the motor generator device and the hydraulic assembly, wherein the controller includes a processor that is responsive to executable instructions when executed on the processor for moving the second wobbler plate to reduce a displacement of the second plurality of pistons to limit pressure levels within the hydraulic assembly. 2. The arrangement of claim 1 wherein the controller is further responsive to executable instructions for adjusting a position of the first wobbler plate and the second wobbler plate to adjust a rotational input from the input shaft to provide rotational output that drives the motor generator device when the motor generator device is in the generator mode of operation. 3. The arrangement of claim 2 wherein the first wobbler plate and the second wobbler plate are adjusted to maintain an output rotational speed of the second portion at a substantially constant rotational speed when the motor generator device is in the generator mode of operation. 4. A gas turbine engine comprising: a compressor rotor;an input shaft rotationally coupled to the compressor rotor;a motor generator device, the motor generator device having a motor mode of operation and a generator mode of operation;a hydraulic assembly having a first portion rotationally coupled to the input shaft and a second portion rotationally coupled to the motor generator device, the hydraulic assembly having a plurality of pistons and a pair of wobbler plates operably coupled between the first portion and the second portion, the pair of wobbler plates being in a first position in the motor mode of operation;a differential gear device coupled to the input shaft and operably disposed between the motor generator device and the hydraulic assembly, the differential gear device having a third portion rotationally coupled between the input shaft and the first portion, the differential gear device further having a fourth portion rotationally coupled between the second portion and the motor generator device;wherein the second portion includes a shaft operably coupled to the plurality of pistons and a first gear disposed on an end of the shaft, and the differential gear device includes a ring gear rotationally coupled between the first gear and the motor generator device;wherein the plurality of pistons includes a first plurality of pistons and a second plurality of pistons;wherein the pair of wobbler plates includes a first wobbler plate and a second wobbler plate, the first wobbler plate being configured to adjust a stroke of the first plurality of pistons and the second wobbler plate being configures to adjust the stroke of the second plurality of pistons; anda controller operably coupled to the input shaft, the motor generator device and the hydraulic assembly, wherein the controller includes a processor that is responsive to executable instructions when executed on the processor for moving the second wobbler plate to reduce a displacement of the second plurality of pistons to limit pressure levels within the hydraulic assembly. 5. The gas turbine engine of claim 4 wherein the controller is further responsive to executable instructions for adjusting a position of the first wobbler plate and the second wobbler plate to adjust a rotational input from the input shaft to provide rotational output that drives the motor generator device when the motor generator device is in the generator mode of operation. 6. The gas turbine engine of claim 5 wherein the first wobbler plate and the second wobbler plate are adjusted to maintain an output rotational speed of the second portion at a substantially constant rotational speed when the motor generator device is in the generator mode of operation. 7. A method of driving components within a turbomachine having a rotor, the method comprising: providing an input shaft that is rotationally coupled to the rotor;providing a motor generator device having a motor mode of operation and a generator mode of operation;providing a hydraulic assembly rotationally coupled between the input shaft and the motor generator device, the hydraulic assembly having a plurality of pistons operably coupled to a pair of wobbler plates, wherein the plurality of pistons and the pair of wobbler plates are configured to transfer rotational energy between the input shaft and the motor generator device, the plurality of pistons includes a first plurality of pistons and a second plurality of pistons, and the pair of wobbler plates includes a first wobbler plate and a second wobbler plate, the first wobbler plate being configured to adjust a stroke of the first plurality of pistons and the second wobbler plate being configured to adjust the stroke of the second plurality of pistons;providing a controller operably coupled to the input shaft, the motor generator device and the hydraulic assembly;moving the pair of wobbler plates to a first position during a first period of the motor mode of operation, wherein the first position provides a maximum displacement in the plurality of pistons; and,moving one of the pair of wobbler plates to a second position during a second period of the motor mode of operation to limit a hydraulic pressure within the hydraulic assembly;moving the second wobbler plate, in response to a signal from the controller, to reduce a displacement of the second plurality of pistons to limit pressure levels within the hydraulic assembly. 8. The method of claim 7 wherein the first position provides a maximum piston displacement in the plurality of pistons, and the second position limits a hydraulic pressure within the hydraulic assembly below a threshold. 9. The method of claim 7 further comprising providing a differential gear rotationally coupled to the input shaft, the hydraulic assembly and the motor generator device. 10. The method of claim 9 wherein: the hydraulic assembly includes a shaft rotationally coupled to the plurality of pistons on a first end, the shaft having a first gear on a second end;the motor generator device includes a second gear; and,the differential gear includes a ring gear coupled to the first gear and the second gear.
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이 특허에 인용된 특허 (13)
Bueche Gerard H. ; Reinecke Mark, Air turbine with power controller having operation independent of temperature.
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