TORSIONAL MODE DAMPING APPARATUS
First Claim
1. A torsional-mode damping system to reduce a torque component at a critical frequency in an output torque of a compression train including a compressor, a gas turbine connected to the compressor by a shaft, and an electric motor connected to the compressor by a geared shaft, the torsional-mode damping system comprising:
- a torque sensor configured to generate a torque signal based on a measurement of a torque of the geared shaft;
a torsional damper connected to the torque sensor, the torsional damper being configured to generate a torque-correcting signal based on the torque signal from the torque sensor;
a VFD controller connected to the torsional damper, the VFD controller being configured to generate VFD signals modified by the torque-correcting signal from the torsional damper; and
a VFD converter connected to the VFD controller, the VFD converter being configured to control an electric power supplied to the electric motor based on the VFD signals generated by the VFD controller, wherein the VFD signals modified by the torque-correcting signal are configured to dampen torsional vibrations at a natural frequency of the compression train.
3 Assignments
0 Petitions
Accused Products
Abstract
A torsional-mode damping system includes a torque sensor, a torsional damper connected to the torque sensor, a VFD controller connected to the torsional damper, and a VFD converter connected to the VFD controller, the VFD converter being configured to control an electric power supplied to the electric motor based on VFD signals generated by the VFD controller, the VFD signals being modified by a torque-correcting signal so as to dampen torsional vibrations at a natural frequency of a compression train.
-
Citations
20 Claims
-
1. A torsional-mode damping system to reduce a torque component at a critical frequency in an output torque of a compression train including a compressor, a gas turbine connected to the compressor by a shaft, and an electric motor connected to the compressor by a geared shaft, the torsional-mode damping system comprising:
-
a torque sensor configured to generate a torque signal based on a measurement of a torque of the geared shaft; a torsional damper connected to the torque sensor, the torsional damper being configured to generate a torque-correcting signal based on the torque signal from the torque sensor; a VFD controller connected to the torsional damper, the VFD controller being configured to generate VFD signals modified by the torque-correcting signal from the torsional damper; and a VFD converter connected to the VFD controller, the VFD converter being configured to control an electric power supplied to the electric motor based on the VFD signals generated by the VFD controller, wherein the VFD signals modified by the torque-correcting signal are configured to dampen torsional vibrations at a natural frequency of the compression train. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A compression train, comprising:
-
a compressor coupled to a gear box; a turbine connected to the compressor by a shaft; an electric motor connected to the compressor by a shaft coupled to the gear box; a torque sensor configured to generate a torque signal based on a measurement of a torque of the shaft coupled to the gear box; a VFD converter configured to control an electric power supplied to the electric motor; and a VFD controller connected to the VFD converter, the VFD controller being configured to generate VFD signals to drive the VFD converter, the VFD controller further comprising a torsional damper connected to the torque sensor, the torsional damper being configured to generate a torque-correcting signal based on the torque signal from the torque sensor, wherein the VFD signals are modified by the torque-correcting signal from the torsional damper so as to dampen torsional vibrations at a natural frequency of the compression train. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification