Turbogenerator/motor control system
First Claim
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1. A method of controlling a permanent magnet turbogenerator/motor comprising the steps of:
- providing electrical power to the permanent magnet turbogenerator/motor through a pulse width modulated inverter to start the permanent magnet turbogenerator/motor to achieve self-sustaining operation;
disconnecting the electrical power from the pulse width modulated inverter once self-sustaining operation is achieved;
reconfiguring the pulse width modulated inverter to supply voltage from the permanent magnet turbogenerator/motor; and
maintaining the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying voltage.
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Abstract
A turbogenerator/motor control system having a plurality of proportional integral control loops including a fuel command control loop and a current command control loop. The exhaust gas temperature of the gas turbine of the turbogenerator/motor is maintained at a constant value with stability is achieved by varying the sampling times of the different proportional integral controls within the control loops.
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Citations
25 Claims
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1. A method of controlling a permanent magnet turbogenerator/motor comprising the steps of:
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providing electrical power to the permanent magnet turbogenerator/motor through a pulse width modulated inverter to start the permanent magnet turbogenerator/motor to achieve self-sustaining operation; disconnecting the electrical power from the pulse width modulated inverter once self-sustaining operation is achieved; reconfiguring the pulse width modulated inverter to supply voltage from the permanent magnet turbogenerator/motor; and maintaining the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying voltage.
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2. A method of controlling a permanent magnet turbogenerator/motor comprising the steps of:
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providing electrical power to the permanent magnet turbogenerator/motor through a pulse width modulated inverter to drive the permanent magnet turbogenerator/motor as a motor to accelerate the gas turbine engine of the permanent magnet turbogenerator/motor; providing spark and fuel to the gas turbine engine of the permanent magnet turbogenerator/motor during this acceleration to achieve self-sustaining operation of the gas turbine engine; disconnecting the electrical power from the pulse width modulated inverter once self-sustaining operation is achieved; reconnecting the pulse width modulated inverter to the permanent magnet turbogenerator/motor through a rectifier bridge to reconfigure the pulse width modulated inverter to supply utility frequency voltage; and maintaining the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage.
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3. A controller for a permanent magnet turbogenerator/motor, comprising:
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a pulse width modulated inverter operably associated with said permanent magnet turbogenerator/motor; means to provide electrical power to said permanent magnet turbogenerator/motor through said pulse width modulated inverter to start said permanent magnet turbogenerator/motor to achieve self sustaining operation; means to disconnect the electrical power from said pulse width modulated inverter once self-sustaining operation of said permanent magnet turbogenerator/motor is achieved; means to reconfigure said pulse width modulated inverter to supply voltage from said permanent magnet turbogenerator/motor; and means to maintain the exhaust gas temperature from said permanent magnet turbogenerator/motor at a substantially constant value while supplying voltage.
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4. A controller for a permanent magnet turbogenerator/motor having a gas turbine engine, comprising:
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a pulse width modulated inverter operably associated with said permanent magnet turbogenerator/motor; means to provide electrical power to said permanent magnet turbogenerator/motor through said pulse width modulated inverter to drive said permanent magnet turbogenerator/motor as a motor to accelerate said gas turbine engine of said permanent magnet turbogenerator/motor; means to provide spark and fuel to said gas turbine engine of said permanent magnet turbogenerator/motor during this acceleration to achieve self sustaining operation of said gas turbine engine; means to disconnect the electrical power from said pulse width modulated inverter and said permanent magnet turbogenerator/motor once self-sustaining operation of said gas turbine engine is achieved; a rectifier bridge operably associated with said pulse width modulated inverter and said permanent magnet turbogenerator/motor; means to reconnect said pulse width modulated inverter to said permanent magnet turbogenerator/motor through said rectifier bridge to reconfigure said pulse width modulated inverter to supply utility frequency voltage; and means to maintain the exhaust gas temperature from said gas turbine engine of said permanent magnet turbogenerator/motor at a substantially constant value while supplying utility frequency voltage. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification