Electric drive power response management system and method
First Claim
1. A method of managing power generation response within an electric drive system, the electric drive system including a fuel-driven prime mover for driving an electrical power alternator controlled at least in part by an excitation voltage, the electrical power alternator making electrical power available on a DC link having a voltage characteristic and a current characteristic, the method comprising:
- determining a voltage of the DC link;
determining a torque command by an operator of the electric drive system;
deriving a mechanical power that is being commanded based on the torque command;
determining a desired voltage of the DC link based on the derived mechanical power;
providing an excitation voltage command signal to the electrical power alternator based on the desired voltage of the DC link by use of a closed loop controller, wherein the excitation voltage command signal is determined based on a difference value between the voltage of the DC link and the desired voltage of the DC link; and
applying an excitation field to the electrical power alternator based on the excitation voltage command signal.
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Accused Products
Abstract
An electric drive system includes a fuel-driven prime mover for driving an electrical power alternator controlled at least in part by an excitation voltage is disclosed. The electrical power alternator makes electrical power available on a DC link having a voltage characteristic and a current characteristic. A method for managing the response of the alternator includes determining a voltage of the DC link and a torque command by an operator. The torque command is used to derive a mechanical power that is being commanded. A desired voltage of the DC link is determined based on the derived mechanical power, and an excitation voltage command signal is provided based on the desired voltage of the DC link by use of a closed loop controller. An actual excitation voltage is applied to the electrical power alternator based on the excitation voltage command signal.
162 Citations
19 Claims
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1. A method of managing power generation response within an electric drive system, the electric drive system including a fuel-driven prime mover for driving an electrical power alternator controlled at least in part by an excitation voltage, the electrical power alternator making electrical power available on a DC link having a voltage characteristic and a current characteristic, the method comprising:
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determining a voltage of the DC link; determining a torque command by an operator of the electric drive system; deriving a mechanical power that is being commanded based on the torque command; determining a desired voltage of the DC link based on the derived mechanical power;
providing an excitation voltage command signal to the electrical power alternator based on the desired voltage of the DC link by use of a closed loop controller, wherein the excitation voltage command signal is determined based on a difference value between the voltage of the DC link and the desired voltage of the DC link; andapplying an excitation field to the electrical power alternator based on the excitation voltage command signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A controller for managing power generation response within an electric drive system, the electric drive system including a fuel-driven prime mover for driving an electrical power alternator controlled at least in part by an excitation voltage, the electrical power alternator making electrical power available on a DC link having a voltage characteristic and a current characteristic, the controller including computer-executable instructions on a computer-readable medium, the computer-executable instructions comprising:
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instructions for determining a voltage of the DC link; instructions for determining a torque command by an operator of the electric drive system; instructions for deriving a mechanical power that is being commanded based on the torque command; instructions for determining a desired voltage of the DC link based on the derived mechanical power; instructions for providing an excitation voltage command signal to the electrical power alternator based on the desired voltage of the DC link by use of a closed loop controller, wherein the excitation voltage command signal is determined based on a difference value between the voltage of the DC link and the desired voltage of the DC link; and instructions for applying an excitation field to the electrical power alternator based on the excitation voltage command signal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A non-transitory computer-readable medium having thereon computer-executable instructions for managing power generation response within an electric drive system, the electric drive system including a fuel-driven prime mover for driving an electrical power alternator controlled at least in part by an excitation voltage, the electrical power alternator making electrical power available on a DC link having a voltage characteristic and current a characteristic, a controller including the computer-executable instructions on the non-transitory computer-readable medium, the computer-executable instructions comprising:
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instructions for determining a voltage of the DC link; instructions for determining a torque command by an operator of the electric drive system; instructions for deriving a mechanical power that is being commanded based on the torque command; instructions for determining a desired voltage of the DC link based on the derived mechanical power; instructions for providing an excitation voltage command signal to the electrical power alternator based on the desired voltage of the DC link by use of a closed loop controller, wherein the excitation voltage command signal is determined based on a difference value between the voltage of the DC link and the desired voltage of the DC link; and instructions for applying an excitation field to the electrical power alternator based on the excitation voltage command signal. - View Dependent Claims (17, 18, 19)
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Specification