Apparatus and system for power conversion
First Claim
1. An apparatus comprising:
- a DC-link;
a load coupled to the DC-link; and
an energy conversion system comprising;
a first energy storage device;
a first voltage converter coupled to the first energy storage device and to the DC-link, the first voltage converter configured to;
convert a first DC voltage from the first energy storage device into a second DC voltage based on a command signal and based on a first adjustment signal; and
supply the second DC voltage to the DC-link;
a first bus voltage controller coupled to the DC-link and to the first voltage converter, the first bus voltage controller configured to;
iterate calculation of the first adjustment signal based on the command signal and based on a measured voltage of the DC-link; and
communicate each iterated calculation of the first adjustment signal to the first voltage converter;
a supervisory controller coupled to the first voltage converter and to the first bus voltage controller, the supervisory controller configured to;
iterate calculation of the command signal based on the load and based on a desired DC-link voltage for the load; and
communicate each iterated calculation of the command signal to the first voltage converter and to the first bus voltage controller; and
wherein a frequency of the first bus voltage controller to communicate each iterated calculation of the first adjustment signal is higher than a frequency of the supervisory controller to communicate each iterated calculation of the command signal.
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Accused Products
Abstract
An apparatus includes a DC-link, a voltage converter, a bus voltage controller, and a supervisory controller. The voltage converter is configured to convert a first DC voltage into a second DC voltage based on a command signal and based on an adjustment signal and to supply the second DC voltage to the DC-link. The bus voltage controller is configured to iterate calculation of the adjustment signal to communicate each iterated calculation of the adjustment signal to the voltage converter. The supervisory controller is configured to iterate calculation of the command signal and to communicate each iterated calculation of the command signal to the voltage converter and to the bus voltage controller. A frequency of the bus voltage controller to communicate each iterated calculation of the adjustment signal is higher than a frequency of the supervisory controller to communicate each iterated calculation of the command signal.
28 Citations
20 Claims
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1. An apparatus comprising:
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a DC-link; a load coupled to the DC-link; and an energy conversion system comprising; a first energy storage device; a first voltage converter coupled to the first energy storage device and to the DC-link, the first voltage converter configured to; convert a first DC voltage from the first energy storage device into a second DC voltage based on a command signal and based on a first adjustment signal; and supply the second DC voltage to the DC-link; a first bus voltage controller coupled to the DC-link and to the first voltage converter, the first bus voltage controller configured to; iterate calculation of the first adjustment signal based on the command signal and based on a measured voltage of the DC-link; and communicate each iterated calculation of the first adjustment signal to the first voltage converter; a supervisory controller coupled to the first voltage converter and to the first bus voltage controller, the supervisory controller configured to; iterate calculation of the command signal based on the load and based on a desired DC-link voltage for the load; and communicate each iterated calculation of the command signal to the first voltage converter and to the first bus voltage controller; and wherein a frequency of the first bus voltage controller to communicate each iterated calculation of the first adjustment signal is higher than a frequency of the supervisory controller to communicate each iterated calculation of the command signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a voltage bus; a load coupled to the voltage bus; a voltage converter coupled to the voltage bus and to an energy storage device;
the voltage converter configured to convert energy from the energy storage device into a voltage bus voltage;a supervisory controller coupled to the voltage bus and to the voltage converter, the supervisory controller programmed to iteratively; determine a desired voltage bus voltage based on the load; and calculate a control signal based on the desired voltage bus voltage, the control signal configured to cause the voltage converter to convert the energy from the energy storage device into the voltage bus voltage; a voltage bus controller coupled to the voltage bus, to the voltage converter, and to the supervisory controller, the voltage bus controller programmed to; receive the voltage feedback from the voltage bus; receive the control signal from the supervisory controller; calculate the desired voltage bus voltage based on the control signal; determine if the voltage feedback is within the threshold of the desired voltage bus voltage; and if the voltage feedback is outside of the threshold of the desired voltage bus voltage, calculate a regulatory setpoint signal based on the voltage feedback and based on the desired voltage bus voltage, the regulatory setpoint signal configured to cause the voltage converter to adjust the conversion of the energy from the energy storage device such that the voltage on the voltage bus voltage is within the threshold; and wherein a bandwidth of the voltage bus controller to receive the voltage feedback and calculate the regulatory setpoint signal is higher than a bandwidth of the supervisory controller to iteratively receive the voltage feedback and calculate the control signal. - View Dependent Claims (12, 13, 14, 15)
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16. A system comprising:
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a DC-link; a voltage inverter coupled to the DC-link and configured to convert a DC voltage from the DC-link into a first AC voltage; an electromechanical device coupled to the voltage inverter and configured to convert the first AC voltage into a mechanical output; and an energy conversion system comprising; a plurality of energy storage devices configured to store DC energy; a plurality of voltage converters, each voltage converter coupled to a respective energy storage device and configured to; convert a stored voltage from the respective energy storage device into a DC supply voltage based on a setpoint signal; and supply the DC supply voltage to the DC-link; a power management controller coupled to the plurality of voltage converters and configured to iteratively; calculate the setpoint signal based on a target voltage for the DC-link; and supply the setpoint signal to the plurality of voltage converters; a first DC-link voltage controller coupled to a first voltage converter of the plurality of voltage converters and to the power management controller, wherein the first DC-link voltage controller is configured to iteratively; determine the target voltage based on the setpoint signal; calculate a first adjustment signal based on a difference between the target voltage and the DC supply voltage; and supply the first adjustment signal to the first voltage converter, wherein the first voltage converter is further configured to convert the stored voltage based on the first adjustment signal; and wherein a frequency of the power management controller to iteratively calculate the setpoint signal and supply the setpoint signal to the plurality of voltage converters is lower than a frequency of the first DC-link voltage controller to calculate and supply the first adjustment signal to the first voltage converter. - View Dependent Claims (17, 18, 19, 20)
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Specification