A DC power supply controller
First Claim
1. A large signal substantially unity power-factor controller for controlling a power supply, the power supply supplying a load thereto, comprising:
- a large-signal feedforward digital voltage controller operating in a discrete time frame of units of n for controlling voltage output to the load which is resistive and at least one of inductive and capacitive, the voltage controller converging in Q*n cycles, where Q is an integer and Q≧
2; and
a current controller, operatively connected to the voltage controller, for controlling current output to the load operating in a discrete-time frame of units of N, where N=Q*n.a feedforward parameter of the voltage controller being a function of scaled power to the load.
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Abstract
A large signal, linear, digital, unity power-factor controller for controlling a power supply is disclosed. The power supply controller includes a voltage controller and a current controller. The voltage controller is a feed forward and proportional-integral type of controller. By determining the control command of the voltage controller as a function of the feed forward load power, the power term in the state equations for the voltage controller is eliminated. As such, the current controller operates in time domain in such a way that the voltage controller appears as a unit time delay to the current controller. The load is a battery incorporated within an electrically-powered vehicle. The controller operates to charge the battery. The connection between the battery and the power supply being controlled is an inductive coupling.
50 Citations
16 Claims
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1. A large signal substantially unity power-factor controller for controlling a power supply, the power supply supplying a load thereto, comprising:
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a large-signal feedforward digital voltage controller operating in a discrete time frame of units of n for controlling voltage output to the load which is resistive and at least one of inductive and capacitive, the voltage controller converging in Q*n cycles, where Q is an integer and Q≧
2; anda current controller, operatively connected to the voltage controller, for controlling current output to the load operating in a discrete-time frame of units of N, where N=Q*n. a feedforward parameter of the voltage controller being a function of scaled power to the load. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A large signal substantially unity power-factor controller for controlling a power supply, the power supply supplying a load thereto, comprising:
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a large-signal feedforward digital voltage controller for controlling voltage output to the load which is resistive and at least one of inductive and capacitive; and a current controller, operatively connected to the voltage controller, for controlling current output to the load operating in a discrete-time frame of units of N, where N=Q*n whereby; the load draws a large signal range from the power supply controller; and the voltage controller includes; a resolution mapping means, responsive to the large signal range drawn by the load, for selectively digitizing a small range of the large signal range; and a programmed microprocessor for selectively using one of an output of the resolution mapping means and a predetermined saturation value to determine a voltage control command.
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9. A large signal substantially unity power-factor controller for controlling a power supply, the power supply supplying a load thereto, comprising:
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a large-signal feedforward digital voltage controller for controlling voltage output to the load which is resistive and at least one of inductive and capacitive the voltage controller including; a first squarer for squaring voltage on the load to form V2 ; a squarer for squaring a reference voltage to form V2 ; difference means for forming a difference Δ
v between V2 and v2 ;first scaling means for scaling the difference Δ
v to form a scaled difference;integrator means for integrating the difference Δ
v to form an integrated difference; andan adder for adding the scaled difference and the integrated difference to form the first control command; and a current controller, operatively connected to the voltage controller, for controlling current output to the load operating in a discrete-time frame of units of N, where N=Q*n. - View Dependent Claims (10)
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11. A large signal voltage controller for controlling a power supply, the power supply supplying a load voltage and load current to a load being resistive and at least one of inductive and capacitive comprising:
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feedback means for determining an error Δ
s between a first feedback parameter s from the load and a reference value S corresponding to the first feedback parameter s the error Δ
s being determined as a function of a square v2 of the load voltage and a square V2 of a reference voltage; andfinal command means for determining a control command as a function of the error Δ
s and at least one feedforward parameter which includes scaled power to the load. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification