US5656923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A DC power supply controller
Assignee: Massachusetts Institute of Technology
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Filing: 1995-04-10
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Granted: 1997-08-12
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Expires: 2015-04-10
Abstract
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.
Inventors
- 👤 Aaron M. Schultz
- 👤 Steven B. Leeb
- 👤 Ahmed Mitwalli
- 👤 George C. Varghese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:53
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H02M1/4208; H02M1/4225; H02J; H02J50/00; H02J50/10; H02J50/80; H02J7/00; H02J7/02; H02J2207/00; H02J2207/20; Y; Y02; Y02B; Y02B40/00; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
112 words
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.
Claim 2
Dependent Claim
112 words
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.
Claim 3
Dependent Claim
21 words
A power supply controller as in claim 1 wherein; the voltage controller operates as a unit delay for the current controller.
Claim 4
Dependent Claim
24 words
A power supply controller as in claim 1 wherein: the load includes a battery; and the power supply controller functions to recharge the battery.
Claim 5
Dependent Claim
31 words
A power supply controller as in claim 3, wherein: the battery is integrated within an electrically-powered car; and the connection between the power supply and the battery is an inductive coupling.
Claim 6
Dependent Claim
20 words
A power supply controller as in claim 1, wherein: the large-signal voltage controller is a feedforward and a proportional-integral controller.
Claim 7
Dependent Claim
19 words
A power supply controller as in claim 1, wherein: the current controller includes: a multiplying digital to analog converter.
Claim 8
Dependent Claim
48 words
A power supply controller as in claim 1, further comprising: a load temperature sensor outputting a load temperature; at least one of the large-signal voltage controller and the current controller controlling one of voltage and current, respectively, to the load also as a function of the load temperature.
Claim 9
Dependent Claim
142 words
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 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.
Claim 10
Dependent Claim
142 words
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 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.
Claim 11
Dependent Claim
159 words
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 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 V 2 ; a squarer for squaring a reference voltage to form V 2 ; difference means for forming a difference Δv between V 2 and v 2 ; first scaling means for scaling the difference Δv to form a scaled difference; integrator means for integrating the difference Δv to form an integrated difference; and an 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.
Claim 12
Dependent Claim
159 words
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 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 V 2 ; a squarer for squaring a reference voltage to form V 2 ; difference means for forming a difference Δv between V 2 and v 2 ; first scaling means for scaling the difference Δv to form a scaled difference; integrator means for integrating the difference Δv to form an integrated difference; and an 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.
Claim 13
Dependent Claim
22 words
A power supply controller as in claim 9, wherein: the voltage controller forms a control command k -- tilde[n] according to ##EQU9##
Claim 14
Dependent Claim
117 words
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: feedback means for determining an error Δs between a first feedback parameter s from the load and a reference value S corresponding to the first feedback parameter s the error Δs being determined as a function of a square v 2 of the load voltage and a square V 2 of a reference voltage; and final command means for determining a control command as a function of the error Δs and at least one feedforward parameter which includes scaled power to the load.
Claim 15
Dependent Claim
117 words
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: feedback means for determining an error Δs between a first feedback parameter s from the load and a reference value S corresponding to the first feedback parameter s the error Δs being determined as a function of a square v 2 of the load voltage and a square V 2 of a reference voltage; and final command means for determining a control command as a function of the error Δs and at least one feedforward parameter which includes scaled power to the load.
Claim 16
Dependent Claim
42 words
A large signal voltage controller as in claim 11, further comprising: a load temperature sensor for sensing load temperature; the final control means determining the control command as a function of the error Δs and the feedforward load power and load temperature.
Claim 17
Dependent Claim
95 words
A large signal voltage controller as in claim 11, wherein the feedback means includes: a first squarer for squaring the load voltage to form v 2 ; a squarer for squaring of the reference voltage V 2 ; difference means for forming a difference Δv between V 2 and v 2 ; first scaling means for scaling the difference Δv to form a scaled difference; integrator means for integrating the difference Δv to form an integrated difference; and an adder for adding the scaled difference and the integrated difference to form the first control command.
Claim 18
Dependent Claim
23 words
A large signal voltage controller as in claim 13, wherein: the feedback means forms the control command k -- tilde[n] according to ##EQU10##
Claim 19
Dependent Claim
22 words
A large-signal voltage controller as in claim 11, wherein: the load includes a battery; and the controller functions to recharge the battery.
Claim 20
Dependent Claim
31 words
A large-signal voltage controller as in claim 15, wherein: the battery is integrated within an electrically-powered car; and the connection between the power supply and the battery is an inductively coupling.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |