Programmable hardware element pre-regulator

• US 7,684,878 B2
• Filed: 01/08/2007
• Issued: 03/23/2010
• Est. Priority Date: 02/07/2006
• Status: Active Grant

• Current Assignee: National Instruments Corporation (Emerson Electric Company)
• Original Assignee: National Instruments Corporation (Emerson Electric Company)
• Inventors: Castro, Gustavo Jesus, Reindel, Kenneth A., Topala, George C.
• Primary Examiner(s): Vu; Bao Q
• Assistant Examiner(s): Tran; Nguyen
• Application Number:
  US11/620,803
• Publication Number:
  US 20070185590A1
• Time in Patent Office: 1,170 Days
• Field of Search: 700/22, 700/286, 700/297, 700/298, 713/300, 713/320, 713/310, 713/321, 323/241, 323/266, 323/273, 323/283, 323/284, 323/268, 323/269, 323/270, 323/274
• US Class Current: 700/22
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: H02M 1/0012 Control circuits using digital or numerical techniques in DC/DC converters H02M3/157, H02M3/33515; in DC-AC converters H02M7/53873
• CPC Class Codes: H02M 1/0045 Converters combining the concepts of switch-mode regulation and linear regulation, e.g. linear pre-regulator to switching converter, linear and switching converter in parallel, same converter or same transistor operating either in linear or switching mode
• CPC Class Codes: H02M 3/157 with digital control

Abstract

System and method for providing a programmable power supply. The programmable power supply may include a programmable hardware element (PHE) that couples to a power supply (DC-DC converter) and which in turn couples to a linear regulator. The PHE may implement a PID control algorithm that receives a measurement of the output power and may use PID and/or non-linear control to ensure that the power supply and the linear regulator maintain similar power levels. The PHE may be configured based on a graphical program, thus enabling fast and efficient modifications to the programmable power supply.

Claims

1. A programmable power supply system, comprising:

a programmable hardware element (PHE) having an input for receiving a signal specifying a desired output power, wherein the PHE generates a PHE output signal;

a power supply coupled to the PHE configured to receive the PHE output signal from the PHE and generate a power signal;

a linear regulator coupled to receive the power signal output from the power supply;

voltage measurement logic for measuring the power signal output from at least one of the power supply or the linear regulator;

at least one analog to digital converter (ADC) for converting the measured power signal into a digital signal;

wherein the PHE is configured to implement PID (proportional integral derivative) control and non-linear control, wherein the PHE is configured to receive the digital signal and perform at least one of the PID control and the non-linear control to adjust the PHE output signal to maintain stability of the power signal, and wherein the PHE is configured to determine whether to use the PID control or the non-linear control based on the received signal and/or the digital signal.

2. The system of claim 1, wherein the PHE is configured according to a graphical program, wherein the graphical program comprises a plurality of interconnected nodes which visually indicate functionality of the graphical program.

3. The system of claim 1, wherein the PHE acts as a pre-regulator for the linear regulator.

4. The system of claim 1, wherein the power supply receives power from a power source, and wherein the power supply is configured to use the received PHE output signal and the power source to generate the power signal.

5. The system of claim 1, wherein the PHE comprises a field-programmable hardware element (FPGA).

6. The system of claim 1, wherein the PHE comprises a programmable gate array.

7. The system of claim 1, wherein the output signal is usable to minimize power dissipated by the power supply and maximize power delivered by the power supply.

8. The system of claim 1, wherein the PHE is configured to generate the PHE output signal and receive the digital signal a plurality of times to maintain stability of the power signal over time.

9. A method, comprising:

receiving, by a programmable hardware element (PHE), a signal specifying a desired output power;

generating, by the PHE, a PHE output signal;

receiving, by a power supply, the PHE output signal from the PHE;

generating, by the power supply, a power signal;

receiving, by a linear regulator, the power signal output from the power supply;

measuring the power signal output from at least one of the power supply or the linear regulator;

converting the measured power signal into a digital signal;

receiving, by the PHE, the digital signal;

adjusting, by the PHE, the PHE output signal to maintain stability of the power signal using at least one of PID (proportional integral derivative) control or non-linear control, wherein the PHE is configured to implement the PID control and the non-linear control, and wherein the PHE determines whether to use the PID control or the non-linear control based on the received signal and/or the digital signal.

10. The method of claim 9, wherein the PHE is configured according to a graphical program, wherein the graphical program comprises a plurality of interconnected nodes which visually indicate functionality of the graphical program.

11. The method of claim 9, wherein the PHE acts as a pre-regulator for the linear regulator.

12. The method of claim 9, further comprising:

receiving, by the power supply, power from a power source;

wherein the power supply is configured to use the received PHE output signal and the power source to generate the power signal.

13. The method of claim 9, wherein the PHE comprises a field-programmable hardware element (FPGA).

14. The method of claim 9, wherein the PHE comprises a programmable gate array.

15. The method of claim 9, wherein the PHE output signal is usable to minimize power dissipated by the power supply and maximize power delivered by the power supply.

16. The method of claim 9, wherein said generating the PHE output signal and said receiving the digital signal is performed a plurality of times to maintain stability of the power signal over time.