High frequency square-wave power distribution system

• US 9,030,843 B1
• Filed: 05/21/2012
• Issued: 05/12/2015
• Est. Priority Date: 02/12/2010
• Status: Expired due to Fees

• Current Assignee: Edward Herbert
• Original Assignee: Edward Herbert
• Inventors: Herbert, Edward
• Primary Examiner(s): Han, Jessica
• Assistant Examiner(s): ROSARIO BENITEZ, GUSTAVO A
• Application Number:
  US13/476,952
• Time in Patent Office: 1,086 Days
• Field of Search: 363/17, 363/15, 363/21.02, 363/21.05, 363/21.06, 363/21.13, 363/2, 363/1.14, 363/84, 363/89, 363/127, 307106-108
• US Class Current: 363/17
• CPC Class Codes: H02J 1/10 Parallel operation of dc sources
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02M 3/33561 having more than one ouput with independent control
• CPC Class Codes: H02M 3/33592 having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A minimalized power converter has a square-wave voltage source operating at 100 percent duty-ratio, a series inductance and a rectifier. A high frequency square-wave power distribution system comprises a plurality of minimalized power converters connected by a common ac power distribution link. Because the ac power distribution link carries current at a high frequency, the square-wave may be degraded by the stray inductance with distance. Re-squaring circuits along the length of the ac power distribution link operating synchronously restore and preserve the integrity of the square-wave. The minimalized power converter is very flexible and has very fast dynamic response, being able to make very fast controlled current transitions from any current to any other current, including zero or current reversal (same voltage, opposite current flow).

Claims

1. A high frequency square-wave power distribution system comprising,

a square-wave voltage source for producing a square-wave voltage,

the square-wave voltage having a first regular transition time T1 from a positive voltage to a negative voltage and having a second regular transition time T2 from a negative voltage to a positive voltage,

an ac power distribution link connecting the square-wave voltage source to a rectifier having a dc output for producing a dc output voltage, the rectifier having a third regular switching time T3 from a positive conducting state to a negative conducting state and

having a fourth regular switching time T4 from a negative conducting state to a positive conducting state

a series inductor in series in the ac power distribution link,

the series inductor conducting an inductor current,

an output capacitor connected to the dc output of the rectifier,

a control means responsive to a voltage feedback from the dc output for controlling a duration of an offset time (t) equal to the time difference between the first regular transition time T1 of the square wave voltage and the third regular switching time T3 of the rectifier,

and also equal to the time difference between the second regular transition time T2 of the square wave voltage and the fourth regular switching time T4 of the rectifier,

the duration of the offset time (t) thereby controlling the inductor current through the series inductor in response to variations of the dc output voltage.

2. The high frequency square-wave power distribution system of claim 1 wherein the square-wave input voltage source is a dc voltage source and a full-bridge switch.

3. The high frequency square-wave power distribution system of claim 1 further comprising a series transformer in series in the ac power distribution link.

4. The high frequency square-wave power distribution system of claim 2 further comprising a series transformer in series in the ac power distribution link.

5. A converter high frequency square-wave power distribution system comprising at least a first square-wave input voltage source for producing at least a first square-wave input voltage, the at least first square-wave input voltage having at least a first regular transition time T1 from a positive voltage to a negative voltage and having at least a second regular transition time T2 from a negative voltage to a positive voltage, an ac power distribution link connecting the at least first square-wave voltage source to at least a first rectifier, the at least first rectifier having at least a first dc output for producing at least a first dc output voltage, the at least first rectifier having at least a third regular switching time T3 from a positive conducting state to a negative conducting state and having a fourth regular switching time T4 from a negative conducting state to a positive conducting state, at least a first series inductor in series in the ac power distribution link, the at least first series inductor conducting at least a first inductor current, and at least a first output capacitor connected to the at least first dc output of the at least first rectifier, a control means responsive to at least a first voltage feedback from the at least first dc output for controlling a duration of at least a first offset time (t) equal to the time difference between the first regular transition time T1 of the at least first square wave voltage and the at least third regular switching time T3 of the at least first rectifier, and also equal to the duration of equal to the time difference between the second regular transition time T2 of the at least first square wave voltage and the at least fourth regular switching time T4 of the at least first rectifier, the duration of the at least first offset time (t) thereby controlling the at least first inductor current through the at least first series inductor in response to variations of the at least first dc output voltage.

6. The high frequency square-wave power distribution system system of claim 5 wherein the at least first square-wave input voltage source is at least a first dc voltage source and at least a first full-bridge switch.

7. The high frequency square-wave power distribution system system of claim 5 further comprising at least a first series transformer in series in the ac power distribution link.

8. The high frequency square-wave power distribution system system of claim 6 further comprising at least a first series transformer in series in the ac power distribution link.

9. The high frequency square-wave power distribution system system of claim 5 further comprising a plurality of minimalized point of load (POL) power converters.

10. The high frequency square-wave power distribution system of claim 9 wherein the ac power distribution link further comprises at least a first re-squaring circuit comprising at least a first re-squaring full-bridge rectifier and at least a first re-squaring capacitor.

11. The high frequency square-wave power distribution system of claim 9 wherein the ac power distribution link further comprises a plurality of re-squaring circuits,

each of the plurality of re-squaring circuits respectively comprising a respective re-squaring full-bridge rectifier and a respective re-squaring capacitor.

12. The high frequency square-wave power distribution system system of claim 5 wherein the ac power distribution link further comprises at least a first series inductor in series in the ac power distribution link.

13. The minimalized power converter system of claim 9 wherein the ac power distribution link further comprises a plurality of series inductors in series in the ac power distribution link.