Power capacitor alternative switch circuitry system for enhanced capacitor life
First Claim
1. An enhanced component power system comprising:
- at least one DC energy source providing a DC input that has two DC power lines;
a parallel inductive element connected across said two DC power lines as part of a path;
alternative switch circuitry connected to said parallel inductive element that establishes a first alternative circuitry path across said DC power lines through said parallel inductive element and a second alternative circuitry path across said DC power lines through said parallel inductive element;
a capacitor path responsive to said alternative switch circuitry in said first alternative circuitry path;
an alternative circuitry path also responsive to said alternative switch circuitry in said second alternative circuitry path; and
a smoothed DC power output connected to said capacitor path in said first alternative circuitry path and said second alternative circuitry path.
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Accused Products
Abstract
Reliability enhanced systems are shown where an short-lived electrolytic capacitor can be replaced by a much smaller, perhaps film type, longer-lived capacitor to be implemented in circuits for power factor correction, solar power conversion, or otherwise to achieve DC voltage smoothing with circuitry that has solar photovoltaic source (1) a DC photovoltaic input (2) internal to a device (3) and uses an enhanced DC-DC power converter (4) to provide a smoothed DC output (6) with capacitor substitution circuitry (14) that may include interim signal circuitry (28) that creates a large voltage variation for a replaced capacitor (16). Switchmode designs may include first and second switch elements (17) and (18) and an alternative path controller (21) that operates a boost controller (22) and a buck controller (23) perhaps with a switch duty cycle controller (32).
270 Citations
31 Claims
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1. An enhanced component power system comprising:
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at least one DC energy source providing a DC input that has two DC power lines; a parallel inductive element connected across said two DC power lines as part of a path; alternative switch circuitry connected to said parallel inductive element that establishes a first alternative circuitry path across said DC power lines through said parallel inductive element and a second alternative circuitry path across said DC power lines through said parallel inductive element; a capacitor path responsive to said alternative switch circuitry in said first alternative circuitry path; an alternative circuitry path also responsive to said alternative switch circuitry in said second alternative circuitry path; and a smoothed DC power output connected to said capacitor path in said first alternative circuitry path and said second alternative circuitry path.
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2. An enhanced component power system as described in claim 1 and further comprising a substantially power isomorphic photovoltaic DC-DC power converter.
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3. An enhanced component power system as described in claim 1 wherein said alternative switch circuitry comprises:
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a first switch element connected to said parallel inductive element; and a second switch element connected to said parallel inductive element and across said capacitor path.
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4. An enhanced component power system as described in claim 1 wherein said DC input has an alternating current component superimposed on a DC signal, and further comprising a low ripple controller to which said alternative switch circuitry is responsive.
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5. An enhanced component power system as described in claim 4 wherein said capacitor path operatively stores a maximum operative capacitor energy, wherein said parallel inductive element operatively stores a maximum operative inductor energy, and wherein said maximum operative capacitor energy is substantially greater than said maximum operative inductor energy.
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6. An enhanced component power system as described in claim 5 wherein said maximum operative capacitor energy and said maximum operative inductor energy are selected from a group consisting of:
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a maximum operative capacitor energy that is at least about two times as big as said maximum operative inductor energy; a maximum operative capacitor energy that is at least about five times as big as said maximum operative inductor energy; and a maximum operative capacitor energy that is at least about ten times as big as said maximum operative inductor energy.
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7. An enhanced component power system as described in claim 5 wherein said capacitor path has a capacitor size selected from a group consisting of:
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a 5 μ
F capacitor;a 10 μ
F capacitor;a 50 μ
F capacitor;a 100 μ
F capacitor;a 500 μ
F capacitor;a capacitor sized at less than about one hundredth of an equivalent electrolytic circuit capacitance; a capacitor sized at less than about one fiftieth of an electrolytic circuit capacitance; a capacitor sized at less than about one twentieth of an equivalent electrolytic circuit capacitance; and a capacitor sized at less than about one tenth of an equivalent electrolytic circuit capacitance.
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8. An enhanced component power system as described in claim 1 and further comprising a boost controller.
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9. An enhanced component power system as described in claim 8 and further comprising a buck controller.
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10. An enhanced component power system as described in claim 1 and further comprising large voltage variation interim signal circuitry.
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11. An enhanced component power system as described in claim 10 wherein said large voltage variation interim signal circuitry is selected from a group consisting of:
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at least about twenty times voltage variation signal creation circuitry; at least about ten times voltage variation signal creation circuitry; at least about five times voltage variation signal creation circuitry; and at least about double voltage variation signal creation circuitry.
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12. An enhanced component power system as described in claim 10 wherein said large voltage variation interim signal circuitry comprises a voltage transformer.
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13. An enhanced component power system as described in claim 12 wherein said voltage transformer comprises a switch-mode isolated power converter.
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14. An enhanced component power system as described in claim 1 and further comprising a full circuit component bypass capacitor.
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15. An enhanced component power system as described in claim 14 wherein said full circuit component bypass capacitor comprises a relatively small bypass capacitor.
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16. An enhanced component power system as described in claim 15 wherein said relatively small bypass capacitor comprises a high frequency operative energy storage bypass capacitor.
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17. An enhanced component power system as described in claim 16 wherein said high frequency operative energy storage bypass capacitor comprises a greater than high frequency cycle-by-cycle energy storage bypass capacitor.
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18. An enhanced component power system as described in claim 1 and further comprising a high frequency switch controller selected from a group consisting of:
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an at least about one thousand times a predominant ripple frequency switch controller; an at least about five hundred times a predominant ripple frequency switch controller; and an at least about one hundred times a predominant ripple frequency switch controller.
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19. An enhanced component power system as described in claim 1 and further comprising at least one antiparallel diode.
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20. A device with power factor correction having enhanced life comprising:
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operationally active power circuitry for said device and having at least one internal, substantially DC device voltage in two DC power lines; an inductive element connected to one of said DC power lines; alternative switch circuitry connected to said inductive element; a capacitor path responsive to said alternative switch circuitry; an alternative circuitry path also responsive to said alternative switch circuitry; a power factor controller to which said operationally active power circuitry for said device is responsive; a low ripple controller to which said alternative switch circuitry is responsive; and an internal low ripple DC voltage connected to said capacitor path and said alternative circuitry path and responsive to said low ripple controller.
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21. A device with enhanced life power factor correction as described in claim 20 wherein said capacitor path operatively stores a maximum operative capacitor energy, wherein said inductive element operatively stores a maximum operative inductor energy, and wherein said maximum operative capacitor energy is substantially greater than said maximum operative inductor energy.
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22. A device with enhanced life power factor correction as described in claim 21 wherein said maximum operative capacitor energy and said maximum operative inductor energy are selected from a group consisting of:
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a maximum operative capacitor energy that is at least about two times as big as said maximum operative inductor energy; a maximum operative capacitor energy that is at least about five times as big as said maximum operative inductor energy; and a maximum operative capacitor energy that is at least about ten times as big as said maximum operative inductor energy.
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23. A device with enhanced life power factor correction as described in claim 20 wherein said low ripple controller comprises a switch frequency controller.
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24. A device with enhanced life power factor correction as described in claim 23 wherein said switch frequency controller comprises a switch frequency controller high frequency switch controller.
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25. A device with enhanced life power factor correction as described in claim 20 wherein said low ripple controller comprises a boost controller.
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26. A device with enhanced life power factor correction as described in claim 25 and further comprising a buck controller.
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27. A device with enhanced life power factor correction as described in claim 20 wherein said alternative circuitry path comprises a substantially energy storage free circuitry path.
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28. A device with enhanced life power factor correction as described in claim 20 and further comprising a feedback sensor to which said low ripple controller is responsive.
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29. A device with enhanced life power factor correction as described in claim 28 wherein said feedback sensor comprises an output voltage feedback sensor.
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30. A device with enhanced life power factor correction as described in claim 20 wherein said low ripple controller comprises a switch duty cycle controller.
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31. A device with enhanced life power factor correction as described in claim 30 wherein said switch duty cycle controller comprises an output voltage duty cycle controller.
Specification