Simplified UPS system
First Claim
Patent Images
1. A power supply system, comprising:
- (a) resonant control means for providing gate drive signals;
(b) a gate drive circuit comprising a current booster and a first transformer, said current booster comprising an input coupled to an output of said resonant control means, said first transformer comprising a primary winding coupled to an output of said current booster and two secondary windings;
(c) a resonant converter comprising first and second transistors and a second transformer, each transistor comprising a gate coupled to a secondary winding of said first transformer, said second transformer comprising a secondary winding and a primary winding coupled to said transistors so as to be driven by said transistors; and
(d) a bootstrap power supply circuit comprising a first auxiliary winding associated with said second transformer and power supply means associated with said first auxiliary winding for supplying an isolated DC supply voltage to said resonant control means.
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Abstract
A UPS system comprising a resonant control circuit 100, a gate drive circuit 200, a resonant converter 300, a bootstrap power supply circuit 400 for supplying an isolated DC supply voltage to the resonant control circuit, a bootstrap battery charger 500, and a variable speed fan drive circuit 600.
140 Citations
20 Claims
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1. A power supply system, comprising:
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(a) resonant control means for providing gate drive signals; (b) a gate drive circuit comprising a current booster and a first transformer, said current booster comprising an input coupled to an output of said resonant control means, said first transformer comprising a primary winding coupled to an output of said current booster and two secondary windings; (c) a resonant converter comprising first and second transistors and a second transformer, each transistor comprising a gate coupled to a secondary winding of said first transformer, said second transformer comprising a secondary winding and a primary winding coupled to said transistors so as to be driven by said transistors; and (d) a bootstrap power supply circuit comprising a first auxiliary winding associated with said second transformer and power supply means associated with said first auxiliary winding for supplying an isolated DC supply voltage to said resonant control means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Power supply means, comprising:
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(a) resonant control means for providing gate drive signals; (b) gate drive means for boosting said gate drive signals; (c) resonant converter means, responsive to boosted gate drive signals from said gate drive means, for converting an AC input source to an isolated and regulated DC output source; and (d) bootstrap power supply means for supplying an isolated DC supply voltage to said resonant control means. - View Dependent Claims (15, 16, 17, 18)
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19. A method for operating a power supply, comprising the steps of:
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(a) rectifying an AC input source and storing the rectified source as a DC voltage; (b) generating a pair of alternately-on gate drive signals; (c) transforming said DC voltage to an isolated DC voltage by carrying out the following sub-steps;
(i) employing said gate drive signals to invert said DC voltage into an alternating current, (ii) sensing said alternating current and controlling the timing of said gate drive signals such that said alternating current has a controlled frequency, (iii) transforming said alternating current having a controlled frequency into an isolated AC voltage, and (iv) rectifying a first portion of said isolated AC voltage into said isolated DC voltage; and(d) rectifying and regulating a second portion of said isolated AC voltage and employing the rectified regulated voltage as a DC supply voltage for powering a further generation of a pair of alternately-on gate drive signals. - View Dependent Claims (20)
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Specification