Sweeping frequency LLC resonant power regulator
First Claim
1. An LLC resonant power regulator system comprising:
- a transformer comprising a primary inductor and a secondary inductor;
an input resonant tank comprising an input resonant capacitor, an input leakage inductor, and the primary inductor connected in series having a first resonant frequency defined by the leakage inductor and the resonant capacitor and having a second resonant frequency defined by the leakage inductor, a magnetizing inductor and the resonant capacitor;
an input stage comprising a plurality of switches that are controlled in response to a respective plurality of switching signals sweeping frequency to supply an input resonant current to the input resonant tank, each of the respective plurality of switching signals having a fixed duty cycle and a sweeping frequency greater than at least one of the first or the second resonant frequency of the tank; and
an output resonant tank comprising an output resonant capacitor, an output leakage inductor, and the secondary inductor connected in series, the output resonant tank being configured to generate an oscillating output resonant current in a load connected at an output.
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Abstract
An LLC resonant power regulator system includes a transformer having a primary inductor and a secondary inductor and an input resonant tank including an input resonant capacitor, an input leakage inductor, and the primary inductor connected in series. The system also includes an input stage having a plurality of switches that are controlled in response to a respective plurality of switching signals sweeping frequency to supply an input resonant current to the input resonant tank. Each of the respective plurality of switching signals can have a fixed duty cycle and a sweeping frequency. The system further includes an output resonant tank that includes an output resonant capacitor, an output leakage inductor, and the secondary inductor connected in series. The output resonant tank can be configured to generate an oscillating output resonant current at an output.
18 Citations
18 Claims
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1. An LLC resonant power regulator system comprising:
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a transformer comprising a primary inductor and a secondary inductor; an input resonant tank comprising an input resonant capacitor, an input leakage inductor, and the primary inductor connected in series having a first resonant frequency defined by the leakage inductor and the resonant capacitor and having a second resonant frequency defined by the leakage inductor, a magnetizing inductor and the resonant capacitor; an input stage comprising a plurality of switches that are controlled in response to a respective plurality of switching signals sweeping frequency to supply an input resonant current to the input resonant tank, each of the respective plurality of switching signals having a fixed duty cycle and a sweeping frequency greater than at least one of the first or the second resonant frequency of the tank; and an output resonant tank comprising an output resonant capacitor, an output leakage inductor, and the secondary inductor connected in series, the output resonant tank being configured to generate an oscillating output resonant current in a load connected at an output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An LLC resonant power regulator system comprising:
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a transformer comprising a primary inductor and a secondary inductor; an input resonant tank comprising an input resonant capacitor, an input leakage inductor, and the primary inductor connected in series; an input stage comprising a plurality of switches that are controlled in response to a respective plurality of switching signals sweeping frequency to supply an input resonant current to the input resonant tank, each of the respective plurality of switching signals having a fixed duty cycle and a sweeping frequency; an output resonant tank comprising an output resonant capacitor, an output leakage inductor, and the secondary inductor connected in series, the output resonant tank being configured to generate an oscillating output resonant current at an output, further comprising a plurality of output stages, each of the plurality of output stages comprising resonant circuitry that includes an output stage resonant tank, the sweeping frequency being controlled to regulate the output resonant current in each respective output stage resonant tank, wherein the transformer is configured to generate an intermediate current at the secondary inductor thereof in response to the input resonant current through the primary inductor thereof, and wherein each of the plurality of output stages further comprises; an output stage transformer comprising an output primary inductor inductively coupled with an output secondary inductor, the output primary inductor conducting the intermediate current therethrough to induce a corresponding output stage resonant current through the output secondary inductor; and the resonant circuitry comprising the output secondary inductor of the output stage transformer, the output leakage inductor of the output stage transformer, and at least one output resonant capacitor connected in series with a respective load, the corresponding output resonant current oscillating through the resonant circuitry to the respective load connected in series with the at least one resonant capacitor.
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12. A method for providing AC power via an LLC resonant power regulator, the method comprising:
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generating a plurality of switching signals having a substantially fixed 50% duty-cycle and a sweeping frequency; controlling a plurality of switches in response to the respective plurality of switching signals to provide an input resonant current to an input resonant tank, the input resonant tank comprising an input resonant capacitor, an input leakage inductor, and a primary inductor of a transformer;
having a first resonant frequency defined by the leakage inductor and the resonant capacitor and having a second resonant frequency defined by the leakage inductor, a magnetizing inductor and the resonant capacitor and having a sweeping frequency greater than at least one of the first or the second resonant frequency of the tank;inducing an output resonant current through a secondary inductor of the transformer in response to the input resonant current, the output resonant current resonating through an output resonant tank that includes the secondary inductor of the transformer; and conducting the output resonant current as an AC current through a load, the load being coupled in series with the output resonant tank. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for providing AC power via an LLC resonant power regulator, the method comprising:
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generating a plurality of switching signals having a substantially fixed 50% duty-cycle and a sweeping frequency; controlling a plurality of switches in response to the respective plurality of switching signals to provide an input resonant current to an input resonant tank, the input resonant tank comprising an input resonant capacitor, an input leakage inductor, and a primary inductor of a transformer; inducing an output resonant current through a secondary inductor of the transformer in response to the input resonant current, the output resonant current resonating through an output resonant tank that includes the secondary inductor of the transformer; and conducting the output resonant current as an AC current through a load, the load being coupled in series with the output resonant tank, wherein inducing the output resonant current further comprises inducing an output resonant current through an output secondary inductor of each of a plurality of output stage transformers in response to the input resonant current, the output resonant current resonating through each of a respective plurality of output resonant circuits, each of which includes the respective output secondary inductor and wherein inducing the output resonant current further comprises; generating an intermediate current at the secondary inductor of the transformer in response to the input resonant current; providing the intermediate current to each of a plurality of output primary inductors associated with the respective plurality of output stage transformers; and inducing the output resonant current through the output secondary inductor of each of the plurality of output stage transformers in response to the intermediate current.
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Specification