Patent application number | Description | Published |
20110241431 | SOLAR LIGHT POWER GENERATION SYSTEM, CONTROL DEVICE, AND CONTROL METHOD THEREOF - A solar light power generation system, a control device, and a control method thereof are provided. The solar light power generation system includes: a solar cell array configured to output a plurality of branches of electric energy; a combination control unit configured to receive the plurality of branches of electric energy output by the solar cell array, detect output characteristics of the plurality of branches of electric energy, and adjust combination of series connection and/or parallel connection of the plurality of branches of electric energy dynamically according to the output characteristics, so as to output one or more branches of electric energy; and an energy converting unit, configured to receive the one or more branches of electric energy output by the combination control unit, perform energy converting, and output the converted electric energy. The system adjusts combination of the branches of electric energy. | 10-06-2011 |
20140306669 | Apparatus and Method for Power Converters - A method for improving a power converter's efficiency comprises detecting an input voltage of a power converter, determining an operation mode of the power converter based upon the input voltage of the power converter and generating a plurality of gate drive signals based upon a damped gain control, wherein the damped gain control is configured such that an output voltage of the power converter is in a range from a tightly regulated output voltage to an unregulated output voltage. | 10-16-2014 |
20140307482 | Apparatus and Method for Resonant Converters - A method for improving a power converter's efficiency comprises providing a resonant converter, wherein the resonant converter comprises an input coupled to a power source, a plurality of power switches coupled to the input, a resonant tank coupled to the plurality of power switches and a controller coupled to the power switches and generating a plurality of gate drive signals for the power switches, wherein the gate drive signals are arranged such that a switching frequency of the resonant converter is in a frequency band. | 10-16-2014 |
20150103561 | Apparatus and Method for Multiple Primary Bridge Resonant Converters - A converter comprises an input stage coupled to a power source, wherein the input stage comprises a plurality of power switches, a first resonant tank coupled to the input stage, wherein the first resonant tank is of a first Q value, a second resonant tank coupled to the input stage, wherein the second resonant tank is of a second Q value, a transformer coupled to the input stage through the first resonant tank and the second resonant tank and an output stage coupled to the transformer. | 04-16-2015 |
20150109824 | Apparatus and Method for High Efficiency Resonant Converters - A converter comprises an input stage coupled to a power source, wherein the input stage comprises a plurality of power switches, a resonant tank coupled to the plurality of power switches, a transformer coupled to the resonant tank, an output stage coupled to the transformer, an efficiency point tracking indicator coupled to the converter, a detector coupled to the efficiency point tracking indicator and a control circuit configured to receive an efficiency point tracking signal from the detector and adjust a switching frequency of the power switches based upon the efficiency point tracking signal. | 04-23-2015 |
20150124487 | Adjustable Resonant Apparatus for Power Converters - An apparatus comprises a first series resonant inductor coupled to a switching network and a transformer, a first series resonant capacitor coupled to the switching network and the transformer, a first parallel inductor coupled to the switching network through the first series resonant inductor and the first series resonant capacitor, a resonant frequency adjusting device coupled to the switching network and the transformer and a switch connected in series with the resonant frequency adjusting device. | 05-07-2015 |
20150124488 | Startup Method and System for Resonant Converters - A method comprises providing a resonant converter comprising a switching network comprising a plurality of switches, a resonant tank coupled between the switching network and a transformer, wherein the resonant tank comprises a series resonant inductor coupled to a switching network and the transformer and a series resonant capacitor coupled to the switching network and the transformer and a driver having an adjustable bias voltage and in response to a startup process of the resonant converter, configuring the switching network to operate a switching frequency higher than a resonant frequency of the resonant tank. | 05-07-2015 |
20150124489 | Current Sensing Apparatus for Power Converters - An apparatus comprises a magnetic device coupled to an inductor-inductor-capacitor (LLC) resonant converter, an ac current sensing circuit coupled to the magnetic device, an average current sensing circuit coupled to the ac current sensing circuit and a reference voltage source coupled to the average current sensing circuit, wherein the reference voltage source is configured such that a magnitude of an average signal from the average current sensing circuit is greater than a voltage level of the reference voltage source. | 05-07-2015 |
20150124492 | Apparatus and Method for High Efficiency LLC Resonant Converters - A method comprises providing a resonant converter, wherein the resonant converter comprises an input switch network coupled to a power source, wherein the input switch network comprises a plurality of power switches, a resonant tank coupled to the plurality of power switches, a transformer coupled to the resonant tank and an output stage coupled to the transformer, wherein the output stage comprises a synchronous rectifier formed by a first switch and a second switch, detecting a drain voltage of the first switch, comparing the drain voltage with a predetermined voltage threshold, wherein the drain voltage is coupled to a negative input of a comparator and the predetermined voltage threshold is coupled to a positive input of the comparator, generating a logic state based upon an output of the comparator and adjusting, by a control circuit, a switching frequency of the resonant converter based upon the logic state. | 05-07-2015 |