Abstract: A single-phase converter control method and apparatus, includes calculating on a voltage corresponding to a first level output by a single-phase converter, a voltage corresponding to a second level output by the single-phase converter, and a voltage reference value about the voltage corresponding to the first level and the voltage corresponding to the second level to obtain a common-mode modulated-wave change rate of the single-phase converter, where the first level is a direct-current-side positive-bus level, and the second level is a direct-current-side negative-bus level, calculating on a first-phase initial modulated wave of the single-phase converter, a second-phase initial modulated wave of the single-phase converter, and the common-mode modulated-wave change rate to obtain a common-mode modulated wave of the single-phase converter, and calculating on the first-phase initial modulated wave, the second-phase initial modulated wave, and the common-mode modulated wave to obtain a pulse width modulated wave

Abstract: A system comprises a first inverter and a second inverter connected in parallel, a coupled inductor connected to outputs of the first inverter and the second inverter, wherein the coupled inductor comprises a plurality of windings formed by a single winding wire and an output filter coupled to an output of the coupled inductor.

Abstract: A charging method, a terminal, a charger, and a system, includes: obtaining, by a terminal, a charging mode supported by a charger connected to the terminal; when the charging mode supported by the charger includes an open-loop fast charging mode, detecting, by the terminal, whether both the terminal and the charger are in an open loop state; when both the terminal and the charger are in the open loop state, sending, by the terminal, an open-loop fast charging instruction to the charger; and receiving, by the terminal, a voltage and a current that are transmitted by the charger according to the open-loop fast charging instruction, and performing charging in the open-loop fast charging mode. When determining that the charger supports charging in the open-loop fast charging mode, the terminal is adjusted to the open loop state to perform charging, so as to shorten a charging time and improve user experience.

Abstract: An embodiment apparatus comprises a magnetic core comprising a first side and a second side opposite the first side, a first winding comprising a first portion wound around the first side and a second portion wound around the second side, a second winding comprising a third portion wound around the first side and a fourth portion wound around the second side, wherein the second portion and the fourth portion are coupled to each other.

Abstract: A power converter, including: at least two inverting modules, where direct current sides of the at least two inverting modules are connected in parallel using a laminated busbar or a circuit board, and the at least two inverting modules run in an interleaved and parallel manner. In the present invention, the power converter is formed by connecting at least two inverting modules in parallel, and the direct current sides of the at least two inverting modules are connected in parallel using the laminated busbar or the circuit board, so that parasitic inductance between inverting modules is small, forming a low parasitic inductance loop. When the at least two inverting modules run in an interleaved and parallel manner, the low parasitic inductance loop counteracts most ripple currents in a circuit, thereby reducing the burden of the ripple currents on a bus capacitor. Therefore, the demand of the power converter provided in the present invention for the bus capacitor is small.

Abstract: A system comprises a plurality of inverter units having inputs connected to a power source and a coupled inductor comprising a plurality of windings and coupled between the plurality of inverter units and an output filter, wherein each winding of the plurality of windings has a first terminal connected to an output of a corresponding inverter unit and second terminals of the plurality of windings are connected together.

Abstract: The present disclosure provides a method for protecting a dex file from being decompiled in an Android system. The method comprises the following content: 1) loading a dex file into an inaccessible memory of an Android system; and 2) during execution, by performing reference execution, preventing the dex file from being found. In the method for protecting a dex file from be ing decompiled in an Android system in the present disclosure, a dex file is loaded into an inaccessible memory by means of a reference method, so that the dex file is prevented from being locally downloaded tor being copied and propagated; during execution, by means of reference execution, a decompiling person is prevented from finding the dex file so that the decompiling person cannot perform reverse engineering, thereby protecting an Android program from being decompiled.

Abstract: A system comprises a first T-type inverter connected to a dc power source, a second T-type inverter connected to the dc power source, wherein the second T-type inverter is configured to operate with a first phase shift from the first T-type inverter, a third T-type inverter connected to the dc power source, wherein the third T-type inverter is configured to operate with a second phase shift from the second T-type inverter, a coupled inductor having a first input, a second input and a third input connected to the first T-type inverter, the second T-type inverter and the third T-type inverter respectively and an output filter coupled to the output of the coupled inductor.

Abstract: A power converter, includes a first terminal and a second terminal which are connected to a direct current; a third terminal connected to an alternating current; N multi-level bridge arms connected in parallel to the first terminal and the second terminal, where the N multi-level bridge arms work in a parallel-interleaved manner, each multi-level bridge arm of the N multi-level bridge arms includes an alternating current node, and multiple time-varying levels are generated at the alternating current node, where the multiple levels are more than two levels; and a coupling inductor, including N windings coupled by one common magnetic core, where one end of each winding of the N windings is connected to an alternating current node of one multi-level bridge arm of the N multi-level bridge arms, and the other end of each winding of the N windings is connected to the third terminal.

Abstract: A photovoltaic system including multiple photovoltaic cell strings, a converter, a controller, and a bus is presented. The multiple photovoltaic cell strings include at least one string group in which parallel-connected photovoltaic cell strings are coupled to one current sensor, where the at least one string group, after being connected in parallel, is coupled to the converter using the bus, the current sensor is configured to detect a total current of each string group, the controller is configured to adjust, when receiving a report from the current sensor that a reverse current exists in a target string group in the at least one string group, a control signal output to the converter, and the converter is configured to decrease, according to an adjusted control signal, a system voltage between the buses to decrease the reverse current in the target string group.

Abstract: A system comprises a first T-type inverter connected to a dc power source, a second T-type inverter connected to the dc power source, wherein the second T-type inverter is configured to operate with a first phase shift from the first T-type inverter, a third T-type inverter connected to the dc power source, wherein the third T-type inverter is configured to operate with a second phase shift from the second T-type inverter, a coupled inductor having a first input, a second input and a third input connected to the first T-type inverter, the second T-type inverter and the third T-type inverter respectively and an output filter coupled to the output of the coupled inductor.

Abstract: An inverter comprises a first input capacitor and a second input capacitor connected in series, an inverting unit comprising a first switch, a second switch, a third switch and a fourth switch connected in series, wherein the inverting unit is connected to an input of an L-C filter, a first bidirectional conductive path connected between a common node of the first switch and the second switch, and a common node of the first input capacitor and the second input capacitor, a second bidirectional conductive path connected between a common node of the third switch and the fourth switch, and the common node of the first input capacitor and the second input capacitor and a flying capacitor connected between the common node of the first switch and the second switch, and the common node of the third switch and the fourth switch.

Abstract: A coupled inductor and a power converter includes at least two input ends, an output end, a common magnetic core, at least two first windings, and at least two second windings. The common magnetic core includes at least two magnetic cylinders, and the number of the at least two magnetic cylinders corresponds to the number of the at least two input ends; and one first winding and one second winding are twined in parallel on each cylinder among the at least two magnetic cylinders, and the first windings and the second windings on the at least two magnetic cylinders are mutually connected between the at least two input ends and the output end to form mutually coupled inductances and when currents that flow into the at least two input ends are equal, make the first winding and the second winding on each cylinder generate opposite magnetic potentials.

Abstract: A coupled inductor and a power converter. The coupled inductor includes a magnetic core and at least two windings. The magnetic core includes at least two first magnetic cylinders, at least one second magnetic cylinder, and two opposite magnet yokes. The at least two first magnetic cylinders and the at least one second magnetic cylinder are disposed between the two opposite magnet yokes, the at least two windings are respectively located on the at least two first magnetic cylinders, and the at least two windings are in a one-to-one correspondence with the at least two first magnetic cylinders. Leakage inductance of the coupled inductor is increased by adding a second magnetic cylinder between the opposite magnet yokes of the coupled inductor, thereby meeting a requirement of system stability when the coupled inductor is connected to the power converter.

Abstract: A coupled inductor and a power converter includes a magnetic core and at least two windings. The magnetic core includes at least two magnetic cylinders and two opposite magnet yokes. The at least two magnetic cylinders are disposed between the two opposite magnet yokes, the at least two windings are respectively wound around the at least two magnetic cylinders, the at least two windings are in a one-to-one correspondence with the at least two magnetic cylinders, and the at least two windings do not extend out of the two opposite magnet yokes in at least one direction, where each direction of the at least one direction is a direction perpendicular to side faces of the two opposite magnet yokes.

Abstract: A system comprises a first T-type inverter and a second T-type inverter connected to a dc power source and a first winding of a transformer, wherein the second T-type inverter is configured to operate with a first phase shift from the first T-type inverter, a third T-type inverter and a fourth T-type inverter connected to the dc power source and a second winding of the transformer, wherein the fourth T-type inverter is configured to operate with a second phase shift from the third T-type inverter and a fifth T-type inverter and a sixth T-type inverter connected to the dc power source and a third winding of the transformer, wherein the sixth T-type inverter is configured to operate with a third phase shift from the fifth T-type inverter.

Abstract: A wave loss detection circuit includes: an anode of the diode receives a first drive signal, and a cathode of the diode is connected to a first end of the first resistor; a second end of the first resistor is connected to a first end of the first energy storage unit, a first end of the second resistor, and a first input end of the comparison unit; a second end of the first energy storage unit and a second end of the second resistor are connected to a ground level, and a resistance of the first resistor is less than a resistance of the second resistor; a second input end of the comparison unit is configured to receive a threshold voltage, and if a voltage signal received by the first input end is less than the threshold voltage, which indicates that a wave loss occurs in the first drive signal.

Abstract: A system comprising a plurality of stacks and a plurality of converters, each of the plurality of converters is operable to charge a corresponding stack for adsorbing ions in a liquid, wherein when one of the plurality of stacks is charged or discharged at a first state, one of the plurality of converters associating with the stack operates in a first mode, and is configured to indirectly convert a first voltage to a second voltage at least by an intermediate stage, one of the plurality of stacks is charged or discharged at a second state, one of the plurality of converters associating with the stack operates in a second mode, and is configured to directly convert the first voltage to the second voltage.

Abstract: A system having an alternating current (AC) driven LED unit, an AC voltage regulator, and a controller is provided. The AC driven LED unit includes a first LED and a second LED coupled in reverse parallel. The AC voltage regulator is operable to receive AC voltage originating from an AC voltage source, regulate the AC voltage according to control signals from the controller, and apply regulated AC voltage to the AC driven LED unit, so as to enable the first LED and the second LED to emit light according to the regulated AC voltage. In addition, a method is provided for driving the LED by regulating the AC voltage. By regulating the AC voltage using the AC voltage regulator, benefits of restraining voltage fluctuations, reducing THD, improving power factor, providing dimming control, and mitigating flicker phenomenon can be achieved.

Abstract: A multilevel converter includes at least one converting unit, where the converting unit includes N interleaved parallel bridge arms which enable the converting unit to output 2[(M?1×)N]+1 level signals, where N is an integer greater than or equal to 3, M is the number of levels received by the converting unit, and M is an integer greater than or equal to 3; a direct current inputting unit that supplies the direct current to the converting unit; a voltage dividing unit, where an input end of the voltage dividing unit is connected to an output of the direct current inputting unit, and an output end of the voltage dividing unit is connected to an input end of the converting unit; and at least one filtering unit, where the filtering unit is connected to the converting unit to output an alternating current.