Abstract: The embodiments of the present disclosure provide a switching method and a multi-input power system, where the method is used to control an input power source connected with N power supply units, and N is greater than 1, and the method includes: determining a switching strategy for each power supply unit, where the switching strategy is used to indicate a moment when input of a power supply unit is switched from an auxiliary input power source to a main input power source; switching, according to the switching strategy, the input of each power supply unit from the auxiliary input power source to the main input power source at the moment indicated by the switching strategy, where the main input power source includes a standby power source.

Abstract: The disclosure provides a power supply unit, including: a first high-frequency isolating converter including a first end connected to a first voltage, a second end and a third end; and a second high-frequency isolating converter including a first end connected to a second voltage, a second end and a third end, wherein the second end of the second high-frequency isolating converter and the second end of the first high-frequency isolating converter are connected in parallel to a first end of a first load, and the third end of the second high-frequency isolating converter and the third end of the first high-frequency isolating converter are connected in parallel to a second end of the first load. The disclosure further provides a loop power supply system having the power supply unit.

Abstract: The present application provides a power supply apparatus, a three-phase power supply system and a control method, including N modules, where N is a positive integer greater than or equal to 2, and each module includes: a transformer, including a primary winding and a first secondary winding; and a first switch unit connected to the first secondary winding of the transformer, where primary windings of transformers of the N modules are connected in series, the first switch unit operates in one of a bypass mode, an open-circuit mode and a modulation mode, an output of each module is controlled by the first switch unit, so as to make the power supply apparatus provide voltages of different amplitudes according to power demand, and transformers with large volume and heavy weight, such as a centralized line frequency transformer or a multiple-winding transformer, are no longer required.

Abstract: The disclosure provides a power supply unit, including: a first high-frequency isolating converter including a first end connected to a first voltage, a second end and a third end; and a second high-frequency isolating converter including a first end connected to a second voltage, a second end and a third end, wherein the second end of the second high-frequency isolating converter and the second end of the first high-frequency isolating converter are connected in parallel to a first end of a first load, and the third end of the second high-frequency isolating converter and the third end of the first high-frequency isolating converter are connected in parallel to a second end of the first load. The disclosure further provides a loop power supply system having the power supply unit.

Abstract: The embodiments of the present disclosure provide a switching method and a multi-input power system, where the method is used to control an input power source connected with N power supply units, and N is greater than 1, and the method includes: determining a switching strategy for each power supply unit, where the switching strategy is used to indicate a moment when input of a power supply unit is switched from an auxiliary input power source to a main input power source; switching, according to the switching strategy, the input of each power supply unit from the auxiliary input power source to the main input power source at the moment indicated by the switching strategy, where the main input power source includes a standby power source.

Abstract: The present disclosure provides a DC power supply system, comprising: a first power supply circuit and a second power supply circuit, each power supply circuit comprises a phase-shifting transformer and an AC-DC conversion circuit; and a bidirectional electronic switch electrically coupled between the output end of the first power supply circuit and the output end of the second power supply circuit, wherein the bidirectional electronic switch is configured to transmit power between the output end of the first power supply circuit and the output end of the second power supply circuit depend on the voltage difference of the two output voltages.

Abstract: A direct current power supply system includes at least one first input source, a second input source, a phase shifting transformer set, a rectifier set and a monitoring module. The phase shifting transformer set is for converting a medium voltage alternating current of the first input source and/or the second input source to a low voltage alternating current. The rectifier set is for rectifying the low voltage AC to a low voltage DC. The phase shifting transformer set and the rectifier set are disposed either in a power supply housing, or in two adjacent power supply housings. The monitoring module includes a phase shifting transformer monitoring unit for retrieving at least one of temperature data, voltage data and current data of the phase shifting transformer set and a rectifier monitoring unit for retrieving at least one of temperature data, voltage data and current data of the rectifier set.

Abstract: Embodiments of the present disclosure provide an LLC resonant converter system. The LLC resonant converter system includes: a first resonant circuit including a first switch circuit, a first LC resonant circuit, a first transformer, and a first rectifier circuit; and a second resonant circuit including a second switch circuit, a second LC resonant circuit, a second transformer, and a second rectifier circuit; where one secondary side winding of the first transformer is connected in series with one secondary side winding of the second transformer to form a first series branch, and the other secondary side winding of the first transformer is connected in series with the other secondary side winding of the second transformer to form a second series branch. The LLC resonant converter system achieves current equilibrium or voltage equilibrium in a two-branch resonant circuit, thereby simplifying a control circuit and improving current equilibrium or voltage equilibrium effects.

Abstract: The present disclosure provides a DC power supply system, comprising: a first power supply circuit and a second power supply circuit, each power supply circuit comprises a phase-shifting transformer and an AC-DC conversion circuit; and a bidirectional electronic switch electrically coupled between the output end of the first power supply circuit and the output end of the second power supply circuit, wherein the bidirectional electronic switch is configured to transmit power between the output end of the first power supply circuit and the output end of the second power supply circuit depend on the voltage difference of the two output voltages.

Abstract: The disclosure discloses a power conversion device and a power conversion system. The power conversion device comprises a plurality of conversion branches, each comprising an input terminal and an output terminal. The input terminals of the plurality of conversion branches are connected in parallel, and the output terminals of the plurality of conversion branches are connected in series. An output voltage of the power conversion device is a sum of voltages at the output terminals of the plurality of conversion branches.

Abstract: Embodiments of the present disclosure provide an LLC resonant converter system. The LLC resonant converter system includes: a first resonant circuit including a first switch circuit, a first LC resonant circuit, a first transformer, and a first rectifier circuit; and a second resonant circuit including a second switch circuit, a second LC resonant circuit, a second transformer, and a second rectifier circuit; where one secondary side winding of the first transformer is connected in series with one secondary side winding of the second transformer to form a first series branch, and the other secondary side winding of the first transformer is connected in series with the other secondary side winding of the second transformer to form a second series branch. The LLC resonant converter system achieves current equilibrium or voltage equilibrium in a two-branch resonant circuit, thereby simplifying a control circuit and improving current equilibrium or voltage equilibrium effects.

Abstract: A direct current power supply system includes at least one first input source, a second input source, a phase shifting transformer set, a rectifier set and a monitoring module. The phase shifting transformer set is for converting a medium voltage alternating current of the first input source and/or the second input source to a low voltage alternating current. The rectifier set is for rectifying the low voltage AC to a low voltage DC. The phase shifting transformer set and the rectifier set are disposed either in a power supply housing, or in two adjacent power supply housings. The monitoring module includes a phase shifting transformer monitoring unit for retrieving at least one of temperature data, voltage data and current data of the phase shifting transformer set and a rectifier monitoring unit for retrieving at least one of temperature data, voltage data and current data of the rectifier set.

Abstract: The present disclosure relates to a magnetic component, a converter and an inductor. The magnetic component includes a magnetic core including a first winding window, a second winding window and a third winding window; and a winding including a first winding, a second winding and a third winding, which are wound in the first winding window, the second winding window and the third winding window, respectively, wherein when an alike current flows through the first winding, a second winding and the third winding, magnetic fluxes respectively generated in magnetic core units forming the first winding window and the second winding window are superposed on a first common magnetic column therebetween, and magnetic fluxes respectively generated in magnetic core units forming the second winding window and the third winding window are superposed on a second common magnetic column therebetween.

Abstract: A copper winding structure includes a first copper sheet having a first body, a first extending part and a second extending part located at two ends of the first body, respectively; and a second copper sheet having a second body, a third extending part and a fourth extending part located at two ends of the second body, respectively, the third extending part intersects with the fourth extending part such that the second body is partially overlapped; after the first copper sheet is stacked with the second copper sheet, the second extending part aligns with the third extending part, and the first extending part and the fourth extending part are located on the same side with respect to the second extending part and the third extending part.

Abstract: A copper winding structure includes a first copper sheet having a first body, a first extending part and a second extending part located at two ends of the first body, respectively; and a second copper sheet having a second body, a third extending part and a fourth extending part located at two ends of the second body, respectively, the third extending part intersects with the fourth extending part such that the second body is partially overlapped; after the first copper sheet is stacked with the second copper sheet, the second extending part aligns with the third extending part, and the first extending part and the fourth extending part are located on the same side with respect to the second extending part and the third extending part.

Abstract: The disclosure discloses a power conversion device and a power conversion system. The power conversion device comprises a plurality of conversion branches, each comprising an input terminal and an output terminal. The input terminals of the plurality of conversion branches are connected in parallel, and the output terminals of the plurality of conversion branches are connected in series. An output voltage of the power conversion device is a sum of voltages at the output terminals of the plurality of conversion branches. The plurality of conversion branches are controlled to enter an operating state or a non-operating state, so as to make the output voltage of the power conversion device adjustable and continuous.

Abstract: An energy-feedback clamping circuit of a power converter is proposed. The converter includes a transformer coupled to a full-wave rectifier circuit. The clamping circuit includes: two clamping diodes having two anodes coupled to each other at a common-anode terminal and two cathodes coupled to two terminals of a secondary winding of the transformer, a first clamping capacitor having a first terminal coupled to a cathode of a first rectifying diode of the rectifier circuit and a second terminal coupled to the common-anode terminal, a second clamping capacitor having a first terminal coupled to a connecting node of the output filtering inductor and capacitor of the rectifier circuit and a second terminal coupled to the common-anode terminal, and a converter circuit having an input terminal coupled to the second clamping capacitor and an output terminal for offering a power source.

Abstract: An apparatus for preventing a boost converter from an abnormal operation is provided. The boost converter includes a transformer, a full-wave rectifier circuit electrically connected to a secondary winding of the transformer, an output filter inductor, an output filter capacitor, a clamping circuit having two clamping diodes with two anodes electrically connected to each other to form a common-anode terminal, a first clamping capacitor with a first terminal electrically connected to a node joining the filter inductor and the filter capacitor, and a second terminal electrically connected to the common-anode terminal, and an energy recycle circuit, and the apparatus includes a controllable voltage source having a first terminal electrically connected to the node and a second terminal electrically connected to the energy recycle circuit.

Abstract: An input stage circuit of a three-level DC/DC converter is provided. The input stage circuit uses metal-oxide-semiconductor field effect transistors (MOSFETs) to discharge a flying capacitor to maintain the voltage across the flying capacitor at a half of the input voltage. Not only can the input stage circuit solve the high voltage issue across the flying capacitor in the prior art, but the circuit is able to operate normally without increasing power consumption during discharging, thereby avoiding problems of the prior art.

Abstract: An input stage circuit of a three-level DC/DC converter is provided. The input stage circuit uses metal-oxide-semiconductor field effect transistors (MOSFETs) to discharge a flying capacitor to maintain the voltage across the flying capacitor at a half of the input voltage. Not only can the input stage circuit solve the high voltage issue across the flying capacitor in the prior art, but the circuit is able to operate normally without increasing power consumption during discharging, thereby avoiding problems of the prior art.