Abstract: A power converter includes semiconductor modules, a capacitor, a circuit board, a casing, a busbar and a shield layer. The capacitor is electrically connected to the semiconductor modules. The casing accommodates the circuit board, the semiconductor modules and the capacitor. The busbar has an input terminal portion, an output terminal portion and an electric pathway connecting the input terminal portion and the output terminal portion. The electric pathway is connected to at least one of electronic components including the semiconductor modules and the capacitor. The busbar has a built-in portion incorporated into the casing. The shield layer is electrically conductive and provided on an inner surface or an outer surface of the casing such that the shield layer covers the built-in portion.

Abstract: The present disclosure provides an exemplary three-phase multi-tap balancing distribution transformer capable of operation with both balanced and unbalanced loads and that provides a wide range of incremental voltages to compensate for the varying voltage drops and imbalances as the attached conductor length increases and allows users the ability to incrementally and independently adjust the voltage specifically feeding a specific phase. Incremental adjustment is achieved via the transformer and without any fragile or other external devices or components between the power source and load-side equipment terminals. The transformer, through the use of at least one phase-specific tap-change switch is capable of directly controlling the secondary voltage of the applicable phase independently from the other phases and, thus, does not affect the voltage on the other phases.

Abstract: An inverter with a rated power of at least 3 kVA includes a first assembly which includes a first printed circuit board and a DC/AC converter stage, and a second assembly which includes a second printed circuit board and an EMC filter for the DC/AC converter stage. The first printed circuit board is mounted on a heat sink and lies substantially flat on the heat sink, and the DC/AC converter stage has converter components which comprise power semiconductors, chokes and link circuit capacitors. The chokes and the link circuit capacitors are arranged together on one side of the first printed circuit board, and the heat sink is arranged on the opposite side of the first printed circuit board, and the chokes and/or the power semiconductors are thermally connected to the heat sink via the first printed circuit board and a thermally conductive material arranged between the first printed circuit board and the heat sink.

Abstract: One or more aspects of the techniques and designs described herein may be implemented to provide (e.g., to design, produce, etc.) improved voltage dividers (e.g., more accurate and efficient resistor voltage divider networks). For example, the present disclosure may enable voltage dividers (e.g., resistor voltage divider networks) with a high ratio, such as with a voltage divider ratio K on the order of 100 or more, using a plurality of nominally-identical resistor elements (e.g., such that a significant portion of non-ideal behaviors cancel out and remaining non-ideal behaviors are reduced by statistical averaging). For instance, accurate resistor voltage divider networks may be designed and built using an input resistor having N nominally-identical resistor elements in series and an output resistor having M such resistor elements in parallel. In some examples, an operational amplifier may also be coupled in parallel to the multiplicity of M resistor element strings.

Abstract: A method for an auxiliary device of an auxiliary resonant commutated pole inverter (ARCPI) to determine a boosting time of the ARCPI is provided. The auxiliary device includes an auxiliary switch path that uses a resonant inductor with at least one saturable inductor. The method includes: calculating, by a processor of the auxiliary device, a first boosting time in the auxiliary switch path based on a theoretical resonance inductance and a voltage that are applied to the resonant inductor; determining, by the processor, a second boosting time in the auxiliary switch path based on a look-up table; and determining, by the processor, the boosting time in the auxiliary switch path based on the first boosting time and the second boosting time. The method further includes controlling, by the processor, boosting current of the ARCPI based on the boosting time in the auxiliary switch path.

Abstract: A fly-back converter and method of operating is provided to eliminate cross-conduction between a power-switch (PS) on a primary side of a transformer and a synchronous-rectifier (SR) on a secondary side when operating in continuous conduction mode. Generally, the method includes turning on the SR when a drain voltage of the SR drops to a negative voltage followed by a rise in the SR-drain-voltage at a first slope as a current is drawn from the secondary side of the transformer through the SR. When the PS is turned on before the transformer is completely discharged cross-conduction causes a change in the rise of the drain voltage to a second slope greater than the first slope. By turning off the SR within 50 ns of the change in the rise of the drain voltage, cross-conduction is minimized or eliminated without receiving turn-on information from a controller operating the PS.

Abstract: Various embodiments of the teachings herein include a power converter. The power converter may include: a converter for converting between a first electrical voltage and a second electrical voltage; a common mode filter having a common mode transformer; and a second winding connected to a frequency-selective passive damping circuit arranged on a common core. The common mode transformer has at least two first windings arranged in the same direction on the common core and coupled in series into electrical conductors connected to the converter device.

Abstract: A soft-switching Phase-Shift Full-Bridge (PSFB) converter system may include a transformer comprising a primary side and a secondary side. Phase-leading circuitry and phase-lagging circuitry may be located on the primary side of the transformer. The phase leading a phase lagging circuitry may include one or more bridge switches. The system may further include clamping circuitry coupled to the secondary side of the transformer. The clamping circuitry configurable to, when in an active clamping mode, short the secondary side of the transformer. An inductance may be included on the primary side of the transformer to collect and store energy from an input source when the secondary side of the transformer is shorted. The energy stored in the inductance may be used to enable soft-switching of the bridge switches in the phase-lagging circuitry during a dead time or a circulating time of the bridge switches in the phase-leading circuitry.

Abstract: In discharging of electric power in a smoothing capacitor arranged between a battery and an inverter provided with three-phase power modules, a control circuit alternately and periodically switches between all-phase upper on control and all-phase lower on control. With a power module in which a current flows in a direction from a motor toward the inverter among the three-phase power modules being defined as a negative current module and a power module in which a current flows in a direction from the inverter toward the motor being defined as a positive current module, during a period during which switching between all-phase lower on control and all-phase upper on control is made, the control circuit performs, for a prescribed time period, discharging processing for setting the negative current module to the lower on state and for setting the positive current module to the upper on state.

Abstract: Apparatuses, devices, and methods for operating a multi-level voltage converter are described. A semiconductor device can include a circuit, where the circuit can include a plurality of current sources. The circuit can be configured to measure a flying capacitor voltage across a flying capacitor of a multi-level voltage converter. The circuit can be further configured to compare the flying capacitor voltage with a voltage level equivalent to an intermediate voltage that is between ground and an input voltage being provided to the multi-level voltage converter. The circuit can be further configured to, based on a result of the comparison, switch a current source among the plurality of current sources to maintain the flying capacitor voltage at the intermediate voltage.

Abstract: The present disclosure provides for a hybrid DC-DC, Hybrid Variable Switched Capacitor (HVSC) power converter. The converter may include one or more power switching networks supporting a plurality of power conversion modes and characterised in that: an input terminal connected to an input power source and an associated input capacitance, an output terminal connected to a load and an associated output capacitance to obtain a desired output voltage or output load current regulation; and at least six switches, one or more inductors and one or more flying capacitors. The converter addresses the problems faced by inductor-based and inductor-less DC-DC power converters while providing higher power conversion efficiencies alike the inductor-less switched capacitor converters and voltage/current regulation alike the inductor-based power converters in a single power conversion unit and enable a duty cycle-based output voltage/current regulation.

Abstract: A control circuit, system and method for switched-mode power supply are disclosed, the control circuit is for driving a first switch to convert an input voltage into an output voltage. The control circuit includes an on-time control unit, which receives a first signal characterizing switching frequency of first switch and a second signal characterizing current flowing through first switch and responsively generates a signal indicative of a turn-off instant for first switch. When a peak value of the current flowing through the first switch drops below a predefined value, the on-time control unit determines the turn-off instant for the first switch based on the first signal so that the switching frequency of the first switch is maintained at a target frequency. This design can effectively avoid the generation of audible noise, stabilize the output voltage against load changes while maintaining desirable efficiency, and ensure operational safety of the switched-mode power supply.

Abstract: In one embodiment, an apparatus includes a first die with voltage regulator circuitry and a second die with logic circuitry. The apparatus further includes an inductor, a capacitor, and a conformal power delivery structure on the top side of the apparatus, where the voltage regulator circuitry is connected to the logic circuitry through the inductor, the capacitor, and the conformal power delivery structure. The conformal power delivery structure includes a first electrically conductive layer defining one or more recesses, a second electrically conductive layer at least partially within the recesses of the first electrically conductive layer and having a lower surface that generally conforms with the upper surface of the first electrically conductive layer, and a dielectric material between the surfaces of the first electrically conductive layer and the second electrically conductive layer that conform with one another.

Abstract: Embodiments of this application provide a power conversion circuit, a power transmission system, and a photovoltaic device. The power conversion circuit includes: a first bridge arm, where the first bridge arm includes a first upper bridge arm and a first lower bridge arm; the first upper bridge arm includes a switching component connected between an input positive end and an output end; the first lower bridge arm includes a switching component connected between the output end and an input negative end; each of the switching components includes a switching transistor and a first diode anti-parallel connected to the switching transistor.

Abstract: A circuit breaker device protects an electric low-voltage current circuit. A level of a voltage of a low-voltage current circuit is ascertained such that ascertained voltage values are provided. A differential voltage is ascertained from the ascertained voltage values and an expected value of the voltage such that differential voltage values are provided incrementally. Each differential voltage value is compared with a first threshold, and if at least two successive differential voltage values exceed the threshold, an interruption of the low-voltage current circuit is initiated by semiconductor-based switching elements, which are set to a high-ohmic state, in order to protect the low-voltage current circuit from a short-circuit.

Abstract: An example electric circuit includes a superconductor component having a first terminal at a first end and a second terminal at a second end. The superconductor component includes a first portion coupled to the first terminal, a second portion coupled to the second terminal, and a third portion coupling the first portion and the second portion. The third portion has a curved shape such that the first portion of the superconductor component is proximate to, and thermally coupled to, the second portion of the superconductor component. The example electric circuit further includes a coupling component coupled to the third portion of the superconductor component, and a gate component configured to generate a resistive heat that exceeds a superconducting threshold temperature of the superconductor component, where the gate component is separated from the superconductor component by the coupling component.

Abstract: A three-level buck converter circuit configurable to transition between a three-level buck converter mode and a two-level buck converter mode and methods for regulating power using such a circuit. One example power supply circuit generally includes a three-level buck converter circuit and a control circuit coupled to the three-level buck converter circuit and configured to control operation of the three-level buck converter circuit between a three-level buck converter mode and a two-level buck converter mode. The three-level buck converter circuit generally includes a first switch, a second switch coupled to the first switch via a first node, a third switch coupled to the second switch via a second node, a fourth switch coupled to the third switch via a third node, a first capacitive element coupled between the first node and the third node, and an inductive element coupled between the second node and an output node.

Abstract: A power conversion circuit includes a first capacitor coupled between an input terminal and a reference potential, a second capacitor coupled between an output terminal and a reference potential, an inductor coupled between the input terminal and the output terminal, storing magnetic field energy when at least part of an input current and a current output from the first capacitor flows through the inductor as a first current, and inducing a second current for charging the second capacitor by the magnetic field energy, and a switching element that is turned on and off at a substantially constant cycle, has a substantially constant period during which the switching element is ON in one cycle, is turned on to cause the first current to flow through the inductor, and is OFF when the second current flows through the inductor.

Abstract: An apparatus may include a first switch leg connected between a first input terminal and an output terminal, the first switch leg comprising a first switch. The apparatus may also include a second switch leg connected between a second input terminal and the output terminal, the second switch leg comprising a second switch. The apparatus may further include a third switch leg connected between an input voltage midpoint node and the output terminal. A control circuit may control the first switch leg, the second switch leg, and the third switch leg.

Abstract: A control circuit for a voltage regulator has an energy regulation circuit and a switching control circuit. The energy regulation circuit provides a regulation signal based on an output voltage, an output current, and a maximum energy reference. The maximum energy reference decreases with increasing of an ambient temperature and increases with decreasing of the ambient temperature. The switching control circuit provides a switching control signal based on the regulation signal to turn ON and turn OFF at least one switch of a plurality of switches of the voltage regulator, such that the output voltage and the output current satisfy a first relationship when the ambient temperature equals a first temperature value, and the output voltage and the output current satisfy a second relationship when the ambient temperature equals a second temperature value.