Abstract: A power conversion system including a triple active bridge (TAB) is provided. The system includes a power factor correction (PFC) module and a three port converter (TPC) module, with no post-regulation or additional stages required. The TPC module includes an OBC full-bridge and an APM full-bridge, each being inductively coupled to the output of the PFC full-bridge, thereby forming the TAB. The OBC full-bridge is adapted to convert an AC input into a high-voltage DC output for a high-voltage battery, and the APM full-bridge is adapted to convert an AC input into a low-voltage DC output for a low-voltage battery. The power conversion system can accept a single-phase AC input and a three-phase AC input, has a lower current stress as compared to prior art TPCs, and freely transfers power from among any ports.

Abstract: A power converter includes: a solid-state transformer having a DC input and isolated DC outputs; a half bridge converter stage for each isolated DC output of the solid-state transformer, wherein an input of each half bridge converter stage is connected to the corresponding isolated DC output and an output of the half bridge converter stages are electrically connected in a cascade configuration; an output inductor shared by the half bridge converter stages and configured to deliver an output current; and a controller configured to implement phase shift control of the half bridge converter stages relative to one another, based on the number of half bridge converter stages and an output voltage of the power converter being regulated, such that each half bridge converter stage processes the full output current but only a fraction of the output voltage. Methods of controlling the power converter are also described.

Abstract: Power-electronic systems and components thereof such as electrical-energy storage apparatuses/subsystems in the form of supercapacitors and power-electronic apparatuses/subsystems are disclosed. A supercapacitor has a conductive or semi-conductive first metasurface layer, a conductive or semi-conductive second metasurface layer, and a dielectric layer sandwiched between the first and the second metasurface layers for electrically insulating the first metasurface layer from the second metasurface layer. An electrical power conversion apparatus has a first power conversion circuitry for converting a first portion of electrical power received from an electrical power source and outputting the converted electrical power via an output.

Abstract: A novel converter circuit topology is disclosed. The converter circuit has a bridge circuit, a transformer, and a half-bridge current-doubler rectifier. An input end of the bridge circuit is connected to an input voltage node of the converter circuit. A reference end of the bridge circuit is connected to an output voltage node of the converter circuit. Opposing ends of a primary winding of the transformer are connected to bridge nodes of the bridge circuit. A secondary winding of the transformer serves as current-doubler inductors of the half-bridge current-doubler rectifier. A tap of the secondary winding is connected to the reference end of the bridge circuit.

Abstract: The present invention generally relates to a modular high power bi-directional half bridge buck/boost converter assembly and, in particular, to a system for converting power from one form of current (either AC or DC) to a differing level of voltage, either lower (buck) or higher (boost), to output a wave signal based on pulse wave modulation (PWM) switching control by means of an external digital controller and methods of operation. In particular, an inverter-converter system includes at least one half bridge module including a plurality of circuit components, at least one inductor which is connected to the at least one half bridge module and a power supply, and a controller which is configured to receive and send instructions to the at least one half bridge module for converting an input voltage to an output voltage and dynamically tune switching frequencies based on a load of the inverter-converter system.

Abstract: An air conditioning device includes a buck converter which comprises a switching device, an inductor, a diode and at least one capacitor. The diode is a SiC diode, and the buck converter further includes an attenuator associated to the SiC diode and a ferrite bead associated to the switching device.

Abstract: A power conversion device includes a power converter connected to a power storage element, and a control device. The control device includes a generator simulating unit to generate a voltage command value, and a signal generating unit to generate a control signal for the power converter based on the voltage command value. The generator simulating unit includes a first characteristics simulating unit to generate a first command value by simulating characteristics of a first synchronous generator, a second characteristics simulating unit to generate a second command value by simulating characteristics of a second synchronous generator different from the characteristics of the first synchronous generator, an adder to perform addition of the first command value and the second command value, and a voltage command generating unit to generate the voltage command value, based on an addition result of the first command value and the second command value.

Abstract: Bonding a full-bridge device and an LLC device in a stack, or forming the full-bridge device and the LLC device on a same substrate, rather than connecting the devices, reduces a chip area associated with a power converter including the full-bridge device and the LLC device. Additionally, the full-bridge device and the LLC device consume less power because parasitic inductance and capacitance are reduced. Additionally, raw materials and production time are conserved that would otherwise have been used to connect the full-bridge device and the LLC device (e.g., via wires).

Abstract: Provided is a power conversion device that can be realized with a small circuit and is capable of stably converting AC power inputted from a three-phase power source system into DC power. In a power conversion device: an output terminal of a common converter cell in a J-numbered stage is connected, together with output terminals of common converter cells of the other two phases, to common lines; an output terminal of an independent converter cell in a K-numbered stage is connected to independent lines independently of converter cells of the other two phases; and a plurality of switches comprise a common switch for switching the connection relationship between the common lines and DC buses, and an independent switch for switching the connection relationship between the independent lines and DC buses.

Abstract: An apparatus for conversion between AC and DC voltages includes a rectifier and first and second stages coupled to each other and having a regulator and a switched-capacitor circuit respectively. The first stage receives a first voltage from the rectifier and the second stage provides a second voltage. A controller controls the first and second stages.

Abstract: The present disclosure includes an inverter connected to a power supply unit via a positive electrode side electrical path and a negative electrode side electrical path and including switching elements, a rotary electric machine including windings connected to each other at a neutral point and inputting and outputting power from and to the power supply unit via the inverter, a connection path electrically connecting an intermediate point between the storage batteries of the power supply unit to the neutral point of the windings, and a device including a first terminal and a second terminal enabling energization between the power supply unit and the device. The first terminal is connected to the connection path, and the second terminal is connected to at least one of the positive electrode side electrical path and the negative electrode side electrical path.

Abstract: This power conversion device includes a control unit that controls a switching operation of a switching element of the inverter unit. The control unit is configured to switch between frequency modulation control and phase shift control, based on the output from the output converter unit, and execute. Then, the control unit is configured to, when switching between frequency modulation control and phase shift control, execute overlap control for executing the phase shift control while executing the frequency modulation control, in a predetermined switching operation range.

Abstract: Multiphase power converter with CLC resonant circuit. One example is a method of operation a power converter, the method including: charging, during a first on-time, a first output inductor by way of a first switching-tank circuit defining a first switch node coupled to a first lead of a resonant inductor; creating, during the first on-time, a first current flow into the first switching-tank circuit through the resonant inductor; and then charging, during a second on-time, a second output inductor by way of a second switching-tank circuit defining a second switch node coupled to a second lead of the resonant inductor; and creating, during the second on-time, a second current flow into the second switching-tank circuit through the resonant inductor.

Abstract: A puff detection device (10) comprising a capacitive puff sensor (C2), a detection signal generator (140) for connection with the puff sensor (C2) and having an ESD diode (D2) at an input node (IN2), and a reference signal generator (120) which is configured to generate a train of reference pulses (CKI) having a reference frequency and comprises a reference capacitor (C1). The reference signal generator (120) includes a compensation device (D1) which is configured to provide a leakage current path at a charging node (IN1) of the reference capacitor (C1).

Abstract: A bidirectional power conversion system includes an isolated power converter having a first input connected to an output of a diode rectifier and a second input connected to an output of a power factor correction device. The power conversion system further comprises a plurality of switches and a plurality of diodes configured such that the plurality of switches and the plurality of diodes form the diode rectifier and the power factor correction device when the system is configured to deliver power from an AC power source to a DC load and the plurality of switches forms an inverter when the system is configured to deliver power from a DC power source to an AC load.

Abstract: A power management system includes a direct current-direct current DC-DC conversion circuit, a first control circuit, a charging circuit, an input port, and an output port. The input port is configured to receive an input voltage. The output port is configured to supply an output voltage to a load. The DC-DC conversion circuit is configured to charge the output port from the input port, to adjust the output voltage. The first control circuit is configured to: obtain a second feedback voltage of the output voltage from the output port, generate a first control signal based on the second feedback voltage and a second reference signal, and supply the first control signal to the charging circuit. The charging circuit charges the output port from the input port based on the first control signal, to supplementally adjust the output voltage.

Abstract: A heater and a cigarette device having the heater is provided. The heater includes a base having a surface, an infrared electric-heating coating layer disposed on the surface of the base, and a conductor including a first conducting part and a second conducting part disposed on the surface of the base. Both of the first conducting part and the second conducting part are at least partially electrically connected with the infrared electric-heating coating layer. The first conducting part includes a first electric conducting spiral section, and the second conducting part includes a second electric conducting spiral section. A spacing between the first electric conducting spiral section and the second electric conducting spiral section is not zero. Through the first and second electric conducting spiral sections disposed on the surface of the base, a path of electric currents flowing through the infrared electric-heating coating layer of the base is shorter.

Abstract: A power converter, includes: a first line to which a first voltage is applied; a second line to which a second voltage lower than the first voltage is applied; a third line to which a third voltage lower than the second voltage is applied; a first bridge circuit that is provided between the first line and the second line, the first bridge circuit including a plurality of first switching elements; a second bridge circuit that is provided between the second line and the third line, the second bridge circuit including a plurality of second switching elements; and a voltage output circuit configured to generate a predetermined direct current (DC) voltage based on operations of the first and second bridge circuits.

Abstract: A power converter includes a full-bridge circuit, power converting circuit, transformer, and controller. The full-bridge circuit includes a series-connected unit made of first and second switches and a series-connected unit made of third and fourth switches and is connected to power transmitting terminals. The power converting circuit is connected to power receiving terminals. The transformer includes power transmitting coil and power receiving coil. The power transmitting coil is connected to full-bridge circuit. The power receiving coil is connected to power converting circuit. The controller turns on the first and second switches alternately and also the third and fourth switches alternately. A resistive load is connected to the power receiving terminals. The controller serves to determine a phase difference between the time when first switch is turned on and the time when third switch is turned on to decrease with a decrease in measured voltage developed at the power receiving terminals.

Abstract: The invention relates to a power converter (300) which is designed to receive an input voltage (350) and output and output voltage (360). The power converter comprises multiple switches (371, . . . , 387). The power converter also comprises a control unit which is connected to the multiple switches, wherein the control unit is designed to control the multiple switches of the power converter based on data in a database using an input parameter or an output parameter. The invention also relates to a method for operating a power converter. The method comprises the step of controlling multiple switches of the power converter using a control unit, which is connected to the multiple switches, based on data in a database using an input parameter or an output parameter.

Abstract: A retinomorphic sensor array and a convolution method are used for image processing therefor, wherein the optoelectronic sensor has a vertically stacked heterostructure provided with a bottom electrode, a dielectric layer, a channel layer, a source electrode and a drain electrode on a base, the source and drain electrode are mutually opposite and are arranged at two ends of the channel layer, the bottom electrode, the source and drain electrode are made of a material used by a flexible electrode, an inert metal or a semimetal, the dielectric layer is made of an insulating material, the channel layer is made of a bipolar material, and the base comprises a substrate and an insulating material layer generated on a surface of the substrate.

Abstract: Power converters including electronic-embedded transformers for current sharing and load-independent voltage gain are described. In one example, a power converter system includes an input, an output, a power converter between the input and output, and a controller. The converter includes a first bridge, a second bridge, and an electronic-embedded transformer (EET) between the first and second bridge. The EET includes a capacitor and a capacitance coupling switch bridge. The controller generates switching control signals for the first and second bridges and phasing drive control signals for the capacitance coupling switch bridge in the EET. The controller applies a phase shift to the phasing drive control signals for the EET as compared to the switching control signals for the first and second bridges, so that the voltage across the capacitor in the EET cancels the leakage inductance of the transformer windings in the EET, at any switching frequency.

Abstract: A circuit includes an avalanche diode having an anode and a cathode. The circuit also includes a buffer stage having a buffer input, a power input and a buffer output, in which the buffer input is coupled to the anode, and the cathode is coupled to the power input. The circuit includes a transistor coupled between the power input and a clamp output. The transistor has a control input coupled to the buffer output, and a loop circuit is coupled between the buffer output and the buffer input. A capacitor is coupled between the buffer input and an output terminal.

Abstract: In accordance with one embodiment is a transformer with a core comprising a perimeter portion and central intervening portion. The central intervening portion is separated from the perimeter portion by air gaps, creating an opening on either side of the intervening portion. A primary winding and secondary winding are wound around the central intervening portion of the core. The primary winding is capable of electromagnetic interaction with the secondary winding. A pair of ferrite members arranged outward from a central axis of the central intervening portion of the core and increases a series inductance with the primary winding. In accordance with another aspect of the disclosure, each ferrite member may have an air gap associated with the core to facilitate heat dissipation from the transformer.

Abstract: An adaptive load optimization method for a resonant gate drive circuit is provided to optimize the switching loss, turn-on loss and gate drive loss under different MOSFET loads. A data table is pre-stored in a digital signal processor chip (DSP), and voltages and pre-charge times, corresponding to a low total loss, of the resonant gate driver obtained by actual tests in case of different load currents are recorded in the data table; and in actual application, after an analog-to-digital converter terminal (ADC) samples a load current, a load current, closest to the sampled load current, is read from the data table, and the digital signal processor chip (DSP) is enabled to perform table look-up to obtain an optimized voltage and pre-charge time of a gate drive circuit.

Abstract: A power converter is disclosed. The power converter includes a positive power supply, an output node, first, second, and third high side transistors serially connected between the positive power supply and the output node, and a high side bias voltage generator configured to generate a high side bias voltage. A gate of the second high side transistor is connected to the high side bias voltage generator. The power converter also includes a signal driver configured to selectively connect a gate of the first transistor to either the positive power supply or the high side bias voltage generator, a switch configured to selectively connect a gate of the third transistor to the high side bias voltage generator, and a capacitor connected to the gate of the third transistor and to a source of the second high side transistor.

Abstract: A DC/DC converter includes an inverter circuit, a transformer, a first rectifier circuit, a second rectifier circuit, and a voltage management circuit. The transformer includes a first primary-side winding, a first secondary-side winding, and a second secondary-side winding. Two terminals of the first primary-side winding are respectively connected to a first output terminal and a second output terminal of the inverter circuit, two terminals of the first secondary-side winding are connected to two input terminals of the first rectifier circuit, and two terminals of the second secondary-side winding are connected to two input terminals of the second rectifier circuit. The voltage management circuit controls an output terminal of the first rectifier circuit, an output terminal of the second rectifier circuit, and an output terminal of the DC/DC converter to be in a first connection relationship in a first sub-cycle of a first working cycle.

Abstract: A control circuit for an electrostatic machine includes a current source or sink, an inductor, a switching network coupled between the current source or sink and the electrostatic machine, and between the inductor and the electrostatic machine. A controller is configured to automatically cause the switching network to connect the current source or sink to the electrostatic machine each half-cycle of a periodically alternating polarity. At each polarity alternation, the electrostatic machine is isolated from the current source or sink for a first period of time. At each polarity alternation, the inductor is connected to the electrostatic machine for a second period of time while the electrostatic machine is isolated from the current source or sink, and then disconnect the inductor from the electrostatic machine.

Abstract: An embodiment apparatus includes a converter including a plurality of switching elements configured as a bridge circuit connected to an input terminal and having a plurality of bridge arms, wherein a topology of the converter is configured to be switchable to a full-bridge type topology or a half-bridge type topology, and wherein a resonant capacitor is connected to a midpoint between respective ones of the bridge arms, and a controller configured to switch the topology of the converter to the full-bridge type or the half-bridge type by controlling whether the resonant capacitor is activated based on a load current of the converter.

Abstract: An LLC resonant converter includes a switching circuit for converting a DC voltage into switching signal, a resonant tank coupled to the switching circuit to receive the switching signal and to provide a primary current, a transformer circuit coupled to the resonant tank. The transformer circuit includes a plurality of separated transformers, each has a primary side and a secondary side windings disposed on the PCB, where the primary side winding of each transformer can be selected to couple in series or in parallel with the primary side winding of other transformers to form a dynamically varied equivalent primary side winding, maintaining the turns ratio to fine-tune the resonant tank. The gain curve of the LLC converter can be adjusted by electrically coupling an external excitation inductor, a resonant capacitor or a resonant inductor to the resonant tank, according to the demand of output current.

Abstract: Systems, methods and apparatus for wireless charging are disclosed. A charging device has a resonant circuit comprising one or more transmitting coils, a driver circuit configured to provide a charging current to the resonant circuit, a zero-crossing detector configured to provide a zero-crossing signal that includes edges corresponding to transitions of a voltage measured across the resonant circuit through a zero volt level or corresponding to transitions of a current in the resonant circuit through a zero ampere level and an Amplitude Shift Keying demodulator. The demodulator may be configured to receive a plurality of samples of voltage or current in the resonant circuit captured at times determined by the edges included in the zero-crossing signal, and demodulate a modulated signal obtained from the charging current using the plurality of samples of voltage or current in the resonant circuit.

Abstract: A power expanding apparatus for three-phase LLC circuit is disclosed, which includes full-bridge switching networks, resonant networks, transformer networks, and rectifying networks. A primary side of a first transformer network is connected with an input voltage sequentially through a first resonant network and a first full-bridge switching network, a secondary side of the first transformer network is connected with a load through a first rectifying network; a primary side of a second transformer network is connected with the input voltage sequentially through a second resonant network and a second full-bridge switching network, and a secondary side of the second transformer network is connected with the load through a second rectifying network. Secondary sides of two transformer units in the first transformer network are in star-type connection with a secondary side of one transformer unit in the second transformer network.

Abstract: Embodiments of this application disclose an asymmetrical half-bridge flyback converter and a power supply system, to reduce a loss of the asymmetrical half-bridge flyback converter, and improve efficiency of the asymmetrical half-bridge flyback converter. The asymmetrical half-bridge flyback converter, including: a first power transistor, a second power transistor, a primary-side resonant capacitor, a transformer, a third power transistor, and a secondary-side resonant capacitor, where the first power transistor and the second power transistor are coupled to two terminals of a direct current power supply after being connected in series; and a primary side of the transformer is connected in parallel to two terminals of the first power transistor through the primary-side resonant capacitor, and a secondary side of the transformer is coupled to the third power transistor and the secondary-side resonant capacitor.

Abstract: According to one embodiment, an inrush current suppression circuit includes a normally-on transistor, a normally-off transistor connected in series with the normally-on transistor, a first drive circuit that drives the normally-on transistor, a second drive circuit that drives the normally-off transistor, a diode connected between an output of the first drive circuit and an output terminal of the normally-off transistor, a first power source smoothing circuit that performs smoothing of a source current to be supplied to the first drive circuit and the second drive circuit, and a switch circuit that switches connection/disconnection of a current path passing through the first power source smoothing circuit.

Abstract: A synchronous average harmonic current controller for a line connected bidirectional resonant power converter results in a harmonic voltage gain closely related to the commanded bridge duty cycles. A primary bridge has its duty cycle set to achieve controlled line power transfer and voltage regulation of a primary bus energy storage capacitor. A secondary bridge circuit has its duty cycle set to achieve voltage regulation of secondary bus energy storage capacitor. A first embodiment uses the independent energy storage elements to achieve power factor correction and low noise regulation using a single stage. A second embodiment uses feedforward duty cycle control to achieve isolated voltage regulation using the well-defined voltage gain resulting from the synchronous average harmonic current controller.

Abstract: Power module includes transformer unit including primary and secondary windings and magnetic core; first and second capacitor units coupled to first terminal of primary winding of transformer unit through first node; first and second external pins respectively coupled to first terminal of first capacitor unit and second terminal of second capacitor unit; first and second switch units coupled to second terminal of primary winding of transformer unit thorough second node; third and fourth external pins respectively coupled to first terminal of first switch unit and second terminal of second switch unit; secondary-side circuit coupled to secondary winding; and fifth and sixth external pins electrically coupled to first and second output terminals of secondary-side circuit, respectively. First external pin is coupled to one of third and fourth external pins selectively.

Abstract: A power supply includes a first converter configured to convert an input voltage into a first output voltage, a first feedback circuit configured to output a first pulse width modulation (PWM) signal to the first converter to control a level of the first output voltage, and a mode controller configured to compare the input voltage and a reference voltage and determine whether the first converter operates in a first mode or a second mode based on the compared result. When the input voltage is less than or equal to the reference voltage, the first converter boosts the input voltage and outputs the boosted voltage as the first output voltage in the first mode. Further, when the input voltage is greater than the reference voltage, the first converter bypasses the input voltage and outputs the bypassed voltage as the first output voltage in the second mode.

Abstract: A method for monitoring operation of a controller area network (CAN) comprising a plurality of nodes. The method comprises measuring a voltage associated with a CAN message transmitted on the network, determining a message signature in dependence on the measured voltage, and comparing the message signature with a node signature to determine the authenticity of the CAN message. One or more actions may be taken in dependence on the determined authenticity.

Abstract: A bidirectional voltage converter that includes a transformer, a first bridge circuit, a second bridge circuit and a controller is introduced. The first bridge circuit is coupled to a first side of the transformer and a first voltage source, and the first bridge circuit comprises a first switch, a second switch, a third switch and a fourth switch. The second bridge circuit is coupled to a second side of the transformer and a second voltage source. The controller is configured to set the first bridge circuit to a half-bridge configuration by turning off the third switch, turning on the fourth switch, and alternately turning on and off the first switch and the second switch in response to determining that a voltage of the second voltage source is less than a predetermined threshold. An operation method of the bidirectional voltage converter is also introduced.

Abstract: A resonance conversion device and a universal serial bus circuit are provided. The resonance conversion device includes an input filter circuit, a full-bridge LLC converter circuit, a transformer circuit, a rectifier filter circuit, and a controller. The controller is configured to determine whether an indication voltage of a voltage command is less than or equal to a threshold value and to perform the following steps: in response to the indication voltage being less than or equal to the threshold value, controlling the full-bridge LLC converter circuit into a half-bridge operation mode, and regulating the DC output voltage by performing half-bridge burst mode control on the full-bridge LLC converter circuit based on the DC output voltage; and in response to the indication voltage being greater than the threshold value, regulating the DC output voltage by performing full-bridge burst mode control on the full-bridge LLC converter circuit based on the DC output voltage.

Abstract: A bridge rectifier and associated control circuitry collectively form a “regtifier” which rectifies an input time varying voltage and regulates the rectified output voltage produced without the use of a traditional voltage regulator. To accomplish this, the gate voltages of transistors of the bridge rectifier that are on during a given phase may be modulated via analog control (to increase the on-resistance of those transistors) or via pulse width modulation (to turn off those transistors prior to the end of the phase). The transistors of the bridge rectifier that would otherwise be off during a given phase may be turned on to help dissipate excess power and thereby regulate the output voltage. This modulation is based upon both a voltage feedback signal and a current feedback signal.

Abstract: A bridge rectifier is controlled by control circuitry to act a “regtifier” which both regulates and rectifies without the use of a traditional voltage regulator. To accomplish this, the gate voltages of transistors of the bridge that are on during a given phase may be modulated to dissipate excess power. Gate voltages of transistors of the bridge that are off during the given phase may alternatively or additionally be modulated to dissipate excess power. The regtifier may act as two half-bridges that each power a different voltage converter, with those voltage converters powering a battery. The voltage converters may be switched capacitor voltage converters that switch synchronously with switching of the two half-bridges as they perform rectification.

Abstract: A battery charging apparatus includes a bi-directional charger including a first switching circuit connected to an AC terminal, a second switching circuit connected to a battery, and a transformer connected between the first switching circuit and the second switching circuit. The battery charging apparatus also includes a controller configured to switch a leg included in the first switching circuit based on a first carrier wave and a first duty command, configured to switch a leg included in the second switching circuit based on a second carrier wave and a second duty command, configured to adjust a phase of the second carrier wave compared to a phase of the first carrier wave by a phase shift angle according to an active power command, and configured to adjust a phase of the second duty command according to the reactive power command.

Abstract: A multiwinding transformer includes a primary-side winding and a plurality of secondary-side windings. A primary-side bridge circuit is connected between a primary-side DC terminal and the primary-side winding. A plurality of secondary-side bridge circuits are connected between the plurality of secondary-side windings and a plurality of secondary-side DC terminals, respectively. A switching converter variably controls a first DC voltage of the primary-side DC terminal or a second DC voltage of a first secondary-side DC terminal among the plurality of secondary-side DC terminals such that a voltage ratio between the first DC voltage and the second DC voltage is controlled to a constant ratio in accordance with a turns ratio between the primary-side winding and the secondary-side winding corresponding to the first secondary-side DC terminal among the plurality of secondary-side windings.

Abstract: A bridge circuit including: first and second high-side switches; first and second low-side switches; a transformer having primary and secondary coils; a coil; and a current injection device; wherein the first high-side switch and the first low-side switch are connected at a first bridge terminal in a series circuit to form a first branch; the second high-side switch and the second low-side switch are connected at a second bridge terminal in a series circuit to form a second branch; the first and second branches are connected in a parallel circuit at first and second input terminals; the secondary coil has first and second output terminals; the primary coil and the coil are connected in a series circuit to connect the first bridge terminal to the second bridge terminal; and wherein the current injection device is configured to inject a predetermined current into the coil at a predetermined point in time.

Abstract: A half-bridge flyback power converter: a first transistor, a second transistor and a third transistor which form a half-bridge circuit. The first transistor is turned on for generating a negative circulated current for achieving zero voltage switching of the second transistor. The second transistor is turned on for magnetizing a transformer. The third transistor is turned on during a demagnetized time period to generate an output voltage. The physical size of the first transistor is smaller than physical size of the third transistor.

Abstract: The teachings herein include DC/DC converter systems. An example system may include: a full-bridge converter and a switch control circuit. The converter includes a primary side and a secondary side full-bridge circuit and a transformer. AC nodes of the primary side are connected to a primary side of the transformer and AC nodes of the secondary side to a secondary side of the transformer. The switch control circuit: controls the primary side and the secondary side circuits in a normal operating phase including modulation of an input voltage by the primary side full-bridge circuit transferring power via the transformer, control the primary side and the secondary side in a free-wheeling phase during which they are both deactivated to reduce the transformer's magnetization current; and control the full-bridge circuits to switch between the normal operating phase and the free-wheeling phase alternately.

Abstract: An inverter circuit receives an AC input signal and uses at least two bidirectional switches between the input terminals and a junction node to perform the electrical inversion function. A resonant circuit is formed by a primary side inductor between the junction node and a second node and a capacitor arrangement between the second node and the input terminals.

Abstract: An inductive electronic identification device and a power-supply-compensation circuit of the same are provided. The power-supply-compensation circuit has a power supply unit and a compensation circuit, and connects to a load unit for supplying the load unit to operate. The compensation circuit receives the compensation signal from the load unit, so that the voltage regulator of the compensation circuit controls the voltage rise and fall of one end of the capacitor of the compensation circuit. The capacitive element switches to the charging or discharging mode according to the power consumption of the load unit. In this way, electrical charges are stored when the load unit consumes less power, and compensation current is provided when the load unit consumes more power, so as to maintain the normal operation of the load unit.

Abstract: The resonant tank circuit (102) comprises: a transformer (T); a primary circuit (M1); and a secondary circuit (M2); wherein the transformer (T) and the primary and secondary circuits (M1, M2) are designed to operate in a forward mode and in a reverse mode; and wherein the transformer (T) and the primary and secondary circuits (M1, M2) have, at a resonant frequency (FR), a forward gain (GF(FR)), respectively a reverse gain (GR(FR)), essentially independent of the load, when operating in the forward mode, respectively the reverse mode. The primary and secondary circuits (M1, M2) are different one from another and the forward gain (GF(FR)) and the reverse gain (GR(FR)) at the resonant frequency (FR) are essentially equal to one another, notably to within 5%.