Abstract: A soft-switching power converter includes a main switch, an energy-releasing switch, and an inductive coupled unit. The main switch is a controllable switch. The energy-releasing switch is coupled to the main switch. The inductive coupled unit is coupled to the main switch and the energy-releasing switch. The inductive coupled unit includes a first inductance, a second inductance coupled to the first inductance, and an auxiliary switch unit. The auxiliary switch unit is coupled to the second inductance to form a closed loop. The main switch and the energy-releasing switch are alternately turned on and turned off. The auxiliary switch unit is controlled to start turning on before the main switch is turned on so as to provide at least one current path.

Abstract: In a first section of a power conversion device, a second switch is turned off, a first duty drec and a third duty dz are selected so that a direct current voltage Vdc to be input to a current source becomes equal to a direct current voltage command value Vdc*, a first conversion operation of supplying power from the voltage source to the current source is performed, and the capacitor is charged by the rectified voltage via the clamp diode. In a second section of the power conversion device, a first switch is turned off, a second duty dc and the third duty dz are selected so that the direct current voltage Vdc to be input to the current source becomes equal to the direct current voltage command value Vdc*, and a second conversion operation of supplying power from the capacitor to the current source is performed.

Abstract: An apparatus to insure safe behavior in an inverter system. In one embodiment, the apparatus includes a first high side gate driver, a first low side gate driver, a microcontroller configured to control the first high side and low side gate drivers. A voltage regulator provides a supply voltage to the microcontroller. A first pair of high side voltage regulators provide a first pair of high side supply voltages to the first high side gate driver. A first pair of low side voltage regulators provide a first pair of low side supply voltages to the first low side gate driver.

Abstract: An isolated gate driver has a first portion in a first voltage domain and a second portion in a second voltage domain. The first and second portions are coupled by an isolation communication channel. The isolated gate driver transmits across the isolation communication channel a serial word containing first drive strength information and simultaneously transmits gate information with the serial word across the isolation communication channel. The gate information indicates a state of a gate signal for a transistor coupled to the second portion of the isolated gate driver. A demodulator circuit demodulates a signal containing the gate information and the drive strength information transmitted across the isolation communication channel in the serial word. A gate signal output circuit coupled to the demodulator circuit supplies the gate signal based on the gate information with a drive strength of the gate signal being based on the drive strength information.

Abstract: A bi-directional switch for an inductive machine is described. The bi-directional switch may include a first power semiconductor transistor with a first source, a first drain, and a first gate. The bi-directional switch may further include a second power semiconductor transistor with a second source, a second drain, and a second gate. The bi-directional switch may include the second source connected to the first source. The bi-directional switch may include a soft-starter device including a control circuit configurable to provide a first control signal to the first power semiconductor transistor and a second control signal to the second power semiconductor transistor.

Abstract: A board main body part has a multilayer structure with even-numbered layers including a first layer formed on a surface part on one side and a second layer formed on a surface part on the other side. On both of the first layer and the second layer, a low voltage region in which a low voltage circuit is disposed, a high voltage region in which high voltage circuits are disposed, and an insulating region in which the low voltage region is electrically isolated from the high voltage region are formed. At least a part of a first high voltage circuit is disposed in a first-layer high voltage region formed on the first layer, and at least a part of a second high voltage circuit is disposed in a second-layer high voltage region formed on the second layer.

Abstract: The present disclosure relates to a high-side transistor drive circuit, a switching circuit and a controller of a DC/DC converter. A pulse generator generates a first pulse that becomes high level for a certain period of time in response to a first edge of an input signal and a second pulse that becomes high level for a certain period of time in response to a second edge of the input signal. An open drain circuit has a first output node that becomes low level in response to the first pulse and a second output node that becomes low level in response to the second pulse. A first current mirror circuit folds back a first current flowing through the first output node of the open drain circuit. A second current mirror circuit folds back a second current flowing through the second output node of the open drain circuit.

Abstract: Circuits and methods that more effectively and efficiently solving the charge-balance problem for multi-level converter circuits by establishing a control method that selects an essentially optimal pattern or set of switch states that moves the fly capacitors towards a charge-balance state or maintains the current charge state every time a voltage level at an output node is selected regardless of what switch state or states were used in the past. Accordingly, multi-level converter circuit embodiments of the invention are free to select a different switch state or output voltage level every switching cycle without needing to keep track of any prior switch state or sequence of switch states. Additional benefits include improved transient performance made possible by the novel charge-balance method.

Abstract: A power conversion device includes a controller configured to alternately turn on a second upper arm and a second lower arm of a first bridge circuit such that on-times thereof do not overlap each other to increase power stored in a resonance capacitor of the first bridge circuit in a state in which a first leg of the first bridge circuit is turned off when transmitting power from a second bridge circuit to the first bridge circuit and performing step-up operation.

Abstract: The present disclosure provides an isolated multi-phase DC/DC converter with a reduced quantity of blocking capacitors. In one aspect, the converter includes a multi-phase transformer having a primary circuit and a secondary circuit magnetically coupled to the primary circuit, the primary circuit having a first quantity of terminals, and the secondary circuit having a second quantity of terminals; a third quantity of blocking capacitors, each being electrically connected in series to a respective one of the terminals of the primary circuit; and a fourth quantity of blocking capacitors, each being electrically connected in series to a respective one of the terminals of the secondary circuit. The third quantity is one less than the first quantity. The fourth quantity is one less than the second quantity.

Abstract: Disclosed herein are systems and methods for operation of a switched capacitor converter (SCC). In some variations, the SCC includes a resonant circuit including an inductor. Aspects of the disclosure include methods for controlling the SCC switches to decrease switching losses associated with operating the converter and to increase efficiency of the SCC. According to some aspects, a control method is used to switch converter switches under zero-voltage conditions. According to some aspects, a control method is used to switch converter switches under zero-current conditions.

Abstract: A pyramid-type multilevel converter for converting DC voltage to AC voltage waveforms, and vice versa. An example device can use modular building blocks to form a selector stage, a converter stage, and at least one intermediate stage if the number of converters within the converter stage is greater than or equal to 3, with the converter stage switching at high-frequency PWM to chop the DC voltages. The modular building blocks are connected in a symmetric or asymmetric pyramid configuration having a base of using the converter stage and an apex of the selector stage.

Abstract: A method of regulating an output voltage of a switched mode power supply having a variable input voltage and at least one power switch is provided. The method includes generating a control signal for the at least one power switch of the switched mode power supply based at least in part on a control voltage, the control signal having a duty cycle. The method also includes generating a reference voltage based at least in part on the duty cycle of the control signal and a maximum duty cycle, and generating the control voltage based at least in part on the reference voltage and the output voltage.

Abstract: A power converter includes a primary side circuit, a secondary side circuit, a transformer, and a controller. A primary side of the transformer is connected to the primary side circuit, and a secondary side of the transformer is connected to the secondary side circuit. The primary side circuit includes a resonant circuit. The secondary side circuit is configured to supply electric energy to the transformer. The transformer is configured to supply the electric energy to the primary side circuit. The primary side circuit is configured to convert the electric energy. The controller is connected to the secondary side circuit, and is configured to control, in a control cycle, the secondary side circuit to supply the electric energy to the transformer. Duration of the control cycle is greater than or equal to duration of a resonance cycle of the resonant circuit.

Abstract: According to some embodiments, a power converter is disclosed. The power converter includes an input electromagnetic interference filter to receive raw AC power and to output filtered AC power. A type-pi filter, and switch, receives the filtered AC power, further filters the received filtered AC power, and receives an indication from a digital controller module that an amplitude, frequency, and phase information of the filtered AC voltage is within a range of acceptable values and outputs the further filtered AC Power. The power conversion circuit receives a signal from the digital controller, receives the further filtered AC power from the type-pi filter and switch, converts the further filtered AC power to a desired voltage and outputs converted AC power. An output electromagnetic interference filter receives the converted AC power from the output electromagnetic interference filter and outputs the filtered converted AC power.

Abstract: A power supplying circuit includes a first high-voltage switch, a first low-voltage switch, a second high-voltage switch, a second low-voltage switch, and a controller circuit. The first high-voltage switch receives a first input voltage and generates a first node voltage. The first low-voltage switch is coupled between the first high-voltage switch and an output terminal. The second high-voltage switch receives a second input voltage and generates a second node voltage. The second low-voltage switch is coupled between the second high-voltage switch and the output terminal. The controller circuit controls the first high-voltage switch, the first low-voltage switch, the second high-voltage switch, and the second low-voltage switch according to the first node voltage and the second node voltage such that an output voltage is outputted to the output terminal.

Abstract: The present invention relates to an AC-DC power converter which includes a resonant DC-DC converter and a charge pump circuit. The charge pump circuit is configured to perform power factor correction of the AC-DC power converter by drawing current pulses at a switching frequency of the converter from an AC line voltage such that electrical charges of the current pulses vary substantially proportionally with instantaneous amplitude of the AC line voltage.

Abstract: An efficient control method for an isolated multilevel DC/DC resonant converter achieves a wide output voltage range with a narrow device switching frequency range, relative to the output voltage range and the device switching frequency range of the prior art. At any given time, a control circuit selects one of three different modulation schemes to operate the primary-side switching devices of the resonant converter based on at least one of output voltage, output current, input signal, and one or more external control signals. Together with a selected device switching frequency, the three modulation schemes generate different voltage waveforms to a primary-side transformer, which are coupled to the secondary-side to provide different output voltages.

Abstract: Related to is a bidirectional CLLC circuit with a coupled inductor, which is associated with a circuit topology and operation control of a bidirectional CLLC resonant converter. Provided is a structure of a bidirectional CLLC resonant circuit with a coupled inductor, including a primary side bridge, a secondary side bridge, a primary side resonant capacitor, a secondary side resonant capacitor, a coupled resonant inductor, and a transformer. Compared with a structure of a conventional bidirectional CLLC resonant circuit, two separate resonant inductors located at a primary side and a secondary side in an original resonant cavity are replaced with one coupled resonant inductor in the circuit; the coupled resonant inductor has opposite dotted terminals with the transformer, and a primary side and a secondary side of the coupled resonant inductor are respectively in serial connection with a primary side and a secondary side of the transformer.

Abstract: Disclosed is a three-phase interleaved resonant converter, which includes a three-phase inversion circuit connected to an input voltage and including a first output node, a second output node, and a third output node, a three-phase transformer including three transformers, a three-phase resonant circuit including three resonant capacitors and three resonant inductors, and a three-phase rectifier filter circuit. One ends of the three resonant inductors are respectively connected to the first output node, the second output node and the third output node, and the other ends of the three resonant inductors are respectively connected to a triangular configuration formed by an alternate connection of the three resonant capacitors with primary windings of the three transformers.