A voltage converter includes a capacitive voltage conversion circuit, an output capacitor, an inductor, a current detector, and a controller. The capacitive voltage conversion circuit includes switches, at least one flying capacitor, and an intermediate capacitor at an output portion. The current detector detects a current flowing in the inductor. The controller controls the switches in the capacitive voltage conversion circuit to change between at least two states by comparing the current flowing in the inductor to a threshold current.

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. The three-phase rectifier filter circuit is connected with secondary windings of the three transformers to rectify and filter secondary currents output by the secondary windings of the three transformers respectively, and generate an output voltage accordingly.

Example embodiments of systems, devices, and methods are provided herein for energy systems having multiple modules arranged in cascaded fashion for storing power from one or more photovoltaic sources. Each module includes an energy source and converter circuitry that selectively couples the energy source to other modules in the system over an AC interface for generating AC power or for receiving and storing power from a charge source. Each module also includes a DC interface for receiving power from one or more photovoltaic sources. Each module can be controlled by control system to route power from the photovoltaic source to that modules energy source or to the AC interface. The energy systems can be arranged in single phase or multiphase topologies with multiple serial or interconnected arrays. The energy systems can be arranged such that each module receives power from the same single photovoltaic source, or multiple photovoltaic sources.

A control circuit and control method for an interleaved switching converter having a first and second interleaved voltage regulating circuit. The control method is: controlling a first switch of the first voltage regulating circuit operating in quasi-resonant mode, turning ON a second switch of the second voltage regulating circuit after the first switch is turned ON for a half switching period, generating a current sensing signal by detecting a current flowing through the second switch, generating a peak signal, wherein the peak signal is adjusted when a voltage across the second switch is higher than a voltage reference at the time the second switch is turned ON, and turning OFF the second switch when the current sensing signal increases to the peak signal.

According to at least one aspect of the disclosure, a bi-directional AC/DC converter is provided comprising a DC-power connection configured to be coupled to a DC-power source, an AC-power connection configured to be coupled to at least one of an AC-power source or a load, a multiplexer having a plurality of multiplexer switches, at least one interleaved bridge circuit having a plurality of bridge switches coupled to the multiplexer, and a positive DC node and a negative DC node coupled to the plurality of multiplexer switches, wherein the plurality of bridge switches includes at least two bridge switches coupled between the AC-power connection and at least one of the positive DC node or the negative DC node.

In some embodiments, a charge pump system can include a charge pump having a plurality of units driven by respective clock signals having different phases. The plurality of units can provide respective output voltages combined into an output voltage of the charge pump. The charge pump system can further include a feedback circuit configured to compare a scaled value of the output voltage with a reference voltage to generate a comparator output voltage. The charge pump system can further include a level shifter circuit configured to shift the comparator output voltage to a level of the output voltage of the charge pump.

A power converter includes a controller for driving a power switch in one phase of a plurality of phases of the power converter. The controller may have a first terminal for receiving an input switch driving signal which is used to drive a power switch in another phase of the power converter, and a second terminal for providing an output switch driving signal to drive the power switch in the one phase. The controller draws power from the input switch driving signal received at the first terminal, and is configured to provide the output switch driving signal based on the input switch driving signal.

A power conversion apparatus includes a switching circuit including multiple switching elements, and a control unit configured to control and switch the multiple switching elements included in the switching circuit at a predetermined switching frequency with a direct current voltage applied to an input terminal of the switching circuit. The switching circuit is configured to convert the direct current voltage applied to the input terminal and to output a converted electric current. The switching frequency is set such that the switching frequency and a main frequency component of a ripple occurring in the electric current are out of a frequency range used for communication with a vehicle-mounted receiver.

A polyphase power-supply device includes first to N-th DC-DC converters connected in parallel to each other between an input terminal and an output terminal and a switching controller configured to perform interleave control on the first to N-th DC-DC converters by supplying first to N-th pulse width modulation (PWM) signals to the first to N-th DC-DC converters, respectively, where N is any integer equal to or greater than two. A switching frequency of the first PWM signal is changed at a change time point at which a cycle of the first PWM signal starts. A length of a cycle of the k-th PWM signal firstly appearing after the change time point is shorter than lengths of subsequent cycles of the k-th PWM signal appearing the first cycle of the k-th PWM signal. This polyphase power-supply device has high reliability.

A power converter includes a primary winding and multiple output windings to provide multiple independently controlled and regulated outputs with a common return line. The outputs are coupled to independently regulate constant current, constant voltage, or both constant current and constant voltage outputs. A secondary control block is coupled to control a synchronous rectifier switch coupled to the common return line to synchronize switching with a primary side power switch to provide complementary conduction of the primary winding and the multiple output windings. A plurality of controlled power pulse switches is coupled to the multiple output windings. A request of a power pulse from each of the outputs is transferred through the secondary control block to a primary switch control block to turn on the primary side power switch to transfer a power pulse to the multiple output windings and through controlled power pulse switches to the outputs.