An electronic device includes: a first DC/DC converter including switches, a first capacitor, and a first inductor; and control circuit configured to control on/off states of the switches. In an on state, the switches include: a first switch configured to connect one end of the first capacitor to the input power source; a second switch configured to connect the one end of the first capacitor to one end of the first inductor; a third switch configured to connect another end of the first capacitor to the one end of the first inductor; and a fourth switch configured to connect the other end of the first capacitor to an output terminal of the first DC/DC converter. The first inductor includes the one end connected to the other end of the second switch and the one end of the third switch, and another end connected to a ground.

An apparatus includes a controller. The controller monitors a magnitude of voltage powering a first dynamic load disposed in a series circuit path of multiple dynamic loads. The controller compares the magnitude of the voltage to a reference voltage. Based on the comparing, the controller controls operation of multiple power converter phases in a power converter to maintain a magnitude of the voltage powering the first dynamic load.

A power electronics system, comprising a first inverter configured to receive DC power from a power source and a second inverter configured to receive DC power from the power source is provided. The system includes a first output inductor connected in series to an output of the first inverter, a second output inductor connected in series to an output of the second inverter, a coupling inductor configured to receive current from the first output inductor and the second output inductor, and an AC power output.

An example power system for supplying AC output power to an AC load includes: a variable-speed generator configured to be driven by a prime mover, the generator comprising a first winding and a reference tap in the first winding; a rectifier configured to rectify an input voltage from the first winding to output a positive DC signal with respect to the reference tap and a negative DC signal with respect to the reference tap; a first boost converter configured to convert the positive DC signal to generate a positive DC bus voltage with respect to the reference tap; a second boost converter configured to convert the negative DC signal to generate a negative DC bus voltage with respect to the reference tap; and an inverter circuit configured to convert the positive DC bus voltage and the negative DC bus voltage to an AC output signal with respect to the reference tap.

In an embodiment, a power module may include: a plurality of first stages, each having an H-bridge to receive an incoming AC voltage at a first frequency and rectify the incoming AC voltage to a DC voltage; a plurality of DC buses, each to receive the DC voltage from one of the plurality of first stages; a plurality of second stages, each coupled to one of the plurality of DC buses to receive the DC voltage and output a second AC voltage at a second frequency; and a hardware configuration system having fixed components and optional components to provide different configurations for the power module.

Embodiments of the present disclosure provide an insulation monitoring device applied to a power system and a power system. The power system includes at least one power electronic converter module. The insulation monitoring device includes an insulation component, a signal source, an impedance module, and a monitoring module. The insulation component at least partially wraps around the power electronic converter module. The signal source is electrically coupled to a circuit node in the power electronic converter module, the impedance module is connected between the signal source and the insulation component, and the monitoring module is configured to monitor an insulation resistance value of the insulation component, so that an insulation state of the power electronic converter module may be determined.

In one embodiment, an EV charging system includes: a plurality of first converters to receive and convert grid power at a distribution grid voltage to at least one second voltage; a high frequency transformer coupled to the first converters to receive the at least one second voltage and output at least one high frequency AC voltage; and a plurality of port rectifiers coupled to a plurality of secondary windings of the high frequency transformer, each of the port rectifiers comprising a unidirectional AC-DC converter to receive and convert the at least one high frequency AC voltage to a DC voltage. At least some of the port rectifiers may be coupled in series to provide at least one of a charging current or a charging voltage to at least one dispenser to which at least one EV is to couple.

A modular DC-DC converter and a battery charging device are provided. The modular DC-DC converter includes a first converter provided at an input side, a plurality of second converters provided at an output side, and a plurality of high-frequency transformers provided between the first converter and the second converters. The first converter and the high-frequency transformers are connected in series at the input side, and the second converters are connected in parallel at the output side.

Different systems to achieve solar power conversion are provided in at least three different general aspects, with circuitry that can be used to harvest maximum power from a solar source (1) or strings of panels (11) for DC or AC use, perhaps for transfer to a power grid (10) three aspects can exist perhaps independently and relate to: 1) electrical power conversion in a multimodal manner, 2) alternating between differing processes such as by an alternative mode photovoltaic power converter functionality control (27), and 3) systems that can achieve efficiencies in conversion that are extraordinarily high compared to traditional through substantially power isomorphic photovoltaic DC-DC power conversion capability that can achieve 99.2% efficiency or even only wire transmission losses. Switchmode impedance conversion circuits may have pairs of photovoltaic power series switch elements (24) and pairs of photovoltaic power shunt switch elements (25).

Systems and methods of this disclosure use low voltage energy storage devices to supply power at a medium voltage from an uninterruptible power supply (UPS) to a data center load. The UPS includes a low voltage energy storage device (ultracapacitor/battery), a high frequency (HF) bidirectional DC-DC converter, and a multi-level (ML) inverter. The HF DC-DC converter uses a plurality of HF planar transformers, multiple H-bridge circuits, and gate drivers for driving IGBT devices to generate a medium DC voltage from the ultracapacitor/battery energy storage. The gate drivers are controlled by a zero voltage switching (ZVS) controller, which introduces a phase shift between the voltage on the primary and secondary sides of the transformers. When the primary side leads the secondary side, the ultracapacitor/battery discharges and causes the UPS to supply power to the data center, and when the secondary side leads the primary side, power flows from the grid back to the UPS, thereby recharging the ultracapacitor/battery.