Abstract: A converter is configured for connecting between a solar cell and an inverter configured to convert direct-current power output from the solar cell into alternating current power, and the converter is configured to increase the potential-to-ground at the negative terminal of the solar cell to greater than the potential-to-ground at the negative terminal of the inverter when outputting the direct-current power generated by the solar cell to the inverter side.

Abstract: An inverter system is provided that includes switches that alternate between closed and open states to conduct or block conduction, respectively, of electric current through the switches and switch controllers that control operation of the switches between the closed and open states. In a first operating mode, the controllers control operation of the switches to convert direct current into a single, common phase of an alternating current from a same phase output from each of the switches to power a higher-demand load of a powered system with the single phase of the alternating current. In a second operating mode, the controllers control operation of the switches to convert the direct current into multiple, different phases of the alternating current to power a lower-demand load of the powered system with the multiple, different phases of the alternating current. Each of the switches outputs a different phase of the multiple phases.

Abstract: A power conversion device in one embodiment includes power conversion circuitry having a plurality of converter cells connected in series to each other. Each converter cell includes an energy storage device and is configured to be capable of discharging stored energy. A control device is configured to generate a control command for controlling operation of each converter cell. A protection device is configured to generate a protection command for instructing whether to cause each converter cell to operate based on the control command or to stop operation of each converter cell regardless of the control command. A repeating device is configured to generate a control-and-protection command that is a combination of control information based on the control command and protection information based on the protection command, and output the generated control-and-protection command to each converter cell.

Abstract: A power conversion system includes a first and a second energy storage element, a first boost circuit, a switching element, a control circuit and a detection circuit. The first boost circuit is coupled between the first and the second energy storage element. The switching element is coupled to the first boost circuit in parallel. When the first voltage value is lower than a first preset level, the control circuit turns off the switching element and drives the first booster circuit to maintain a second voltage value according to the first voltage value, so that the power conversion system operates in a first state. When the first voltage value is equal to or larger than the first preset level, the control circuit turns on the switching element and turns off the first boost circuit, so that the power conversion system operates in a second state.

Abstract: A control circuit performs at least pulse width modulation control on a first leg and selects to perform pulse width modulation control and pulse frequency modulation control, to perform pulse width modulation control and phase shift modulation control, or to perform pulse width modulation control, pulse frequency modulation control, and phase shift modulation control on a second leg, based on comparison of a voltage conversion ratio between DC voltage of a DC capacitor and output voltage to a load with at least one threshold.

Abstract: A voltage regulator has a switching circuit and a control circuit. The switching circuit receives an input voltage and provides an output voltage and an output current. The control circuit provides a control signal to the switching circuit, such that the output voltage is maintained at a clamp voltage level when the output current is lower than a transition current level, and the output voltage decreases as the output current increases when the output current is higher than the transition current level.

Abstract: A totem-pole bridgeless power factor corrector and a power factor correction method are provided. The totem-pole bridgeless power factor corrector obtains a duty cycle of next state by a predictive valley-peak current control method, and uses an OR gate element to combine PWM signals generated by an average current control method and the predictive valley-peak current control method, thereby enabling a digital signal processor to update the duty cycle.

Abstract: Described is a controller for an AC to DC or a DC to AC multi-phase power converter of a type having N power converter phases, where N is greater or equal to 2. The controller comprises a control module configured to change or vary a phase shift angle of the input current or output current for each of the N power converter phases such that an average phase shift value for each of said N power converter phases over a control module AC line cycle is about, near or substantially the same value. In an embodiment of an AC/DC or a DC/AC multi-phase power converter of a type having N power converter phases arranged in parallel, an advantage of arranging the average phase shift value for each power converter phase to be substantially equal or about equal over an AC line cycle is that it reduces or eliminates any imbalances in the input currents or output currents of the N power converter phases.

Abstract: A full bridge converter having a wide output voltage range includes an input power source, a full bridge switching circuit, a transformer, a first rectifying circuit, a second rectifying circuit, a first output circuit, a second output circuit, and a control circuit. The transformer includes a magnetic core, a primary side winding, a first secondary side winding, and a second secondary side winding. The first rectifying circuit includes a first AC switch, a second AC switch and a first freewheeling diode, and the second rectifying circuit includes a third AC switch, a fourth AC switch and a second freewheeling diode. The control circuit, according to a duty cycle, controls the first AC switch and the third AC switch to be turned on during a positive half cycle, and controls the second AC switch and the fourth AC switch to be turned on during a negative half cycle.

Abstract: A DC-DC converter can include: a switched capacitor converter including at least one switch group and at least one capacitor, where each switch group includes two switches coupled in series, and at least one capacitor is respectively coupled in parallel with a corresponding one of the switch groups; and a switch converter including a first magnetic component, where the switch converter is configured to share one of the switch groups, the first magnetic component is coupled to an intermediate node of the shared switch group, and the intermediate node is a common coupling point of two switches of the shared switch group.

Abstract: A power converter having a Scott-T transformer includes a direct current to alternating current converter configured to have at least two multilevel converters converting input direct current power to alternating current power, a Scott-T transformer configured to operate in medium frequency of several hundreds of Hz to several tens of kHz, to transform a voltage level of the alternating current power from each of the at least two multilevel converters of the direct current to alternating current converter into three-phase alternating current power, and to output the three-phase alternating current power, and an alternating current to direct current converter configured to convert the three-phase alternating current power from the Scott-T transformer to direct current power.

Abstract: Flyback converters and corresponding methods are provided. In an implementation, an on-time of a low-side switch of the flyback converter is kept at half a resonance period of a resonance defined by a leakage inductance of a transformer of the flyback converter and a capacitance value of a capacitor coupled to a primary winding of the transformer. Other methods, controllers and flyback converters are also provided.

Abstract: An object of the present invention is to improve the reliability of a power converter against electromagnetic noise.

Abstract: A single-stage transmitter for wireless power transfer is provided. The transmitter includes a rectifier stage and an inverter stage sharing a first phase leg. The rectifier stage further includes a rectifying leg including two diodes connected in series, and a boost inductor coupling the first phase leg and the rectifying leg to an input port. The inverter stage further includes a second phase leg. Each phase leg includes two switches connected in series. The first and second phase legs are coupled to an output port. A bus capacitor is coupled across the first phase, second phase, and rectifying legs. A controller is programmed to determine first and second parameters, based on an output power at the output port, to simultaneously control the rectifier stage and the inverter stage to maintain constant bus voltage and achieve high power factor and low total harmonic distortion at the input port.

Abstract: A method for controlling multiple switching devices (15a-d, 75a-b) of a multilevel converter (1, 70) includes providing a plurality of carrier signals (C1-C6) and a reference signal (34, 80), the reference signal (34, 80) having a waveform range divided in a plurality of contiguous bands (B1-B6), dynamically allocating the plurality of carrier signals (C1-C6) to the multiple switching devices (15a-d, 75a-b), and generating pulse width modulation signals (18, 77) to generate switching events of the multiple switching devices (15a-d, 75a-b) based on a comparison of dynamically allocated carrier signals (C1-C6) with the reference signal (34, 80), wherein the plurality of carrier signals (C1-C6) have a phase shift between the carrier signals (C1-C6), and wherein the plurality of carrier signals (C1-C6) are dynamically allocated to the multiple switching devices (15a-d, 75a-b) such that for each switching device (15a-d, 75a-b) the plurality of carrier signals (C1-C6) are rotated and selected based on a position of

Abstract: A power conversion circuit includes: a MOSFET having a super junction structure; an inductive load; and a freewheel diode. A switching frequency of the MOSFET is 10 kHz or more. When the MOSFET is turned off, a first period during which a drain current decreases, a second period during which the drain current increases, and a third period during which the drain current decreases again appear in this order. The freewheel diode is an Si-FRD or an SiC-SBD, and current density obtained by dividing a current value of the forward current by an area of an active region of the freewheel diode falls within a range of 200 A/cm2 to 400 A/cm2 when the freewheel diode is the Si-FRD, and the current density falls within a range of 400 A/cm2 to 1500 A/cm2 when the freewheel diode is the SiC-SBD.

Abstract: A resonant power converter and a current synthesizing method therefor are provided. The resonant power converter includes a switch circuit, a resonant tank, a transformer, a rectifier circuit, and a current synthesizing module. The switch circuit receives an input voltage from an input source, and the rectifier circuit outputs an output voltage to a load. The current synthesizing module includes a sensing circuit, a peak hold circuit, and a calculation unit. The sensing circuit is configured to sense a resonant capacitor voltage on a resonant capacitor of the resonant tank. The peak hold circuit is configured to receive the resonant capacitor voltage and acquires a peak value thereof. The calculation unit is configured to receive the peak value, a switching frequency, the input voltage, the output voltage, and a resonant capacitance of the resonant power converter and generate a synthesized output current accordingly.

Abstract: When at least one of a value a detected output current to a magnet and a magnet load defined by the following formula is equal to or larger than a threshold value predetermined for the value of the detected output current or a threshold value predetermined for the magnet load, a controller constituting a control device outputs, to a control circuit, a command to decrease voltage applied to the magnet from next attracting operation. Magnet load=excitation ratio×I×V . . . ; wherein excitation ratio: excitation time/(excitation time+non-excitation time); I: value of the output current; V: voltage applied to a lifting magnet.

Abstract: Provided is a power distribution system that includes a reconfigurable DC/DC power converter configured to be connected with an energy storage device at an input end for receiving an input voltage therefrom, and a power electronics building block having a primary bridge unit, a secondary bridge unit magnetically connected with the primary bridge unit, and an outer bridge unit at an output end and connected to an output of the secondary bridge unit, configured to output an output voltage.

Abstract: Disclosed is a primary-clocked switching power supply for converting an input voltage into an output voltage, comprising: a primary side circuit branch, where the input voltage can be applied; isolated from the primary side circuit branch, a secondary side circuit branch, where the output voltage is tappable; between the primary side and the secondary side circuit branch, a galvanic isolation; a fuse or circuit breaker arranged in the primary side circuit branch; a first switchable switch element arranged in the primary side circuit branch such that switching trips the primary side fuse or circuit breaker; and a monitoring unit connected with the first switch element and arranged in the primary side circuit branch and adapted to monitor a characteristic electrical signal determined by the second primary winding and, when the characteristic electrical signal exceeds a threshold value, to switch the first switch element.