Discussed is a photovoltaic module that includes a solar cell module including a plurality of solar cells; a converter to convert a level of a DC power input from the solar cell module; an inverter to convert the DC power into an AC power; and a controller to control the inverter, in which the controller performs asynchronous pulse width modulation control for the inverter, and controls a switching frequency of at least some switching elements in the inverter to be changed for a period including a maximum point or a minimum point of the AC power output from the inverter.

A power control method for wireless charging and an electronic device therefor are provided. The electronic device, includes a coil, an inverter including gate inputs which are electrically connected to the coil, and at least one processor. The at least one processor is configured to control the gate inputs of the inverter in an anti symmetric manner to generate an output power, receive an output power reduction request from an external electronic device, based on receiving the output power reduction request, determine whether a ratio of ON-operations to OFF-operation of the gate inputs of the inverter is less than or equal to a designated ratio, and based on the ratio of ON-operations to OFF-operations of the gate inputs of the inverter being less than or equal to the designated ratio, modulate a phase of a voltage input into the gate inputs of the inverter to generate an output power.

A full-bridge inverter is configured with a parallel connection of a first leg and a second leg, and controlled in a dual-leg resonant mode in which a positive-side switching element of the first leg and a negative-side switching element of the second leg are turned on/off at the same time and a negative-side switching element of the first leg and a positive-side switching element of the second leg are turned on/off at the same time, and controlled in a single-leg resonant mode in which the positive-side switching element of the first leg and the negative-side switching element of the second leg, and the negative-side switching element of the first leg and the positive-side switching element of the second leg are turned on/off shiftedly in time by a phase shift amount.

A method for operating a transformerless inverter includes operating first and second half-bridges of the inverter using a unipolar clocking method as a first clocking method, determining a value of a grid-frequency stray current at the DC terminals of the inverter during the unipolar clocking method, and when a limit value is exceeded by the stray current value, operating the first and second half-bridges of the inverter using a stray-current-reducing clocking method as a second clocking method in which the first half-bridge provides an AC voltage at the first AC output, wherein an amplitude of the AC voltage is less than 50% of the amplitude of a voltage amplitude of the grid, and the second half-bridge provides a difference voltage between the grid voltage and the voltage provided by the first half-bridge at the first AC output.

A method for controlling a PSFB converter, an apparatus, and a storage medium are disclosed, and relate to the field of power supply technologies. The method includes: controlling, by a control circuit after controlling a first clock and a second clock to operate in a first state for a time period, the first clock and the second clock to switch to a second state, where when the first clock and the second clock operate in the first state, the first bridge arm is a leading bridge arm, and the second bridge arm is a lagging bridge arm, and when the first clock and the second clock operate in the second state, the first bridge arm is a lagging bridge arm, and the second bridge arm is a leading bridge arm.

A non-contact electric power transmitting device includes an electronic control unit configured to perform; i) a first control that controls a transmitted electric power to a target electric power by adjusting a duty cycle of an output voltage of an inverter, ii) a second control that controls a turn-on current representing an output current of the inverter by adjusting a drive frequency, the output current being an output current at a time when the output voltage rises, and iii) adjusting the duty and the drive frequency such that a current supplied from the inverter to an electric power transmitting unit decreases within the range in which the turn-on current is smaller than or equal to a limit value, while performing the first control.

Provided are a control method and a control device for an inverter being capable of soft start using soft switching without causing a voltage surge or a current surge. A control method for soft start using soft switching of an inverter, the inverter being a bridge circuit with at least two upper and lower arms, the control method including: shifting phases of gate pulses for a switching element of the upper arm and a switching element of the lower arm, which are paired for current energization, from each other to form an overlap period of both the gate pulses; and changing magnitude of the shift to gradually increase the overlap period that defines an energization period to implement the soft start using the soft switching.

In power control and frequency control carried out for a prescribed first period, when magnitude of output power does not converge in power control and a frequency of output power does not converge in frequency control, a power supply ECU stops frequency control and carries out only power control for a prescribed second period. When magnitude of output power has converged after lapse of the second period, the power supply ECU determines that a condition for frequency control is inappropriate. When magnitude of output power does not converge after lapse of the second period, the power supply ECU determines that a condition for power control is inappropriate.

A circuit arrangement (10) for controlling a stator winding (11) of a stator (12) of an electric machine (13) is provided. The stator winding (11) has at least four electrical phases (), which are designed to be supplied with a separate phase current (I.sub.n), respectively. A modulation signal (M) is assigned to each electrical phase () and the modulation signals (M) are out of phase with respect to one another so that the stator winding (11) is designed to generate a rotary field. At least two carrier signals (T) are provided for generating the phase currents (I.sub.n), and the electrical phases () are divided into at least two groups, each of which is assigned a carrier signal (T). The carrier signals (T) have a phase shift () relative to one another. Furthermore, an electric machine (13) comprising a circuit arrangement (10) is provided.

A full-bridge inverter is configured with a parallel connection of a first leg and a second leg, and controlled in a dual-leg resonant mode in which a positive-side switching element of the first leg and a negative-side switching element of the second leg are turned on/off at the same time and a negative-side switching element of the first leg and a positive-side switching element of the second leg are turned on/off at the same time, and controlled in a single-leg resonant mode in which the positive-side switching element of the first leg and the negative-side switching element of the second leg, and the negative-side switching element of the first leg and the positive-side switching element of the second leg are turned on/off shiftedly in time by a phase shift amount.