A method and apparatus for power converter current control. In one embodiment, the method comprises controlling an instantaneous current generated by a power converter such that that power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance.

A method and apparatus for power converter current control. In one embodiment, the method comprises controlling an instantaneous current generated by a power converter such that that power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance.

A method for handling errors in an inverter device for converting DC current from DC current generators into AC current, the inverter device comprising a plurality of parallel DC current branches, each DC current branch comprising an inverter and a DC current input for connection to one of the DC current generators. As a result of an error detected in one of the inverters by the inverter device, the DC current input of the faulty inverter is connected to the DC current input of an error-free inverter.

A method for handling errors in an inverter device for converting DC current from DC current generators into AC current, the inverter device comprising a plurality of parallel DC current branches, each DC current branch comprising an inverter and a DC current input for connection to one of the DC current generators. As a result of an error detected in one of the inverters by the inverter device, the DC current input of the faulty inverter is connected to the DC current input of an error-free inverter.

A method and apparatus for power converter current control. In one embodiment, the method comprises controlling an instantaneous current generated by a power converter such that that power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance, wherein real and reactive phasor currents for the power converter are indirectly controlled by modifying amplitude and phase of a virtual AC voltage waveform that defines the virtual AC voltage source.

A method and apparatus for power converter current control. In one embodiment, the method comprises controlling an instantaneous current generated by a power converter such that that power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance, wherein real and reactive phasor currents for the power converter are indirectly controlled by modifying amplitude and phase of a virtual AC voltage waveform that defines the virtual AC voltage source.

Aspects of the present disclosure are generally directed to a power supply for generating an output supply voltage. The power supply generally includes a variable voltage supply configured to generate an intermediate supply voltage based on a reference signal, a correction circuit configured to generate an error signal based on the output supply voltage or the intermediate supply voltage, and a combiner configured to combine the intermediate supply voltage and the error signal to provide the output supply voltage.

A frequency converter (100, 200, 300, 500, 600) comprising a first mixer (105) arranged to receive a first and a second input signal and to have as its output the sum and the difference of the first and second input signals. The frequency converter (100, 200, 300, 500, 600) also comprises generating means (120) for generating the second input signal and for receiving the output signal of the first mixer (105) and multiplying it by a signal at a frequency which is two times the frequency of the second input signal, thereby generating a product. The frequency converter (100, 200, 300, 500, 600) also comprises adding means (110) for obtaining the sum of this product and the output signal from the first mixer.

A frequency converter (100, 200, 300, 500, 600) comprising a first mixer (105) arranged to receive a first and a second input signal and to have as its output the sum and the difference of the first and second input signals. The frequency converter (100, 200, 300, 500, 600) also comprises generating means (120) for generating the second input signal and for receiving the output signal of the first mixer (105) and multiplying it by a signal at a frequency which is two times the frequency of the second input signal, thereby generating a product. The frequency converter (100, 200, 300, 500, 600) also comprises adding means (110) for obtaining the sum of this product and the output signal from the first mixer.

There is provided a power supply device, including a connection state determiner that determines a connection state between an external power recipient device and a power line on which electric power is transmitted, a communication control unit that, in a case where the connection state determiner determines that the external power recipient device is connected to the power line, causes information related to power receiving capability corresponding to the external power recipient device to be acquired by wireless communication, a power receiving capability specifier that specifies the power receiving capability of the external power recipient device on the basis of the acquired information related to the power receiving capability, and a power control unit that causes electric power compatible with the external power recipient device to be transmitted on the basis of the specified power receiving capability.