A matrix converter system having a current control mode operation is provided. The system includes a matrix converter having a switching matrix. The matrix converter is coupled at its low-voltage side to a generator and at its output load side to a load. A controller having a pulse width modulation (PWM) control circuit is configured to control the matrix converter via its switching matrix to increase energy within the internal inductances of the generator when the switching matrix causes a short circuit. A feed forward calculator is configured to calculate a feed forward output phase angle. The feed forward output phase angle is an estimation of an angle between an output current vector and an output voltage vector that represent feedback signals of current and voltage output by the matrix converter. The angular position of the voltage output vector is adjusted as a function of the feed forward output phase angle to align angular position or phase angle of the voltage output vector that represents the voltage output with a selected angular position or phase angle.

Controlling power delivered to a heating device occurs using a phase control, wherein the phase control includes changing a cut-off phase of an alternating current electrical signal delivered to the heating device. The power delivered to the heating device is increased from zero to an operational level using the phase control. The level of the power delivered to the heating device is maintained at the operational level using both the phase control and an integral half cycle control. The integral half cycle includes selectively removing a plurality of half cycles from the alternating current electrical signal delivered to the heating device.

An electro-mechanical kinetic energy storage device includes an input port, an output port, and a tertiary port separate from and magnetically coupled to the input port and the output port. The input port is configured to receive a first input electrical energy from a first electrical source for inducing mechanical energy into the electro-mechanical kinetic energy storage device. The output port is configured output a first converted electrical energy to a first load in which the outputted electrical energy is generated from the induced mechanical energy. The tertiary port is configured to receive a second input electrical energy from a second electrical source for inducing the mechanical energy, and output a second converted electrical energy to a second load, the second converted electrical energy generated from the induced mechanical energy.

An electrical power distribution network is disclosed, the network can include: a plurality of electrical power control apparatuses, each of the electrical power control apparatuses including: one or more signal conversion components receiving electrical power in the form of a corresponding first signal having a corresponding first fundamental frequency and a corresponding first characteristic voltage, and generating a corresponding second signal having a corresponding second fundamental frequency and a corresponding second characteristic voltage; and a controller that controls operation of the signal conversion components to determine an output voltage and an output frequency of an output signal of the electrical power control apparatus; electrical power generation components acting as sources of electrical power to at least some of the electrical power control apparatuses; and electrical power consumption components acting as sinks of electrical power from at least some of the electrical power control apparatuses.

A method is configured for operating a converter (10) which is implemented as a modular-multilevel converter and comprises a control arrangement (38) and a number M of phase-legs (21 to 29). The method comprises detecting whether the converter (10) has to be set into one mode of a group comprising a static synchronous compensator mode or a grid unbalance mode, generating mode control signals (MCS) depending on the detected mode, generating balance voltage reference signals (u.sub.bal,ref) depending on a first side frequency (?.sub.g), a second side frequency (?m), second side current reference signals (im,ref) and the mode control signals (MCS), generating a phase-leg control signal (u.sub.ref), generating cell control signals (51 to S4) and providing the cell control signals (51 to S4) to semiconductor switches (41 to 44) of cells (31) of the phase-legs (21 to 29).

A phase converter for electrical signals is configured for obtaining a vector sum of phase signals or subdividing one signal into several phase signals, including transformers and configured for successive addition of signals received from secondary windings of the transformers and inversion of one or several of the signals, or for subdivision of the one signal into the several phase signals.

A phase converter for electrical signals is configured for obtaining a vector sum of phase signals or subdividing one signal into several phase signals, including transformers and configured for successive addition of signals received from secondary windings of the transformers and inversion of one or several of the signals, or for subdivision of the one signal into the several phase signals.

An apparatus includes a first inverter circuit and a second inverter circuit. The first invertor circuit is configured to couple an alternator and a load device to deliver a driving signal from the alternator to the load device. The second invertor circuit is configured to couple the alternator to the load device to deliver a driving signal from the alternator to the load device and configured to couple a battery to the alternator to deliver a charging signal from the alternator the battery

A multiphase power converter and a corresponding method is presented. The multiphase power converter contains a first and a second constituent switched-mode power converter. The first constituent switched-mode power converter provides, both in a first mode of operation and in a second mode of operation, a first phase current to an output of the converter. The second constituent switched-mode power converter provides, in the second mode, a second phase current to the output of the converter. The converter switches, depending on an operation condition of the converter, between the first mode and the second mode. A first transconductance of the first constituent switched-mode power converter is adapted when switching between the first mode and the second mode. By adapting the first transconductance, unsteadiness of the output voltage of the converter occurring during the switching between both modes of operation is minimized.

A power distribution system in which a power source is configured to supply an amount of high-frequency input power to a centralized frequency converter unit. The centralized frequency converter unit is configured to convert the high-frequency input power into low-frequency converted power. Passenger Electronic Device Controllers receive the converted power and distribute it to outlet units. Power management functions may be integrated with the distribution system. For instance, the centralized frequency converter unit can cause to be disabled unused outlet units when the power drawn by the used outlet units exceeds a predetermined threshold.