A converter for symmetrical reactive power compensation has phase legs whose associated phases of a three-phase AC voltage network can be connected and are interconnected in an insulated star connection. The first phase leg is devoid of sub modules. The second and third phase legs each has a phase module with series-connected bipolar sub modules. A control device controls phase module currents and determines voltages to be set at each phase module. A decoupling unit calculates correction voltages for each phase module as a function of a first connection voltage between the first and second phase legs, a second connection voltage between the second and third phase legs and a first and/or a second control voltage each derived from target currents and the phase module currents of the second or third phase legs. The voltages to be set are derived from the control voltages and correction voltages.

According to one embodiment, a control device is connected to at least three or a plurality of switching controllers converting AC signals into DC signals and outputting the DC signals or converting DC signals into AC signals and outputting the AC signals. The control device is configured to generate the same number of carrier frequencies as the switching controllers, rearrange the generated carrier frequencies in ascending or descending order and calculate a difference between two adjacent carrier frequencies among the generated carrier frequencies, and if all the calculated differences between adjacent carrier frequencies are different, set one of the generated carrier frequencies as the carrier frequency of one of the switching controllers in order.

According to one embodiment, a control device is connected to at least three or a plurality of switching controllers converting AC signals into DC signals and outputting the DC signals or converting DC signals into AC signals and outputting the AC signals. The control device is configured to generate the same number of carrier frequencies as the switching controllers, rearrange the generated carrier frequencies in ascending or descending order and calculate a difference between two adjacent carrier frequencies among the generated carrier frequencies, and if all the calculated differences between adjacent carrier frequencies are different, set one of the generated carrier frequencies as the carrier frequency of one of the switching controllers in order.

Provided herein is a fusion energy extraction circuit (FEEC) device having a grid-tied bidirectional converter and a resonant converter. The resonant converter can include an inverse cyclotron converter with two or more or quadruple plates and a plurality of circuit switches. The bidirectional converter can include a three-phase grid-tied converter. The FEEC device is capable of decelerating plasma particle beams, thereby extracting the energy from the deceleration, converting the extracted energy to electric energy, and sending the electric energy to a power grid.

An integrated power conversion apparatus for an electric vehicle according to the present disclosure includes a first H-bridge converter with one side connected to a high voltage battery; a three-winding transformer in which a primary winding is connected to the other side of the first H-bridge converter; a second H-bridge converter with one side which is connected to a secondary winding of the three-winding transformer; an AC-DC converter in which one side is connected to the other side of the second H-bridge converter and the other side is selectively connected to a motor or a power system; and a low voltage stage converter in which one side is selectively connected to a tertiary winding of the three-winding transformer through a selective switch and the other side is connected to a low voltage battery.

An integrated power conversion apparatus for an electric vehicle according to the present disclosure includes a first H-bridge converter with one side connected to a high voltage battery; a three-winding transformer in which a primary winding is connected to the other side of the first H-bridge converter; a second H-bridge converter with one side which is connected to a secondary winding of the three-winding transformer; an AC-DC converter in which one side is connected to the other side of the second H-bridge converter and the other side is selectively connected to a motor or a power system; and a low voltage stage converter in which one side is selectively connected to a tertiary winding of the three-winding transformer through a selective switch and the other side is connected to a low voltage battery.

Provided is a control board for a distributed control system for power converter to be connected to a power module and to be connected to a controller board. The control board includes a processing unit (to command the power module from references received from the controller board, a set of voltage measurements delivered by the power module and data received from the power module, and to deliver data to the controller board.

Provided is a control board for a distributed control system for power converter to be connected to a power module and to be connected to a controller board. The control board includes a processing unit (to command the power module from references received from the controller board, a set of voltage measurements delivered by the power module and data received from the power module, and to deliver data to the controller board.