Power circuits for modular multi-level converters (mmc) and modular multi-level converters

A power circuit arranged to receive a DC electric input signal at first and second connection terminals, and to output an AC electric output signal at a third and a fourth connection terminals,

• the first connection terminal being connected to a first electrically controllable bidirectional two-quadrant switch,
• the second connection terminal being connected to a second electrically controllable bidirectional two-quadrant switch,
• the third connection terminal being connected to a third electrically controllable bidirectional two-quadrant switch,
• the fourth connection terminal being connected to a fourth electrically controllable bidirectional two-quadrant switch,
• the first switch, the second switch, the third switch and the fourth switch being connected to a first node in such a way that the switches are connected between the first node and the respective first, second, third, and fourth connection terminals,
• a first electronic component being connected to the first connection terminal,
• a second electronic component being connected to the second connection terminal,
• a third electronic component being connected to a second node,
• the second node, the first and third electronic component and the first connection terminal being connected,
• a fourth electronic component being connected to a third node,
• the third node, the second and fourth electronic component and the second connection terminal being connected,
• a first capacitor being connected to the second and third node,
• the first, second, third and fourth electronic components being connected to a first coupled inductor in such a way that:
• the first electronic component is connected between the first coupled inductor and the first connection terminal,
• the second electronic component is connected between the first coupled inductor and the second connection terminal,
• the third electronic component is connected between the first coupled inductor and the second node, and
• the fourth electronic component is connected between the first coupled inductor and the third node, wherein further:
• a fifth electronic component is connected to the third connection terminal,
• a sixth electronic component is connected to the fourth connection terminal,
• a seventh electronic component connected to a fourth node,
• the fourth node, the fifth and seventh electronic component and the third connection terminal being connected,
• an eighth electronic component is connected to a fifth node,
• the fifth node, the sixth and eighth electronic component and the fourth connection terminal being connected,
• a second capacitor is connected to the fourth and fifth node,
• the fifth, sixth, seventh and eighth electronic components, are connected to a second coupled inductor in such a way that:
• the fifth electronic component is connected between the second coupled inductor and the third connection terminal,
• the sixth electronic component is connected between the second coupled inductor and the fourth connection terminal,
• the seventh electronic component is connected between the second coupled inductor and the fourth node, and
• the eighth electronic component is connected between the second coupled inductor and the fifth node, and wherein the first, second, third, fourth, fifth, sixth, seventh and eighth electronic components are selected from the group consisting of an electrically controllable switch, a capacitor and a diode.

A power circuit arranged to receive a DC electric input signal at first and second connection terminals, and to output an AC or DC electric output signal at a third and a fourth connection terminals,

• the first connection terminal being connected to a first electrically controllable bidirectional two-quadrant switch,
• the second connection terminal being connected to a second electrically controllable bidirectional two-quadrant switch,
• the third connection terminal being connected to a first electronic component,
• the fourth connection terminal being connected to a second electronic component,
• the first switch and the second switch being connected to a first node in such a way that the switches are connected between the first node and the respective first and second connection terminals,
• a third electronic component being connected to the first connection terminal,
• a fourth electronic component being connected to the second connection terminal,
• a third electrically controllable bidirectional two-quadrant switch being connected to a second node,
• the second node, the third electronic component the third electrically controllable bidirectional two-quadrant switch and the first connection terminal being connected,
• a fourth electrically controllable bidirectional two-quadrant switch being connected to a third node,
• the third node, the fourth electronic component, the fourth electrically controllable bidirectional two-quadrant switch and the second connection terminal being connected,
• a first capacitor being connected to the second and third node,
• the third electronic component, the fourth electronic component, the third electrically controllable bidirectional two-quadrant switch and the fourth electrically controllable bidirectional two-quadrant switch being connected to a first coupled inductor in such a way that:
• the third electronic component is connected between the first coupled inductor and the first connection terminal,
• the fourth electronic component is connected between the first coupled inductor and the second connection terminal,
• the third electrically controllable bidirectional two-quadrant switch is connected between the first coupled inductor and the second node, and
• the fourth electrically controllable bidirectional two-quadrant switch is connected between the first coupled inductor and the third node, wherein further:
• a fifth electronic component connected to a fourth node,
• the fourth node, the first and fifth electronic component and the third connection terminal being connected,
• a sixth electronic component is connected to a fifth node,
• the fifth node, the second and sixth electronic component and the fourth connection terminal being connected,
• a second capacitor is connected to the fourth and fifth node,
• the first, second, fifth and sixth electronic component are connected to a second coupled inductor in such a way that:
• the first electronic component is connected between the second coupled inductor and the third connection terminal,
• the second electronic component connected between the second coupled inductor and the fourth connection terminal,
• the fifth electronic component is connected between the second coupled inductor and the fourth node, and
• the sixth electronic component is connected between the second coupled inductor and the fifth node, and wherein:
• the first, second, fifth and sixth electronic component are diodes, or
• the first and second electronic component are diodes and the fifth and sixth electronic components are capacitors, or
• the first and second electronic component are capacitors and the fifth and sixth electronic components are diodes,
• and wherein further:
• the third and fourth electronic components are electrically controllable switches and the first node is connected to the fourth connection terminal, or
• the third and fourth electronic components are capacitors and the first node is connected to the fourth connection terminal, or
• the first and second electronic components are capacitors and the first node is connected to the third connection terminal.