Abstract:
A multi-level voltage converter includes a multi-point converter circuit and at least one full bridge inverter circuit. The multi-point converter circuit is configured for converting a DC voltage into an intermediate multi-level voltage. The full bridge inverter circuit is electrically connected in series with the multi-point converter circuit and configured for receiving the intermediate multi-level voltage to generate a multi-level output voltage corresponding to a single phase output.
Abstract:
A converter circuit for switching a large number of switching voltage levels is specified, in which a first switching group is provided for each. Second switching groups are provided, each having a first, second, third, fourth, fifth and sixth drivable bidirectional power semiconductor switch and capacitor. The first drivable bidirectional power semiconductor switch is reverse-connected in series with the second drivable bidirectional power semiconductor switch, the third drivable bidirectional power semiconductor switch is reverse-connected in series with the fourth drivable bidirectional power semiconductor switch, the first drivable bidirectional power semiconductor switch is connected to the capacitor, the third drivable bidirectional power semiconductor switch is connected to the capacitor, the fifth drivable bidirectional power semiconductor switch is directly connected to the fourth drivable bidirectional power semiconductor switch, and the sixth drivable bidirectional power semiconductor switch is directly connected to the second drivable bidirectional power semiconductor switch.
Abstract:
A power module, which is connected to a power source, includes a rectifying unit, a filtering unit and an inverter. The rectifying unit has three legs. The filtering unit is connected to the rectifying unit, and the inverter is connected to the filtering unit. One of the three legs has two switching elements connected in series, and another one of the three legs has two rectifying elements connected in series. In addition, a power conversion apparatus including the power module is also disclosed.
Abstract:
A switchgear cell having a group of connection is disclosed, with the group of connection having a first and a second controllable bidirectional power semiconductor switch and a capacitor. In order to reduce the stored electrical energy and to save space, the group of connection can have a third, fourth, fifth and sixth controllable bidirectional power semiconductor switch and the first controllable bidirectional power semiconductor switch can be connected back-to-back in series with the second controllable bidirectional power semiconductor switch, the third controllable bidirectional power semiconductor switch can be connected back-to-back in series with the fourth controllable bidirectional power semiconductor switch, the capacitor can be connected to the connection point of the first controllable bidirectional power semiconductor switch to the second controllable bidirectional power semiconductor switchand to the connection point of the third controllable bidirectional power semiconductor switch) to the fourth controllable bidirectional power semiconductor switch, the fifth controllable bidirectional power semiconductor switch can be connected to the connection point of the first controllable bidirectional power semiconductor switch to the second controllable bidirectional power semiconductor switch, and to the fourth controllable bidirectional power semiconductor switch, and the sixth controllable bidirectional power semiconductor switch can be connected to the connection point of the third controllable bidirectional power semiconductor switch to the fourth controllable bidirectional power semiconductor switch and to the second controllable bidirectional power semiconductor switch.