5. Four-quadrant chopper control modes
In the case of four-quadrant choppers, there are different ways of controlling the switches. Some improve the chopper's efficiency, with only one switch in conduction at a time, while others improve inverter performance.
5.1 Additional arm control
The simplest way to control the switches is to send the signals described in figure 25 to each of the arms, complementing the duty cycles, as shown in figure 31 . The left arm thus sees the command (1 - α)U, while the right one sees αU. The...
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Four-quadrant chopper control modes
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