Patent ID: 9450508
Filing Date: 2016-09-20
CPC Classification: H02M

Claim Text:
1. A modular switch for an electrical converter controlling multi-phase voltage, comprising: a first series circuit including a first controllable power semiconductor component and a first diode; a second series circuit including a second diode and a second controllable power semiconductor component, a connecting point between the first power semiconductor component and the first diode forming a first terminal of the modular switch and a connecting point between the second diode and the second power semiconductor component forming a second terminal of the modular switch; and a capacitor, the first series circuit and the second series circuit and the capacitor being connected parallel to each other, wherein voltage at the capacitor is adjusted by adjusting a time interval for actuating the first controllable power semiconductor component, and adjusting a time interval for actuating the second controllable power semiconductor component wherein a current flows from the first terminal in a direction of the second terminal, and wherein the modular switch corresponds to a phase of the multi-phase voltage and is connected in series with another modular switch for the same phase, an input of the modular switch being connected with an output of the other modular switch for the same phase; and wherein an output of the modular switch is connected to outputs of a plurality of modular switches of other phases and an input of the other modular switch of the same phase is connected to inputs of a plurality of modular switches of other phases; and wherein first and second controllable power semiconductor components of each modular switch are correspondingly activated for each phase, by changing the time interval to dynamically control voltage for the corresponding phase to be approximately equal to voltage of other phases of the multi-phase voltage.