Power converting apparatus suppressing switching noise by controlling switching operation

摘要

A power converter for effectively reducing switching noise is provided. The power converter comprises a capacitor 111; switching devices Q11a and Q11b connected to the capacitor 111 in parallel; and a controller 105 that controls each switching device individually to perform switching operations. Each of the switching devices Q11a and Q11b forms a closed circuit together with the capacitor 111. The controller 105 controls the switching devices Q11a and Q11b to perform switching operations of switching ON or OFF at different timings such that at least two closed circuits including the switching devices Q11a and Q11b mutually cancel ringing voltages occurring therein, each ringing voltage occurring due to the switching operations performed by a corresponding switching device and having a frequency defined by an inductance of a corresponding closed circuit and an output capacity of a switching device included in the corresponding closed circuit.

主权项

1. A power converter comprising:
a capacitor; is plurality of switching devices connected to the capacitor in parallel; and a controller configured to control each switching device individually to perform switching operations, wherein the plurality of switching devices are connected to one another in parallel, each switching device forms at closed circuit together with the capacitor, and the controller controls, for at least two closed circuits, the plurality of switching devices included therein to perform the switching operations of switching ON or OFF at different timings such that the at least two closed circuits mutually cancel ringing voltages occurring therein, each ringing voltage occurring due to the switching operations performed by a corresponding switching device and having a frequency defined by an inductance of a corresponding closed circuit and an output capacity of a switching device included in the corresponding closed circuit.