| 摘要 |
PURPOSE: To reduce the number of the anode reactors of an inverter device, by interposing the anode reactors between the parallel-connection point of the one-input-sides of switching elements in its inverter part and its DC power supply part collectively and serially. CONSTITUTION: An inverter device is different from prior art ones on the point that an anode reactor (AL) Lc having the same inductance value as the serial anode reactors of a prior art one is interposed between a parallel-connection point Pa of the one-input-sides of switching elements (SW) Sa, Sc and a DC power supply part 2 collectively and serially, and both the ends of the reactor Lc are connected in parallel by a reflux part 10 comprising the series connection of a diode Dg and resistor Rc. For example, in a positive-side regenerative mode of the SWs Sa, Sd being in ON-states and the SWs Sb, Sc being in OFF- states, currents flow into the power supply side and a load side, and in case of the shifting to a reflux mode, the ALLc is not present in the reflux loop but is present in the regenerative loop. Therefore, the current in the reflux loop builds up, and the build-up of the currents in case of the switching elements being in ON-states can be suppressed. |
