| 摘要 |
Provided are a control method, a control device and an inverter device that can suppress the heat generated by a capacitor of a direct-current part of an inverter, reduce the overall size of a device and reduce costs. The control method causes an n phase (for example, three phase) alternating-current voltage of a desired size and frequency to be output from an inverter by changing a direct-current voltage time ratio of a direct-current voltage source B that appears at alternating-current output terminals U, V, W by switching semiconductor switching elements UP-WN on and off. The switching elements UP-WN are switched on/off so that a state in which an alternating-current output terminal of one phase is connected to the positive terminal or negative terminal of the direct-current voltage source B is maintained for a fixed period of time, so that an alternating-current output terminal of another phase is connected to the negative terminal or positive terminal of the direct-current voltage source B for a period of time shorter than the fixed period of time, and so that a period of time in which all of the alternating-current output terminals U, V, W are simultaneously connected to the positive terminal or negative terminal of the direct-current voltage source B is minimized in the fixed period of time. |
