| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a grid-interconnection inverter device reducing ripples generated in an output current of a full-bridge inverter around a portion where a mean value of the output current becomes zero, so that the efficiency of conversion of DC power to AC power is improved, and noises are reduced, preventing reverse flow of current to a DC power supply circuit, and minimizing a variation rate of the potential of a negative side output terminal of the DC power supply circuit to reduce leakage current. <P>SOLUTION: The inverter device is provided with a power supply line short-circuiting circuit for short-circuiting power supply lines La, Lb between the full-bridge inverter 10 and a single-phase three-line power supply system. When a current of the full-bridge inverter 10 drops during an off-period of a drive pulse signal for the full-bridge inverter 10, the power line short-circuiting circuit operates to short-circuit between the power supply lines La, Lb. <P>COPYRIGHT: (C)2009,JPO&INPIT |
