| 摘要 |
<P>PROBLEM TO BE SOLVED: To carry out current balance compensation control on an inverter output current with higher accuracy, in a device that is configured by connecting multiple inverters in parallel and operates one or more induction motors or synchronous motors. <P>SOLUTION: A parallel operation controller for inverters includes a computation device that carries out current balance compensation on inverters operating in parallel. In conventional computation methods therefor, computation is carried out using the instantaneous output current value, output frequency value, and direct-current voltage value of each inverter. The computation device of the present invention also refers to the direct current value and three-phase current effective value of each inverter. As a result, more accurate compensation operation can be carried out. <P>COPYRIGHT: (C)2011,JPO&INPIT |
