| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inverter device that detects a main circuit voltage with good response. <P>SOLUTION: When a main circuit voltage is intermediate between a regeneration voltage and a low voltage, an output voltage from a control CPU outputs the regeneration voltage and a voltage proportional to the low voltage alternately to compare it with the main circuit voltage. When a regeneration voltage is being outputted, regeneration detection is performed. When the low voltage is being outputted, low-voltage detection is performed. These detections are repeated to detect the main circuit voltage. When the main circuit voltage rises up to an intermediate one between an overvoltage and the regeneration voltage; a regeneration output is performed by the regeneration detection, and the output voltage from the CPU outputs the regeneration voltage and a voltage proportional to the overvoltage alternately to compare it with the main circuit voltage. When the regeneration voltage is being outputted, the regeneration detection is performed. When the overvoltage is being outputted, the overvoltage detection is performed. These detections are repeated and when the main circuit voltage rises above the overvoltage, the overvoltage output is performed by the overvoltage detection. <P>COPYRIGHT: (C)2007,JPO&INPIT |
