| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for detecting erroneous gate pulse wiring in a power conversion apparatus, making it possible to detect erroneous voltage detection wiring and erroneous switching wiring of arms due to operator's misunderstanding. <P>SOLUTION: The power conversion apparatus, composed of plural semiconductor elements, has one end connected to a three-phase alternating-current power supply and the other end serving as direct current terminals, with a direct-current capacitor connected between the direct current terminals, and is provided with wiring for gate pulses to be applied from a control unit to the semiconductor elements. At one end of the power conversion apparatus, capacitors are connected between lines or in star form, and a reduced voltage is applied for a prescribed time to charge the direct-current capacitor before a gate pulse is applied in prescribed plural patterns from the control unit to the semiconductor elements. The currents in each phase of the three-phase alternating-current power supply at the time of pulse application are detected, and the relationship between the semiconductor elements to which the gate pulse was applied in plural patterns and the currents in each phase of the three-phase alternating-current power supply at this time is stored in memory. From the relationship stored in memory when wiring for gate pulses to be applied from the control unit to the semiconductor elements was sound and the relationship newly stored in memory by following the same procedure described above, an error in the wring used to apply gate pulses may be detected. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
