| 摘要 |
PROBLEM TO BE SOLVED: To provide, with less overhead, a highly reliable backup function when a high voltage measurement voltage-dividing circuit malfunctions.SOLUTION: An inverter control device according to the present invention comprises: a discharge circuit unit connected to a smoothing capacitor in parallel via a DC line, the smoothing capacitor being connected to an inverter circuit; and a control unit that controls the inverter circuit. The discharge circuit unit has: a discharge resistance that discharges the smoothing capacitor; the discharge switching element connected to the discharge resistance in series; and a current sensor that detects current flowing in the discharge resistance. The control unit estimates a voltage between the DC lines on the basis of the detection value of the current sensor when the discharge switching element is in a conductive state.SELECTED DRAWING: Figure 1 |
