MOTOR CURRENT CALCULATION DEVICE AND AIR CONDITIONING DEVICE

摘要

A motor current calculation device (9) includes: a GND wire (94); a current detection unit (95); a decision unit (96a); and a calculation unit (96b). In the GND wire (94) are flowing a motor current (Im) electrically connected to a second fan motor (81) and a drive current (Id) electrically connected to a second motor driver (82) for driving the second fan motor (81). The current detection unit (95) detects a sum of the motor current (Im) and the drive current (Id) flowing in the GND wire (94). The decision unit (96a) decides, as the drive current (Id), the detection result of the current detection unit (95) when the second fan motor (81) is not rotating. The calculation unit (96b) subtracts the drive current (Id) decided by the decision unit (96a) from the detection result of the current detection unit (95) when the second fan motor (81) is rotating so as to calculate the motor current (Im).