MOTOR CURRENT DETECTION DEVICE AND AIR CONDITIONING DEVICE

• Main Authors: HASHIMOTO, Masafumi, MAEDA, Hirohito, SHIMATANI, Keisuke, YAGI, Satoshi, IKEDA, Motonobu
• Format: Patent
• Language: English; French; German
• Published: 19.07.2017
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROL OR REGULATION THEREOF; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The present invention provides a motor current detecting device an accurate motor current can be obtained and an air conditioning apparatus comprising this motor current detecting device. A motor current detecting device (9) comprises a GND wire (93), an instantaneous current detecting unit (95), an average current detecting unit (96), and a calculation unit (99). On the GND wire (93), a motor current (Im) that has been passed through a second fan motor (81) and a drive current (Id) that has been passed through a second motor driver (82) for driving the second fan motor (81). The instantaneous current detecting unit (95) detects an instantaneous value of the sum of the motor current (Im) and the drive current (Id) flowing on the GND wire (93). The average current detecting unit (96) detects an average value of the sum of the motor current (Im) and the drive current (Id) flowing on the GND wire (93). The calculation unit (99) calculates the motor current (Im) on the basis of the detection results of the instantaneous current detecting component (95) and the average current detecting unit (96).