CURRENT SENSING DEVICE

摘要

The present invention relates to a current sensing device and a technology capable of improving a sensing accuracy by a temperature compensation when a current is sensed using a CT (Current Transformer). The current sensing device according to the present invention comprises: a temperature sensor which senses a temperature of a power conversion unit; a current sensing unit which senses an input current of the power conversion unit; and a central processing unit which controls an operation of the power conversion unit according to a temperature value sensed by the temperature sensor and a current value applied from the current sensing unit. The central processing unit comprises a compensating unit which stores a value for an operation voltage of a diode included in the current sensing unit as a map corresponding to the temperature value of the temperature sensor, and compensates an error in the sensed current by reflecting the operation voltage stored on the map upon sensing the input current.