Disclosed is a technology capable of effectively diagnosing a battery with high accuracy using a Nyquist diagram. The battery diagnosing apparatus includes an impedance measuring module configured to measure an impedance according to a change of frequency ...

A method and an apparatus for determining a phase (¸) and a frequency (É) of an electric quantity being associated with an operation of an electrical device are described. The method comprises extracting a fundamental component (V ±1 , V ²1 ) of the el...

The invention is related to a method, resonance handling device and computer program product for handling resonances in a power transmission system. The resonance handling device (28) comprises a resonance frequency determining unit (22) configured to obta...