| 摘要 |
The invention relates to a method and a device for determination of the magnetic characteristics of a lamination stack (3) having a ferromagnetic core (4), having an excitation system (7, 17, 24) which comprises a power supply (8) and an electrical resonant circuit (10) excited by the power supply (8), said resonant circuit comprising a capacitance (9) and an excitation winding (5) provided on the core (4) and electrically connected to the capacitance (9), which excitation winding (5) generates a magnetic flux (12) in the core (4) for a magnetic circuit (13), and having a measuring arrangement (14) which has a measuring winding (6) provided on the core (4) and magnetically coupled to the excitation winding (5). In order to achieve maximum energy efficiency, according to the invention the power supply (8) excites the resonant circuit (10) to an oscillation (23) at the resonant frequencey (f res) of the resonant circuit (10). |
