| 摘要 |
A method for detecting an open resolver exciter line (10) comprises the following steps: - measuring the signal voltages Us and Uc of the sine coil (17) and the cosine coil (18) of the resolver (15); - comparing the amplitude Us 2 + Uc 2 of the resolver signal to a first threshold value CS1; - starting a diagnostic mode having the following steps if the amplitude Us 2 + Uc 2 does not reach the first threshold value CS1; - applying a constant voltage to the exciter line (11, 12) via a series resistance (25) RLE that is large compared to the ohmic resistance of the exciter coil (16) RE; - measuring the voltage difference UE(tl) at the terminals (5, 6) of the exciter line at a number of points in time ti during at least one excitation period; and - determining the DC voltage component UE,Offs of the voltage difference UE; - determining that there is an open exciter line (10) if, during the excitation period, the DC voltage component UE,Offs is larger than a second threshold value CS2. |
