| 摘要 |
A method for detecting an open line (10) of a receiver coil (17; 18) of a resolver (16) comprises - providing a pull-up resistor (R1; R3) and a pull-down resistor (R2; R4) at the terminals (7a, 7b; 8a, 8b) on a control device (1) for the signal lines (13a, 13b; 14a, 14b) of the receiver coil (17; 18); - measuring the voltage between the two signal line terminals (7a, 7b; 8a, 8b) of the receiver coil at two sampling times provided symmetrically at the middle of the excitation period; - calculating an offset value by calculating an average value that comprises the measured values measured at the two sampling times in an excitation period; and - identifying an open line (10) if the offset value exceeds a threshold value. |
