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.
Method and circuit for detecting an open line of the sine/cosine receiver coil of a resolver
2020-05-05
Patent
Elektronische Ressource
Englisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |
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