Technique for compensating for abnormal output of resolver for environmentally friendly vehicle

• Main Authors: JEONG KANG HO, KIM BUM SIK, CHUNG TAE HWAN
• Format: Patent
• Language: Chinese; English
• Published: 19.06.2013
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

Disclosed is a technique for compensating for an abnormal output of a resolver. More specifically, a central processing unit (CPU) sets a current motor position angle before compensation thetan,ORG as a current motor position angle thetan and obtains a motor position change Deltathetan[rad] between a current sampling [n] and a previous sampling [n-1] and a motor position change Deltathetan-1[rad] between the previous sampling [n-1] and a more previous sampling [n-2]. Subsequently, a variable A is calculated based on the above angles. The CPU determines whether to perform the compensation by comparing the calculated variable A and a calibration variable K and calculates a current motor position angle for compensation thetan[rad]. Finally, the CPU compensates for the absence of motor rotor position information with the calculated current motor position angle for compensation thetan[rad].