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US 2019/0157957 A1Published application
Resolver offset correction device and method of eco-friendly vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsJeong Won Rho, Young Un Kim, Jae Sang Lim
Life of this patent
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Abstract
A device and method for correcting a resolver offset of an eco-friendly vehicle is provided. The device and method are capable of correcting the resolver offset based on an angle of torsion occurring in a shaft of a motor rotor. Accordingly, the resolver offset is corrected more accurately.
Claims9
A resolver offset correction device of an eco-friendly vehicle, the resolver offset correction device, comprising:
- a resolver offset determination unit configured to receive a torque command T*, an inverse magnetic flux 1/λ, current commands id* and iq*, currents id and iq fed back by a motor, and d-axis and q-axis voltages Vd* and Vq* monitored upon current control to determine the resolver offset;
- and
- a torsion angle compensator configured to estimate a resolver offset deviation based on a torsion angle of a shaft of a motor rotor for the motor to be operated based on the resolver offset deviation.
A resolver offset correction method of an eco-friendly vehicle, the resolver offset correction method, comprising:
- performing, by a resolver offset determination unit, primary resolver offset correction;
- determining, by the resolver offset determination unit, a current resolver offset;
- determining, by the resolver offset determination unit, a level of a current torque command;
- estimating, by a torsion angle compensator, a resolver offset deviation when the determined level of the torque command determined is a nonzero value;
- and
- estimating, by the torsion angle compensator, the resolver offset deviation and then performing secondary resolver offset correction to operate a motor of the vehicle based on the resolve offset deviation.
3 more elements
Dependencies are inferred from the claim text.