Method for the automatic adjustment of a resolver of an electric machine

摘要

A method for adjusting a resolver of an electric machine is provided. A resolver rotor is an adjustable element of the resolver and mounted by friction on a support so that a relative angular position with respect to the support may be adjusted by exerting a torque between the resolver rotor and the support. The method includes steps of: measuring an offset angle of the resolver to be corrected; as long as the offset is not less than an predetermined tolerance, locking the resolver rotor with respect to a resolver stator; launching the correction by energizing a main stator of the electric machine so that the electric machine develops a correction torque causing rotation of the resolver rotor with respect to a shaft of the electric machine by the measured offset; and freeing the resolver rotor. Subsequently the method returns to the measuring step.

主权项

1. A method for adjusting a resolver of an electric machine,
the electric machine including a main stator and a main rotor, the main rotor being arranged on a shaft mounted rotatably with respect to the main stator, the resolver of the electric machine including a resolver stator and a resolver rotor, the resolver stator being mounted on a support securely interlocked with the main stator, the resolver rotor being mounted on a support securely interlocked with the shaft, the resolver stator being mounted facing the resolver rotor and close to an axial end of the electric machine, and the resolver rotor being an adjustable element of the resolver and being mounted by friction on a support thereof so that a relative angular position of the resolver rotor with respect to the support is modifiable for initial adjustment by exerting a torque between the resolver rotor and the support, the method comprising steps of:
locking a relative position of the resolver rotor with respect to the resolver stator; andenergizing the main stator so that the electric machine develops a correction torque for causing rotation of the resolver rotor with respect to the shaft of the electric machine by a predetermined correction angle.