METHOD AND APPARATUS FOR INITIALIZATION AND OPERATION OF FIELD-COMMUTATED MOTORS AND MACHINES INCORPORATING FIELD-COMMUTATED MOTORS

摘要

As an invention for a method and apparatus for calibrating a field commutation motor 10 when there is a load, initializing the motor 10 is typically performed by reading data representative of the angle of the rotor in an uncorrected coordinate system, To a coordinate system having a known relation to the exciting coil (17). Each data can be used to energize the exciting coil 17 in an appropriate sequence and at an appropriate timing to obtain the desired speed, torque, direction, or rotation, etc. of the motor 10. [ A test voltage having a known orientation is applied to one of the stator and the rotor (whichever is on which the exciting coil 17 is mounted), and attention is paid to the angle of the rotor generated by application of each test voltage. An error angle between the uncorrected coordinate system and a known coordinate system is determined as a function of the angle of the rotor generated by application of the test voltage. An apparatus embodying the present invention may include a processor 26, a power source 12, a user input element 35, and a voltage and / or current sensor 35. The processor 26 may comprise suitable means for implementing the above-described method steps.