Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Reexamination Certificate
2005-03-22
2005-03-22
Duda, Rina (Department: 2837)
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
C318S696000, C318S608000, C318S632000
Reexamination Certificate
active
06870346
ABSTRACT:
A method and apparatus for controlling acceleration and velocity of a stepper motor in which a phase offset is selected depending on motor velocity. The optimal phase offset indicates the position of the winding which generates the maximal driving moment. The increase of the driving force and the extension of the range of steady-state movement is achieved for advanced motor coils commutation with constant frequency using velocity feed back and gradual step-wise phase shift where the phase offset is selected depending on rotor velocity. The invention may be effectively applied to servomotors, stepper motors, motors having certain limitations on movement parameters, such as limitations on acceleration and other types of motors.
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Acuid Corporation (Guernsey ) Limited
Duda Rina
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