Appeal 2007-0939
Application 10/931,274
function for eliminating a disturbance on a two-loop control path, with the
elimination of the disturbance allowing the control path to
provide a single loop correction on either path (Specification 1).
Representative claim 1 is illustrative:
1. A motor controller for a motor receiving three-phase voltage power
from an inverter, said motor controller comprising:
a sensor path for sensing the three-phase voltage supplied by the
inverter to the motor, and a position sensor for sensing an angular position of
the motor, said sensed three-phase voltage being sent through a feedback
loop operable with a first transformation block to transform said sensed
three-phase voltage into two components, and said two components being
associated with two axes;
said controller including summing blocks for receiving said two
components, and comparing said two components to desired components,
and said controller including two separate loops for separately processing
each of said two components back toward said inverter by passing through a
second transmission block, for changing said two
components back into three components; and
a control block for taking a frequency of operation of the motor, and
feeding an ARCTAN function based on said frequency back into said second
transformation block.
THE REFERENCES
The Examiner relies upon the following references as evidence of
anticipation and unpatentability:
Kojima US 5,796,228 Aug. 18, 1998
Anghel US 6,809,496 B2 Oct. 26, 2004
2
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