Appeal No. 2005-0868
Application 09/969,728
Makaran discloses a control system for a five-phase
brushless DC motor including a stator having five windings and a
rotor mounted for rotation relative to the windings (abstract).
If the rotor is rotating in a wrong direction upon startup, a
control circuit energizes preselected windings and waits for the
movement of the rotor to come substantially to a stop and then
energizes the windings in a startup sequence to cause the rotor
to rotate in a correct direction. See id.
The examiner argues that Murakami’s figure 1 shows voltage
detection (answer, page 3), but that figure discloses a current
detecting circuit (14) rather than voltage detection. The
examiner then acknowledges that Murakami’s disclosed detection is
current detection, and argues that a voltage detection tap is
shown in Murakami’s figure 1 (answer, page 5). The examiner,
however, does not point out such a voltage detection tap in that
figure, and none is apparent.
The examiner argues that “Makaran teaches that for
overcurrent, overvoltage and overtemperature protection of a
motor in an automotive or HVAC environment, it is advantageous to
determine the temperature of the motor based on a voltage
detection at the power supply such that a temperature sensor is
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Last modified: November 3, 2007