Refrigeration – Automatic control – Of external fluid or means
Reexamination Certificate
2006-04-04
2006-04-04
Jiang, Chen Wen (Department: 3744)
Refrigeration
Automatic control
Of external fluid or means
C361S152000, C361S170000
Reexamination Certificate
active
07021072
ABSTRACT:
Systems and methods for providing a current control loop for an actuator. A typical system includes a current command controller setting a command current, the current command controller being coupled to a drive circuit used to drive the actuator and a sampling module sampling a motor current of the actuator. The system also includes a summation module calculating a current error based on the motor current, the current error being calculated by subtracting the motor current from the command current. The current error is used to compensate for an error in the motor current of the actuator. The sampling module can include a switch and a capacitor coupled in parallel with the resistor when the switch is on, a charge on the capacitor being proportional to the voltage drop across the resistor. Methods for setting a maximum control current and for providing the current control loop are also illustrated.
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McMillan Scott D.
Mrozek Greg T.
Ansems Gregory M.
Honeywell International , Inc.
Jiang Chen Wen
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