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Electric controller system with bumpless transfer
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ApplicationNo. 10241124 filed on 09/11/2002
US Classes:307/112, SWITCHING SYSTEMS307/139, Switch actuation318/609, "Reset" systems (P.I.)700/41, Proportional-Integral (P-I)318/610, With rate (P. I. D.) (e.g., reset windup prevention)318/566Maneuver, force, or load-limiting
ExaminersPrimary: Sircus, Brian
Assistant: Kaplan, Hal I.
Attorney, Agent or Firm
International ClassesH01H 9/54
AbstractA bi-directional smooth transition switch with bumpless transfer is disclosed. It is composed of two feedback loops, each with feedback and forward-loop compensators. During loop operation, one feedback loop is active, while the other is inactive. The smooth transition switch operates in the following manner. The switch output is measured. Next, an error signal is formed as the difference between the forward-loop compensator output and the switch output, which is fed to the input of a high gain feedback compensator. The output of the feedback compensator is a feedback signal. When no switching occurs, the feedback signal remains zero in the active loop, and the output signal of the inactive loop will track the output signal of the active loop. When the switchover occurs, the inactive loop will replace the original active loop and provide smooth transition switch's output.