Method for closing a motor driven window
AssigneeMotorola, Inc.
InventorRobert Gerbetz
Life of this patent
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Abstract
A method for closing a motor-driven window is disclosed, including the steps of raising the window after the window has been stopped; evaluating the torque after initially raising the window; and stopping the window if the pinch force exceeds a predetermined limit. Torque is preferably estimated according to the present invention using the sum of dynamic torque, electromagnetic torque, and core loss compensation. Consistent values of torque are estimated during window starts and stops, which is beneficial in providing accurate pinch force measurements and avoiding false pinch indications.
Claims10
A method for closing a motor-driven clement, the steps comprising:
- raising the element after the element has been stopped;
- evaluating a torque after initially raising the element and during an initial element start period;
- and
- stopping the element if a pinch force exceeds a predetermined limit;
- wherein the step of evaluating the torque after initially raising the element and during the initial element start period includes a step of determining core loss compensation.
A method for closing a motor-driven element the method comprising the steps of:
- raising the element after the element has been stopped;
- evaluating electromagnetic torque and dynamic torque during an initial element start period immediately after the element is first raised;
- determining a core loss compensation during the initial element start period immediately after the element is first raised;
- providing a pinch force measurement;
- and
- stopping the element if the pinch force measurement exceeds a predetermined limit.
A method for closing a motor-driven window, the method comprising the steps of:
- raising the window after the window has been stopped;
- determining electromagnetic torque during an initial window start period immediately after the window is first raised;
- determining dynamic torque during the initial window start period;
- determining core loss compensation during the initial window start period;
- calculating a torque based upon electromagnetic torque, dynamic torque, and core loss compensation,
- providing a pinch force measurement;
- and
- stopping the window if a pinch condition exists.
Dependencies are inferred from the claim text.