Gate Motor Braking via Setpoint Deviation Detection
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Solution Overview
Problem
Existing methods for preventing gates from falling due to faulty balancing or braking devices require additional mechanical devices, which are difficult to operate and detect, and cannot reliably ensure the door is in a safe standstill position.
Innovation Solution
A method that uses existing door drive, control, and position sensor components to continuously compare setpoint and actual values for direction, speed, and position, initiating a motor braking or stopping process if deviations occur, and signaling defects, allowing the door to be safely moved to a secure position without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional mechanical braking devices are added to prevent gate falling, then safety is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent replaces additional mechanical braking devices with an electromechanical braking system that uses the existing electric motor drive unit. The control device monitors gate position and speed continuously, and activates the motor's braking function electronically when faults are detected, eliminating the need for separate mechanical braking mechanisms while maintaining safety.
Solution Approach 2:
The existing electric motor drive unit is made to serve dual functions: normal gate operation and emergency braking. The control device utilizes the motor's inherent braking capability through electronic control, allowing the system to self-manage safety functions without requiring external specialized components.
2Reliability
If additional mechanical braking devices are added to prevent gate falling, then safety is improved, but ease of repair deteriorates
Solution Approach 1:
The patent eliminates complex mechanical braking devices and replaces them with electronic control of the motor's braking function. This reduces the number of mechanical parts that can wear out or fail, simplifying maintenance and repair to primarily electrical and software components that are easier to diagnose and replace.
Solution Approach 2:
The electric motor drive unit is designed to perform multiple functions including driving the gate, holding it in position, and providing emergency braking. This multi-functionality reduces the total number of components that need maintenance and simplifies repair procedures since a single integrated unit handles all functions.
3Reliability
If mechanical braking devices are added to detect defects, then reliability is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The control device continuously monitors the gate's actual position and speed using sensors and compares these values with expected values during normal operation. When deviations occur indicating potential faults, the system provides feedback and can activate braking, while also signaling the defect for operator awareness and maintenance scheduling.
Solution Approach 2:
The patent replaces mechanical defect detection mechanisms with electronic monitoring systems that use sensors and control algorithms to detect abnormal gate behavior. This electronic approach provides more precise and easier-to-detect fault signals compared to mechanical indicators, improving both detection capability and ease of measurement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method ensures the door is prevented from falling and reliably detects and signals defects, maintaining safety without requiring additional mechanical devices, by utilizing existing components for continuous monitoring and control.
Implementation Method 1
a motor braking process or a motor stopping process is initiated if the actual value deviates from the setpoint value outside of a specified range
Data Source
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AI summary
The invention relates to a method for the safe braking of an electrically driven lifting mechanism in the event of a fault, wherein at least one target value (direction of rotation, travel speed, gate position, motor power, and/or motor current) is determined and compared with an actual value, and wherein, if the actual value deviates from the target value outside a predetermined range, a motor braking or stopping process is initiated. Furthermore, the invention relates to a device for carrying out the method.