Motor Controller Power Failure Detection Adaptation
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Solution Overview
Problem
Conventional motor controllers require complex and costly circuit configurations to determine optimal power failure detection conditions, leading to varying power failure tolerance and increased machine stoppages, which affects availability.
Innovation Solution
A motor controller with a rectifier, AC voltage detector, power failure detector, and power failure detection condition determiner that adjusts regulation time and voltage based on power failure tolerance, minimizing unnecessary machine stoppages by dynamically determining and modifying detection conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional techniques store multiple detection results and perform switching to determine power failure detection conditions, then power failure detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the parameter of regulation time dynamically based on the detected power failure tolerance. Instead of using fixed or pre-stored detection conditions, the system calculates and adjusts the regulation time parameter in real-time according to the actual power failure tolerance, thereby achieving accurate detection without requiring multiple stored detection results or complex switching circuits.
2Device complexity
If conventional techniques use fixed regulation time and voltage thresholds, then device complexity is reduced, but power failure detection accuracy decreases leading to increased machine stoppages
Solution Approach 1:
The patent makes the regulation time dynamic by continuously adjusting it based on the detected power failure tolerance. The system transitions from fixed thresholds to adaptive thresholds that change according to actual operating conditions, thereby improving detection accuracy while maintaining relatively simple circuit configuration through real-time parameter adjustment rather than multiple fixed circuits.
3Reliability
If power failure detection conditions are optimized for each machine, then reliability is improved, but device complexity increases due to machine-specific configurations
Solution Approach 1:
The patent enables the motor controller to automatically detect its own power failure tolerance and adjust its detection conditions accordingly. The system performs self-diagnosis by measuring the actual power failure tolerance and uses this information to optimize its own detection parameters, eliminating the need for external configuration or machine-specific presettings while improving reliability.
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
The solution optimally determines power failure detection conditions, reducing the frequency of machine stoppages and maintaining availability by dynamically adjusting regulation time and voltage thresholds, thus preventing increased costs and circuit complexity.
Implementation Method 1
a rectifier (1) for converting alternating-current (AC) power supplied from an AC power supply (10) into direct-current (DC) power
Implementation Method 2
an AC voltage detector (3) for detecting an AC voltage value of the AC power supply (10)
Data Source
AI summary
A motor controller includes a rectifier for converting AC power supplied from an AC power supply into DC power and outputting the DC power; an AC voltage detector for detecting an AC voltage value of the AC power supply and outputting the AC voltage value as a detection value; a power failure detector for determining that a power failure is occurring, when a state in which the outputted detection value is equal to or lower than a regulation voltage has continued for a regulation time or more; and a power failure detection condition determiner for determining or modifying the regulation time.