DC Fan Motor Coil Abnormality Detection Circuit
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Solution Overview
Problem
Existing detection circuits for DC fan motors fail to provide immediate notification and monitoring of coil abnormalities, leading to delayed fan replacement and degraded heat dissipation in miniaturized electronic systems.
Innovation Solution
A detection circuit with a clamper and inverter unit connected to a detection terminal in the DC fan motor's stator, generating a regulated voltage signal for inverted processing, which compares with a predetermined value to produce a notifying signal for remote monitoring and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple fans are combined to form a fan module for effective heat dissipation, then heat dissipation efficiency is improved, but the ability to detect and monitor individual fan status deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the monitoring function into individual detection units, each responsible for monitoring a specific fan's coil status. The detection circuit includes detection units with clamping circuits and inverting circuits that independently process signals from each fan's coil, enabling individual fan status monitoring within the multi-fan module while maintaining effective heat dissipation.
2Device complexity
If the fan module operates without detection circuitry to maintain simplicity, then device complexity is reduced, but reliability of operation deteriorates due to undetected abnormalities
Solution Approach 1:
The patent implements feedback through detection units that continuously monitor coil voltage signals from each fan and provide real-time status information. The clamping circuit captures voltage levels, the inverting circuit processes these signals, and the system generates abnormality detection outputs that feed back to indicate fan status, ensuring reliable operation while keeping the detection circuit relatively simple.
3Loss of time
If immediate detection of coil abnormality is implemented through complex detection circuits, then notification timeliness is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent uses intermediary components - specifically clamping circuits and inverting circuits - as mediators between the coil voltage signal and the abnormality detection output. The clamping circuit intermediates by capturing and holding voltage levels, while the inverting circuit intermediates by processing these captured signals to generate detectable abnormality indicators, achieving immediate detection without requiring overly complex circuitry.
Data Source
AI summary
The present invention relates to a detection circuit for detecting coil abnormality of a DC fan motor, which is applied to a fan. The detection circuit comprises at least one detection unit and a processing unit. The detection unit is used to detect and receive the voltage signal at the center point of the coil set of the fan stator and perform a clamping process and a inverting process on the voltage signal to generate an inverted voltage signal such that the processing unit compares the inverted voltage signal with a predetermined value and determines to generate a notifying signal to a remote device. Thus, the effect of effective real-time monitoring the fan can be achieved.