Motorized Roller Lock Detection Circuit for Heat Damage Prevention
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Solution Overview
Problem
Conventional motorized rollers with driving motors face heat damage due to locked rotation, which is often caused by temporary jams, and the miniaturization of components complicates heat dissipation, making it difficult to prevent overheating and maintain system efficiency.
Innovation Solution
A motorized roller system with a lock detecting mechanism and power control means that reduces electric power to the driving motor upon detection of a lock, allowing for stepwise power reduction and intermittent supply to prevent heat damage, thereby eliminating the need for large radiator plates and enabling miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a radiator plate is disposed in the motor driving circuit to prevent heat damage, then heat dissipation is improved, but the device size increases and miniaturization becomes difficult
Solution Approach 1:
The lock detection means detects a lock condition before excessive heat is generated, and the power control means preemptively reduces power supply to prevent heat damage. This preliminary detection and prevention approach eliminates the need for large radiator plates, enabling miniaturization of the motor driving circuit while still protecting against thermal damage.
2Reliability
If power supply is immediately stopped upon lock detection to prevent heat damage, then heat protection is improved, but productivity decreases due to extended停机 time
Solution Approach 1:
Instead of completely stopping power supply upon lock detection, the power control means applies partial power reduction by lowering the power supply to a level that prevents heat damage while maintaining enough power to keep the motor running. This partial action allows the conveyor to continue operating at reduced capacity during temporary jams, improving productivity while still protecting against thermal damage.
3Reliability
If current value is limited to prevent motor burnout, then motor protection is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The system detects lock conditions before excessive heat accumulation occurs and preemptively reduces power supply to safe levels. This preliminary intervention protects the motor from burnout while maintaining heat dissipation capability, as the power reduction prevents heat generation beyond what the miniaturized cooling structures can handle.
Data Source
AI summary
A motorized roller incorporating a driving motor for driving the roller and accompanied with a motor driving circuit for driving the motor, including a lock detecting structure adapted to detect a lock of at least one of the driving motor and the motorized roller and a power control structure adapted to control electric power supplied to the driving motor, wherein the power control structure is adapted to reduce the electric power supplied to the driving motor upon detection of the lock of the at least one of the driving motor and motorized roller by the lock detecting structure.