Electric Winch Brush Temperature Control
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Solution Overview
Problem
Electric winches experience thermal damage due to heat buildup, limiting their operational time and requiring a method to prevent overheating and optimize runtime.
Innovation Solution
Monitoring the temperature of the electric motor's brush using a thermocouple to control the motor's operation, terminating power when the temperature reaches 212°C and reinstating it when it drops to 176°C, utilizing the steepest cooling curve section for efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the electric winch is operated continuously to maximize productivity, then the runtime is extended, but the motor temperature increases to dangerous levels causing thermal damage
Solution Approach 1:
The patent implements temperature monitoring of the brush using a thermocouple, with the control circuit receiving temperature signals and automatically adjusting motor operation accordingly. When the brush temperature reaches 212°C, the control circuit opens the relay to terminate operation, and closes it when temperature drops to 176°C, creating a feedback loop that prevents thermal damage while maximizing runtime
Solution Approach 2:
The patent changes the operating parameters by establishing specific temperature thresholds (176°C to 212°C) for brush operation. By monitoring and controlling temperature within this range, the system allows continuous operation while preventing thermal damage, thus resolving the contradiction between productivity and thermal protection
2Reliability
If the motor is shut down to cool when temperature reaches 212°C, then thermal damage is prevented, but downtime increases reducing productivity
Solution Approach 1:
The patent establishes a temperature operating range (176°C to 212°C) rather than a single shutdown threshold. By allowing operation within this range and only shutting down when 212°C is reached, the system minimizes downtime while ensuring thermal protection, thus resolving the contradiction between reliability and time loss
Solution Approach 2:
The system performs preliminary cooling by allowing the motor to cool from 212°C down to 176°C before restarting operation. This preliminary cooling action prevents thermal damage while minimizing the duration of shutdown, thereby reducing overall downtime and maximizing productivity
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
Prevents motor damage by managing temperature within a safe range, maximizing uptime and minimizing downtime by leveraging the fastest cooling section of the motor's cooling curve.
Implementation Method 1
the temperature is monitored using a thermocouple. Thermocouples provide accurate temperature readings in the form of an electronic signal
Implementation Method 2
the brush is a key component of the electric motor and is the site where much of the heat from operation is generated
Implementation Method 3
the cooling curve of an electric motor is steepest from 212° C. down to 176° C. The rate of cooling slows significantly at temperatures below 176° C.
Data Source
AI summary
Monitoring the temperature of the brush of the motor on an electric winch during operation and restricting the operation of the motor within a cooling range in order to minimize downtime and maximize runtime.