Motor Temperature Control Using Multi-Level Voltage Limiting
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Solution Overview
Problem
Conventional single-level temperature protection solutions for motors are inadequate in managing temperature fluctuations caused by varying voltage signals, leading to reduced system performance and potential hardware damage.
Innovation Solution
A multi-level temperature control system that acquires real-time motor temperature, compares it with multiple preset thresholds, and adjusts the input voltage amplitude using a corresponding limiting strategy to maintain stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-level temperature protection solution is used with a fixed voltage threshold, then the implementation is simple, but the system performance is excessively affected when voltage is limited, and the temperature cannot stabilize quickly
Solution Approach 1:
The temperature protection system is segmented into multiple levels with different voltage thresholds (first threshold, second threshold, third threshold). Each level corresponds to a specific voltage limiting strategy, allowing the system to respond differently to varying temperature conditions. This segmentation resolves the contradiction by replacing a single complex decision point with multiple simpler, staged decision points that collectively achieve better performance with manageable complexity.
Solution Approach 2:
The voltage limiting strategy is made dynamic by adjusting the limiting level based on real-time temperature measurements. When temperature exceeds the first threshold, a first voltage limiting level is applied; when it exceeds the second threshold, a second level is applied; and when it exceeds the third threshold, a third level is applied. This dynamic adjustment allows the system to optimize performance by applying the appropriate level of voltage limitation for each temperature condition, rather than using a fixed single-level approach.
2Temperature
If voltage limiting is applied excessively to control motor temperature, then the temperature can be controlled, but the system performance is greatly affected
Solution Approach 1:
The system applies partial voltage limiting action by using multiple progressive levels rather than a single excessive limitation. The first voltage limiting level applies a moderate restriction when temperature exceeds the first threshold, the second level applies a stronger restriction when temperature exceeds the second threshold, and the third level applies the strongest restriction when temperature exceeds the third threshold. This partial action approach controls temperature effectively while minimizing performance impact by applying only the necessary level of limitation for each temperature condition.
Solution Approach 2:
The voltage limiting parameter is changed dynamically based on temperature conditions. The system changes the voltage limiting level (from first to second to third level) as the temperature increases and crosses different thresholds. This parameter change strategy allows the system to maintain optimal performance by adjusting the voltage limitation parameter to match the actual temperature condition, rather than applying a fixed excessive limitation.
3Productivity
If voltage limiting is applied insufficiently to control motor temperature, then the system performance is maintained, but the temperature cannot reach a stable range in a short period of time
Solution Approach 1:
The system implements periodic monitoring and adjustment of voltage limiting based on temperature measurements. The controller continuously monitors the motor temperature and periodically adjusts the voltage limiting level according to which temperature threshold is exceeded. This periodic action ensures that the temperature is actively controlled and stabilized within a short period by repeatedly measuring and adjusting the voltage limitation, rather than applying a static insufficient limitation.
Solution Approach 2:
The system uses feedback from real-time temperature measurements to adjust the voltage limiting strategy. The controller receives feedback about the current temperature and automatically selects the appropriate voltage limiting level (first, second, or third level) based on which temperature threshold is exceeded. This feedback mechanism ensures rapid temperature stabilization by continuously monitoring temperature and adjusting voltage limitation accordingly, rather than applying a fixed insufficient limitation that would not respond to temperature changes.
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 system effectively controls motor temperature, enhancing performance and safety while extending the service life of hardware by dynamically adjusting voltage amplitude based on real-time temperature readings.
Implementation Method 1
When the coil is continuously energized, due to the existence of wire resistance, only a small part of the energy is converted into mechanical energy, and most of the energy will be outputted through the coil in the form of thermal energy.
Implementation Method 2
As an electromagnetic component, the main principle of the motor is based on the phenomenon of electromagnetic induction. That is, the energized coil is subjected to force in the magnetic field, and then reciprocates to produce vibration.
Data Source
AI summary
A method and a system for controlling temperature of a motor, and a storage medium are provided. The method includes: acquiring a real-time temperature of the motor; comparing the real-time temperature with multiple preset temperature thresholds corresponding to a multi-level voltage amplitude limiting strategy; and determining the voltage amplitude limiting strategy at a level corresponding to the real-time temperature according to the comparison result and limiting input voltage of the motor with the voltage amplitude limiting strategy at the corresponding level to control the temperature of the motor. Through the multi-level temperature protection solution, when the motor reaches the corresponding temperature threshold, the corresponding limiting strategy comes into effect. Therefore, the system can maintain better performance while limiting the operating temperature for stable operation. Further, the real-time temperature of the system can be effectively controlled, thereby improving user safety and extending the service life of hardware.