Hot Surface Igniter PWM Temperature Control for Longer Service Life
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Solution Overview
Problem
Conventional hot surface igniters suffer from short service life due to inaccurate temperature control and adverse operating conditions, particularly in applications requiring continuous operation, such as the automobile industry, where voltage fluctuations and varying environments lead to overheating and reduced durability.
Innovation Solution
A temperature control system for hot surface igniters that includes a power supply module, storage module, collection module, determination module, and control module to precisely adjust output voltage based on temperature differences and electrical parameters, ensuring the igniter operates at a set target temperature and preventing anomalous power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If constant-voltage power supply method is used, then the igniter can reach high temperature quickly, but the temperature is not adjustable and service life is reduced
Solution Approach 1:
The patent applies dynamics principle by transitioning from constant-voltage power supply to pulse-width modulation (PWM) control, making the voltage dynamic and adjustable. The control module varies the duty cycle of PWM signals to regulate the average voltage applied to the heating element, enabling temperature adjustment while maintaining rapid heating capability and extending service life through optimized thermal cycles.
Solution Approach 2:
The patent implements parameter changes by modifying the voltage parameter from fixed constant voltage to variable PWM voltage. The control module adjusts the duty cycle parameter of the PWM signal to control the average power delivered to the heating element, achieving precise temperature control and extending service life through parameter optimization.
2Duration of action of moving object
If the igniter operates continuously in special fields, then it meets application requirements, but the service life becomes shorter due to voltage fluctuations and complex working conditions
Solution Approach 1:
The patent applies feedback principle by implementing temperature detection and control loops. The detection module monitors the temperature of the heating element in real-time and feeds this information back to the control module, which adjusts the PWM duty cycle accordingly. This closed-loop feedback system enables continuous operation under varying conditions while maintaining optimal temperature, thereby extending service life.
Solution Approach 2:
The patent uses dynamics principle to adapt to complex working conditions through real-time parameter adjustment. The control module dynamically modifies the PWM voltage output based on detected temperature and operational conditions, enabling the igniter to maintain optimal performance during continuous operation despite voltage fluctuations and environmental variations.
3Device complexity
If temperature control is not precise, then the control system is simple, but over-temperature occurs and service life is reduced
Solution Approach 1:
The patent implements feedback principle through a closed-loop temperature control system. The detection module continuously monitors heating element temperature and provides feedback to the control module, which adjusts the PWM output to maintain optimal temperature. This feedback mechanism achieves precise temperature control without excessive system complexity, preventing over-temperature damage and extending service life.
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 achieves precise temperature control, prolongs the service life of the hot surface igniter, and prevents damage by stopping power supply in anomalous conditions, thereby enhancing reliability and durability.
Implementation Method 1
a voltage is applied to the hot surface igniter by a power source, and then a heating element of the hot surface igniter operates for ignition
Implementation Method 2
a thermoelectric signal data table pre-storing a relationship between a voltage value and a temperature value
Data Source
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Figure 2
AI summary
Disclosed in the present invention is a temperature control system for a hot surface igniter, said system comprising: a power supply module, for supplying power to the control system; and further comprising: a storage module, which pre-stores a set target temperature; a collection module, for collecting and obtaining the current temperature of the hot surface igniter; a determination module, for determining whether the current temperature of the hot surface igniter matches the target temperature; a calculation module, for obtaining the temperature difference value between the target temperature and the current temperature by calculation using the current temperature when the current temperature does not match the target temperature, and obtaining a voltage control quantity according to the temperature difference value; and a control module, for automatically controlling an output voltage of the power supply module according to the obtained voltage control quantity until it is determined that the current temperature of the hot surface igniter matches the target temperature. The present invention can enable the hot surface igniter to obtain a suitable voltage to ensure that the hot surface igniter operates at a set target temperature, thereby realizing precise control over the operating temperature of the hot surface igniter, and increasing the service life of the hot surface igniter