Switching Element Temperature Protection in Power Supplies
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Solution Overview
Problem
In power supplies with switching elements, incomplete fastening to heat sinks due to vibrations can lead to local thermal runaway, causing system failure due to device destruction.
Innovation Solution
A power supply system with temperature sensors and a processor that detects temperature variations or differences between switching elements, performing temperature protection control by adjusting current supply and cooling performance to prevent thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If switching elements are fastened to the heat sink, then cooling performance is improved, but fastening reliability deteriorates due to vibrations reducing fastening force
Solution Approach 1:
The system continuously monitors the temperature of each switching element via temperature sensors and provides feedback to the controller. When temperature exceeds thresholds or abnormal temperature differences are detected, the controller adjusts cooling control parameters to maintain thermal stability, creating a closed-loop feedback system that compensates for fastening reliability issues.
Solution Approach 2:
The cooling control parameters are dynamically adjusted based on real-time temperature conditions. The system transitions from static fastening to dynamic thermal management by continuously modifying cooling intensity according to detected temperature variations, allowing the system to adapt to changing fastening conditions caused by vibrations.
2Reliability
If temperature monitoring is performed on all switching elements, then temperature failure detection is improved, but device complexity increases due to multiple sensors and control logic
Solution Approach 1:
The system implements differentiated temperature monitoring where each switching element is monitored individually with dedicated temperature sensors. This local quality approach allows precise detection of temperature failures in specific elements without requiring complex system-wide monitoring, as each element's temperature is independently measured and evaluated against its own thresholds.
Solution Approach 2:
The temperature monitoring system is segmented into independent monitoring units for each switching element. Each element has its own temperature sensor and the controller processes temperatures individually, allowing the system to detect local temperature failures without requiring a monolithic complex monitoring system. The segmentation enables modular temperature management.
3Stability of the object's composition
If cooling control parameters are adjusted in real-time, then temperature stability is improved, but control complexity increases due to continuous monitoring and adjustment
Solution Approach 1:
The cooling system performs self-service by automatically adjusting its own control parameters based on temperature feedback. The controller monitors temperatures and autonomously modifies cooling intensity without requiring external intervention or complex manual control systems. This self-regulating mechanism maintains temperature stability while keeping the control system relatively simple.
Solution Approach 2:
Real-time temperature feedback from sensors directly controls the cooling parameters. The system uses simple feedback loops where temperature readings automatically trigger appropriate cooling adjustments, maintaining temperature stability through straightforward cause-effect control rather than complex multi-variable control algorithms.
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 system failure by effectively managing temperature failures in switching elements, ensuring reliable operation and safety.
Implementation Method 1
a plurality of temperature sensors configured to detect the temperature of each of a plurality of switching elements
Implementation Method 2
detect the temperature of each of a plurality of switching elements
Implementation Method 3
a cooling device that lowers temperature of the plurality of switching elements
Implementation Method 4
The cooling device may be a refrigerant cooling-type cooling device, and the processor may increase the cooling performance of the cooling device by increasing a refrigerant flow rate
Data Source
AI summary
An electronic device in accordance with one embodiment may include a load that receives power and performs an operation; and a power supply that supplies power to the load, the power supply including: a rectifier configured to rectify an input alternating current (AC) voltage; a converter including at least one first switching element and configured to convert the rectified input AC voltage into a direct current (DC) voltage; an inverter including a plurality of second switching elements and configured to convert the DC voltage into an AC voltage; a plurality of temperature sensors configured to detect the temperature of each of a plurality of switching elements including the at least one first switching element and the plurality of second switching elements; and a processor configured to determine whether a temperature failure occurs in the plurality of switching elements based on a temperature difference between the plurality of switching elements or a temperature variation amount of each of the plurality of switching elements and performs temperature protection control on the plurality of switching elements based on determining that the temperature failure occurs.