Temperature-Based Power Supply Restart Circuit for Capacitor Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power supply systems face challenges in preventing non-startup due to low temperatures, as they often rely on assumptions about temperature changes and capacitor discharge times, leading to incomplete discharge and prolonged wait times for device restarts.
Innovation Solution
A power supply circuit with a switch, temperature sensor, and processor that controls the switch to create a short-circuit or open connection based on temperature measurements, setting a predetermined standby time for capacitor discharge, ensuring complete discharge and preventing logic circuit malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed standby time is used for capacitor discharge, then the control logic is simple, but the discharge may be incomplete at low temperatures leading to logic circuit malfunctions
Solution Approach 1:
The standby time is changed from a fixed value to a dynamic value that varies with temperature. The processor determines the standby time based on temperature sensor readings, allowing the system to adapt the discharge time to actual thermal conditions. This resolves the contradiction by making the control parameter dynamic rather than static, ensuring reliable discharge without overly complex control logic.
Solution Approach 2:
The standby time parameter is adjusted based on temperature conditions. At lower temperatures where capacitor discharge is slower, the processor extends the standby time to ensure complete discharge. This parameter change approach allows the system to maintain reliability across different operating conditions while keeping the control mechanism relatively simple.
2Reliability
If the standby time is extended to ensure complete capacitor discharge, then logic circuit malfunctions are prevented, but the device restart time is prolonged
Solution Approach 1:
The standby time is dynamically adjusted based on temperature measurements rather than using a conservative fixed value. This allows the system to minimize restart time when conditions permit (higher temperatures where discharge is faster) while still ensuring reliable discharge when needed (lower temperatures). The dynamic approach resolves the time-reliability tradeoff by optimizing standby duration to actual conditions.
Solution Approach 2:
The standby time parameter is changed from a uniform fixed value to a temperature-dependent variable. The processor uses temperature sensor data to determine appropriate standby durations, extending time only when necessary for complete discharge. This parameter adaptation reduces unnecessary waiting time while maintaining reliability across different thermal conditions.
3Reliability
If temperature-based control is implemented, then capacitor discharge completeness is improved, but the device complexity increases due to additional sensors and control logic
Solution Approach 1:
The system uses its own temperature sensor (already present for monitoring) to determine capacitor discharge status and control standby time, rather than adding external measurement devices. The processor leverages existing thermal information to self-regulate the discharge process, improving reliability without significantly increasing system complexity.
Solution Approach 2:
The temperature sensor serves dual purposes: monitoring operating conditions and determining capacitor discharge completeness. By making the temperature measurement multi-functional, the system achieves improved discharge control without adding dedicated hardware, thus limiting the increase in device complexity.
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
Ensures successful restart of the power supply unit by setting sufficient standby times based on temperature, eliminating residual charges and preventing logic circuit malfunctions, thus avoiding prolonged wait times for temperature changes.
Implementation Method 1
a sensor unit which measures a temperature
Implementation Method 2
a switch which operates to cause a short-circuit to occur between a DC power supply and an input terminal of the power supply unit
Data Source
AI summary
It becomes possible to succeed in restarting a power supply unit.A power supply circuit includes the power supply unit which supplies DC power to a CPU, a switch which operates to cause a short-circuit to occur between a DC power supply and an input terminal of the power supply unit or to open a connection between the DC power supply and the input terminal of the power supply unit, a temperature measurement unit which measures a temperature and a processor which controls the switch to open the connection in a case of deciding that the DC power is not supplied to the CPU even when controlling the switch to cause the short-circuit to occur and controls the switch to cause the short-circuit to occur after a predetermined time elapses after controlling the switch to open the connection. The predetermined time is set on the basis of the temperature that the temperature measurement unit measures.