DC Power Supply Control Circuitry Temperature Stabilization
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Solution Overview
Problem
Conventional control circuitry for stabilizing DC voltage in power supplies is temperature-sensitive, leading to variations in output voltage due to ambient temperature changes, which is unacceptable in applications requiring extremely stable voltages like mass spectrometry and electron microscopes.
Innovation Solution
Locating temperature-sensitive components of the control circuitry in an enclosure that maintains a substantially constant temperature, using thermally conductive materials and insulation, and employing a temperature control unit to minimize temperature fluctuations within the enclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional control circuitry components are used, then device complexity and cost are reduced, but voltage stability against temperature changes deteriorates
Solution Approach 1:
The control circuitry is divided into two distinct physical groups: temperature-sensitive components housed within a temperature-controlled enclosure, and temperature-insensitive components located outside the enclosure. This segmentation allows differential thermal management, protecting only the vulnerable components while maintaining overall system simplicity.
Solution Approach 2:
A temperature-controlled enclosure acts as an intermediary barrier between the temperature-sensitive control circuitry components and the ambient temperature environment. This enclosure mediates thermal exposure, isolating sensitive components from temperature fluctuations without requiring modification to the components themselves or the entire power supply system.
2Reliability
If expensive temperature-insensitive components are used, then voltage stability improves, but cost increases
Solution Approach 1:
Instead of investing in expensive, inherently temperature-insensitive components, the invention uses standard, cost-effective components and protects them through an external temperature-controlled enclosure. This approach replaces the need for costly specialized components with a more economical protective infrastructure.
Solution Approach 2:
The temperature-controlled enclosure serves as an intermediary protective structure that shields standard components from temperature effects, eliminating the need to purchase expensive temperature-insensitive alternatives while achieving the same stability performance.
3Reliability
If all components are placed in a temperature-controlled enclosure, then voltage stability improves, but device complexity and energy consumption increase
Solution Approach 1:
Only the temperature-sensitive control circuitry components are placed within the temperature-controlled enclosure, while temperature-insensitive components remain outside. This selective segmentation minimizes the volume requiring temperature control, thereby reducing energy consumption while maintaining voltage stability.
Solution Approach 2:
Temperature control is applied locally only where needed - within the enclosure containing sensitive components - rather than uniformly across the entire power supply system. This localized approach optimizes energy efficiency by concentrating thermal management resources only in the critical zone.
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
This approach significantly reduces voltage variations caused by ambient temperature changes, achieving stability within ±1 ppm/°C, thereby ensuring consistent DC voltage output even in extreme temperature conditions.
Implementation Method 1
an enclosure configured to maintain a substantially constant temperature within the enclosure
Data Source
AI summary
Control circuitry for stabilizing a DC voltage outputted by a DC power supply against changes in ambient temperature. The control circuitry includes: measurement circuitry configured to output a measurement voltage representative of a DC voltage outputted by a DC power supply; reference circuitry configured to output a reference voltage; and comparison circuitry configured to compare the measurement voltage with the reference voltage and, based on the comparison, output a control signal for controlling the DC voltage outputted by the DC power supply. At least one temperature-sensitive component of the control circuitry is located in an enclosure configured to maintain a substantially constant temperature within the enclosure.