Microcontroller Power Supply Zero-Crossing Heat Reduction
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Solution Overview
Problem
There is a need for compact, low-component-count power supplies that minimize heat output for small electronic devices sensitive to heat, as the available space for power supplies in modern electronics is limited and heat-sensitive.
Innovation Solution
A microprocessor-controlled, dynamically adjusted AC to DC switching power supply that operates at the lowest point of the AC voltage waveform, symmetrically around the zero crossing, using a minimal component count to reduce heat and ensure efficient power delivery to thermally sensitive applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a compact power supply is used to reduce size, then the available space for heat dissipation is reduced, but heat output increases
Solution Approach 1:
The patent changes the operational parameters of the power supply by synchronizing switching operations with the AC voltage waveform zero-crossings. This parameter change allows the power supply to operate efficiently in a compact form factor while minimizing heat generation through optimal timing of power conversion operations.
Solution Approach 2:
The power supply employs periodic switching synchronized with the AC voltage waveform, operating at the lowest point of the waveform symmetrically around the zero crossing. This periodic action reduces RMS current and minimizes heat generation in the switching components, enabling compact design with adequate heat dissipation.
2Volume of moving object
If a low component count is used to reduce size, then reliability may be compromised, but heat output is reduced
Solution Approach 1:
The microcontroller performs multiple functions including waveform synchronization, switching control, and monitoring, replacing what would traditionally require separate dedicated circuits. This multi-functionality reduces component count while maintaining reliability through integrated control logic.
Solution Approach 2:
The system incorporates feedback mechanisms where the microcontroller monitors the AC voltage waveform and dynamically adjusts switching timing to maintain optimal operation. This feedback ensures reliable performance despite variations in input conditions, compensating for the reduced component count.
3Loss of energy
If dynamic control is implemented to maintain efficiency, then device complexity increases, but heat output is minimized
Solution Approach 1:
The patent replaces traditional mechanical or analog control mechanisms with microcontroller-based digital control. The microcontroller uses software algorithms to synchronize with the AC waveform and control switching, substituting complex hardware control circuits with a more compact and efficient digital implementation that maintains high efficiency.
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 solution provides a small, efficient, and economical power supply that maintains efficient operation with minimal heat output, suitable for compact electronic devices, ensuring reliable power delivery even during fluctuations or fault conditions.
Implementation Method 1
switching power supply for converting 120 Vac single phase 50/60 Hz line voltage (49-132 Vac range) to a nominal DC voltage
Data Source
AI summary
An AC to DC power supply for small heat sensitive electronic device. The power supply being dynamically controlled to operate symmetrically about the lowest point of the AC source voltage waveform for minimum excess heat production.