DC Voltage Supply Apparatus with OVP and UVP Protection
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Solution Overview
Problem
Server systems that operate directly on DC voltage face challenges in implementing over voltage protection (OVP) and under voltage protection (UVP) measures, as traditional power supplies are designed for AC voltage conversion, necessitating the development of a DC board with equivalent protection capabilities.
Innovation Solution
A DC voltage supply apparatus comprising a voltage detection unit, enable signal processing unit, latch unit, control unit, and voltage transforming unit that detects stable DC input voltage, processes enable signals, latches ineffective states, and controls voltage transformation to either provide or cut off DC output voltage based on stability, effectively preventing misoperation due to unstable power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a DC board is used to directly supply DC voltage to the server system, then the power supply structure is simplified and AC voltage conversion is eliminated, but the DC board lacks built-in protection measures against unstable DC voltage
Solution Approach 1:
The patent introduces an intermediary protection circuit between the DC input and the server system. This circuit includes voltage detection units that monitor DC input voltage, compare it with reference voltages, and control switching elements to disconnect the server system when voltage exceeds safe thresholds. This intermediary mechanism provides the missing protection capability without requiring a complex AC power supply structure.
Solution Approach 2:
The patent extracts the protection function from the traditional AC power supply and implements it as a separate, dedicated protection circuit on the DC board. By taking out the voltage detection and control functions into independent units with dedicated switching elements, the design achieves protection capability while maintaining the simplified DC direct-input structure.
2Reliability
If traditional AC-based power supplies with built-in protection measures are used, then over voltage and under voltage protection are ensured, but the system cannot directly accept DC voltage input from end clients
Solution Approach 1:
The patent designs a universal protection circuit that can handle DC voltage input while providing the same protection capabilities as traditional AC power supplies. The voltage detection units and switching elements are configured to work with DC input characteristics, enabling the system to accept DC voltage from end clients while maintaining over voltage and under voltage protection through the same fundamental mechanism.
3Reliability
If voltage protection measures are added to the DC board, then reliable protection against unstable DC voltage is achieved, but the device complexity increases
Solution Approach 1:
The patent segments the protection function into distinct modular units: voltage detection units that monitor specific voltage thresholds, comparison units that evaluate detected voltages against references, and switching elements that execute disconnection. This segmentation allows each unit to perform a specific function with simple circuitry, reducing overall complexity compared to a monolithic protection design.
Solution Approach 2:
The voltage detection units automatically monitor the DC input voltage and trigger protection actions when thresholds are exceeded, without requiring external control or complex processing. The circuit self-regulates by comparing voltages and controlling switching elements based on real-time conditions, providing protection through autonomous operation that minimizes additional 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
The apparatus effectively stops providing power to the server when the DC input voltage is unstable, thereby protecting the system from misoperation and ensuring stable operation by maintaining protection equivalent to traditional AC-based power supplies.
Implementation Method 1
a voltage detection unit, configured to receive and detect the DC input voltage to generate an input voltage state signal, wherein the input voltage state signal indicates a stable state of the DC input voltage
Implementation Method 2
when the control signal is effective, the voltage transforming unit receives the DC input voltage and transforms the DC input voltage into a DC output voltage for outputting
Data Source
AI summary
A DC voltage supply apparatus including a voltage detection unit, an enable signal processing unit, a latch unit, a control unit and a voltage transforming unit is provided. The voltage detection unit receives and detects a DC input voltage to generate an input voltage state signal. The enable signal processing unit receives the input voltage state signal and an enable signal, and determines a state of the enable signal according to the input voltage state signal. When the enable signal is ineffective, the latch unit latches the enable signal to keep an ineffective state. The control unit receives the enable signal, and generates a control signal. When the control signal is effective, the voltage transforming unit receives the DC input voltage and transforms the DC input voltage into a DC output voltage. When the control signal is ineffective, the voltage transforming unit stops receiving the DC input voltage.