Power Supply Control Device for Simultaneous Voltage Reduction
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Solution Overview
Problem
Existing power supply control systems struggle to simultaneously lower voltages across multiple loads while maintaining the voltage ratio constant, especially during power shortages or abnormalities, leading to potential damage from uneven voltage drops.
Innovation Solution
A power supply control device with synchronous rectification type DC-DC converters, reference voltage circuits, common reference voltage circuits, comparison circuits, switching circuits, and controllers that allow for simultaneous voltage lowering across loads by switching between reference and common reference voltages, ensuring the voltage ratio remains unchanged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate power supply circuits are provided for each load to allow individual voltage control, then individual load control is achieved, but device complexity increases
Solution Approach 1:
The power supply system is divided into multiple independent DC-DC converter units, each with its own control circuit and reference voltage input. Each converter can independently regulate voltage for its associated load, enabling individual control while maintaining modular simplicity
Solution Approach 2:
The control device is designed to handle multiple operating modes through a universal control architecture that can switch between independent voltage regulation for each load and coordinated voltage reduction across all loads, making the system adaptable to different power supply scenarios
2Reliability
If voltage is lowered simultaneously across all loads during power shortage, then load damage is suppressed, but maintaining constant voltage ratio becomes difficult
Solution Approach 1:
The control device incorporates feedback mechanisms that continuously monitor the voltage output of each DC-DC converter and adjust the control signals accordingly. This feedback control ensures that the voltage ratios between multiple loads are maintained at their original values even during simultaneous voltage reduction, achieving precise voltage ratio control while protecting loads
Solution Approach 2:
The system dynamically changes the reference voltage parameters for each DC-DC converter in a coordinated manner. By adjusting the reference voltages proportionally and simultaneously across all converters, the system maintains constant voltage ratios while achieving the desired voltage reduction level for load protection
3Speed
If reference voltage is switched to common reference voltage for simultaneous voltage lowering, then simultaneous voltage control is achieved, but voltage ratio may change
Solution Approach 1:
Before switching to common reference voltage mode, the control device pre-calculates and pre-adjusts the reference voltage values to ensure that when the switch occurs, all DC-DC converters will maintain their original voltage ratios. This preliminary action prevents voltage ratio deviations during the transition to simultaneous voltage control
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
Enables individual control of power supply to each load, ensuring simultaneous voltage drops across all loads during power shortages or abnormalities, thereby preventing damage by maintaining the voltage ratio, thus ensuring stable operation.
Implementation Method 1
a synchronous rectification type DC-DC converter provided for each of the loads and configured to regulate a voltage of electricity input from a power source and supply the voltage to the load
Implementation Method 2
a comparison circuit provided for each of the DC-DC converters and configured to receive an input of a feedback voltage, which is a fraction of the output voltage from the DC-DC converter, and an input of the reference voltage or the common reference voltage and output a signal that corresponds to a difference between the feedback voltage and the reference voltage or the common reference voltage
Data Source
AI summary
A power supply control device for supplying electricity to a plurality of loads includes: a plurality of synchronous rectification type DC-DC converters, each regulating and supplying the power source to the load; a plurality of reference voltage circuits, each outputting a reference voltage; a common reference voltage circuit outputting a common reference voltage; a plurality of comparison circuits, each outputting a signal that corresponds to the difference between a feedback voltage, which is a fraction of the output voltage from the DC-DC converter, and the reference voltage or the common reference voltage; and a common reference voltage circuit controller controlling the common reference voltage circuit so that the common reference voltage falls when the input to the comparison circuit is switched from the reference voltage to the common reference voltage.