Power Supply Voltage Drop Adjustment for Loss Reduction
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Solution Overview
Problem
Existing power supply technologies fail to ensure that high-efficiency power is used in place of low-efficiency power, resulting in inefficient power allocation and increased losses.
Innovation Solution
A power supply system comprising a first power conversion module, a second power conversion module, a changeover switch, and a control module, where the control module manages the changeover switch to replace backup power from the second module with working power from the first module, adjusting voltage levels to minimize losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a diode is used as the switch element to allocate power from high-efficiency modules, then power allocation capability is provided, but the voltage difference requirement (0.7V forward-bias) prevents effective replacement of low-efficiency power with high-efficiency power when voltages are equal
Solution Approach 1:
The patent introduces a voltage drop adjustment unit that actively modifies the voltage parameter of the backup power output from the second power conversion module. By dynamically adjusting the voltage level, the system ensures that the high-efficiency module's output can effectively replace the low-efficiency module's output even when their nominal voltages are equal, thus resolving the diode's voltage difference limitation while minimizing energy loss
Solution Approach 2:
The voltage drop adjustment unit acts as an intermediary between the second power conversion module and the load. It introduces a controlled voltage drop to create the necessary voltage difference that enables the diode switch element to function properly, allowing power allocation from high-efficiency modules without requiring the original modules to have inherently different voltage levels
2Reliability
If the second power conversion module continues to output backup power when replaced by the first module, then power supply continuity is maintained, but power conversion efficiency deteriorates due to continued operation of the low-efficiency module
Solution Approach 1:
The control module performs preliminary action by detecting when the first power conversion module is enabled and proactively adjusting the voltage drop of the second module's backup power output. This preliminary adjustment prevents the second module from continuing to supply significant power, thereby eliminating unnecessary energy loss while maintaining system reliability through the first module's takeover
Solution Approach 2:
The system implements feedback control where the control module monitors the operational state of both power conversion modules and dynamically adjusts the voltage drop adjustment unit accordingly. When the first module is enabled, the feedback signal triggers the voltage adjustment to minimize the second module's output, creating a closed-loop control system that continuously optimizes power conversion 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
This solution ensures that high-efficiency power is used, reducing overall power supply losses by effectively replacing backup power with working power, thereby enhancing efficiency.
Implementation Method 1
the external power is converted into at least one working power
Implementation Method 2
the external power is converted permanently and then provided as a backup power
Implementation Method 3
the backup power outputted from the second power conversion module is dropped
Data Source
AI summary
A power supply includes a first and second power conversion modules, changeover switch and control module. The first power conversion module provides at least one working power and generate a power good signal. The power conversion efficiency of the second power conversion module is lower than that of the first power conversion module. The second power conversion module provides a backup power permanently. The control module includes a switch control unit connected to the changeover switch, and a voltage drop adjustment unit connected to the second power conversion module. The control module is provided with a first state, in which the power good signal is not received such that the backup power is outputted continuously, and a second state, in which the changeover switch is turned on while the backup power is dropped to be replaced by the working power from the changeover switch on receiving the power good signal.