Voltage Converting Device Input Voltage Detection Control
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Solution Overview
Problem
Existing voltage converting devices, such as DC/DC converters, often supply voltages higher than the normal working voltage to loads, leading to concerns about electrical safety and efficiency, particularly when high voltages are input and low currents are output.
Innovation Solution
A voltage converting device that includes a DC/DC converter and a control device, which determines whether the input voltage is within a predetermined range and switches between step-down operation and bypassing the step-down operation based on voltage and current conditions, ensuring that the load receives a safe voltage from either the DC/DC converter or a low-voltage power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the DC/DC converter performs step-down operation when high voltage is input, then voltage conversion is achieved, but voltage higher than normal working voltage may be supplied to the load
Solution Approach 1:
The determining unit performs preliminary detection of the input voltage before the DC/DC converter executes the step-down operation. By detecting whether the input voltage is within the predetermined voltage range in advance, the system can prevent excessive voltage from being supplied to the load, thereby resolving the contradiction between voltage safety and control complexity.
Solution Approach 2:
The control device uses feedback from the determining unit about the input voltage status to adjust the operation of the DC/DC converter. When the input voltage is detected to be outside the safe range, the control device stops the step-down operation, creating a feedback loop that ensures voltage safety while maintaining simple control logic.
2Reliability
If the DC/DC converter stops step-down operation, then voltage safety is improved, but power supply efficiency decreases
Solution Approach 1:
The system dynamically adjusts the operation mode of the DC/DC converter based on real-time input voltage conditions. When the input voltage is within the safe range, the step-down operation continues for efficient power supply. When the voltage exceeds the safe range, the operation is stopped to prevent damage. This dynamic adjustment resolves the contradiction between voltage safety and power supply 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 effectively minimizes the risk of supplying excessive voltage to loads, ensuring safe operation and efficient power delivery by controlling the step-down operation of the DC/DC converter based on input voltage and load conditions, thereby preventing voltage higher than the normal working voltage from being supplied.
Implementation Method 1
a DC/DC converter (11) configured to step down a voltage of a power supply (HB) and output the stepped-down voltage to a low-voltage power supply (LB)
Data Source
AI summary
A voltage converting device includes: a DC/DC converter configured to step down a voltage of a power supply and output the stepped-down voltage to a low-voltage power supply having a voltage lower than a voltage of the power supply; a control device configured to control the DC/DC converter; and a determining unit configured to determine whether a voltage of the power supply input to the DC/DC converter is within a predetermined voltage range, wherein the control device switches, on the basis of a determination result of the determining unit, between a first control in which the DC/DC converter is caused to perform a step-down operation and electric power is supplied to a load connected to the low-voltage power supply and a second control in which a step-down operation of the DC/DC converter stops and electric power is supplied from the low-voltage power supply to the load.