Power Supply Unit Switch Control for Reverse Voltage Protection
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Solution Overview
Problem
Existing power supply circuits fail to prevent breakdowns and load anomalies when output terminals of multiple units are erroneously connected, as they do not effectively manage voltage and current when input voltage is applied differently to each unit.
Innovation Solution
A unit with a power supply circuit, a switch, and a switch control part that turns off the switch when no input voltage is applied and turns it on when input voltage is applied, along with an optional second switch and notification system to detect and alert on voltage imbalances, preventing reverse voltage supply and anomalies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output terminals of multiple units are erroneously connected to each other, then voltage and current may be supplied abnormally to the power supply circuit, but the conventional power supply circuit cannot prevent breakdown or load anomaly
Solution Approach 1:
The switch control part performs preliminary detection of input voltage presence before allowing power supply operation. By detecting whether input voltage is applied and controlling the switch accordingly, the system prevents reverse voltage supply from erroneously connected units before it can cause damage to the power supply circuit or load.
2Reliability
If a switch is added to control power supply based on input voltage detection, then protection against erroneous connection is improved, but device complexity increases
Solution Approach 1:
The switch control part automatically detects the presence of input voltage and controls the switch without requiring external intervention or complex control systems. The power supply circuit protects itself by using its own input voltage detection capability to control the switch, eliminating the need for additional complex protection circuits or external control mechanisms.
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
Prevents power supply circuit breakdowns and load anomalies by ensuring safe operation even when units are incorrectly connected, while also providing an alarm system to notify operators of potential issues.
Implementation Method 1
a power supply circuit that converts an input voltage from an input power supply to a predetermined output voltage
Implementation Method 2
a switch control part configured to turn off the switch when the input voltage is not applied from the input power supply and turn on the switch when the input voltage is applied
Data Source
AI summary
A unit having a power supply circuit that converts an input voltage from an input power supply to a predetermined output voltage, includes: an output terminal configured to output the output voltage to the outside of the unit; a switch provided between the power supply circuit and the output terminal; and a switch control part configured to turn off the switch when the input voltage is not applied from the input power supply and turn on the switch when the input voltage is applied.