Saturable Inductor Rectifier Filter Control for Reverse Current Protection
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Solution Overview
Problem
Existing rectifier filter control devices face issues with reverse current flow causing burnout of electronic switches, especially when the power operating cycle is small, leading to inefficiencies and reduced availability of electric energy.
Innovation Solution
Incorporating a saturable inductor, diode, and capacitor in the rectifier filter circuit to instantaneously switch electronic switches to an off state before reverse current flow occurs, utilizing a logic IC to control the switches and prevent burnout by generating a counter electromotive force and ensuring no signal is output when reverse current is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If electronic switches SW1 and SW2 are used in the rectifier filter circuit to reduce voltage difference and increase efficiency, then electric energy output efficiency is improved, but the electronic switches are vulnerable to reverse current flow and may burn out when power operating cycle is too small
Solution Approach 1:
The saturable inductor is configured to generate a counter electromotive force that instantaneously switches the electronic switches to off state before reverse current can flow back into the circuit. This preliminary protective action prevents the harmful reverse current from reaching the electronic switches, thereby maintaining their reliability while allowing them to operate efficiently during normal forward current conditions
2Productivity
If the power operating cycle is reduced to increase productivity, then output power is improved, but reverse current flow occurs more frequently causing electronic switches to burn out
Solution Approach 1:
The saturable inductor provides automatic feedback protection by generating a counter electromotive force in response to reverse current conditions. When reverse current attempts to flow, the saturable inductor detects this condition and automatically generates the protective counter electromotive force to switch off the electronic switches, creating a self-regulating protection mechanism that enables high-speed operation without compromising reliability
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 burnout of electronic switches and increases the availability factor of electric energy by effectively managing reverse current flow, reducing power consumption and enhancing efficiency.
Implementation Method 1
uses a saturable inductor, a diode and a capacitor connected to a rectifier filter circuit to cause electronic switches to instantaneously assume an off state prior to the rectifier filter circuit producing a reverse current flow
Implementation Method 2
uses a saturable inductor
Implementation Method 3
a diode 81
Data Source
AI summary
A rectifier filter control device for a power supply that includes:A saturable inductor (swing choke), capacitors; and rectifiers connected to a rectifier filter circuit. The rectifier filter circuit further includes two electronic switches, which are respectively connected to two terminals of each of the two rectifiers. Should a reverse current flow back into the rectifier filter circuit, then the two electronic switches assume off states at different time sequences, thereby preventing the reverse current flow from burning out the two electronic switches.