Power Supply Transient Response Control via Current Transformer
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Solution Overview
Problem
Conventional regulated power supply systems face challenges in quickly correcting voltage transients caused by load changes or unstable load conditions, particularly with negative impedance loads, leading to over-voltage conditions that can damage the system and its loads.
Innovation Solution
A power supply system comprising a current-controlled current source with an inductively coupled control circuit and a current transformer, where the primary coil is connected in series with the output circuit and the secondary coil is connected in series with the control circuit, allowing for proportional control of current to manage transient responses effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional regulated power supply system is used, then the system structure is simple, but the response time to transient load changes is slow causing over-voltage conditions
Solution Approach 1:
The patent implements a feedback mechanism where the control circuit continuously monitors the output voltage and adjusts the control current accordingly. When a voltage transient is detected, the control circuit responds by modifying the current through the current-controlled current source, creating a closed-loop system that automatically corrects deviations from the desired output voltage level.
Solution Approach 2:
The patent introduces a current-controlled current source as an intermediary component between the input voltage source and the load. This intermediary actively regulates the current delivered to the load based on control signals, providing enhanced transient response without requiring direct modification of the entire power supply architecture.
2Reliability
If negative impedance load is supplied with constant power, then the load receives stable power, but voltage oscillations occur causing unstable conditions
Solution Approach 1:
The control circuit employs feedback to detect voltage oscillations caused by negative impedance loads and automatically adjusts the control current to counteract these oscillations. The feedback loop monitors the output voltage and modifies the current through the current-controlled current source to maintain voltage stability even when supplying constant power to challenging loads.
Solution Approach 2:
The patent dynamically changes the electrical parameters (current and voltage) through the current-controlled current source in response to load conditions. By adjusting the control current based on real-time voltage measurements, the system adapts its parameters to maintain stability when supplying constant power to negative impedance loads.
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 provides a faster response time to transient changes, reducing the risk of over-voltage conditions and stabilizing the power supply system by ensuring that the output voltage returns to the desired level more quickly, thus preventing damage.
Implementation Method 1
a current transformer having a primary coil connected in series with the output circuit and a secondary connected in series with the control circuit
Implementation Method 2
the assembly having means for inductively coupling the primary and control windings such that current is in the primary is proportional to current in the control
Data Source
AI summary
A method and apparatus is provided to, among other things, supply power to a load under various load conditions. Output voltage transient responses of the system, such as may be caused by transients changes in the load conditions, may be controlled through current transformation on the output in order to correct or impede over-voltage conditions of the transient response.