Transformer Power Conversion Circuit for Wide Input Voltage Stability
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Solution Overview
Problem
The existing power supply conversion circuits have a limited effective voltage range due to the limitations of capacitors in raising the primary transformer coil voltage, leading to unstable operation of transformers.
Innovation Solution
A power supply conversion circuit incorporating a DC conversion circuit, pulse width control circuit, and transformer with primary and secondary coils, where the DC conversion circuit adjusts the initial voltage to a target voltage, and the pulse width control circuit generates a pulse square wave to induce an electromagnetic field, allowing the secondary coil to generate an output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a capacitor is used on the primary side to raise the minimum voltage of the primary transformer coil, then the operation dead zone of the transformer is reduced or eliminated, but the magnitude of voltage raised is limited, resulting in a small effective voltage range
Solution Approach 1:
The voltage adjustment function is segmented into two independent stages: first, a capacitor raises the minimum voltage of the primary transformer coil to eliminate the operation dead zone; second, a DC conversion circuit adjusts the voltage magnitude to expand the effective voltage range. This segmentation allows each component to specialize in one function, resolving the contradiction between stability and adaptability.
Solution Approach 2:
A DC conversion circuit is introduced as an intermediary component between the capacitor and the primary transformer coil. This intermediary takes the voltage output from the capacitor and adjusts it to the required magnitude, enabling the system to handle a wider voltage range while maintaining stable transformer operation.
2Reliability
If the input voltage is within a limited range, then the capacitor can effectively raise the voltage to eliminate the operation dead zone, but the power supply conversion circuit cannot handle voltages outside this range
Solution Approach 1:
The system transitions from a static voltage adjustment approach (fixed capacitor value) to a dynamic approach where the DC conversion circuit can adaptively adjust the voltage magnitude based on the input voltage level. This dynamic adjustment capability allows the system to maintain reliable transformer operation across a wide range of input voltages.
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
The solution expands the effective voltage range and improves output stability by ensuring the transformer operates stably at the target voltage, enhancing the transformer's operational stability and efficiency.
Implementation Method 1
The primary transformer coil is configured to induce an electromagnetic field based on the pulse square wave and to couple the electromagnetic field to the secondary transformer coil
Implementation Method 2
The secondary transformer coil is configured to generate an induced current based on the electromagnetic field and to generate an output voltage based on the induced current
Data Source
AI summary
Disclosed in the embodiments of the present application is a power conversion circuit, comprising a direct current conversion circuit, a pulse width control circuit, and a transformer. The transformer comprises a primary transformer coil and a secondary transformer coil. The direct current conversion circuit is connected to the primary transformer coil, and is used for adjusting an initial voltage inputted to the direct current conversion circuit to a target voltage. The pulse width control circuit is connected to the primary transformer coil, and is used for generating a pulse square wave on the basis of the target voltage. The primary transformer coil is coupled with the secondary transformer coil. The primary transformer coil is used for generating an electromagnetic filed according to the pulse square wave, and coupling the electromagnetic field to the secondary transformer coil so that the secondary transformer coil generates an output voltage.