Transformer Winding Layout for Stable Multi-Output Voltage
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Solution Overview
Problem
Transformers with multiple secondary windings connected to different loads face issues with unintended voltage fluctuations due to leakage inductance, requiring complex voltage adjustment circuits and controllers to maintain consistent output voltages.
Innovation Solution
A transformer design where the primary winding, feedback winding, and non-feedback windings have equal winding widths and end positions in the axial direction of the bobbin, improving magnetic coupling and reducing leakage inductance, allowing intended voltages to be output to each load without a voltage adjustment circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a voltage adjustment circuit (regulator) is used to maintain constant output voltage, then the output voltage stability is improved, but the device complexity and component count increase
Solution Approach 1:
The invention extracts and eliminates the voltage adjustment circuit (regulator) from the system by optimizing the transformer's magnetic coupling structure. Through equalizing winding widths and positions, the transformer inherently provides stable voltage output without requiring external regulation circuits, thus removing the complexity while maintaining reliability
Solution Approach 2:
The transformer structure is designed to self-regulate voltage output through its geometric configuration. By making the primary and secondary windings have equal widths and positions, the magnetic coupling is optimized to naturally compensate for voltage fluctuations, enabling the system to maintain stable output without external control or adjustment circuits
2Ease of manufacture
If different winding widths are used for primary and secondary windings, then the manufacturing flexibility is improved, but the magnetic coupling efficiency deteriorates
Solution Approach 1:
The invention applies homogeneity by making the primary and secondary windings have equal widths and positions along the bobbin. This uniform geometric configuration maximizes the overlapping magnetic field area between windings, thereby optimizing magnetic coupling efficiency while still allowing different number of turns and voltage ratios
3Reliability
If leakage inductance is reduced through optimized winding configuration, then the output voltage stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The invention changes the geometric parameters of the windings by setting equal widths and positions for primary and secondary windings. This parameter optimization reduces leakage inductance and improves voltage stability. The design uses standard manufacturing tolerances to achieve this configuration, balancing precision requirements with manufacturing feasibility
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 design effectively decreases the variability of output voltages in secondary windings, enabling consistent voltage delivery to loads without the need for additional voltage adjustment circuits, simplifying the circuit configuration and reducing component count.
Implementation Method 1
a primary winding P and a plurality of secondary windings S that generate voltages different from a voltage applied to the primary winding P
Implementation Method 2
a feedback winding S10 to feed back an output voltage of the feedback winding S10 to a feedback circuit 26 that performs feedback from a secondary winding side to a primary winding side
Data Source
AI summary
A transformer includes a primary winding, a feedback winding, and a non-feedback winding having substantially equal winding widths in an axial direction of a bobbin.