Transformer Primary Winding Parallel Series Configuration
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Solution Overview
Problem
Existing power supply units for image forming apparatuses face challenges in efficiently managing both low-voltage and high-voltage systems using a single transformer, as the configuration of primary windings differs significantly between the two voltage systems, leading to increased component management and costs.
Innovation Solution
A power supply unit design that employs a transformer with a primary winding divided into two windings, where the windings are connected in parallel for low-voltage systems and in series for high-voltage systems, allowing for common use of transformer components across both voltage ranges, optimizing inductance and resistance for reduced energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate transformers are used for low-voltage and high-voltage systems, then each transformer can be optimized for its specific voltage, but component management complexity and costs increase
Solution Approach 1:
The transformer is designed with a primary winding divided into two independent windings that can be connected in different configurations (parallel for low-voltage, series for high-voltage), allowing a single transformer to serve both low-voltage and high-voltage systems. This multi-functional design eliminates the need for separate transformers, reducing component management complexity while maintaining voltage-specific optimization.
Solution Approach 2:
The transformer incorporates switching circuitry that dynamically reconfigures the primary winding connections based on the operating voltage. The controller detects the voltage level and switches between parallel connection (low-voltage mode) and series connection (high-voltage mode), enabling the transformer to adapt its characteristics to match the required voltage system.
2Adaptability or versatility
If the primary winding is divided into two windings for reconfigurable connections, then adaptability to different voltage systems is improved, but the winding structure becomes more complex
Solution Approach 1:
The divided primary windings enable the transformer to universally support both low-voltage and high-voltage systems. By connecting the two windings in parallel, the transformer operates in low-voltage mode; by connecting them in series, it operates in high-voltage mode. This multi-functional winding structure achieves voltage system compatibility while managing structural complexity through systematic design.
3Power
If windings are connected in parallel for low-voltage systems, then current flow is doubled and resistance is halved, but the winding configuration becomes more complex
Solution Approach 1:
The transformer dynamically configures the winding connections based on the operating voltage requirements. In low-voltage systems, the controller connects the primary windings in parallel to double the current flow capacity and halve the resistance, optimizing power delivery. The dynamic switching capability achieves current efficiency while managing configuration complexity through automated control.
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 configuration enables the use of a single transformer for both low-voltage and high-voltage systems, reducing component management and costs while maintaining efficient power supply, with the low-voltage system achieving twice the current flow and half the resistance of the high-voltage system, resulting in balanced energy loss.
Implementation Method 1
The primary winding receives an alternating current in such a manner that an alternating current is induced in the secondary winding
Data Source
AI summary
A power supply unit includes primary and secondary circuits and a transformer. The primary circuit is connected to an alternating-current power supply and includes a switching device. The transformer includes primary and secondary windings. The primary winding receives an alternating current so that an alternating current is induced in the secondary winding. The received alternating current is generated through switching using the switching device. The secondary circuit rectifies, for output, the alternating current induced in the secondary winding. The primary winding includes first and second windings. When the alternating-current power supply is a power supply of a first voltage, the first winding is connected to the second winding in parallel in the primary winding. When the alternating-current power supply is a power supply of a second voltage higher than the first voltage, the first winding is connected to the second winding in series in the primary winding.