Power Supply Transformer Segmentation for Lower Transistor Voltage
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Solution Overview
Problem
Existing power supply systems require high voltage transistors due to the high voltage across the primary winding of transformers, which increases component costs and complexity, and they often necessitate storage capacitors to reduce ripple in DC power supplies.
Innovation Solution
A power supply design that includes separate current generator and coupling circuits for each transformer, generating out-of-phase waveforms that are rectified and combined to produce a DC output with reduced ripple, allowing for lower voltage transistors and eliminating the need for storage capacitors by optimizing switching and control operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high voltage transistors are used to handle the high voltage across the primary winding of transformers, then the power supply can operate with conventional transformer connections, but the component cost and system complexity increase
Solution Approach 1:
The patent divides the single transformer primary winding into two separate primary windings, each connected to its own transistor. This segmentation allows each transistor to handle only a portion of the total voltage, reducing the voltage rating requirement for individual transistors while maintaining the overall power transformation function.
Solution Approach 2:
The patent introduces a second transformer operating in parallel with the first transformer. By distributing the power conversion load across two transformers with separate primary windings and transistors, the voltage burden on each transistor is reduced, effectively solving the high voltage requirement problem through dimensional expansion of the system architecture.
2Manufacturing precision
If storage capacitors are added to reduce ripple in DC power output, then the DC power quality improves, but the number of parts and power supply size increase
Solution Approach 1:
The patent employs two transformers operating with 90-degree phase-shifted waveforms that are rectified and combined. This periodic action with phase cancellation creates a ripple-free DC output naturally, eliminating the need for additional storage capacitors that would otherwise be required to filter ripple.
Solution Approach 2:
The patent combines the outputs of two rectified transformer windings with phase-shifted waveforms. This merging of outputs creates a composite waveform where the ripple components cancel each other out, achieving smooth DC power without requiring separate filtering capacitors.
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 reduces the voltage requirements for transistors, achieves high efficiency in DC-DC conversion, and provides a ripple-free DC output with minimal components, enabling smaller and less expensive power supply solutions.
Implementation Method 1
a first transformer and generates a first waveform, and a second transformer that is coupled to a second primary winding and generates a second waveform
Implementation Method 2
The first and second waveforms are rectified and combined into a DC output signal
Data Source
AI summary
A power supply that includes a first current generator circuit that is coupled to a first transformer and generates a first waveform and a second current generator circuit that is coupled to a second transformer, and generates a second waveform that is out of phase with the first waveform. The first and second waveforms are rectified and combined into a DC output signal. The power supply includes a first coupling circuit that couples the first current generator circuit to the first transformer and a second coupling circuit that couples the second current generator circuit to the second transformer.