Transformer Power Converter With Simultaneous Switch Operation
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Solution Overview
Problem
Current electrical power converters face limitations in achieving high efficiency and small size due to the alternating operation of power switches, which restricts the optimization of Figure of Merit (FOM) and requires additional circuitry for resonant reset, while also being unable to operate all power switches with a duty cycle greater than 50%, limiting the independent choice of duty cycles for input and output ports.
Innovation Solution
The implementation of a three-power-terminal power switch configuration where all power switches are operated simultaneously in either an On or Off state under a single logic control signal, eliminating the need for additional circuitry and allowing for a duty cycle higher than 50%, thereby reducing RMS current and improving the Figure of Merit, using a transformer or autotransformer for direct power transfer without AC power generation or storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power switches operate alternately in conventional topologies, then voltage regulation is achieved, but duty cycle is limited to ≤50% and additional circuitry is required
Solution Approach 1:
The patent inverts the conventional alternating switch operation by making both power switches operate simultaneously in the same state (both ON or both OFF). This inversion allows duty cycles greater than 50% while eliminating the need for additional reset circuitry, as the transformer magnetizing current naturally resets during the simultaneous OFF period.
Solution Approach 2:
The patent extracts and eliminates the need for additional reset circuitry and AC power generation components by redesigning the switch operation mode. The conventional requirement for separate inverting and rectifying switches is replaced by simultaneous operation of both switches, removing unnecessary circuit elements.
2Loss of energy
If conventional alternating switch operation is used, then power conversion is achieved, but Figure of Merit cannot be optimized
Solution Approach 1:
The patent implements continuous useful action by having both power switches operate simultaneously, allowing the transformer to continuously transfer power in the desired direction. This eliminates the alternating ON/OFF periods in conventional topologies, reducing switching losses and improving overall efficiency while optimizing the Figure of Merit.
3Productivity
If duty cycle is increased above 50%, then power transfer efficiency improves, but conventional topologies cannot support this operation
Solution Approach 1:
The patent introduces dynamics by allowing flexible duty cycle operation beyond the conventional 50% limit. The simultaneous switch operation mode enables adaptive duty cycle adjustment based on power transfer requirements, improving operational flexibility and efficiency for high-power applications.
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 enhances the efficiency and reduces switching losses by allowing simultaneous operation of all power switches, achieving a higher duty cycle and optimizing the Figure of Merit, while eliminating the need for extra circuitry and AC power handling, thus improving the performance of electrical power converters.
Implementation Method 1
a transformer or autotransformer to connect a primary port with a secondary port
Data Source
AI summary
A direct electrical power converter, DPX, that connects a primary port including a DC or AC energy source, with a secondary port including a DC or AC load, comprising a transformer or autotransformer; a first power switch between two nodes, having two power terminals and a first control terminal; and a second power switch between other different two nodes having two power terminals, and a second control terminal wherein said switches are configured to connect the primary port energy source to the secondary port load, through the transformer or autotransformer. The cited first and second power switches are configured to be operated simultaneously under the action of a logic control signal providing a conducting status with all 10 the power switches being simultaneously in an On state or with all the power switches simultaneously in an Off state, connecting or disconnecting said transformer to said primary port and said secondary ports simultaneously.