Efficient Bidirectional DCDC Converter Design with Reduced Costs
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Summary
Problems
High-power bidirectional converters for charging piles require complex transformer structures, leading to increased manufacturing costs and difficulties in realization.
Innovation solutions
A bidirectional isolated DCDC converter with multiple DCDC conversion modules connected in parallel, each comprising a resonant circuit and a non-isolated buck/boost circuit, controlled to achieve current sharing among the non-isolated buck/boost circuits, reducing the need for complex transformer structures and lowering manufacturing costs.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If multiple transformer windings are connected in series to increase power, then the power of the bidirectional converter is improved, but the device complexity and manufacturing cost increase
Why choose this principle:
The patent divides the high-power bidirectional converter into multiple modular DCDC conversion modules, each with its own isolated DCDC unit. Instead of using a single complex transformer with multiple series windings, the system segments the power conversion function across multiple independent modules operating in parallel, thereby achieving high power while maintaining structural simplicity
Principle concept:
If multiple transformer windings are connected in series to increase power, then the power of the bidirectional converter is improved, but the device complexity and manufacturing cost increase
Why choose this principle:
The patent combines multiple DCDC conversion modules in parallel to achieve the desired power level. Each module contains a resonant circuit and a non-isolated buck/boost circuit that work together to provide isolated bidirectional power conversion. This merging of simpler modules achieves the same power capability as complex series windings but with reduced manufacturing complexity
Application Domain
Data Source
AI summary:
A bidirectional isolated DCDC converter with multiple DCDC conversion modules connected in parallel, each comprising a resonant circuit and a non-isolated buck/boost circuit, controlled to achieve current sharing among the non-isolated buck/boost circuits, reducing the need for complex transformer structures and lowering manufacturing costs.
Abstract
The present disclosure provides a Direct Current to Direct Current (DCDC) converter and a control method thereof. The Direct Current to Direct Current (DCDC) converter comprises: at least one DCDC conversion module and a controller, wherein each of the DCDC conversion modules comprises two bidirectional isolated DCDC units connected in parallel, each of the bidirectional isolated DCDC units comprises a resonant circuit and a non-isolated buck/boost circuit connected in cascade; if the number of the DCDC conversion modules is greater than or equal to 2, the DCDC conversion modules are connected in parallel; the controller is connected to each of the bidirectional isolated DCDC units, and control current sharing among the non-isolated buck/boost circuits. The Direct Current to Direct Current (DCDC) converter and the control method thereof according to the embodiments of the present disclosure reduce the manufacturing cost of the Direct Current to Direct Current (DCDC) converter.