DC-Coupled Power Architecture Without Intermediate DC/DC Converters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DC coupling power systems require multiple DC/DC converters, leading to increased system complexity, cost, space requirements, and energy loss due to power conversion.
Innovation Solution
A DC coupling power system that omits DC/DC converters, utilizing an AC/DC converter to convert AC power to DC power directly for battery modules and DC coupled chargers, with a control unit to manage operation modes based on load and energy levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DC/DC converters are installed in the DC coupling power system, then the power conversion function is improved, but the system complexity increases
Solution Approach 1:
The patent extracts and removes the DC/DC converter component from the DC coupling power system. By taking out this intermediate power conversion device, the system simplifies the power transmission path while maintaining the essential function of providing DC power to battery modules and DC coupled chargers, thus resolving the contradiction between power conversion capability and system complexity
Solution Approach 2:
The patent merges the power conversion function directly at the AC/DC stage, where the AC/DC converter provides both AC to DC conversion and directly supplies power to DC coupled devices. This consolidation eliminates the need for separate DC/DC converters, reducing system complexity while preserving power conversion functionality
2Adaptability or versatility
If DC/DC converters are installed in the DC coupling power system, then the power conversion capability is improved, but the energy loss increases
Solution Approach 1:
By extracting and removing the DC/DC converter from the system, the patent eliminates the additional energy loss that would occur during intermediate DC to DC power conversion. The system now uses a direct power transmission path from AC/DC converter to DC coupled devices, reducing total energy loss while maintaining power conversion capability
Solution Approach 2:
The patent establishes a continuous power transmission path from the AC/DC converter directly to DC coupled devices without intermediate conversion steps. This continuous action minimizes energy loss by eliminating repeated power conversion cycles, while the AC/DC converter maintains the necessary power conversion capability
3Adaptability or versatility
If DC/DC converters are installed in the DC coupling power system, then the power conversion function is improved, but the operation power consumption increases
Solution Approach 1:
The patent extracts and removes the DC/DC converter component, eliminating its operational power consumption from the system. This reduction in active components directly decreases the total operation power consumption while the AC/DC converter continues to provide the necessary power conversion function
4Adaptability or versatility
If DC/DC converters are installed in the DC coupling power system, then the power conversion capability is improved, but the system cost increases
Solution Approach 1:
By extracting and removing the DC/DC converter from the system architecture, the patent eliminates the associated equipment costs, installation costs, and maintenance costs. This cost reduction is achieved while the AC/DC converter maintains the essential power conversion capability needed for the DC coupling power system
5Adaptability or versatility
If DC/DC converters are installed in the DC coupling power system, then the power conversion function is improved, but the equipment installation space increases
Solution Approach 1:
The patent extracts and removes the DC/DC converter equipment from the system, thereby eliminating the physical space that would be required for installing these additional power conversion devices. This space reduction is achieved while the AC/DC converter continues to provide the necessary power conversion function
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
Saves operation power, simplifies system control logic, reduces energy loss, and decreases system costs and space requirements by eliminating DC/DC converters.
Implementation Method 1
an AC/DC converter, which converts the AC voltage into a DC voltage
Data Source
AI summary
A DC coupling power system receives an AC voltage from an AC power source and includes an AC/DC converter, a battery module, a DC coupled charger and a control unit. The AC/DC converter is configured to convert the AC voltage into a first DC voltage, and provide the first DC voltage and a supply power to a DC bus. The battery module is directly connected to the DC bus. The DC coupled charger receives the first DC voltage and provides a load power to charge a load. The control unit is configured to determine an energy of the battery module and compare the load power and a contracted demand capacity to set the AC/DC converter in one of a plurality of modes.