Integrated Power Supply System with DC Bus Voltage Control
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Solution Overview
Problem
Existing power supply systems in residential buildings and electric vehicles primarily provide AC power through wall sockets, failing to directly supply DC power, limiting the flexibility and convenience of electricity usage for both AC and DC loads.
Innovation Solution
An integrated power supply system incorporating a grid power source, renewable energy sources, a rechargeable battery assembly, a DC bus, bi-directional AC-to-DC and DC-to-DC converters, and a controller to stabilize and manage the DC bus voltage, enabling direct supply of both AC and DC electricity from wall sockets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only AC power is supplied through wall sockets, then the power supply system is simple, but the flexibility and convenience of electricity usage for DC loads is limited
Solution Approach 1:
The patent merges AC power supply and DC power supply into a single integrated wall socket system. The power supply unit includes both an AC output terminal and a DC output terminal, allowing both AC and DC electricity to be supplied through the same wall socket structure, thereby increasing versatility without proportionally increasing system complexity
Solution Approach 2:
The wall socket is designed with multi-functionality to serve both AC and DC power distribution. The power supply unit can selectively provide AC power to AC loads and DC power to DC loads through different output terminals, making the same wall socket infrastructure universal for different types of electrical loads
2Ease of operation
If DC power is added to wall sockets, then the convenience for DC loads increases, but the power supply system complexity increases
Solution Approach 1:
The power supply unit is segmented into distinct functional modules: an AC power input module, a DC power input module, a DC-DC conversion module, and output terminals for both AC and DC. This segmentation allows independent management of AC and DC power paths, simplifying the control architecture despite the added functionality
Solution Approach 2:
The patent introduces a DC bus as an intermediary element that receives DC power from both AC-to-DC conversion and direct DC input, and supplies it to the DC output terminal. This intermediary structure simplifies the power management by providing a common DC distribution point, reducing the overall system complexity
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
The system increases convenience and flexibility by providing stable DC and AC power, prioritizing renewable sources and battery backup to maintain voltage stability, ensuring reliable electricity supply and efficient energy utilization.
Implementation Method 1
a bi-directional AC-to-DC converter coupled to the grid power source and the DC bus
Implementation Method 2
a bi-directional DC-to-DC converter coupled to the rechargeable battery assembly and the DC bus
Implementation Method 3
a rechargeable battery assembly coupled to the DC bus through a bi-directional DC-to-DC converter
Implementation Method 4
The controller controls power electricity feeding into and being drawn from the DC bus, thereby keeping a bus voltage of the DC bus substantially fixed at a system voltage
Data Source
AI summary
An integrated power supply system includes a grid power source, at least one renewable power source, a rechargeable battery assembly, a DC bus, a bi-directional AC-to-DC converter, at least one first DC-to-DC converter, a bi-directional DC-to-DC converter, and a controller. The bi-directional AC-to-DC converter is coupled to the grid power source and the DC bus. The at least one first DC-to-DC converter is coupled to the at least one renewable power source and the DC bus. The bi-directional DC-to-DC converter is coupled to the rechargeable battery assembly and the DC bus. The controller controls power electricity feeding into and being drawn from the DC bus, thereby keeping a bus voltage of the DC bus substantially fixed at a system voltage.