Bidirectional Power Converter for Supplemental AC Output Control
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Solution Overview
Problem
Modular electronic devices face challenges in efficiently converting power between different types of devices, such as batteries and chargers, due to the need for flexible and customizable power transfer capabilities.
Innovation Solution
A bidirectional power converter system is introduced, comprising an AC/DC active front end drive circuit and a bidirectional DC/DC converter, controlled by an electronic processor, to manage power flow and conversion between AC and DC sources and loads, including power factor correction and solar boost capabilities, enabling seamless power exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bidirectional power converter system is used to enable flexible power transfer between different devices, then adaptability and versatility are improved, but device complexity increases
Solution Approach 1:
The power converter system is designed with bidirectional AC/DC and DC/DC conversion capabilities in a single integrated unit. The system can function as both an AC/DC converter and a DC/DC converter, allowing it to adapt to different power sources (AC mains, DC batteries) and different power demands, thereby achieving multi-functionality and resolving the contradiction between versatility and complexity.
Solution Approach 2:
The system incorporates an electronic processor that dynamically determines the operating mode based on real-time conditions. The processor selects between AC input mode, DC input mode, AC output mode, and DC output mode depending on the connected devices and power requirements. This dynamic adaptability allows the system to be versatile without requiring multiple fixed-configuration devices, thus managing complexity while improving adaptability.
2Adaptability or versatility
If power conversion is performed between AC and DC sources to support multiple device types, then adaptability is improved, but energy loss increases
Solution Approach 1:
The electronic processor dynamically selects the optimal power conversion path based on the specific devices connected and their power requirements. When AC power is available and sufficient, the system uses AC input mode; when battery power is available or when DC devices are connected, it switches to DC input mode. This dynamic selection minimizes unnecessary AC/DC conversion cycles, thereby reducing energy losses while maintaining device compatibility.
3Productivity
If the system monitors and manages power flow between multiple interfaces to optimize power usage, then productivity is improved, but device complexity increases
Solution Approach 1:
The electronic processor continuously monitors the state of connected devices, available power at different interfaces, and power flow conditions. Based on this feedback, the processor automatically adjusts the conversion mode, selects appropriate input/output interfaces, and optimizes power distribution. This feedback mechanism enables intelligent power management that improves productivity without requiring complex manual intervention, as the system self-regulates based on real-time conditions.
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 ensures efficient power conversion and management, allowing modular devices to function optimally by adapting to varying power demands and sources, supporting multiple interfaces and battery types, and facilitating simultaneous or sequential charging/discharging.
Implementation Method 1
The bidirectional AC/DC active front end (AFE) drive circuit is electrically connected between the AC input interface, the AC output interface, and the DC bus and is configured to convert AC power from the AC input interface to DC power at the DC bus and convert DC power from the DC bus to provide AC power at the AC output interface
Implementation Method 2
The bidirectional DC/DC converter is electrically connected between the DC bus and the battery interface and is configured to convert DC power received from a battery electrically connected to the battery interface to DC power at the DC bus and convert DC power from the DC bus to charge the battery
Data Source
AI summary
Electronic devices and methods of controlling the same. One method of controlling an electronic device including an AC input interface, an AC output interface, a DC bus, a battery interface, a bidirectional AC/DC active front end (AFE) drive circuit, a bidirectional DC/DC converter, and an electronic processor includes determining a difference between a power level available from the AC input interface and a power demand at the AC output interface, and, in response to the power demand at the AC output interface being greater than or equal to the available power level, (i) controlling an output switch between the AFE drive circuit and the AC output interface to a closed state and (ii) controlling the AFE drive circuit and the bidirectional DC/DC converter to provide supplemental AC output power at the AC output interface using stored energy from a battery electrically connected to the battery interface.