Vehicle Power Supply Switching for AC Phase Compatibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Alternating current power from a grid power supply and a vehicle have different phases, making it undesirable to supply them simultaneously to power loads, and existing systems are complex.
Innovation Solution
A power supply system with a simple configuration using electromagnetic switches and a power converter to selectively supply power from a vehicle to power loads, managed by a controller to ensure phase compatibility and efficient energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If alternating current power from grid power supply and vehicle are supplied simultaneously to power load, then power supply capacity is increased, but phase difference causes harmful effects and system complexity increases
Solution Approach 1:
The system dynamically switches between grid power supply and vehicle power supply based on real-time conditions. The switching mechanism allows the power source to change from static to dynamic, selecting the appropriate source (grid or vehicle) to avoid phase difference issues while maintaining adequate power supply capacity.
Solution Approach 2:
The control device acts as an intermediary between the grid power supply, vehicle power supply, and power load. It manages the switching and coordination between different power sources, preventing direct simultaneous connection that would cause phase difference harmful effects while ensuring smooth power transition.
2Object-generated harmful factors
If complex switching mechanisms are added to prevent phase difference issues, then harmful factors are reduced, but device complexity increases
Solution Approach 1:
The control device performs multiple functions: it monitors power supply status, detects phase differences, controls switching between power sources, and manages the power converter. By consolidating these functions into a single multi-functional control device, the system reduces overall complexity compared to having separate dedicated components for each function.
Solution Approach 2:
The control device merges the switching control function with the power management function. Instead of having separate switching mechanisms and control systems, the patent combines them into an integrated control device that manages both the switching operations and the power conversion processes, thereby reducing device complexity.
3Device complexity
If vehicle power supply is implemented with simple system configuration, then device complexity is reduced, but control precision over power supply switching may be insufficient
Solution Approach 1:
The control device incorporates feedback mechanisms to monitor the status of power supply switching and adjust control actions accordingly. By continuously detecting the actual power supply state and comparing it with the desired state, the control device can precisely manage the switching process between grid and vehicle power sources, maintaining high control precision with a relatively simple system configuration.
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
Enables power supply from a vehicle to power loads with a straightforward system design, optimizing energy usage and reducing the risk of exceeding vehicle discharge capacity.
Implementation Method 1
a power converter configured to supply alternating current power from the vehicle to the power load when the vehicle is connected to the power converter
Implementation Method 2
The first switch is configured to switch between electrically connecting and disconnecting the current breaker to and from the load breaker. The second switch is configured to switch between electrically connecting and disconnecting the first switch to and from the power converter
Data Source
AI summary
In a power supply system, a power supply device supplies alternating current power from a vehicle to a load when the vehicle is connected to the power supply device. A first electromagnetic switch can switch between electrically connecting and disconnecting an earth leakage breaker to and from an overcurrent breaker. A second electromagnetic switch can switch between electrically connecting and disconnecting the first electromagnetic switch to and from the power supply device, and can switch between electrically connecting and disconnecting the overcurrent breaker to and from the power supply device. An ammeter measures a current value between the overcurrent breaker and the load. The power supply system closes the first electromagnetic switch and opens the second electromagnetic switch when the vehicle is connected to the power supply device and a measured value from the ammeter is greater than a threshold β.