Vehicle Inverter External Power Supply via Switch Block
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Solution Overview
Problem
Current vehicle power generation systems require additional power electronic components to supply high-capacity AC power externally, leading to increased costs and limitations in power output, particularly for electric vehicles, which can only provide single-phase output and pose safety risks during vehicle movement.
Innovation Solution
A movable power generating system for vehicles that includes an inverter to convert battery power to AC, a motor to receive AC power, and a switch block to branch the power for external supply, with a vehicle controller managing operation modes to switch between traveling and external power supply, allowing for high-capacity power output without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a separate step-up converter and power converting device are added to supply AC power externally, then high capacity power can be supplied, but the cost greatly increases
Solution Approach 1:
The inverter originally designed for motor control is made to serve dual purposes: driving the motor during vehicle operation and supplying AC power externally when needed. The switch block enables the inverter to selectively connect between the motor and external power supply, allowing one device to fulfill multiple functions without requiring separate dedicated power conversion equipment.
Solution Approach 2:
The patent combines the motor control inverter with the external power supply function by using a common inverter unit. Instead of having separate inverters for motor control and external power supply, the system merges these functions into a single inverter controlled by a switch block that routes power accordingly.
2Device complexity
If only single-phase output is used for external power supply, then the system is simple, but only small capacity power can be supplied to the grid
Solution Approach 1:
The system changes the electrical output parameters from single-phase to three-phase by utilizing the three-phase inverter's full capability. When supplying external power, the inverter operates in three-phase mode rather than being limited to single-phase output, thereby increasing the power supply capacity while using the same hardware infrastructure.
3Ease of operation
If the vehicle moves while supplying power to the outside, then mobility is maintained, but safety risk increases due to electrical connection with motor
Solution Approach 1:
The switch block dynamically changes the electrical connection configuration based on the operating mode. During external power supply, the switch block disconnects the inverter output from the motor and connects it to the external power supply terminal. This dynamic switching ensures that no electrical connection exists between the power supply system and motor during external power delivery, eliminating safety risks while maintaining mobility.
Solution Approach 2:
The motor is extracted from the power supply circuit during external power delivery mode. The switch block removes the motor connection from the inverter output path and connects only the external power supply terminal, ensuring complete electrical isolation between the motor and external power supply system during operation.
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 the vehicle to supply high-capacity power externally without additional power electronic parts, ensuring vehicle stability and operating as a movable power generator from various energy sources, including batteries, internal combustion engines, and fuel cells, while allowing power supply during movement.
Implementation Method 1
an inverter for receiving power from a battery in a vehicle to generate alternating current (AC) power
Implementation Method 2
a switch block connected to the output terminal of the inverter and for branching the AC power
Data Source
AI summary
A movable power generating system for a vehicle may include an inverter for receiving power from a battery in a vehicle to generate AC power, a motor for receiving the AC power from the inverter, a switch block connected to the output terminal of the inverter and for branching the AC power, and an external power supply unit connected to the switch block and for outputting the AC power.