Vehicle Power Source Motor Generator Abnormality Detection
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Solution Overview
Problem
Current vehicle power sources face challenges in reducing costs while enhancing power generation and output performance of motor generators, which are essential for efficient energy recovery and utilization during vehicle deceleration and acceleration.
Innovation Solution
A vehicle power source system that includes a motor generator, power storage, switches, an abnormality detector, and a switch controller, allowing for controlled coupling and decoupling of the motor generator with lithium ion and lead batteries to optimize energy efficiency and reduce costs by managing charge and discharge states and detecting abnormalities to prevent excessive power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the motor generator's power generation performance and output performance are enhanced, then energy efficiency is improved, but the cost of the vehicle power source increases
Solution Approach 1:
The patent segments the abnormality detection function from the motor generator control system by introducing a separate abnormality detector that monitors motor generator output. This separate detection mechanism allows for cost-effective monitoring without requiring expensive integrated control systems, thus resolving the contradiction between enhanced performance monitoring and cost reduction.
Solution Approach 2:
The patent introduces a switch as an intermediary component between the motor generator and power storage device. This switch enables controlled connection and disconnection, allowing the system to manage energy flow efficiently while protecting against abnormal conditions. The intermediary switch provides a simple, cost-effective solution for managing the interaction between enhanced performance components and the power storage system.
2Loss of energy
If the motor generator is continuously coupled to the power storage to maximize energy recovery, then energy efficiency is improved, but the risk of abnormality damage increases
Solution Approach 1:
The patent implements a feedback mechanism where the abnormality detector continuously monitors the motor generator's output and provides feedback to the switch controller. When abnormalities are detected, the system automatically disconnects the motor generator from the power storage device through the switch. This feedback loop enables the system to maintain continuous coupling for energy recovery while providing automatic protection against abnormal conditions.
Solution Approach 2:
The patent prepares protective measures in advance by continuously monitoring motor generator output through the abnormality detector and maintaining the capability to quickly disconnect via the switch. This prior preparation ensures that when abnormalities occur, the system can immediately protect the power storage device, thus cushioning against potential damage before it occurs.
3Reliability
If the motor generator is equipped with integrated abnormality detection and control functions, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent divides the abnormality detection and control functions into separate components: an abnormality detector that monitors motor generator output and a switch controller that manages connection/disconnection. This segmentation allows each component to be simpler and more cost-effective while collectively providing reliable abnormality detection and protection, resolving the contradiction between reliability and 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
This configuration enhances energy efficiency, reduces costs by minimizing the load on lead batteries, and ensures reliable operation by promptly stopping the motor generator in case of abnormalities, thus maintaining vehicle performance and reducing the complexity and cost of the power source system.
Implementation Method 1
a motor generator (16) which is coupled to an engine (12)
Implementation Method 2
a power storage (27, 28) which is coupled to the motor generator (16)
Data Source
AI summary
A vehicle power source includes a motor generator, a power storage, a switch, an abnormality detector, and a switch controller. The motor generator is coupled to an engine. The power storage is coupled to the motor generator. The switch is controlled between a conductive state and a cut-off state, in which the conductive state involves coupling the motor generator to the power storage, and the cut-off state involves separating the motor generator from the power storage. The abnormality detector is provided separately from the motor generator and detects abnormality of the motor generator. The switch controller is provided separately from the motor generator and controls the switch from the conductive state to the cut-off state when the abnormality of the motor generator is detected.