Vehicle Power Generator Slip Control for Surplus Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In vehicles equipped with power generators like fuel cell vehicles, surplus power generation can occur due to delays in response to changing power consumption during slips, leading to imbalances and inefficiencies, especially when battery charging capacity is full or temperature is low, resulting in wasteful consumption of electric power.
Innovation Solution
A power generation controller is implemented to detect slip conditions and adjust the power generation amount by calculating a reduction in the required power generation based on the slip extent and battery charging capacity, using transfer functions to account for delays in the power generator's response, thereby ensuring the power generation amount is neither too much nor too little.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power generator operates based on electric power required by the load without further reduction during slip, then the power generation responds to driving power requirements, but surplus power is generated due to response delay causing power balance loss and wasteful consumption
Solution Approach 1:
The control device performs preliminary reduction of the required power generation amount when slip is detected, anticipating the power balance issue before surplus power is generated. By proactively reducing the power generation command in advance based on slip detection, the system prevents surplus power generation caused by response delays, thereby maintaining power balance stability and avoiding energy waste.
2Loss of energy
If the required power generation amount is reduced to suppress surplus power, then energy waste is reduced, but the power generation may become insufficient when battery charging capacity is full or temperature is low
Solution Approach 1:
The control device dynamically adjusts the required power generation amount based on real-time battery state (SOC, temperature, charging capacity). When battery charging capacity is sufficient, the device reduces power generation to suppress surplus power. When battery charging capacity is full or temperature is low, the device maintains or increases power generation to ensure adequate power supply. This dynamic adjustment based on varying battery conditions resolves the contradiction between reducing energy waste and ensuring power generation adequacy.
3Ease of operation
If conventional slip control reduces power to drive motor only, then wheel spin is suppressed, but power balance is temporarily lost due to asynchronization between power consumption change and power generator response
Solution Approach 1:
The control device uses feedback from slip detection to adjust the required power generation amount. When slip is detected, the device feeds back this information to the power generation control, reducing the power generation command proportionally to the slip magnitude. This closed-loop feedback mechanism ensures that power generation is synchronized with actual power consumption changes during slip, maintaining power balance while effectively suppressing wheel spin.
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 solution effectively suppresses the generation of surplus power, maintaining a balanced power supply and demand, preventing wasteful consumption and ensuring efficient energy use by dynamically adjusting power generation in response to slip conditions and battery capacity.
Implementation Method 1
a power generator configured to generate electric power using fuel
Data Source
AI summary
A power generation amount of a power generator disposed on a vehicle is appropriately controlled by ordering the power generator a required power generation amount so as to control the power generator, driving a drive motor configured to drive a driving wheel of the vehicle using at least part of electric power generated by the power generator according to the required power generation amount, storing at least part of surplus power left in the electric power generated by the power generator in a storage device, detecting a slip of the driving wheel, and, executing reduction processing of a power generation amount for further reducing a required power generation amount that reflects a reduction amount of the electric power for driving the drive motor due to the slip of the driving wheel, if the detected extent of the slip is larger than a predetermined threshold.