Electric Compressor Speed Control for EV Cabin Cooling Balance
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Solution Overview
Problem
Conventional electric compressor control strategies for new energy vehicles fail to balance cooling speed, temperature stability, and energy consumption effectively, as they are based on internal combustion engine vehicles and do not consider factors like user preferences, ambient conditions, and vehicle dynamics.
Innovation Solution
A system and method that adjusts the electric compressor's rotation speed based on user settings, vehicle velocity, ambient temperature, solar illumination, and internal temperature to optimize cooling performance and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the electric compressor rotation speed is increased to achieve faster cooling speed, then the cooling performance is improved, but the energy consumption increases
Solution Approach 1:
The control system dynamically adjusts the electric compressor rotation speed based on real-time detection of vehicle ambient temperature, solar illumination, vehicle interior temperature, and vehicle driving velocity. The system determines a target rotation speed that optimizes cooling performance while minimizing energy consumption, rather than operating at fixed or maximum speed continuously.
Solution Approach 2:
The system changes the operating parameters of the electric compressor by adjusting rotation speed according to multiple environmental and operational factors. The control apparatus calculates optimal rotation speed limits based on detected parameters such as ambient temperature, solar illumination intensity, and vehicle velocity, thereby achieving efficient cooling with reduced energy consumption.
2Use of energy by moving object
If the electric compressor rotation speed is limited to reduce energy consumption, then the energy efficiency is improved, but the cooling performance may be insufficient
Solution Approach 1:
The control system continuously monitors vehicle interior temperature, ambient temperature, solar illumination, and vehicle velocity, using this feedback to dynamically adjust the electric compressor rotation speed. The system determines whether speed limitation is appropriate based on real-time cooling requirements, ensuring adequate cooling performance while optimizing energy consumption.
Solution Approach 2:
The system dynamically determines rotation speed limits based on multiple detected parameters. When cooling demand is high (e.g., high ambient temperature, strong solar illumination, low vehicle velocity), the system allows higher rotation speeds to maintain cooling performance. When cooling demand is low, the system limits rotation speed to reduce energy consumption.
3Use of energy by moving object
If the control system considers multiple factors (ambient temperature, solar illumination, vehicle velocity) to optimize energy consumption, then the energy efficiency is improved, but the control complexity increases
Solution Approach 1:
The control apparatus integrates multiple detection functions (temperature sensing, solar illumination detection, velocity detection) and control functions into a single unified system. The control system universally handles various operating conditions by processing multiple parameters through a standardized control algorithm, achieving efficient energy management without proportionally increasing system complexity.
Data Source
AI summary
A system for controlling an electric vehicle includes a user requirement setting apparatus, a vehicle velocity detection apparatus, an out-vehicle temperature detection apparatus, an in-vehicle temperature detection apparatus, a solar illumination detection apparatus, and a control apparatus. The control apparatus is configured to acquire an air conditioner temperature and a blower step number set by a user, a driving velocity of the vehicle, an ambient temperature, a solar illumination outside the vehicle, and the internal temperature of the vehicle, determine a rotation speed limitation rating of the electric compressor, determine a final permitted vehicle velocity, compare the driving velocity of the vehicle and the final permitted vehicle velocity, and when the driving velocity of the vehicle is less than the final permitted vehicle velocity, determine a target electric compressor rotation speed according to the rotation speed limitation rating of the electric compressor.