Compressor Speed Control Using Feedforward and Evaporation Feedback
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Solution Overview
Problem
Existing compressor control methods in air conditioning systems of electric vehicles do not adequately consider various factors affecting compressor rotational speed, leading to significant control errors and inefficient energy consumption, thereby limiting the driving range of electric vehicles.
Innovation Solution
A method and apparatus that determine a compressor's rotational speed through feedforward and feedback controls based on refrigeration demand and evaporation temperature error data, combining these to achieve a target rotational speed that aligns with actual refrigeration needs, reducing energy consumption and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the compressor rotational speed is increased to enhance refrigeration capacity, then the refrigeration capacity is improved, but the energy consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of compressor rotational speed based on real-time refrigeration demand detection. The system continuously monitors refrigeration demand and adjusts the compressor speed dynamically rather than operating at fixed or constantly high speeds, thereby matching energy consumption to actual refrigeration needs and improving overall energy efficiency.
Solution Approach 2:
The system changes the operational parameters of the compressor by adjusting rotational speed based on detected refrigeration demand. By varying the speed parameter according to actual system needs, the patent optimizes the balance between refrigeration capacity and energy consumption, avoiding unnecessary energy waste while maintaining adequate cooling performance.
2Productivity
If the compressor rotational speed is adjusted to meet refrigeration demand, then the refrigeration efficiency is improved, but the control precision deteriorates due to insufficient consideration of affecting factors
Solution Approach 1:
The patent employs a feedback mechanism that detects refrigeration demand and uses this information to adjust compressor rotational speed. The system continuously monitors the refrigeration demand and feeds this information back to the control unit, which then adjusts the compressor speed accordingly, thereby improving control precision while maintaining high refrigeration efficiency.
Data Source
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AI summary
A compressor control method and apparatus, a device and a storage medium are provided. The method includes: acquiring a refrigeration demand of an evaporator, determining a first compressor rotational speed based on the refrigeration demand, acquiring evaporation temperature error data of the evaporator, determining a second compressor rotational speed based on the evaporation temperature error data, calculating a target compressor rotational speed according to the first compressor rotational speed and the second compressor rotational speed, and controlling a compressor based on the target compressor rotational speed. The control method enables rotational speed of compressor to be closer to a rotational speed required by an actual refrigeration demand and effectively reduces errors, allowing air conditioning system to exert optimal performance.