Compressor control method, control apparatus and control system
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Solution Overview
Problem
The existing compressor control methods fail to accurately match torque compensation with the operating cylinder during switching, leading to enhanced vibration and reduced reliability, potentially causing protection shutdowns due to the slower solenoid valve action compared to the drive controller's instruction execution.
Innovation Solution
A compressor control method that involves detecting operating parameters such as power, voltage, and current to determine when a cylinder switching operation is complete, allowing torque compensation to be performed only after confirmation of successful switching, thereby reducing vibration and improving machine reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If torque compensation is switched immediately when a cylinder switching instruction is sent, then the control response is fast, but the torque compensation does not match the actually operating cylinder causing enhanced vibration
Solution Approach 1:
The patent uses feedback by continuously monitoring the operating current of the compressor to detect whether cylinder switching has actually been completed. The controller compares the real-time current with the initial current, and only switches torque compensation when the current change exceeds a preset threshold, ensuring the compensation matches the actual operating state.
Solution Approach 2:
The patent prepares the torque compensation switching condition in advance by setting a current threshold criterion. Before actually switching the torque compensation, the system evaluates whether the current change indicates successful cylinder switching, ensuring the compensation is applied at the correct moment.
2Measurement precision
If the solenoid valve action time is considered, then the cylinder switching completion can be accurately detected, but the overall switching time increases
Solution Approach 1:
The patent replaces mechanical timing methods with electrical current detection. Instead of using mechanical switches or timers to detect cylinder switching, the system monitors the operating current, which changes rapidly and provides an accurate electrical signal for detecting switching completion without adding mechanical delay.
Data Source
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AI summary
Disclosed are a compressor control method, control apparatus and control system. The method comprises : receiving a cylinder switching instruction, and detecting running parameters of a compressor; determining whether a cylinder switching operation is completed according to the running parameters of the compressor; and after it is determined that the cylinder switching operation is completed, executing torque compensation. According to the control method, the control apparatus and the control system, the problem in the prior art that compressor torque compensation does not match an actual running cylinder is solved, vibration caused by the mismatching of compressor torque compensation with the actual running cylinder during cylinder switching is reduced, and the reliability of the overall machine is improved.