Compressor Control Duty Ratio Compensation for Low-Speed Vibration
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Solution Overview
Problem
Existing compressor control technologies face challenges in efficiently operating reciprocating compressors at low speeds, as they often result in increased vibration and reduced efficiency due to the need for higher current usage to maintain operation.
Innovation Solution
A compressor control apparatus and method that dynamically compensates the duty ratio of control signals during compression and suction strokes, allowing for optimized current application based on the operating state of the compressor, thereby improving efficiency and reducing vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the compressor operates at low speed to reduce power consumption, then energy efficiency is improved, but vibration increases and operational stability deteriorates
Solution Approach 1:
The patent applies dynamics by making the current compensation value variable based on operating conditions. Specifically, the compensation value changes dynamically according to piston position (compression vs. suction stroke) and operating speed, allowing the system to adapt to low-speed conditions where vibration becomes problematic while maintaining energy efficiency.
Solution Approach 2:
The patent changes the parameter of current compensation value based on different operating states. By detecting piston position and operating speed, the system adjusts the compensation value to different levels (higher compensation at low speeds to counteract vibration, lower compensation at high speeds to maintain efficiency), resolving the contradiction between energy consumption and vibration control.
2Adaptability or versatility
If the compressor operates at low speed to expand operation region, then adaptability is improved, but compression efficiency decreases due to increased current requirements
Solution Approach 1:
The system dynamically adjusts current compensation based on real-time detection of piston position and operating speed. This allows the compressor to operate efficiently across a wide speed range by optimizing current application for each specific operating condition, thereby expanding the viable operation region without sacrificing compression efficiency.
Solution Approach 2:
The patent segments the operating cycle into distinct phases (compression stroke and suction stroke) and applies different compensation strategies to each phase. This segmentation allows optimized current control for each stroke type, improving overall efficiency while enabling operation across a broader speed range.
3Reliability
If current is increased to maintain operation at low speed, then operational stability is improved, but power consumption increases and efficiency decreases
Solution Approach 1:
The patent implements dynamic current compensation that adapts to operating conditions. At low speeds where stability is challenging, the system increases compensation to maintain stable operation. However, this compensation is applied intelligently based on piston position and speed detection, ensuring stability without excessive power consumption that would occur with constant high current application.
Solution Approach 2:
The system changes the current compensation parameter based on detected operating conditions. By adjusting compensation levels according to piston position (different values for compression vs. suction strokes) and operating speed, the system maintains operational stability while optimizing power consumption, avoiding the inefficiency of fixed high-current operation.
Data Source
AI summary
A compressor control apparatus and method differently compensate for a duty ratio of a control signal during a period in which the compressor performs a compression stroke and a period in which the compressor performs a suction stroke, respectively, to generate the control signal for controlling a compressor.