Scroll Compressor Torque Control for Vibration Reduction
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Solution Overview
Problem
Scroll compressors experience vibrations due to acceleration forces during compression and decompression, leading to reduced operating life and increased wear, which is particularly problematic in electric vehicles where low vibrations are desired to maintain component integrity.
Innovation Solution
A method and controller for a scroll compressor that measures acceleration forces and adjusts the motor's torque progression to minimize these forces by shifting the torque phase and amplitude, ensuring reduced vibrations and extended operational life without requiring additional power or a more powerful motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the scroll compressor operates with standard torque progression, then the compression function is maintained, but strong vibrations occur that damage components and reduce operating life
Solution Approach 1:
The patent applies dynamics by making the torque progression adjustable and adaptable rather than fixed. The control system dynamically modifies the torque progression based on measured acceleration forces, allowing the motor to adapt its torque output to minimize vibrations while maintaining compression function. This dynamic adjustment resolves the contradiction between maintaining reliable operation and reducing harmful vibrations.
Solution Approach 2:
The patent changes the torque progression parameters (amplitude and phase) to optimize performance. By measuring acceleration forces and adjusting torque parameters accordingly, the system reduces vibration-induced damage while preserving the compression function. This parameter optimization directly addresses the contradiction between reliability and vibration reduction.
2Object-affected harmful factors
If a more powerful motor is used to reduce vibrations, then vibration levels decrease, but energy consumption increases
Solution Approach 1:
Instead of increasing motor power, the patent optimizes the existing motor's torque progression parameters. By adjusting torque amplitude and phase to match the compression cycle requirements, the system reduces vibrations without additional power consumption. This resolves the contradiction between vibration reduction and energy efficiency.
Solution Approach 2:
The control system uses feedback from acceleration force measurements to self-adjust the torque progression. This closed-loop control allows the system to automatically optimize vibration reduction without external intervention or additional power input, resolving the contradiction between vibration control and energy consumption.
3Object-affected harmful factors
If internal sensors are added to the scroll compressor to enable precise control, then vibration control improves, but device complexity and cost increase
Solution Approach 1:
The patent uses external measurement devices as intermediaries to obtain acceleration force data without adding internal sensors to the scroll compressor. This approach enables precise vibration control while avoiding the complexity and cost of internal sensor integration, resolving the contradiction between vibration control and device simplicity.
Solution Approach 2:
The patent replaces the need for internal mechanical sensors with external measurement systems. By measuring acceleration forces from the outside and using this data to control torque progression, the system achieves precise vibration control without the complexity of internal sensing mechanisms.
Data Source
AI summary
The invention relates to a method used to control a scroll compressor having a first and a second spiral, in particular that are arranged one inside the other. The first spiral can be moved by a motor relative to the second spiral for a decompression or compression operation of the scroll compressor. The invention reduces vibration (actual acceleration forces) in the scroll compressor to allow for a longer service life by adapting a torque curve of the motor on the basis of measured acceleration forces on the scroll compressor which, in turn, is based on the position and/or positional angle of the first spiral relative to the second spiral such that the acceleration forces are reduced below a threshold or minimized.