Compressor and the compressor controlling method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Compressors with magnetic bearings face challenges in detecting abnormal wire connections, opposite coil windings, and bearing orientation, which can lead to unbalanced magnetic fields and reduced performance or damage.
Innovation Solution
A compressor system equipped with gap sensors and a controller that monitor the position of the rotary shaft and magnetic fields around magnetic bearings, determining normal or abnormal wire connections by adjusting current supply to adjacent bearings and measuring positional changes, ensuring proper magnetic field alignment and bearing orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If magnetic bearings are used to support the rotary shaft in the air, then friction is reduced and rotation efficiency is improved, but the risk of abnormal wire connection and coil winding errors increases
Solution Approach 1:
The patent applies preliminary action by performing wire connection verification before the magnetic bearing enters normal operation. The controller executes a verification routine that tests wire connections and coil windings during the initialization phase, detecting abnormalities before they can cause operational failures. This proactive approach ensures that potential issues are identified and addressed prior to affecting rotation efficiency or causing damage.
Solution Approach 2:
The patent implements feedback mechanisms where the controller continuously monitors the magnetic bearing system for abnormal conditions. By detecting changes in magnetic field characteristics, current consumption patterns, or positional deviations, the system provides real-time feedback about wire connection status and coil winding integrity. This enables dynamic adjustment or shutdown to prevent reliability issues from developing.
2Reliability
If complex detection systems are added to monitor magnetic bearing status, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the controller to perform multiple functions: it manages the motor drive, monitors magnetic bearing status, detects wire connection abnormalities, and controls gap sensors. By consolidating these diverse functions into a single controller unit, the system achieves comprehensive monitoring and detection capabilities without proportionally increasing overall system complexity. The same hardware resources are leveraged for multiple purposes.
Solution Approach 2:
The patent implements self-service through automatic diagnostic routines that the system performs on itself. The controller automatically tests wire connections, analyzes coil winding correctness, and identifies bearing abnormalities without requiring external inspection equipment or manual intervention. This self-diagnostic capability enhances reliability while avoiding the complexity of additional external monitoring systems.
3Stability of the object's composition
If current is continuously supplied to all magnetic bearings, then stable magnetic field is maintained, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by implementing intermittent verification of wire connections and coil windings rather than continuous monitoring. The controller performs diagnostic checks at scheduled intervals or at specific operational milestones, allowing the magnetic bearings to operate with stable current supply between checks. This periodic verification approach maintains magnetic field stability while significantly reducing the energy consumption associated with continuous monitoring and adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate detection of abnormal wire connections and coil winding issues, preventing damage and ensuring stable operation by maintaining balanced magnetic fields and proper bearing alignment, thus enhancing the reliability and efficiency of the compressor.
Implementation Method 1
a gap sensor that senses the distance from the rotary shaft
Implementation Method 2
a plurality of magnetic bearings that supports the rotary shaft in the air so that the rotary shaft can rotate
Implementation Method 3
controller that determines abnormal wire connection of the magnetic bearings on the basis of information from the gap sensor, in which controller senses movement of the rotary shaft through the gap sensor while controlling the amount of current supplied to any one of the magnetic bearings
Data Source
AI summary
The present invention provides a compressor that includes: one or more impellers that axially suck and centrifugally compress a refrigerant; a rotary shaft that is connected with the impeller and a motor for rotating the impeller; a plurality of magnetic bearings that supports the rotary shaft in the air so that the rotary shaft can rotate; a gap sensor that senses the distance from the rotary shaft; and a controller that determines abnormal wire connection of the magnetic bearings on the basis of information from the gap sensor. The controller can sense movement of the rotary shaft through the gap sensor while controlling the amount of current supplied to any one of the magnetic bearings and can determine whether there is abnormal wire connection on the basis of the information.