Fan Motor Type Identification via Speed Feedback
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Solution Overview
Problem
In air blowing systems, identifying the type of fan motor unit without outputting a special signal is challenging due to varying relationships between air flow rate instructions and actual air flow rates across different fan motor units, necessitating a method to determine the type based on standard operating conditions.
Innovation Solution
The method involves the controller outputting a standard air flow rate instruction to the fan motor unit, acquiring the resulting speed notification, and identifying the type by correlating the instruction and notification using pre-stored correspondence information, allowing for type identification without a special identification signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a special identification signal is output by the controller to identify the fan motor unit type, then the type identification accuracy is improved, but the system complexity and interface requirements increase
Solution Approach 1:
The fan motor unit automatically provides speed notification information to the controller without requiring any special identification signals or additional interfaces. The existing operational data (speed notifications) is reused for type identification, making the system self-sufficient and eliminating the need for specialized identification mechanisms.
Solution Approach 2:
The controller uses the feedback information (speed notifications) already provided by the fan motor unit during normal operation to determine the fan motor unit type. By analyzing the relationship between air flow rate instructions and the resulting speed notifications, the controller can identify the type without requiring additional identification signals or interfaces.
2Reliability
If a special identification signal and interface are required, then the type identification reliability is improved, but the ease of operation and compatibility decrease
Solution Approach 1:
The existing communication interface between the controller and fan motor unit is made multi-functional. It not only transmits control commands (air flow rate instructions) and operational data (speed notifications) but also enables type identification by analyzing the relationship between these signals. This universal interface approach eliminates the need for separate identification interfaces and maintains compatibility across different fan motor unit types.
3Adaptability or versatility
If the relationship between air flow rate instruction and actual air flow rate varies by type, then the adaptability to different fan motor units is improved, but the difficulty of detecting and measuring the type increases
Solution Approach 1:
The controller utilizes the speed notification feedback from the fan motor unit to detect its type. By comparing the air flow rate instruction sent to the fan motor unit with the actual speed notification received, the controller can identify the fan motor unit type based on the characteristic relationship between these signals, which differs for each type.
Solution Approach 2:
The patent replaces physical identification methods (such as mechanical tags, labels, or special interfaces) with an electronic signal analysis approach. The controller detects the fan motor unit type by analyzing the electrical signal relationship between air flow rate instructions and speed notifications, eliminating the need for physical identification mechanisms.
Data Source
AI summary
An identification method that identifies a type of a fan motor unit in an air blowing system that includes: a fan motor unit including a motor, a fan, and a casing; and a controller that controls the fan motor unit. The fan motor unit blows air to the outside. The identification method includes: a first step of the controller outputting, to the fan motor unit, a first air flow rate instruction that is output at a time of performing control to cause the fan motor unit to operate normally; a second step of the controller acquiring a first speed notification that is output from the fan motor unit in response to the outputting of the first air flow rate instruction; and a third step of the controller identifying, based on the first air flow rate instruction and the first speed notification, a type of the fan motor unit and outputting a type identification signal indicating the identified type.