Wireless Motor Diagnostic System for HVAC Accessibility
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Solution Overview
Problem
Technicians face difficulties in diagnosing electric motor malfunctions in field settings due to the need for physical access and the complexity of accessing motors in equipment like HVAC systems, limiting their diagnostic capabilities.
Innovation Solution
A wireless diagnostic system with a portable device that uses near-field communication to retrieve and process operating data from electric motors, enabling technicians to diagnose malfunctions without removing the motor, and allowing for both static and dynamic testing to determine the cause of faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If technicians use traditional wired diagnostic tools, then they can access motor data, but they must physically access the motor which is difficult for motors installed in equipment like HVAC systems
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless communication system. The portable diagnostic device communicates with the motor controller through wireless signals, eliminating the need for physical cable connections and direct access to the motor. This allows technicians to diagnose motors installed in difficult-to-reach locations such as HVAC systems without requiring physical disassembly or close proximity to the motor.
2Ease of operation
If technicians remove the motor from equipment for diagnosis, then they can easily access it, but equipment downtime increases
Solution Approach 1:
The motor controller performs self-diagnosis by executing test routines internally and storing results in its memory. The portable diagnostic device then retrieves these pre-generated diagnostic data through wireless communication. This eliminates the need to remove the motor from the equipment for testing, as the motor controller itself conducts the diagnostic procedures while installed, thereby reducing equipment downtime while maintaining ease of diagnosis.
3Ease of operation
If technicians use portable diagnostic devices, then they gain mobility, but wireless data retrieval from motor memory requires additional communication channels
Solution Approach 1:
The patent segments the diagnostic process into distinct communication phases using different wireless channels. One channel is dedicated to retrieving operating data from the motor controller, while another channel is used for transmitting test routines and parameters. This segmentation of communication functions allows the portable diagnostic device to manage multiple data streams efficiently, maintaining technician mobility while organizing the complexity of wireless data retrieval through structured channel allocation.
Data Source
AI summary
A diagnostic device for an electric motor includes a device memory, a wireless communication interface, and a processor. The interface is coupled to the device memory and retrieves, over a first wireless channel, operating data stored in motor memory on the electric motor. The interface transmits, over the first wireless channel, operating parameters to the electric motor. The operating parameters define a test routine for the electric motor. The test routine, when carried out by the electric motor, generates test data corresponding to the operating parameters and that is written to the motor memory. The interface retrieves, over a second wireless channel, the test data stored in the motor memory. The processor is coupled to the device memory and the interface. The processor processes at least the test data to diagnose the malfunction.