Motor Driving Control Switch Unit for Multiple Fan Motors
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Solution Overview
Problem
Existing motor driving systems require complex identification information management for multiple fan motors, leading to increased manufacturing difficulty and maintenance load, as well as processing overhead due to unnecessary communication with non-target devices.
Innovation Solution
A motor driving system with a controller and switch unit that enables or disables communication lines to specific motor driving control devices, allowing efficient operation without identification information, using a demultiplexer configuration to reduce circuit complexity and wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ID information is written in each motor driving control device and included in instruction information, then each motor driving control device can determine whether the instruction is addressed to itself and perform different control, but the manufacturing difficulty increases and maintenance load increases
Solution Approach 1:
The patent segments the communication process into two distinct phases: a communication enablement phase where the switch unit activates the communication line for a specific motor driving control device, and a communication execution phase where instruction information is transmitted. This segmentation eliminates the need for ID information in instruction data, as the switch unit's activation pattern inherently identifies the target device, thereby simplifying manufacturing while maintaining the ability to differentiate control instructions.
Solution Approach 2:
The switch unit serves as an intermediary component between the control device and multiple motor driving control devices. It mediates the communication by selectively enabling communication lines based on which motor driving control device should receive instructions. This intermediary mechanism replaces the need for embedded ID information, as the switch unit's selective activation inherently addresses instructions to the correct target device.
2Ease of operation
If ID information is written in each motor driving control device and included in instruction information, then each motor driving control device can determine whether the instruction is addressed to itself and perform different control, but the maintenance load increases
Solution Approach 1:
The patent segments the communication process into two distinct phases: a communication enablement phase where the switch unit activates the communication line for a specific motor driving control device, and a communication execution phase where instruction information is transmitted. This segmentation eliminates the need for ID information in instruction data, as the switch unit's activation pattern inherently identifies the target device, thereby simplifying manufacturing while maintaining the ability to differentiate control instructions.
Solution Approach 2:
The switch unit serves as an intermediary component between the control device and multiple motor driving control devices. It mediates the communication by selectively enabling communication lines based on which motor driving control device should receive instructions. This intermediary mechanism replaces the need for embedded ID information, as the switch unit's selective activation inherently addresses instructions to the correct target device.
3Productivity
If communication lines are always enabled for all motor driving control devices, then all devices can receive instructions, but processing overhead increases due to unnecessary communication with non-target devices
Solution Approach 1:
The patent segments the communication process into two distinct phases: a communication enablement phase where the switch unit activates the communication line for a specific motor driving control device, and a communication execution phase where instruction information is transmitted. This segmentation eliminates the need for ID information in instruction data, as the switch unit's activation pattern inherently identifies the target device, thereby simplifying manufacturing while maintaining the ability to differentiate control instructions.
Solution Approach 2:
The switch unit operates periodically to enable communication lines for different motor driving control devices in sequence. Each motor driving control device receives communication enablement at specific time intervals, allowing the system to efficiently manage multiple devices without continuous communication overhead. This periodic activation pattern ensures that only the intended target device processes instructions at any given time.
Data Source
AI summary
A motor driving system has a first motor, a first motor driving control device for driving the first motor, a second motor, a second motor driving control device for driving the second motor, a controller performing communication with the first motor driving control device and the second motor driving control device, a first communication line for connecting a common terminal of the controller and the first motor driving control device; a second communication line for connecting the common terminal and the second motor driving control device, and a switch unit capable of switching each of the first and second communication lines between an enable state in which communication is possible by the communication line and an disable state in which communication is impossible under control of the controller. The controller controls the switch unit to set either the first or the second communication line to the enable state.