BLDC Ventilation Fan Control for Stable Livestock Airflow
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Solution Overview
Problem
Ventilation systems in livestock confinement buildings using induction motors lack the ability to optimize airflow and efficiency, resulting in peaks and valleys in ventilation, making it difficult to maintain optimal growth conditions for livestock, and require significant equipment changes for airflow adjustments.
Innovation Solution
A fan system utilizing a brushless direct current (BLDC) motor with an electronic control system that allows for variable speed control, enabling operation in multiple modes to optimize airflow and efficiency, including constant speed, constant airflow, and maximum efficiency modes, using microprocessors and customizable programs to adjust fan speed based on environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If induction motors are used with on/off control, then the fan system is simple in structure, but the ventilation creates peaks and valleys that fail to maintain optimal growth conditions
Solution Approach 1:
The patent applies dynamics by transitioning from static on/off control to dynamic variable speed control. The BLDC motor enables continuous adjustment of fan speed according to livestock growth stages, eliminating ventilation peaks and valleys while maintaining optimal conditions throughout.
Solution Approach 2:
The patent changes the operational parameter from binary on/off states to continuous variable speed control. The electronic control system adjusts motor speed as a variable parameter based on environmental conditions and livestock needs, resolving the contradiction between operational simplicity and reliability.
2Ease of manufacture
If induction motors are used, then the initial equipment cost is lower, but large changes in airflow require motor replacement which increases complexity and cost
Solution Approach 1:
The patent replaces the mechanical approach of motor replacement for airflow changes with an electronic control system. The BLDC motor with electronic controller enables software-based airflow adjustment, eliminating the need for physical motor changes and reducing system complexity.
Solution Approach 2:
The patent makes the motor system universal by designing a single BLDC motor that can perform multiple functions across different airflow requirements. The electronic control system enables one motor to replace what would traditionally require multiple motors or motor replacements.
3Device complexity
If induction motors operate at fixed speed, then the motor design is simple, but the fans cannot operate at peak efficiency under varying conditions
Solution Approach 1:
The patent applies dynamics by enabling the motor to adapt its speed dynamically to operating conditions. The BLDC motor with electronic control adjusts RPM based on livestock growth stages and environmental conditions, maintaining peak efficiency without excessive design complexity.
Solution Approach 2:
The patent implements feedback through the electronic control system that monitors operating conditions and adjusts motor speed accordingly. This closed-loop control enables the fan to operate at peak efficiency by continuously optimizing performance based on actual conditions.
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
The BLDC motor fan system provides efficient and optimized ventilation by maintaining consistent airflow rates, reducing energy consumption, and adapting to varying environmental conditions, thereby enhancing livestock growth and ventilation system efficiency.
Implementation Method 1
brushless direct current (BLDC) motor
Data Source
Figure 1
Figure 2
Figure 2A
AI summary
A fan for use in agriculture which has a BLDC motor which allows for varying the speed of the fan to vary the airflow rate of the fan and vary the efficiency of the fan. A ventilation system for use in a livestock confinement building to maximize a rate of growth of the livestock. A process for maximizing the growth of livestock in a livestock confinement building by controlling the airflow in the livestock confinement building.