Blower Control Hub Integrating Transformer and Speed Logic
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Solution Overview
Problem
The existing blower control systems face issues with poor coordination between mechanical and electrical contractors during installation, leading to confusion and errors in wiring, particularly due to the need for a transformer to step down AC power to 24 VDC, resulting in frequent help-line responses for diagnosis and installation assistance.
Innovation Solution
A control system hub that includes a transformer to match input power to the required 24 VDC for controllers and provides a 0-10 VDC signal for motor speed control, featuring a selector switch for operation modes (Hand, Off, Auto, and Auto Scaled) to simplify installation and coordination between contractors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a transformer is used to step down AC power to 24 VDC for the controller, then the power conversion function is achieved, but the device complexity and installation difficulty increase
Solution Approach 1:
The patent combines the transformer, power supply circuitry, and control logic into an integrated control system hub that receives AC power input and outputs both 24 VDC power and 0-10 VDC control signals. This consolidation eliminates the need for separate transformer installation and wiring, reducing installation complexity while maintaining power conversion functionality.
Solution Approach 2:
The control system hub performs multiple functions simultaneously: it steps down AC power to 24 VDC, generates 0-10 VDC control signals, and provides motor control. This multi-functionality reduces the number of separate components needed and simplifies the overall system architecture, addressing the installation complexity issue.
2Reliability
If separate wiring is provided for power supply and motor control, then the electrical connections are established, but the coordination difficulty between contractors increases
Solution Approach 1:
The patent integrates power supply and motor control functions into a single control system hub with unified wiring connections. The device accepts AC power input and internally manages both power distribution and control signal generation, eliminating the need for separate wiring paths and reducing coordination challenges between mechanical and electrical contractors.
3Adaptability or versatility
If a built-in speed controller is provided in the motor, then the motor control capability is enhanced, but the overall system complexity increases
Solution Approach 1:
The control system hub provides universal control capability for electronic commutator motors through integrated control logic that generates appropriate control signals. This external control approach achieves the same motor control functionality as built-in controllers but consolidates the control intelligence in a centralized hub, reducing overall system complexity.
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 control system hub simplifies the installation process by standardizing power supply and motor control, reducing errors and improving coordination between contractors, and allowing for flexible speed control of the blower motor, thus enhancing the reliability and efficiency of blower control systems.
Implementation Method 1
a transformer 125 to step down to 24 VDC power voltage for the controller 110 from the power feed of supply source 120
Data Source
AI summary
A fan control system has a fan duct, a fan mounted in the duct, an electronic commutator (EC) motor for driving the fan, and a control system hub for controlling the EC motor. A pressure differential sensing system is mounted in association with duct and feeding a pressure differential signal to the control system hub. An input device mounted on the control system hub for scaling an output signal from a low percent extreme to a high percent extreme and sends that output signal to the EC motor. Wherein the control system hub speeds, slows or switches OFF the EC motor according to the pressure differential signal except that the input device sets a speed limit ceiling on the EC motor.