Centrifugal Blower Motor Controller Anti-Noise

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Solution Overview

Problem

Existing noise control systems for centrifugal fan systems are limited in their ability to effectively manage noise across a broad frequency range, are labor-intensive and expensive to install, and often produce unwanted noise due to mechanical or electromechanical actuators.

Innovation Solution

A centrifugal blower system with a motor controller that receives feedback parameters to generate anti-noise by producing vibrations out of phase with noise waves, reducing noise through adaptive control of the motor operation and system characterization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If passive noise reduction systems are used, then high frequency noise is reduced, but low frequency noise remains unaddressed

Engineering Contradiction:

Improvehigh frequency noiseVSAvoidfrequency range coverage

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent combines passive noise reduction (acoustic materials) with active noise control (electronic actuators and sensors) into a hybrid system that effectively addresses both high and low frequency noise across a broad spectrum

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The noise control system is designed to handle multiple frequency ranges simultaneously through a multi-functional approach, where acoustic materials address high frequencies while electronic actuators handle low frequencies

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Object-affected harmful factors

If active noise control systems are used, then low frequency noise is reduced, but high frequency noise remains unaddressed

Engineering Contradiction:

Improvelow frequency noiseVSAvoidfrequency range coverage

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent merges active noise control technology with passive acoustic materials to create a comprehensive system that covers the entire frequency spectrum, with electronic actuators targeting low frequencies and acoustic materials handling high frequencies

Inventive Principle:

Principle #5Merging (Combining)

3Object-affected harmful factors

If mechanical actuators are used for noise control, then noise cancellation is achieved, but additional unwanted noise is generated

Engineering Contradiction:

Improvenoise cancellationVSAvoidactuator noise

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent replaces traditional mechanical actuators with electronic actuators that generate anti-noise signals through electromagnetic fields, significantly reducing the mechanical noise generated by moving parts while maintaining effective noise cancellation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Object-affected harmful factors

If traditional noise control systems are installed, then noise reduction is achieved, but installation is labor-intensive and expensive

Engineering Contradiction:

Improvenoise reductionVSAvoidinstallation complexity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The system incorporates adaptive algorithms that automatically tune and optimize noise control parameters without requiring manual adjustment or complex installation procedures, making the system easier to install and maintain

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system uses feedback from sensors to automatically adjust actuator signals in real-time, eliminating the need for complex manual tuning and simplifying the installation process

Inventive Principle:

Principle #23Feedback

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 system effectively reduces noise across a broad frequency range, increases efficiency, and decreases the need for manual tuning and additional components, thereby reducing installation costs and noise production.

Implementation Method 1

The motor is configured to receive the first instruction and generate at least one axis of vibration in response to the first instruction. The at least one axis of vibration is configured to cancel the pressure wave.

Methodology Applied

Scientific EffectVibration: Vibration

Implementation Method 2

The motor controller is configured to receive a first feedback parameter and transmit a first instruction based on the first feedback parameter. The first feedback parameter is indicative of a pressure wave moving through the airflow.

Methodology Applied

Scientific EffectAnti-noise: Sound

Data Source

PatentUS10371171B2System and methods for reducing noise in an air moving system

Publication Date: 2019.08.06 REGAL BELOIT AMERICA INC

AI summary

A centrifugal blower system includes a centrifugal blower assembly for generating airflow. The centrifugal blower assembly includes a housing, a motor coupled to the housing, and at least one impeller coupled to the motor. A motor controller is coupled to the motor. The motor controller is configured to receive at least one feedback parameter and to transmit instructions to the motor to control an operation of the motor based on the at least one feedback parameter. The operation of the motor is configured to reduce noise in the centrifugal blower system.