Common Stator Drives Multiple Armatures
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Solution Overview
Problem
Existing moving magnet motor designs for loudspeakers often require multiple stators, which increase parts count, manufacturing complexity, and electrical resistance, while reducing packaging efficiency and magnetic performance.
Innovation Solution
A single, common stator is used to drive multiple armatures, employing high magnetic permeability cores and coils to generate magnetic flux across a shared air gap, reducing the number of parts and improving magnetic performance by minimizing electrical resistance and optimizing space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple stators are used to drive multiple armatures, then each armature can be independently driven, but the parts count increases, manufacturing complexity increases, and electrical resistance increases
Solution Approach 1:
The patent merges multiple stators into a single common stator that drives multiple armatures simultaneously. The common stator includes a single coil assembly and magnetic circuit that interacts with multiple armatures, each having its own permanent magnet. This consolidation reduces the parts count from multiple stators to one common stator while maintaining the capability to drive multiple armatures, thereby resolving the contradiction between independent driving capability and device complexity.
Solution Approach 2:
The common stator is designed to perform multiple functions by simultaneously driving multiple armatures. A single coil assembly generates magnetic flux that interacts with multiple permanent magnets on different armatures, enabling one stator structure to replace what would traditionally require multiple separate stators. This multi-functionality approach reduces manufacturing complexity and parts count while preserving independent armature control.
2Ease of operation
If multiple stators are used to drive multiple armatures, then each armature can be independently driven, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple stator assemblies into one common stator structure with a single coil assembly. This merging reduces the number of manufacturing steps, eliminates the need to manufacture and assemble multiple separate stator units, and simplifies the overall manufacturing process. The common stator can be manufactured as a single integrated component or pre-assembled unit, significantly reducing manufacturing complexity compared to producing multiple separate stators.
3Ease of operation
If multiple stators are used to drive multiple armatures, then each armature can be independently driven, but electrical resistance increases
Solution Approach 1:
The patent consolidates multiple coil assemblies into a single common coil assembly that generates magnetic flux for multiple armatures. This single coil assembly has lower electrical resistance compared to multiple separate coil assemblies because the current path is consolidated and optimized. The magnetic flux generated by the single coil interacts with multiple permanent magnets on different armatures, achieving the same driving function with reduced electrical resistance and improved energy efficiency.
4Ease of operation
If multiple stators are used to drive multiple armatures, then each armature can be independently driven, but packaging efficiency decreases and magnetic performance is reduced
Solution Approach 1:
The patent merges multiple stator volumes into a single common stator structure, which occupies less space than multiple separate stators would require. The common stator shares a unified magnetic circuit and coil assembly that serves multiple armatures, eliminating the redundant space that would be required for multiple separate stator housings, mounting structures, and air gaps. This consolidation improves packaging efficiency by reducing the overall volume occupied by the motor assembly.
Solution Approach 2:
The common stator is designed as a universal structure that can interact with multiple armatures simultaneously, maximizing the utilization of magnetic flux and space. The single coil assembly generates magnetic flux that is distributed to multiple permanent magnets on different armatures, achieving better magnetic performance through optimized flux distribution and reduced magnetic circuit reluctance compared to multiple separate stator systems.
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 use of a single common stator reduces the number of parts, lowers electrical resistance, and enhances magnetic performance, leading to a more efficient and compact loudspeaker design with improved packaging benefits.
Implementation Method 1
A pair of coils are wrapped around the at least one core for carrying current to generate magnetic flux across the at least one air gap for the armatures to interact with
Implementation Method 2
The common stator is configured for creating magnetic flux across the air gap for the armatures to interact with, thereby to drive motion of the at least one load
Data Source
AI summary
An apparatus includes at least one load and a plurality of armatures, each including a permanent magnet, which are coupled to the at least one load to cause the at least one load to move. The apparatus also includes a common stator that defines an air gap within which the plurality of armatures is disposed. The common stator is configured for creating magnetic flux across the air gap for the armatures to interact with, thereby to drive motion of the at least one load.