Fan Assembly Sinusoidal Brushless Motor Nested Stator Rotor
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Solution Overview
Problem
Existing fan assemblies for industrial environments face challenges in achieving high torque and speed while maintaining compact dimensions and low cost, often requiring compromises among efficiency, size, and economy.
Innovation Solution
A fan assembly featuring a sinusoidal brushless electric motor with internal rotor and fractional slot concentrated wound design, utilizing permanent magnets arranged within the rotor slots to optimize torque and speed performance, reducing size and weight, and enhancing mechanical strength and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If fan assemblies use conventional motor designs to achieve high torque and speed, then performance is improved, but device size and weight increase
Solution Approach 1:
The motor design nests the stator windings within the rotor structure through fractional slot concentrated winding, where the stator teeth are positioned within the rotor body. This nested configuration eliminates the need for separate stator and rotor housings, reducing overall motor weight while maintaining torque and speed performance.
Solution Approach 2:
The patent changes the fundamental parameters of motor construction by using fractional slot concentrated winding with specific slot-to-pole ratios (e.g., 6 slots per pole per phase) and optimizing magnet arrangement. These parameter changes enable higher power density, achieving high torque and speed with reduced motor weight compared to conventional designs.
2Power
If fan assemblies use conventional motor designs to achieve high torque and speed, then performance is improved, but device dimensions increase
Solution Approach 1:
The nested stator-within-rotor configuration allows the motor to achieve the same power output in a more compact volume. The stator teeth are embedded within the rotor body, eliminating wasted space and reducing the overall motor envelope while maintaining high torque and speed capabilities.
Solution Approach 2:
By changing the winding configuration to fractional slot concentrated winding and optimizing the slot-to-pole ratio, the motor achieves higher power density. This allows the same torque and speed performance to be achieved in a smaller volume compared to conventional distributed winding designs.
3Volume of moving object
If fan assemblies optimize for compact size, then device dimensions are reduced, but torque and speed performance deteriorate
Solution Approach 1:
The fractional slot concentrated winding with optimized slot-to-pole ratios changes the magnetic circuit parameters to achieve higher torque density. This allows compact motor volume while maintaining or even improving torque and speed performance compared to conventional designs.
Solution Approach 2:
The motor uses composite construction combining permanent magnets, magnetic laminations, and optimized winding patterns. This composite approach maximizes the magnetic field strength within the limited volume, achieving high torque and speed performance in a compact package.
4Power
If fan assemblies use advanced motor designs to improve efficiency and performance, then operating features are optimized, but manufacturing cost increases
Solution Approach 1:
The fractional slot concentrated winding divides the stator windings into discrete concentrated coils in each slot, which are easier to manufacture than continuous distributed windings. This segmentation simplifies the winding process, reduces the need for complex insulation, and lowers manufacturing cost while maintaining high electrical efficiency.
Solution Approach 2:
By changing the winding configuration to fractional slot concentrated winding with specific parameters (e.g., 6 slots per pole per phase), the motor achieves high efficiency through improved magnetic field distribution and reduced losses. These parameter changes also simplify manufacturing compared to conventional designs, reducing overall cost.
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 solution achieves improved performance with reduced size and cost, increased air passage, and enhanced mechanical strength, power-to-weight ratio, and electrical efficiency, addressing the need for compact, efficient, and economical fan assemblies.
Implementation Method 1
an electric motor 30 comprising a stator 31 and a rotor 32... the rotor 32 includes a plurality of rotor poles 321... each rotor pole 321 comprises a pair of magnets 325
Implementation Method 2
In a preferred embodiment, the electric motor 30 is of the sinusoidal brushless type, i.e., brushless... In one embodiment, the electric motor 30 is of the type belonging to the family of electric motors known as PMSM (Permanent Magnet Synchronous Motor)
Data Source
Figure 1a
Figure 1b
Figure 2a~2b
AI summary
This invention relates to a fan assembly (1) comprising a blade group (2) commandable in rotation about an axis (X-X), and a motor group (3) extending along the axis (X-X) and supporting said blade group (2). Specifically, the motor group (3) comprises: (i) a drive shaft (37) extending along the axis (X-X) rotationally connected with the blade group (2); (ii) an electric motor (30) comprising a stator (31) and a rotor (32). Said rotor (32) is operatively connected to the drive shaft (37) and comprises a plurality of rotor poles (321), wherein each rotor pole (321) comprises two magnets (325) respectively mirrored relative to an imaginary plane (P) on which the axis (X-X) lies.