Synchronous Reluctance Motor Layout for Low Torque Ripple
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current induction motors face high investment costs and inefficiencies, with many small and medium-sized manufacturers unable to produce high-efficiency models, leading to subpar energy usage and environmental impact, and a lack of high-efficiency motors in the market.
Innovation Solution
A synchronous reluctance motor design with a four-pole rotor and shared stator, utilizing a specific geometric relationship between magnetic channels and stator yoke widths to achieve high efficiency, low torque ripple, and reduced material usage, combined with a systematic design process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If induction motors are produced in multiple pole configurations (two-pole/four-pole/six-pole) to meet diverse market needs, then market coverage is improved, but investment cost of tools and dies increases significantly
Solution Approach 1:
The patent applies universality by designing a synchronous reluctance motor with a four-pole rotor that can share the same stator with induction motors, allowing one stator design to serve multiple motor types and pole configurations, thereby reducing the need for separate tooling and dies for each motor variant
2Reliability
If small and medium-sized motor manufacturers produce high-efficiency motors with multiple pole designs, then product performance is improved, but development cost increases
Solution Approach 1:
The patent enables small and medium-sized manufacturers to produce high-efficiency motors by providing a universal stator design that works with four-pole synchronous reluctance motors, eliminating the need for separate development programs for each pole configuration and significantly reducing development costs
Solution Approach 2:
The patent changes the motor type parameter from traditional induction motor to synchronous reluctance motor with specific magnetic channel geometry, achieving high efficiency while using the same stator infrastructure, thus improving motor efficiency without proportionally increasing development cost
3Strength
If rotor aluminum die-casting or copper die-casting processes are used in traditional motor design, then structural integrity is improved, but raw material usage and environmental impact increase
Solution Approach 1:
The patent extracts and eliminates the aluminum die-casting or copper die-casting processes from the rotor manufacturing, replacing them with a design that uses laminated steel structures with magnetic channels, thereby reducing raw material usage and simplifying the recycling process while maintaining structural integrity through the laminated construction
4Power
If synchronous reluctance motor uses non-uniform magnetic channel widths, then torque characteristics are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by implementing non-uniform magnetic channel widths where the first magnetic channel has a different width than the second magnetic channel, optimizing torque characteristics for specific applications while the overall design maintains manufacturability through controlled geometry relationships
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 design reduces development costs, enhances energy efficiency, and enables high-power density with low torque ripple, suitable for high-value applications like machine tools and electric vehicles, promoting high-efficiency motor production.
Implementation Method 1
synchronous reluctance motor, comprising: a stator, comprising a plurality of stator slots, a plurality of stator teeth, and a stator edge... and a rotor, comprising a plurality of motor poles, each of the motor poles comprising a plurality of rotor barriers and a plurality of magnetic channels
Data Source
AI summary
The present invention provides a synchronous reluctance motor, comprising: a stator including a plurality of stator slots, a plurality of stator teeth, a stator edge, and a stator yoke width (Wy); and a rotor including a plurality of motor poles, each motor pole includes a plurality of rotor barriers and the first to n-th magnetic channels. The first magnetic channel includes the first magnetic channel width (W1), the n-th magnetic channel includes the n-th magnetic channel width (Wn), n is a positive integer greater than 1, wherein, each motor poles includes a sum of the widths of the plurality of magnetic channels (ΣW). The formula for ΣW is∑W=W12+W2+ … +Wn-1+Wn,wherein, the relationship between ΣW and the width of the stator yoke (Wy) is:0.7≤∑WWy≤1.3.Furthermore, the present invention also provides a design method of a synchronous reluctance motor.