Stator lamination, induction motor, compressor and refrigeration device
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Solution Overview
Problem
Current induction motor designs face challenges in reducing material costs while maintaining efficiency, particularly in the stator and rotor laminations of induction motors used in compressors and refrigeration devices.
Innovation Solution
The design incorporates annular stator and rotor laminations with specific slot and tooth configurations, made of silicon steel, where the stator slot depth is defined by the formula H1=πD1Q1k, and the ratio of stator slot depth to tooth width ranges from 3.8 to 4.0, and rotor slot depth to tooth width ranges from 5.7 to 6.1, optimizing material usage and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the stator slot depth is increased to improve motor efficiency, then the efficiency is improved, but the material cost increases
Solution Approach 1:
The patent applies parameter changes by establishing a specific mathematical relationship for the stator slot depth H1 = πD1Q1k, where k is a coefficient between 1.95 and 2.05. This parameter optimization allows the motor to achieve target efficiency (≥94.5%) while controlling the stator slot depth to reduce material usage and cost.
Solution Approach 2:
The patent uses silicon steel laminations with specific thickness ranges (0.35mm to 0.50mm) for both stator and rotor cores. This material selection and composite lamination structure optimizes the balance between magnetic performance, eddy current loss reduction, and material cost, achieving high efficiency without excessive material consumption.
2Strength
If the stator tooth width is increased to improve structural strength, then the strength is improved, but the material cost increases
Solution Approach 1:
The patent optimizes the stator tooth width T1 by controlling the ratio H1/T1 between 3.8 and 4.0. This parameter optimization ensures sufficient mechanical strength for the stator teeth while minimizing material consumption, contributing to cost reduction without compromising structural integrity.
3Loss of energy
If the rotor slot depth to tooth width ratio is increased to improve electromagnetic performance, then the electromagnetic performance is improved, but the material cost increases
Solution Approach 1:
The patent applies parameter changes by optimizing the rotor slot depth to tooth width ratio H2/T2 to be between 5.7 and 6.1. This specific ratio optimization improves electromagnetic performance and reduces energy loss while controlling material consumption in the rotor lamination.
4Volume of moving object
If the stator inner diameter is reduced to achieve miniaturization, then the size is reduced, but the efficiency may deteriorate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the stator inner diameter D1 within the range of 95mm to 105mm (with a preferred value of 100.1mm) and combining it with optimized slot depth formulas and tooth width ratios. This allows miniaturization of the motor while maintaining efficiency ≥94.5% through coordinated optimization of multiple geometric parameters.
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
This configuration reduces material costs while achieving target efficiency in induction motors, enhancing heat dissipation through strategic winding placement and fluid cooling, thereby improving the performance of compressors and refrigeration devices.
Implementation Method 1
An induction motor is a device for generating induction current in a rotor of the induction motor to achieve energy conversion through electromagnetic induction effect between a stator of the induction motor and the rotor
Data Source
AI summary
A stator lamination, an induction motor, a compressor and a refrigeration device wherein the stator lamination is annular, and an inner circumference of the stator lamination is provided with a plurality of stator teeth and a plurality of stator slots. The plurality of stator teeth and the plurality of stator slots are arranged alternately. The stator lamination defines a stator inner diameter D1, the number of the plurality of stator slots is Q1, each stator slot defines a stator slot depth H1, and the stator slot depth H1 meets a formula:H1=πD1Q1*k.Q1 is greater than or equal to 24, the value range of D1 is 95 mm to 105 mm, and the value range of k is 1.95 to 2.05.