Laminated Compressor Motor Core for Low-Loss Wide-Speed Operation
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Solution Overview
Problem
Air conditioning systems face inefficiencies and high energy consumption due to suboptimal compressor motors, particularly in varying load conditions, and require improved noise, vibration, and harshness (NVH) characteristics, while also needing to contribute to environmental protection without increasing consumer costs.
Innovation Solution
An electric compressor motor with a laminated core made of electrically insulated steel or sheet metal alloy, specifically formulated with elements like silicon, aluminum, and iron, optimized for density and magnetic properties, which can be used in air conditioning, heat, or fluid pumps, and designed to operate efficiently across a wide speed range with reduced iron losses and enhanced NVH performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional compressor motors are used in air conditioning systems, then the initial cost is lower, but energy consumption is high and efficiency is low
Solution Approach 1:
The patent changes the physical parameters of the electrical steel by controlling alloy composition (Si: 2.00-3.50 wt.%, Al: 0.05-2.00 wt.%, Mn: 0.05-1.00 wt.%) and density (7.30-7.75 g/cm³) to optimize magnetic properties and reduce iron losses across different operating conditions
Solution Approach 2:
The patent uses composite electrical steel materials with specific multi-element alloy compositions combining Si, Al, Mn, and other elements to achieve optimized magnetic properties and reduced energy losses while maintaining mechanical strength
2Adaptability or versatility
If compressor motors operate at rated operating point, then efficiency is high, but they cannot adapt to varying load conditions in air conditioning systems
Solution Approach 1:
The patent optimizes the electrical steel properties (density: 7.30-7.75 g/cm³, alloy composition) to maintain high efficiency across a broad speed range from partial load to rated operation, enabling the motor to adapt to varying air conditioning load conditions without significant efficiency degradation
3Ease of operation
If frequency converter is used to adjust motor speed, then energy savings and speed control are achieved, but harmonics increase iron losses
Solution Approach 1:
The patent modifies the electrical steel composition (increased Si content: 2.00-3.50 wt.%, optimized Al: 0.05-2.00 wt.%) and density (7.30-7.75 g/cm³) to reduce core losses at higher frequencies, enabling the motor to operate efficiently with frequency converters that generate harmonics up to 30 kHz and beyond
4Adaptability or versatility
If compressor motors are located close to consumers, then installation flexibility is improved, but NVH characteristics become more critical
Solution Approach 1:
The patent optimizes the electrical steel density (7.30-7.75 g/cm³) and alloy composition to reduce iron losses and associated vibrations, thereby improving NVH characteristics when compressor motors are installed close to consumers in modern air conditioning 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 solution achieves higher efficiency and lower energy losses, improved NVH characteristics, and reduced consumer costs, contributing to environmental protection by optimizing compressor motor performance in air conditioning and heat pump applications.
Implementation Method 1
an electric compressor motor for air conditioning systems or heat or fluid pumps with stator and rotor, wherein the stator and/or rotor comprises a laminated core of mutually electrically insulated laminations made of electrical steel or sheet
Implementation Method 2
laminated core of mutually electrically insulated laminations
Data Source
Figure 1
AI summary
The present invention relates to an electric compressor motor for air conditioning systems or heat or fluid pumps with stator and rotor.