Raytron Technical Review RESEARCH ARTICLE cca-motor-windings

CCA in Motor Windings: Efficiency Considerations

RAYTRON技术团队¹ *

¹RAYTRON集团技术研究中心, 中国

^*Corresponding author

Received: 2025年12月 Accepted: 2026年2月 Published: 2026年3月

DOI: 10.1234/raytron.2026.WP-02-09

Abstract

Motor windings present specific challenges for CCA applications, including efficiency requirements, thermal constraints, and mechanical demands. This white paper examines CCA feasibility in motor windings, efficiency impacts, thermal considerations, and application-specific recommendations.

Key Findings

Stator Loss Increase +60% Higher copper losses with CCA windings
IE3 Feasibility Challenging Difficult to achieve high efficiency grades
Efficiency Drop -1.8% Typical efficiency reduction (11 kW motor)
Best Use Case IE1 Motors Most suitable for lower efficiency classes

Keywords

CCA motor;winding efficiency;thermal considerations;induction motor;motor design

1. Introduction

1.1 Motor Winding Requirements

1.2 CCA Feasibility

创建电机效率等级分布图

MEDIA TODO

Figure Fig. 1 Motor Efficiency Class Distribution

2. Motor Efficiency Standards

2.1 IE Efficiency Classes

3. Loss Analysis

3.1 Stator Copper Loss

P_Cu = 3I²R

(1)

For CCA-62%: P<sub>CCA</sub> ≈ 1.60 × P<sub>Cu</sub>

创建定子损耗对比图

MEDIA TODO

Figure Fig. 2 Stator Loss Comparison

4. Thermal Considerations

5. Design Modifications

6. Conclusion

CCA is suitable for small motors with lower efficiency classes; high-efficiency motors require careful evaluation.

Frequently Asked Questions

Can CCA be used in motor windings?

CCA can be used in motor windings for lower efficiency class motors (IE1). For higher efficiency classes (IE3, IE4, IE5), CCA's higher resistance makes it difficult to meet efficiency requirements without significant design modifications.

What efficiency impact does CCA have on motors?

CCA-62% increases stator copper losses by approximately 60%. For an 11 kW motor, this typically reduces efficiency from 91.7% (copper) to 89.9% (CCA), a drop of about 1.8 percentage points.

Which IE efficiency classes can CCA motors achieve?

IE1 (standard efficiency) is achievable with CCA. IE2 may be possible with oversized conductors. IE3 and above are very challenging due to stringent efficiency requirements. IE5 is generally not feasible with CCA.

What design modifications are needed for CCA motors?

Using CCA requires larger conductor cross-sections to compensate for higher resistance, more efficient cooling systems to handle increased losses, and potentially redesigned magnetic circuits. These modifications may offset some cost savings.

Figures

创建电机效率等级分布图

Fig. 1 Motor Efficiency Class Distribution

创建定子损耗对比图

Fig. 2 Stator Loss Comparison

Tables

Table 1 Motor Winding Requirements

Requirement	Typical Value	CCA Impact
效率	85-95%	CCA较低
温升	<80°C	CCA较高
使用寿命	20+年	设计得当则相似

Table 2 IE Efficiency Classes

Class	Efficiency (4-pole,11kW)	CCA Feasibility
IE1	87.6%	可能
IE2	89.8%	增大尺寸可能
IE3	91.4%	挑战
IE4	93.0%	非常困难
IE5	94.5%	不可行

Table 3 Loss Budget

Loss Component	Typical %	CCA Impact
定子铜损	30-40%	+60%更高
转子铜损	15-25%	N/A(压铸)
铁损	20-30%	无变化
机械损耗	10-20%	无变化

Table 4 Efficiency Impact Example (11kW)

Winding	Stator Loss	Total Loss	Efficiency
Cu	400W	1000W	91.7%
CCA-62%	640W	1240W	89.9%

References

IEC IEC 60034-30: Motor Efficiency Classes IEC (2020)
NEMA NEMA MG 1: Motors and Generators NEMA (2021)

Authoritative References

ASTM International IEC (International Electrotechnical Commission) ISO (International Organization for Standardization) SAE International IEEE