Raytron Technical Review RESEARCH ARTICLE cca-motor-windings

CCA电机绕组效率考量

CCA in Motor Windings: Efficiency Considerations

RAYTRON技术团队¹ *

¹RAYTRON集团技术研究中心, 中国

^*通讯作者

收稿: 2025年12月接受: 2026年2月发布: 2026年3月

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

1. 引言

1.1 电机绕组要求

1.2 CCA可行性

创建电机效率等级分布图

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Figure Fig. 1 电机效率等级分布

2. 电机效率标准

2.1 IE效率等级

3. 损耗分析

3.1 定子铜损耗

P_Cu = 3I²R

(1)

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

创建定子损耗对比图

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Figure Fig. 2 定子损耗对比

4. 热考量

5. 设计修改

6. 结论

CCA适用于低效率等级的小型电机，高效率电机需要仔细评估。

常见问题

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.

图表

创建电机效率等级分布图

Fig. 1 电机效率等级分布

创建定子损耗对比图

Fig. 2 定子损耗对比

表格

Table 1 电机绕组要求

要求	典型值	CCA影响
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效率等级

等级	效率(4极,11kW)	CCA可行性
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 损耗预算

损耗组分	典型%	CCA影响
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 效率影响示例(11kW)

绕组	定子损耗	总损耗	效率
Cu	400W	1000W	91.7%
CCA-62%	640W	1240W	89.9%

参考文献

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

权威参考链接

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