Abstract：In the context of China′s "carbon peaking and carbon neutrality goals"，the electrical equipment

manufacturing industry urgently needs a low-carbon transition. As a key component of electrical equipment，

variable-frequency drive（VFD）devices offer significant advantages such as precise regulation，notable energy

savings，flexible control，and excellent equipment protection. These attributes make VFDs highly valuable in

industrial automation and energy efficiency management. However，the industry currently lacks technical

parameters for low-carbon evaluation that align with the functional contributions of these products.The concept of

carbon efficiency ratio（CER）was introduced through a case study to illustrate its application in the low-carbon

evaluation of electrical equipment. For accurate and comprehensive assessment，the carbon footprint of products

was calculated using a cradle-to-grave life cycle approach.By comparing CER data of VFD devices of different

specifications and various types of electrical equipment，it was demonstrated that a lower CER indicates lower

carbon emissions for the same functional contribution，thus reflecting higher low-carbon performance. The

introduction of the CER concept enables more accurate evaluation of the low-carbon performance of VFD products，aids in establishing low-carbon evaluation standards for the industry，and facilitates the electrical equipment industry's achievement of the "dual carbon" goals，while also providing insights and references for low-carbon transitions in other industries.

      Key words：carbon efficiency ratio（CER）；electrical equipment；variable-frequency drive（VFD）；low-carbon assessment；carbon footprint

     Format Citation:马梦媛，王阳，王连杰,等. 碳效比在变频调速设备低碳评价方法中的应用[J].电气传动,2026,56(06):91-96. MAMengyuan，WANG Yang，WANG Lianjie,et al. Application of carbon efficiency ratio in low-carbon evaluation method of variable-frequency drive [J].Electric Drive, 2026,56(06):91-96