[Objective] This paper focuses on the innovative applications of additive manufacturing (3D printing) in the field of electric motors

aiming to provide theoretical support and practical references for the development of high-performance motors. [Methods] Firstly

the additive manufacturing technology is elaborated from aspects such as industry background

process principles

technical systems

and competitive advantages. Then

its innovative applications in key motor components

including stators

rotors

permanent magnets

windings

and cooling structures

are systematically reviewed to clarify its cutting-edge development directions. Finally

the trends and current challenges of additive manufacturing in motor manufacturing are deeply analyzed. [Results] By 2023

the global 3D printing market value has exceeded $15 billion

with a compound annual growth rate of over 20%. In recent years

researchers have analyzed the materials adaptability such as high-temperature alloys

composite magnetic powders

and conductive polymers using mainstream processes like laser powder bed fusion and binder jetting

while identifying technical bottlenecks in precision

surface roughness

and post-heat treatment. [Conclusion] Additive manufacturing technology

with its unique layer-by-layer deposition principle and design freedom

has brought comprehensive transformations to the motor field

ranging from material preparation to system integration.