Used for auxiliary on board mechanisms such as window lifters, wipers, seat adjusters and water pumps. Includes brushed DC motor and brushless DC (BLDC) motor.
Top‑10 Global Brands
Bosch, Valeo, DENSO, Nidec, Magna, Hanon Systems, Continental, BorgWarner, Panasonic, Mabuchi Motor. These global suppliers provide brushed‑DC and BLDC motors for automotive auxiliary actuators, covering window lifter, wiper, seat adjustment and water‑pump applications.
Top‑10 Chinese Brands
Zhejiang Topband, Changzhou Xingyu, Shanghai Hugong, Ningbo Shuanglin, Wolong Electric, Founder Motor, Changzhou Yuyang, Jiangsu Hengli, Zhejiang Huagong, Guangdong Kaizhong. Domestic suppliers deliver cost‑competitive automotive DC motors for local OEMs and global aftermarket projects.
Technical Analysis
Structure
Automotive DC motors include brushed DC motor and brushless DC (BLDC) motor. Brushed DC motor consists of stator permanent magnet, rotor winding, commutator, carbon brushes, bearings and housing. BLDC motor contains permanent‑magnet rotor, stator winding, Hall‑effect position sensors and drive PCB. Most vehicle‑applied DC motors are assembled with reduction gearbox for torque output.
Application
Used for auxiliary on‑board mechanisms such as window lifters, wipers, seat adjusters and water pumps. Includes brushed DC motor and brushless DC (BLDC) motor.
Manufacturing Challenges
For brushed DC type: matching performance between carbon‑brush and commutator; spark‑level control and service‑life improvement. For BLDC type: winding‑process quality and Hall‑sensor assembly precision. Gearbox noise and long‑term fatigue durability are key challenges. Insulation materials must resist thermal ageing under wide‑temperature environment. Mechanical structure needs high robustness against vehicle road vibration. EMC suppression is required to avoid disturbing vehicle CAN bus communication.
Required Quality Documents
IATF‑16949 certification, APQP documents, DFMEA/PFMEA, control plan, full‑set PPAP, service‑life durability report, noise‑performance test report, high‑low temperature & vibration validation report, EMC compliance report.
Vehicle‑level Performance Impact
DC motors serve as auxiliary actuators. Motor failure directly causes loss of corresponding functions including window lifting, wiper sweeping, seat adjustment or cooling‑water pump operation. Abnormal noise and jitter degrade vehicle NVH performance. Cooling‑pump DC‑motor malfunction leads to abnormal thermal dissipation for ICE or EV three‑electric system and triggers over‑temperature protection logic.