Drives air‑conditioning compressor. Most new‑energy variants adopt brushless motor with independent speed control for cabin cooling, applied on HEV and BEV air‑conditioning systems.
Top‑10 Global Brands
DENSO, Sanden, Valeo, BorgWarner, Magneti Marelli, Nidec, Panasonic, Mitsubishi Electric, Hanon Systems, Vitesco Technologies. Global Tier‑1 suppliers deliver integrated e‑compressor motor‑compressor assemblies for BEV, PHEV and HEV worldwide.
Top‑10 Chinese Brands
Midea Welling Automotive, BYD Fudi Technology, HASCO‑Sanden, Great Wall Hive Thermal, Songz Automobile Air‑conditioning, Tuopu Group, Yinlun Co., Ltd., Shanghai Guangyu, Guangzhou Wanbao, Jiangsu Lida. Domestic suppliers expand rapidly for new‑energy vehicle thermal‑management market.
Technical Analysis
Structure
Model WQT146 075 is an embedded brushless permanent‑magnet synchronous motor for vehicle air‑conditioning compressor. Key components include permanent‑magnet rotor, stator winding, motor housing, built‑in position sensor, cooling‑lubrication structure. The motor is mechanically integrated with scroll compressor mechanism and matches external drive inverter. High‑voltage DC is inverted into three‑phase AC to drive rotor rotation and realize refrigerant compression cycle.
Application
Drives air‑conditioning compressor. Most new‑energy variants adopt brushless motor with independent speed control for cabin cooling, applied on HEV and BEV air‑conditioning systems.
Manufacturing Challenges
First, high slot‑filling‑ratio stator winding process. Winding insulation must sustain high temperature under high‑speed operation. Second, anti‑demagnetization capability for permanent magnets; magnetic performance shall remain stable under high‑temperature and large‑current impulse. Third, hermetic sealing for motor‑compressor integrated housing to prevent refrigerant leakage. Fourth, high‑speed dynamic balance to suppress NVH noise and vibration. Fifth, insulation‑material chemical compatibility with automotive refrigerant medium. Sixth, strict EMC control to avoid interference with other vehicle ECUs.
Required Quality Documents
IATF‑16949 certificate, APQP documents, DFMEA/PFMEA, control plan, full‑set PPAP, motor performance test report, refrigerant compatibility verification report, NVH noise‑vibration test report, high‑low temperature durability report, EMC compliance report.
Vehicle‑level Performance Impact
Motor efficiency directly determines air‑conditioning power consumption and further influences BEV driving range. Motor failure will disable vehicle air‑conditioning completely. Degraded vibration‑noise performance reduces riding comfort. Speed‑control accuracy determines cabin‑temperature stability.