Tesla(US:TSLA) 芯世相·2025-09-02 06:49Core Viewpoint - The article provides an in-depth analysis of Tesla's fourth-generation drive unit, highlighting its evolution from the previous model with significant optimizations in design, cost reduction, and performance improvements [5][19]. Overall Structure and Layout - The fourth-generation drive unit maintains a similar overall layout to its predecessor but features comprehensive optimizations for a more compact design. Key components include the inverter, cooling system, oil pump, heat exchanger, gearbox, and motor [5]. Key Component Analysis - The inverter design is now more compact and regular, utilizing integrated casting and a new cooling component connected through innovative friction stir welding technology, optimizing material and fastener usage [10]. - The motor layout is similar to the previous version but has been optimized for weight reduction. The stator now features a new hairpin design, enhancing efficiency and reducing production costs by automating the manufacturing process [10]. - The drive unit includes a permanent oil filter integrated into the housing, designed to last the vehicle's entire lifecycle without replacement, filtering out wear debris and manufacturing impurities [10]. Inverter Circuit Board and Safety Features - The inverter's PCB design has been significantly optimized for compactness, introducing a thermal disconnect device for rapid fault response and a 10,000-amp interrupting current fuse for immediate load handling [14]. - The core control chip remains the Texas Instruments TMS320 dual-core DSP, with the addition of a custom chip for safety functions. New infrared sensors are employed for non-contact temperature detection, improving upon previous contact-based methods [14][18]. Summary of Innovations - The fourth-generation drive unit represents a significant evolution from its predecessor, achieving a more compact structure and lower production costs while enhancing performance and reliability. Innovations such as the hairpin stator, improved cooling system connections, and new temperature detection methods reflect Tesla's ongoing exploration and advancement in electric drive technology [19].