Channel: WeberAuto

Category: Education

Tags: model xwsu davisteslainduction motorfront drive unitprofessor kellydexron viweber state universityipm-synrmutahweber state automotivejohn d. kellyevlaytonguy in wheelchairelectric vehiclewsumobile shc 629permanent magnet motorev boot campmodel smodel 3front motorweber state university davis campus

Description: Join me for another deep dive to see the details of the 17,500 RPM front motor and drive unit from a 2014-2018 Tesla Model S AWD. See all four motor rotors from the Tesla Model S and Model 3. The video is divided into four sections showing: 1. The motor and gears. 2. The high-performance bearings. 3. The lubrication system. and 4. The electrical system. TIMELINE: 0:00 Start 0:11 Model S, X, and 3 electric motor combinations 1:30 RWD Model S and X motors 1:37 AWD Model S and X motors 1:54 Performance AWD Model S and X motors 2:28 RWD and AWD Model 3 motors 3:10 MUST SEE Close up photos of all four motors 3:44 Video Section 1 - Gears and Rotor 3:56 Gear housing components 4:49 Comparison of differential with a rear performance motor 5:53 MUST SEE Why are the bearings and gears so big? 7:36 The front differential case speed at 250 km/h (155 mph) = 1877 RPM 7:54 MUST SEE Different tire sizes and different gear ratios 9:00 Installation of the front differential case with a 79 tooth ring gear (Prime Number) 9:22 The Counter Shaft with 21 (Factors 3, 7) pinion gear teeth. 79/21 = 3.7619:1 Gear ratio from countershaft to the differential case 10:41 The countershaft speed at 250 km/h (155 mph) = 7063 RPM 11:08 The motor rotor shaft and drive gear with 31 teeth (Prime Number) 11:35 MUST SEE Comparison of the front rotor to the rear performance rotor 12:56 Maximum torque at a vehicle speed comparison 15:36 Motor rotor speed sensor and reluctor wheel 16:15 Special high-speed deep groove rotor bearings from the SKF Group (skf.com) 16:49 MUST SEE SKF Ceramic Bearing (Silicon Nitride) on the rotor 17:43 The rotor is in a wet environment and cooled by the transmission fluid 18:33 MUST SEE Rotor shaft grounding rings with conductive filaments from (AEGIS?) 19:37 Shaft grounding protects bearings from damage from electrical current 20:10 The Rotor Shaft with 31 gear teeth drives the 77 (Factors 7, 11) tooth counter gear. 77/31 = 2.4839:1 Gear ratio. 20:52 See all three gears in the reduction gearbox with an overall gear reduction of (79/21) x (77/31) = 9.3441:1 21:26 The differential and the axle half shaft and jackshaft to reduce torque steer 22:23 Video Section 2 - Specialized Bearings 22:58 How Tesla run bearings at higher speeds than their limiting speeds with lubrication 23:07 Video Section 3 - Specialized Lubrication for bearings 23:34 The 20 tooth oil pump gear is overdriven by the differential ring gear 20/79 = 0.2531:1 gear ratio (3.95 times faster than the ring gear) 24:18 The transmission fluid drain and fill plugs 24:39 The fluid refill procedure 25:45 MUST SEE The proper fluids for the front-drive unit (Mobile SHC 629 and Dexron VI) 28:00 The path of the pressurized transmission fluid to six destinations 28:09 1. Lubrication and cooling to the motor gear and conductive bearing 29:08 2. Through the fluid-to-coolant heat exchanger to remove or add heat 31:04 3. Cool fluid is sprayed on the stator frame and right side windings for cooling through a sparge pipe 32:24 4. Cool fluid is sprayed on the non-conductive bearing and the right side of the rotor 32:58 5. Cool fluid is dripped on the stator frame and left side windings 32:47 6. Cool fluid is sprayed on the left side of the rotor 33:48 Transmission fluid fill capacities 34:42 Video Section 4 - Electrical Components 34:50 MUST SEE The three-phase, four-pole, 48 slot stator 35:55 The milli-ohm resistance of the stator windings with a Hioki RM3548 Resistance Meter 36:48 High-Performance induction motors versus high-efficiency Internal Permanent Magnet Synchronous Reluctance Motors (IPM-SynRM) 39:30 The inverter and its connection to the stator 41:42 The stator temperature sensor 42:40 How the stator frame is mounted with the stator housing 45:02 Additional EV training opportunities at weber.edu/evtraining 45:18 Thank you for your donations ABOUT US Weber State University (WSU) Davis Campus - Automotive Technology Department - Advanced Vehicles Lab. A technical description and operational demonstration of the Tesla Model S Front Drive Unit (FDU). We teach current vehicle technologies to our automotive students at Weber State University and online. For more information visit: weber.edu/automotive This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see weber.edu/automotive/J_Kelly.html Visit my other youtube channel youtube.com/user/vibratesoftware to see the amazing NVH app for vibration diagnosis! ADDITIONAL TRAINING FOR YOU Join us for hybrid and electric vehicle training with two online courses and in a 5-day on-campus boot camp with Professor John D. Kelly. See weber.edu/evtraining DONATE TO OUR DEPARTMENT Please consider a donation to the Department of Automotive Technology at Weber State University here: advancement.weber.edu/Automotive