Tesla’s Choice: AC Induction Motors vs. DC Motors
Tesla uses AC induction motors because they have more torque even at high speeds, a simpler design, cost less, do not need rare earth metal permanent magnets, have high reliability, and allow easier regenerative braking. AC induction motors are more efficient, lighter in weight, and have higher power density compared to DC motors.
Nikola Tesla’s AC Motor Revolution
Nikola Tesla invented the induction motor in 1887, which ran on alternating current (AC) and had a rotating magnetic field. It was lighter, simpler, cheaper, and more reliable than direct current (DC) motors. Tesla’s designs revolutionized long-distance transmission of electricity using AC current and impacted industries needing reliable machine drives.
The Advantages of AC Induction Motors
Two reasons Tesla vehicles use AC induction motors: Mechanical/electrical features and torque-speed characteristics. Induction motors have advantages such as avoiding brush replacements, reducing fire risks from sparks, and utilizing rotating magnetic fields for torque. Elihu Thomson built the first AC motor in 1886, but Tesla’s 1888 patented design proved to be the most practical.