Lucid’s electrical motors are at the moment the perfect within the electrical automobile enterprise. With much less mass, larger energy density, and higher effectivity than the Porsche and Tesla, the Lucid’s electrical motors produce as much as 670 horsepower whereas weighing solely 67 kilos.
In Lucid’s newest Tech Discuss video, CEO/CTO Peter Rawlinson is joined by Imad Dalala, VP of Powertrains, to deconstruct the Lucid Air’s motor and present what makes it so superior. This is a abstract of the video if you do not have an hour and twenty minutes of free time to observe it.
Earlier than stepping into motor design and manufacturing, Rawlinson tells us about electrical motors and the physics concerned of their transmissions. It is all theta values and radians and clearly to me it is all Greek. In the end the physics lesson offers with the connection between torque and RPM in electrical motors, through which Rawlinson demonstrated that including a gearbox will increase torque on the expense of effectivity and RPM.
Therein lies the problem of designing such a motor, and Dalla remembers this problem from Rollinson’s diagram and his job interview at Lucid. Whereas, sure it is a PR video, it’s good to see the 2 discussing an engineering achievement that they’re very pleased with.
The stator is the principle housing of the motor and stays stationary whereas the rotor rotates inside it. Lucid’s design simplifies conventional stator building by utilizing the time period “fixed wave winding” for the motor’s copper elements, which reduces the variety of laser welds required and aids in effectivity. Rollinson additionally says that the one machine on the earth able to this wave winding is at Lucid’s AMP-1 manufacturing unit, with the whole course of automated by CNC tools.
Warmth is the enemy of effectivity and cooling is extraordinarily necessary. The Lucid makes use of automated transmission fluid to maneuver warmth away from the motor’s copper parts alongside channels positioned subsequent to the wires, as on the outer fringe of the stator, such because the Tesla. The Porsche motor makes use of a water cooling jacket that matches over the stator. Each Porsche and Tesla (known as German and American machines) use typical round copper wire to fill slots of their stators whereas the Lucid makes use of rectangular wire to higher fill the gaps and improve effectivity.
The Lucid makes use of a six-pole rotor able to 20,000 rpm in its motors. The middle of the rotor has been hollowed out and has a four-element planetary gearset, though it’s nonetheless one of many smallest and lightest rotors within the trade. Porsche’s eight-pole rotor is bigger and heavier, rotating at as much as 16,000 rpm, whereas Tesla’s plaid rotor options carbon wrap to advertise mechanical integrity, improve price, and complicate manufacturing.
weight and energy density
Rollinson and Dallala weigh every part to match it with Lucid’s tools, which proves to be lighter than its competitors whereas coming collectively to supply a motor with higher energy density. The outcomes communicate for themselves:
It’s a measure of Lucid’s achievement that their motor holds such numbers towards the one-story marque with the world’s largest EV firm and the would possibly of Volkswagen behind it. As well as, Lucid’s motors are designed, developed and produced in-house to provide the corporate management over each facet and have. Lucid’s know-how is an enormous a part of its worth and for now places it on the high of the EV pack.
This is the complete video:
Photos by Lucid Motors licensed by CC BY 2.0.
James Walker is an automotive journalist at Torque Information, specializing in Lucid Motors. He is if he has wheels, and he is desperate to see what sort of vehicles the EV revolution brings to us. Whether or not it is quick, sluggish, new, or previous, James needs to have a look round it and share it in print and in video, ideally with a number of the twisty roads concerned. You may join with James on TwitterInstagram and LinkedIn.