A View from Kevin Bullis
Hybrid Formula Race Showcases the Electric Drive
Students invent new ways to use batteries and ultracaps to improve race cars.
This week college students gathered at the New Hampshire Motor Speedway to race “formula” style, open-wheel, open-cockpit cars that they had built over past several months. The cars are hybrids–gas or diesel powered and boosted by jolts of electricity from ultracapacitors, batteries, or both–and can hit 75 miles per hour in as little as 4.6 seconds.
The competition, started in 2006 by Dartmouth College’s Thayer School of Engineering, gives a glimpse of the possibilities of electric drive, which can throw cars forward with instantly available torque. In comparison, conventional gas engines seem sluggish and unresponsive.
The team from Brigham Young University brought a “family-friendly” sports car that could be easily programmed to limit the power and top speed, depending on who is driving it, at the flip of a switch. The University of Manitoba team is patenting its design, which includes a new transmission system with two electric motors. This system allows the car to capture different amounts of energy from the inner and outer wheels to smoothly slow the car when it goes into turns, and delivers different amounts of power to the wheels to speed them out of turns. It can also use all of the two electric motors’ instant torque with a high initial gear ratio of 12.5 to 1. (It’s called a “continuously variable planetary gear transmission”.)
Joshua Campbell from the University of Manitoba, points to the continuously variable planetary gear transmission that he invented. It allows independent gear ratios for each wheel to help in turns.
Curbing emissions isn’t enough—we need emergency solutions for climate change
Top energy scientist Daniel Schrag says we have to adapt and innovate, because we’re already signed up for centuries of higher global temperatures.
Why lithium-ion may rule batteries for a long time to come
Materials scientist Gerd Ceder is overseeing a research effort to extend the capabilities of the dominant form of energy storage, using a new class of compounds.
How California could affordably reach 100 percent clean electricity
Depending on solar and wind without nuclear, carbon capture, or other “firm low-carbon resources” would be extremely expensive, MIT researchers find.