Engineers reinvent the 5,000-year-old gear using fluids instead of solid teeth.

AC induction motors are everywhere, from ceiling fans to vehicles. They’re reliable, simple, and rugged — but there are some disadvantages. It’s difficult to control the speed ...

Internal-combustion engines are making impressive strides in rotational speed. The Lamborghini Temerario has a 4.0-liter twin ...

Abstract: The stability in both low-speed range and high-speed range are one of the major challenges of sensorless induction motor drives. This article proposes the wide-speed range stability solution ...

Archer Aviation (ACHR) announced an exclusive collaboration with Karem Aircraft to give it access to the key advanced, military-grade rotor and tiltrotor technologies for integration into the ...

Karem developed an optimum-speed tiltrotor concept for an uncrewed aircraft in 2014 under DARPA’s VTOL X-Plane project. Credit: Karem Aircraft Archer Aviation is to use Karem Aircraft’s optimum-speed ...

What if a single innovation could redefine how we think about electric motors, making them not just marginally better but insanely efficient? Imagine an electric vehicle (EV) that accelerates with ...

For years, automakers were reliant on 6-speed transmissions. However, they began to adopt 8-speed replacements, following pressure from the government to meet new environmental regulations. When the 8 ...

The legendary Mazda 787B with its 9,000rpm R26B 4-rotor engine captured at the Goodwood Festival of Speed. Featuring launches, revs, and accelerations with authentic rotary sound from Mazda’s Le ...

Abstract: Accurate rotor speed estimation is significant for achieving high-performance control in sensorless induction motor drives, especially under dynamic and low-speed operating conditions. This ...