Case Studies

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Designing an In-Hub Brushless Motor

Article for Machine Design Magazine Lowell Christensen, Founder and VP of Engineering TruTech Specialty Motors Motors that are built into the hub of a wheel can offer many advantages to mobility applications. These can range in sizes from small over the road vehicles down to mobility scooters. The main reason […]

Open Source Motion

Over three decades I’ve been a part of the evolution that has combined the microcontroller with power electronics. Over that time, motor drives have evolved into building blocks, however they have become “black box” building blocks. While they may use standard communication protocols such as Rs485, Ethernet or Can, each […]

Motion and the “Internet of Things”

The “Internet of Things” as defined by Kevin Ashton in 1999 was “to empower computers with their own means of gathering information, so they can see, hear and smell the world for themselves, in all its random glory”. In 2008, SRI Consulting Business Intelligence expanded the concept and charted a […]


Have you ever found yourself troubleshooting an application at a remote site but without the necessary tools available? I learned a long time ago that the scout motto of “Be Prepared” applies to fieldwork as well. Back then, this involved dragging a suitcase with oscilloscope, bulky isolated probes, a “luggable” […]

The Nearest Exit May Be Behind You

One of my hobbies is the History of Technology. As I travel, I’ll visit nearby historical sites that have a tie to technology. What fascinates me about these sites is how our math, science and engineering predecessors tackled the challenges of the day and mastered them working only with what […]

Scotty… I Need More Power!

If you are a geek like me and are ever in Detroit, don’t miss the automakers’ museums. The sheer size of the Ford museum is astounding. It even includes a working late 19th century factory, complete with steam engine, overhead shafts and belt and pulley drives to the machine tools. […]

Off Grid Mission Focused Electric Motion

As engine driven hydraulic and pneumatic applications migrate to electric motion, the concept of designing the entire system to meet mission requirements becomes important. Using recent developments in 1 to 10Kw power conversion, it is now possible to design the motion system to the optimum operating voltage for the application […]