MOTION CONTROL: Koford Engineering LLC has introduced a new line of 22-mm slotless brushless motors that offer the highest power density and efficiency in their class. They are available in two- and four-pole designs and with hall sensors or sensorless with power outputs 0.7 to 430W, speeds from 2,600 up to 201,600 rpm, and efficiencies up to 92 percent. Autoclavable and non autoclavable versions are available. The slotless design eliminates cog for more accurate positioning in medical robotics applications and provides cool operation at high speeds for surgical and dental tools. The four-pole configuration doubles the resolution for hall feedback speed control, improving speed resolution and servo performance for applications that do not use encoders due to space or cost constraints. Windings can be customized to customer requirements and shafts can be modified. Cannulated shafts are available. Matching High efficiency/high frequency hall and sensorless drives which do not require external inductors are also available. These can be custom programmed to user requirements. Applications include orthopedic and other surgical tools, dental hand pieces, pumps, blowers and surgical robots.
During a teardown of the iPad Air and Microsoft Surface Pro 3 at the Medical Design & Manufacturing Show in Schaumburg, Ill., an engineer showed this "inflammatory" video about the dangers of maliciously mishandling lithium-ion batteries.
Science fiction author Isaac Asimov may have the best rules for effective brainstorming and creativity. His never-before-published essay, "On Creativity," recently made it to the Web pages of MIT Technology Review.
Much has been made over the potentially dangerous flammability of lithium-ion batteries after major companies like Boeing, Sony, and Tesla have grappled with well-publicized battery fires. Researchers at Stanford University may have come up with a solution to this problem with a smart sensor for lithium-ion batteries that provides a warning if the battery is about to overheat or catch fire.
In this new Design News feature, "How it Works," we’re starting off by examining the inner workings of the electronic cigarette. While e-cigarettes seemed like a gimmick just two or three years ago, they’re catching fire -- so to speak. Sales topped $1 billion last year and are set to hit $10 billion by 2017. Cigarette companies are fighting back by buying up e-cigarette manufacturers.
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