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Welcome to this chilly February edition of Electric Motors Monthly. To help warm things up, let's talk about a few hot topics in the electric car arena.
Toyota Motor Corp., the maker of the Prius hybrid, is working on a new type of electric motor. The new design aims to lower costs and reduce Toyota's dependence on rare earth metals, lessening its reliance on China, producer of 97% of the rare earths used in modern hybrids and other high-tech motor applications. No time line has been given for the new motor.
For a really hot car, engineers at Jaguar Cars Ltd. took a truly innovative approach when designing their 75th anniversary C-X75 concept car. The two-seater’s hybrid drive uses a 145-kW (195-hp) hub motor in each wheel, giving the car four-wheel drive. A floor-mounted lithium-ion battery pack delivers 19.6 kW-hr, for an all-electric range of 68 miles. But most noteworthy is the pair of micro gas turbines that burn gasoline, natural gas, diesel, or biofuel. Each 80,000-rpm turbine spins a generator that recharges or augments the batteries extending the C-X75's range to 560 miles. The battery pack can be recharged using household current in 6 hr. Not bad for an electric vehicle that goes 0 to 62 mph in 3.4 seconds!
-- Bob Repas, Assoc. Editor
In this issue of Electric Motors Monthly:
Let us know what's happening in your area via the MACHINE DESIGN Blogs, LinkedIn, Twitter, and Facebook accounts, or visit the virtual MD Office in Second Life.
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The Racing Green Endurance project wants to prove the perceived limitations of electrically powered vehicles (EVs) — slow speeds and a limited range — don’t have to be the case. So they created a new class of race car with thoughts of making it the world’s most fun-to-drive, alternative-powered vehicle while pushing the boundaries of EV technology.
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Brushed Motors from Dynetic Systems
| Our Brushed DC Motors, in sizes 1.5”, 2.25” and 3.125” diameters, offers high performance, cost effective motors that can be shipped to the customer in three weeks.
Our MS models are rated for speeds up to 426 Watts and continuous torques up to 160 oz-in. Application specific speed and torque ratings are also available. Additional options will permit you to use these units in a wide variety of situations.
Visit our website to request a copy of our new catalog and to see some examples.
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When selecting a stepmotor for a medical device, engineers need to consider many factors. For example, a systolic pump may require accuracy in a small package while lab devices, such as a blood sampler, may need to be exceptionally quiet. Although requirements for stepmotors vary from device to device, there are several factors that should always be considered.
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Fractional horsepower motors (FHPs) are found in a variety of devices, including refrigerators, vacuum cleaners, washing machines, and coffee makers. And they share a common feature: They create noise. So manufacturers of FHPs are paying as much attention to reducing noise, vibration, and harshness (NVH) as they do to cost competitiveness and energy efficiency.
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Putting motion into art requires a different approach to motion control than typical machine-tool applications. Although hardware elements such as actuators, servomotors, and controllers are similar, the approach to motion in artistic endeavors is typically quite different. In contrast to industrial applications, artistic motions are often only roughly defined while the art piece or lifelike creature is being designed. The artist then experiments to make the motions look natural and bring them to “life.”
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Not many pieces of equipment operate well at –199°F, but telescope mounts at Concordia Station in Antarctica happen to be one of them. Credit for this goes, in part, to the coreless servomotors that position the telescope.
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Jeramè Chamberlain of Nippon Pulse America looks at what goes into prototyping a motion control system. Length: 6:00
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Todd Toresdahl explains how Cirque du Soleil wants to hire qualified engineers. Length: 5:30
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The Series 2232/2250...BX4 CSD/CCD 22-mm compact drive features a single-axis integrated motion controller. The four-pole brushless controller is available with a RS-232 serial or CAN interface. The drives come with the complimentary Faulhaber Motion Manager 4.4 software.
MICROMO
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The Series 7EC spring-set, electrically released caliper brake is for dynamic stopping, E-stop, and holding applications. The brake has a floating caliper, and the disc can mount directly to a driveshaft, bolt to a coupling hub, or fit to an extended shaft on a motor’s accessory end.
Rexnord Industries LLC, Stearns Div.
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The new, ready-to-install MSC-EL mini-slide with integrated electrical drive reduces the time required to plan, install, and start up customized handling systems. Two sizes are available — the MSC-EL-12 and MSC-EL-16. The units can be ordered in standard lengths and are capable of travel to any position from 50 to 150 mm.
Bosch Rexroth AG
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The MDrive Ethernet system features an integrated motor, drive and fully programmable controller, with standardized IP addressing system. This allows up to 255 devices on a network while eliminating the complicated wiring and software configuring of multidrop systems using RS-422/485 communications.
IMS Schneider Electric Motion USA
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Understanding Pneumatic Technology:
Do's & Don'ts for OEM Applications
Sponsored by: Norgren
Date: March 16th, 2011
Time: 2:00pm ET
Many OEM projects require some type of motion. Pneumatic technology is audited as a possible technical solution, but understanding the capabilities and limitations is the key to moving forward without technical delays. Norgren’s Engineering Advantage team is presenting a webcast on the top Pneumatic Dos & Don’ts for OEM applications.
The course will include:
Best Practices and Design Pitfalls/Caveats
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The webcast will give attendees the knowledge to retool current projects, adjust designs to changing specifications, and make better technical decisions in the future.
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ARCHIVED WEBCASTS AVAILABLE FOR FREE VIEWING
Click Here for a list of archived Machine Design webcasts.
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DYNETIC SYSTEMS
Integrated brushless gearmotor, incorporating gearing into the body of the DC motor, improves efficiency while reducing size and noise levels.
www.dynetic.com
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