KB Electronics now sells two battery-powered speed controllers … dc/dc low-voltage motor speed controls. The KBBW Series of pulse-width-modulated (PWM) dc/dc motor speed controls respond dynamically to load variations. PWM produces an almost pure dc current to the motor for low noise and long brush life. Pulse-by-pulse current limit provides short circuit protection and prevents control […]
DC Motors
New trends in electric motors: Efficiency, power density, torque
If there’s one trend that’s prevalent in motors of all kinds, it’s the theme of increasing performance, more specifically a trio of highers: higher efficiency, higher power density and higher torque density. These are incremental improvements in motor performance that are at least partly driven by the Department of Energy (DOE) energy efficiency requirements, said […]
Better ways to commutate BLDCs — with capacitive sensing
By Jeff Smoot, VP Motion Control, CUI Inc. Capacitive commutation can speed up the assembly of brushless dc motors and be more accurate than conventional Hall sensors. Examine a cordless power tool or a computer hard drive and you’ll likely find a brushless dc motor (BLDC) doing the work. BLDCs have become widely used in recent […]
Right-angle spiroid gearheads: New options and uses
maxon precision motors now makes right-angle gearheads for maxon’s 22-mm and 32-mm dc motors. These high-torque gearheads transmit power at 90° in the smallest possible form factor (thanks to spiroid technology). Other features: • Quiet operation and high torque transmission • High stiffness and low deflection with large applied loads • Back-drivable (4:1 ratio) and non-back drivable (31:1 ratio) […]
Choosing a brushless DC motor driver
By Chris Francis Brushless DC motors (BLDC motors) are quite different to drive compared to brushed DC motors. With a brushed DC motor you simply apply a voltage or pulse width modulated voltage and the motor will start turning (if possible) and increase speed with reducing torque until the torque/speed match the load. A brushless […]
A First in Space History – Rosetta Space Probe Lands on Comet after Ten Years of Travel
At the end of May 2014, the Rosetta space probe moved into an orbit around the comet 67P/Churyumov-Gerasimenko in order to, map its surface and prepare for the landing of Philae. This ballistic lander, weighing 100 kg, landed successfully on the comet on November, 12th 2014. The probe is powered by FAULHABER DC motors to […]
Tried-and-true chain lift and motor technology makes Cedar Point’s Gatekeeper roller coaster soar
Reliability. Longevity. Simplicity. Those are just a few of the key words that come to mind when you learn why Cedar Point, a world-famous amusement park located in Sandusky, Ohio, went with tried-and-true chain lift technology on its winged roller coaster, the Gatekeeper. For the first installment in Design World’s Summer Tech Vacation video series, […]
BLDC motor EC 19 and planetary gearhead GP 19 M
With its modular construction, this new brushless DC motor is available in three performance classes: the cost-optimized EC 19 at 60 Watt, the strong and high-speed EC 19 at 120 Watt and the sterilizable high-end version EC 19 at 120 Watt. The internals of the drives are responsible for their individual characteristics: The EC 19 […]
DMC-40×0 and DMC-41×3 Have Twice The Program Memory
Galil is pleased to announce our latest firmware release, revision 1.2, for the DMC-40×0 and DMC-41×3. This release provides an increase in program memory from 2000 x 80 characters to 4000 x 80 characters, and an increase in the total array elements from 16,000 to 24,000. The DMC-40×0 comes in a box-level format and delivers […]
Athlonix™ 22NT Brush DC Motors
Portescap introduces the 22NT Athlonix Brush DC Miniature motor. The new 22NT motors offer excellent power-to-weight ratio, ensuring high battery life while providing high power up to 12.7W. This enables OEMs to build smaller, lighter, and higher performing machines and devices. This robust motor eliminates the need to choose between compact size and weight or […]
