Home
Global Supplier Directory
APPLIANCE Engineer
Supplier Solutions
APPLIANCE Line
Whitepaper Library
Calendar of Events
Association Locator
Contents Pages
Market Research
Subscription Center


 
   
issue: March 2008 APPLIANCE Magazine

Motor Technology
Minimotor


 Printable format
 Email this Article
 Search

A new compact motor is designed to meet the demand for small drive solutions in medical and consumer electronic applications.

The M10A minimotor from Elliptec AG (Dortmund, Germany) is said to offer engineers highly dynamic and precise movement in a small package. Designed for rotary as well as linear applications, the motor can be installed in gearless drives without the need for a transmission of any kind.

According to Christian Stromberg, technical support, the core element of the M10A motor is the low-voltage piezoactuator. “By optimizing the vibrancy behavior of aluminum frames, a new shape with reduced size was developed for the piezoactuator to be operated in resonance,” he explains. “This allows for novel designs that couldn’t be realized before due to size or precision limitations of conventional motors.”

Measuring approximately 13 × 12 × 2.5 mm, the motor has a flat surface. While conventional motors usually have nearly equal dimensions in height and width, Stromberg says the depth of the typical motor is usually “a multiple of these dimensions.” He adds, “The orientation of the oscillation has been rotated by 90 degrees. As a result, the M10A features a flat form factor and requires no lever arm.”

Stromberg says one of the motor’s key features is precision. “The engine is driven by a signal with a frequency between 128 and 155 kHz, while its typical average speed is about 500 mm/sec, resulting in a calculative single step width of about 3 to 5 μm,” he says. “By usage of pulse-width modulation (PWM), the step width can be reduced even further. In addition to that, the motor does steps with a width of below 1 μm in the beginning of acceleration, which can be used in conjunction with small signal pulses to address submicron steps.”

Also, because the motor’s maximum speed can be adjusted by software, there is no need for a gearbox, eliminating gearbox wear and noise generation.

The motor is controlled by a simple electrical circuit that Stromberg says can be easily integrated into existing microcontroller environments. “Even basic controllers can generate frequencies with the minimally required resolution of 1 kHz (preferably 300 Hz),” he says. “Many even include a timer or a PWM unit so that the computation power is barely affected. Alternatively, analog circuits may be used as well.”

The new motor is said to be ideal for high-precision applications such as portable medical and consumer electronics products. One possible application is an electronic-controlled aperture used in professional tilt-shift lenses for perspective eye correction. “Due to the nature of these lenses, a mechanical linked solution is usually not practical because of the otherwise necessary high complexity to allow aperture operation during tilt and shift,” Stromberg says. “The small size of the M10A allows driving the aperture from within the lens. Its electronics remain in the camera body, using the electronic contacts of the camera mount for communication instead of a mechanical link. As exact light exposure depends on accurate aperture opening, the M10A provides the needed high-precision positioning and offers high-dynamic movement to allow for short blackout times while stopping the aperture down and back open.”

www.elliptec.com
 

 

Daily News

...........................................................

Oct 30, 2014: Whirlpool Corp. reports strong third-quarter

Oct 30, 2014: Statistical Portrait of the European Appliance Industry Released by Appliance Magazine

Oct 30, 2014: New Whirlpool acquisition Indesit reports profit for year so far

Oct 30, 2014: Consumer Confidence Index rebounds in October

Oct 29, 2014: New home sales up slightly in September 2014

More Daily News>>

RSS Feeds
.........................................................
Appliance Industry
Market Research

...........................................................

October 2014: Portrait of the European Appliance Industry
September 2014: Appliance Industry Focus: HVAC
June 2014: Appliance Magazine Market Insight: April 2014
May 2014: Appliance Magazine Market Insight: March 2014




 
Contact Us | About Us | Subscriptions | Advertising | Home
UBM Canon © 2014  

Please visit these other UBM Canon sites

UBM Canon Corporate | Design News | Test & Measurement World | Packaging Digest | EDN | Qmed | Plastics Today | Powder Bulk Solids | Canon Trade Shows