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Stepping motors combine small size, high torque

Posted: 27 Jun 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Seiko? SII? SMM? stepping motor? SSM-4029?

Super small stepping motors

Seiko Instruments (SII) has announced the release of the SSM "state-of-the-art" super small stepping motor series. The company said the SSM series stepping motors combine an extremely small sizes with high torque performance. The new motors have been reduced in size to as small as 2.9mm in length with a diameter of 4mm.

As consumer demand for compact portable devices including digital cameras and cell phones equipped with camera functions has boomed, the need for smaller and smaller stepping motors has increased dramatically. At the same time, device manufacturers continue to require extremely high performance including parameters like step angle resolution and motor torque. Achieving dramatically reduced motor size while increasing the motor's performance has been a significant challenge both for device manufacturers and their suppliers.

SII said it was able to successfully meet this challenge through the use of an optimized magnetic circuit design, an advanced mechanical design utilizing precision parts, and by adapting special proprietary techniques in the terminal design to avoid reducing the coil volume.

The resulting motor volume was reduced to 0.036cm3. This extremely small size enables the SSM series motors to assist device designers and manufacturers in their goal to shrink the size of mobile phones, digital cameras and other similar portable consumer devices.

The SSM-4029 has dimensions of 4-by-2.9mm while SSM-4049 has 4-by-4.9mm. The products have a resolution of 18 degrees. The come in RoHs-compliant packages.

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