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Tiny piezo motor runs over 7mm/s at low power

Posted: 28 Jan 2010 ?? ?Print Version ?Bookmark and Share

Keywords:motor control? driver chip? piezo motor? ASIC?


From New Scale Technologies Inc. comes the SQUIGGLE RV reduced voltage linear drive system, which consists of a SQL-RV-1.8-6-12 SQUIGGLE motor and NSD-2101 drive ASIC. The new motor delivers performance comparable to much larger motion control systems at 40 percent lower power and less than one-fourth the size.

The Squiggle RV is the claimed to be the first miniature piezo motor drive solution with a driver chip that is smaller than the motor and driven directly from battery power as low as 2.3Vdc without the need for a voltage boost.

The new motor uses multi-layer piezo technology from TDK-EPC to reduce the input voltage requirements of this tiny motor, which measures 2.8mm x 2.8mm x 6mm.

The NSD-2101 driver was developed in partnership with austriamicrosystems using advanced integrated circuit designs and patented control systems. The smart IC measures only 1.8mm x 1.8mm and drives the SQUIGGLE RV motor directly, without the need for an external boost circuit.

The NSD-2101 accepts direct 2.3Vdc to 5.5Vdc battery power and uses patented full-bridge switching technology to create the ultrasonic motor drive frequency.

The IC also has patent-pending smart drive features built in that optimize motor performance while minimizing power consumption over a broad range of operating and environmental conditions.

The NSD-2101 requires only DC battery power and digital I?C control commands to achieve unrivaled miniature motion control performance.

The SQL-RV-1.8 motor achieves forces in excess of 50g and high resolution to 0.5?m.

The motor can run at speeds greater than 7mm/s with power consumption of less than 350mW when moving under typical loading conditions. This corresponds to a DC current of only 120mA for a typical 3Vdc battery.

A unique self-locking design means that zero power is needed to hold the motor position, providing additional power savings.

New Scale's TRACKER NSE-5310 linear encoder can be integrated with the SQUIGGLE RV system for high system repeatability with submicron resolution.

The reduced voltage SQUIGGLE RV micro motor is targeted for applications where high precision, miniature size and low power consumption are a must. These include medical, security, optical and imaging systems; consumer electronics; precision biomedical actuators; and miniature actuation for aerospace and industrial applications. Its small size makes it ideal for creating tiny, high resolution integrated closed-loop motion systems.

New Scale's DK-RV-1.8 series developer kits include all hardware as well as New Scale Pathway development software with scripting capabilities in a convenient, plug-and-play reference design for prototype development and integration.

Open-loop developer's kits contain an SQL-RV-1.8 micro motor and NSD-2101 driver; closed-loop kits also include a New Scale TRACKER NSE-5310 linear encoder.

Developer's Kits are available from New Scale distributors and at the company Website starting from $495.

- Toni McConnel

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