Commutation encoder reduces assembly time on BLDC Motors

8th October 2014

Same Sky

Staff Reporter

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Datasheet

A next-generation modular encoder series is now available from CUI Devices. The AMT31 series, using a capacitive code generation system coupled with a proprietary ASIC, generates standard U/V/W commutation signals for vectoring current to brushless motors. The technology employed allows the device to be particularly well suited to brushless dc motor applications subject to vibration and contaminants.

Delivering accuracy figures of +/- 12 arcmin (±0.2 mechanical degrees), the series allows for significant time saving during the motor installation process thanks to the incorporated One Touch Zero feature. Installing a commutation optical encoder onto a brushless dc motor (BLDC) can be an iterative and time-consuming process. The AMT, being ASIC and MCU based, reduces this time consuming process to a few seconds via the One Touch Zero feature, saving time and cost during the manufacturing process.

The commutation output can accommodate brushless motors with 2, 4, 6, 8, 10, 12 or 20 pole pairs, selectable from the factory or via CUI Devices' AMT Viewpoint GUI. The AMT31 also offers supplementary incremental A, B, and Z channels for various servo positioning and startup sequences. 20 programmable resolutions are available with a range of 48 to 4096 PPR, again adjustable at the factory or via CUI Devices' AMT Viewpoint. For quick analysis during design or in the field, the AMT31 implements an onboard diagnostic system, allowing access to a range of parameters.

Featuring a -40 to 105 °C operating temperature range, the series measures 28.58 x 37.25 x 10.34 mm. Suiting mobile and battery-driven equipment, the device series has a current draw of 10 mA at 5 Vdc. An input range of 4.5~5.5 Vdc is standard, with options for CMOS voltage or line driver outputs. Additional options include radial or axial connector orientations, 9 mating sleeves ranging from 2mm to 8mm, and base plates with multiple pre-drilled mounting hole patters to mate with a wide range of motors.

“We’re excited to introduce our next generation of commutation encoder technology to the market,” stated Jeff Smoot, CUI Devices' VP of Motion Control Products. “Not only does our AMT encoder platform deliver an unrivaled combination of accuracy and durability without the need to compromise, it also delivers a high level of flexibility and intelligence that allows users to drastically reduce development and assembly time compared to existing solutions on the market.”

The AMT31 series is available now through distribution with prices starting at $31.13 per unit at 100 pieces.