Incremental Encoder IC

  Enquire / contact me

6-channel, replace Hall encoders

Automation

Incremental Encoder IC
Incremental Encoder IC

For the electronic commutation of small motors, the iC-LTA/iC-PT series monolithic speed and commutation encoders from iCHaus replace Hall encoders in brushless motors. They are based on a flat optoQFN that is 0,9 mm thick with a ultrathin glass lid. The optimized phased array structure of the photochips means that a minimal scanning area of just 1.9 x 3.1 mm is enough to generate 2,500 pulses from a code disc measuring only 26 mm across, for example. iC-PT sensors and measurement standards for diameters of 26 mm (iC-PT2613) and 33 mm (iC-PT33xx) are available. iC-LTA is a functionally compatible yet unstructured photo array for specific customized design. The Hall sensors used for motor commutation to date have been replaced by three separate on-chip scanning tracks. Here, the code disc stipulates the required signal and can be easily designed to suit the required motor pole count. The photocurrent signals are conditioned by low-noise CMOS amplifiers and can either be compared or interpolated twice and output through 4 mA push/pull drivers as indexed encoder quadrature signals. Output frequencies of up to 800 kHz are permitted, enabling motors with speeds of up to 20,000 rpm to be controlled (at 2,500 pulses). Analog test signals can be activated for assembly and alignment. The small sampling area and a high sensitivity help to reduce the amount of power needed for the obligatory LED; a few milliamperes of operating current are sufficient. This improves the expected lifetime of the LED, especially if the motor has high operating temperatures. Devices iC-LTA and iC-PT control the LED themselves and also compensate for fluctuations in the operating temperature range of -40 to +120°C. Using the latest encoder LEDs, such as iC-TL85 or iC-SD85, for example, the system current consumption is around 12 mA. A supply voltage starting at just 3.5 V is enough and enables an external polarity protection circuit and voltage regulator to be added if required when the device is operated on 5 V.

Edited by: Teoman Tugsuz

Posted on February 22, 2011 - (1782 views)
iC-Haus GmbH
Am Kuemmerling 18
55294 Bodenheim - Germany
+49-6135-9292300
+49-6135-9292192
View full company profile
Location
Related articles
''Esprit'' Libre
SCADA for Supervision and HMI
Advanced Automation Solutions
Solutions for Digital Data Exchange
Medical Grade PC
Widescreen HMIs GT21 and GT25
Power Management System for IIoT
Modular Compact CPU Board
Absolute Modular Encoders
Automation Server
Leading Distributor in Automation & Robotics Technology
Modbus TCP EtherCAT PROFINET
IIoT I/O Series
Mercury: Mobile, multi-protocol diagnostics for all environments
Sure Signs of Excellence: Top Notch Products Offering Added Value
Innovative Systems Solutions Made by LAPP
Alarm-Annunicators, Grouped Indicators, Tri-Led and Phase Presences
Advanced Thermal Imaging Exx-Series
AN INDUSTRY FIRST FOR INDUSTRIAL ETHERNET
A Sure Sign of Excellence: Top-notch Products Offering Added Value
Medical Grade PC
Power Management System for IIoT
Modular Compact CPU Board
Absolute Modular Encoders
High-Performance Box PC
Photovoltaic Fuse Holder
Fanless Controller
Semi-absolute Linear Encoder
Web-Based Engineering Tool
Industrial Cellular RTUs