Product category:
Drives, motors and power transmission, couplings, clutches
News Release from: Control Techniques Dynamics | Subject: Speed Loop module technology
Edited by the Manufacturingtalk Editorial
Team on 15 February 2002
Module samples shaft speed every 30
microsec
Such is the success of Speed Loop (SL) module technology, now offered to customers as part of a range of AC brushless motors, that other motion control companies companies are showing interest.
Such is the success of Control Techniques Dynamics Speed Loop (SL) module technology, now offered to customers as part of its range of Unimotor AC brushless motors, that other motion control companies are showing interest in the product The only company able to offer this technology, CT Dynamics is assembling the high performance feedback device on a full production line basis and with fully automated testing facilities
This article was originally published on Manufacturingtalk on 22 May 2000 at 8.00am (UK)
Related stories
Drive improves palletiser speed and reliability
Beer and beverage can manufacturer American National Can Group has increased the reliability and speed of its automatic palletiser with the installation of a servo motor and drive package
High torque per volume ratio from AC servo motor
The new 55 AC brushless permanent magnet servo motor range from Control Techniques Dynamics is a low cost compact motor offering dynamic performance and positioning accuracy.
Offered to customers as a standard option, the system is a speed and position feedback devise for use with the M'Ax range of Control Techniques servo Drives and Control Techniques Dynamics permanent -magnet Unimotor SL motor range.
The module is mounted directly on the motor and consists of the following: * High Precision CT Coder ( Sin-Cos encoder).
Further reading
Single drive package helps pet product manufacture
Thomas's Europe, one of the UK's largest manufacturers of pet snacks and treats, has purchased a state-of-the-art servo motor/drive package from Control Techniques Dynamics
New frameless motor for sub-fractional market
The new 55 AC brushless permanent magnet servo motor range from Control Techniques Dynamics responds to the demands for a low cost compact motor offering dynamic performance and positioning accuracy.
Plug and play motors reduce installation time
Control Techniques Dynamics has produced a "plug and play" version of its Unimotor 190 AC brushless servomotor. Its 190 frame motors have an improved IP rating and new connectorised 190 housing.
* High-speed, two wire RS485 serial communications interface operating with the Drivelink protocol for data transfer to and from the Drive and motion controller.
The module samples the shaft speed and position every 30 Micro seconds to a resolution of one eight-millionth of a revolution.
The following information is then transmitted over the serial communication link.
* Position and speed demands from motion controller.
* Position feedback to the motion controller.
* Current / Torque demands from the Drive.
* Parameter values.
By the factory programming of the on-board memory with all relevant motor parameters, the Control Techniques Dynamics' A module offers complete "plug and play" facilities with Control Techniques ' M'Ax drive.
The close proximity of the encoder and electronics enables low noise interpolation resulting in its very high resolution of 8 million counts per turn.
With automatic local control of the motor now provided through the A, CT Dynamics has been able to reduce the number of cores needed in the feedback cables.
This makes cabling quicker, simpler and easier to carry out.
Signal connections to the motor are limited to just 4 wires including the dc power and digital communication and is not subject to error tolerance due to system noise.
Feedback resolution and jitter-free system synchronisation is such that acceleration feedback can be computed (double differentiation of position).
A stable response can be achieved accelerating or when a load disturbance occurs whilst running at a constant speed.
Extremely sensitive speed control is possible through the system's ability to detect very low levels of acceleration induced in high inertial loads combined with its associated torque variation.
There is no performance degradation in noisy environments and no loss of feedback information during fast transient disturbances.
Forming part of its ongoing commitment to new technology and product improvement, CT Dynamics anticipates that the new A will prove its largest growing sales option during 2002.
To meet this growing demand a dedicated production area with full electrostatic (ESD) protection has been created at CT Dynamics factory in Andover Hampshire.
As an adjunct to CT Dynamics state-of-the-art Unimotor range, the A will provide industry with even greater speed and positioning performance in demanding applications.
Ends.
• Control Techniques Dynamics: contact details and other news
• Email this article to a colleague
• Register for the free Manufacturingtalk email newsletter
• Manufacturingtalk Home Page
Search the Pro-Talk network of sites
