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Electrical systems
News Release from: Schaeffler (UK) | Subject: IDAM torque motors
Edited by the Manufacturingtalk Editorial
Team on 31 December 2007
Torque motors suit turning centres
Latest torque motors presented at EMO 2007 ensure optimized latching force and load pulsation, reach peak forces of 13,000N and are now suitable for use in large machining centers.
Drives and Mechatronics (IDAM) showed innovative direct drive technology and mechatronic solutions for machine tools at EMO 2007 in Hanover New developments for torque motors ensure optimized latching force and load pulsation
This article was originally published on Manufacturingtalk on 21 Aug 2008 at 8.00am (UK)
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The L2U linear motor series reach peak forces of up to 13,000 N and is now suitable for use in large machining centers, said IDAM on the Schaeffler Group exhibition stand.
IDAM focuses on the optimization of latching force behavior and load pulsation.
Latching forces are magnetic reaction forces (reluctance changes) that can be measured even at the de-energized motor and can only partially be compensated for by high performance controls.
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Load or moment pulsation has the effect that even with constant moment current the released moment fluctuates about an average value.
This cannot be compensated for with the help of commonly available controls.
These characteristics often result in vibration problems.
Yet they can also lead to short-wave surface defects of the machined workpieces.
A mechanical excitation of the system and significant acoustic vibration can for example be the consequence in gear wheels manufactured for transmissions.
The optimization of the internal structure makes it possible to diminish this effect for all IDAM motors or even reduce it down to a non-detectable level.
Further focal points in development include higher efficiency, speed increases and the reduction of heat power loss.
Longer service life on machining centers and turning centers - theL2U linear synchronous symmetrical motor series is a fundamentally refined one that reaches peak forces of up to 13,000 N with a deadweight of 45kg.
IDAM said it is now possible to equip large machining centers with these motors.
The main advantage of this motor technology is the compensation of magnetic forces of attraction between motor and magnet.
The resulting unloading of the guidance system results in clearly longer service life.
In addition, accuracies are maintained for a longer period and heat generation due to friction is reduced.
This is achieved with an iron core linear AC synchronous motor with two symmetrically opposed secondary parts.
The reduced iron content in the movable primary part additionally helps reduce the mass in this three-phase motor.
The lower deadweight of the L2U motors relative to the payload has a positive effect for highly dynamic tasks with relatively low payloads (up to ten times the mass of the primary part).
* About Schaeffler - with approximately 63,000 employees at more than 180 locations worldwide and consolidated sales of EUR8.3bn (2006), the Schaeffler Group is a leading global bearing manufacturer and automotive component supplier.
Group members are Schaeffler KG with its two brands INA and FAG, headquartered in Herzogenaurach, and the LuK Group which is based in Buehl/Baden.
The Industrial Division provides bearing solutions to some 60 different industrial segments via its Production Machinery, Heavy Industries, Power Transmission and Railway and Consumer Products business sectors. Request a free brochure from Schaeffler (UK) ...
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