As a member of the DISKCON presentation team, Adam Wray , Executive Vice
President, Xyratex, will be presenting 'Equipment Technology for Global
Production + Test' at 15:30 on March 14th at the Rama Garden Hotel, Bangkok,
and then at 13:25 on March 17, 2005 at the Orchid Country Club, Singapore.

beaty magnetic

speeds pudong

About Xyratex
Xyratex is a leading provider of enterprise data storage subsystems and
network technology.

diamagnetic pudong

Founded in 1994 in an MBO from IBM, and with headquarters in the UK,
Xyratex has an established global base with R+D and operational facilities in
Europe, the United States and South East Asia.

bearings electromagnet

Plus, MC-ASDs can sometimes yield lower life-cycle costs than VFDs, despite
lower energy savings, in applications where their non-energy benefits are
particularly valuable.

magnetic pudong

com/reports/c18435) has announced the addition
of Magnetically Coupled Adjustable-Speed Drives: Going Where No VFD Has Gone
Before to their offering. By varying the strength of the magnetic field in the air gap,
these devices can vary the amount of torque transmitted and, thus, the speed
at which the load is driven while the motor operates continuously at full
speed .
There are niches where these MC-ASDs have a first-cost advantage over
their VFD competitors .

suspensions gluckman

quicklinks photodetectors

In others, high VFD installation costs can
make the MC-ASD an attractive alternative despite its higher capital cost.

maglev magnetic

DUBLIN, Ireland, Research and Markets
(http://www.
(Logo: http:/ /www.com/reports/c18435

Laura Wood
Senior Manager
Research and Markets
press@researchandmarkets.

revolve shanghai

Though not as efficient as VFDs, these MC-ASDs can not only save energy in
pump and fan applications but also provide a number of non-energy benefits,
such as vibration isolation, spike-load tolerance, maintenance savings, and
extended equipment life in a variety of applications.researchandmarkets.com
Fax: +353 1 4100 980

org). The company designs and manufactures enabling technology
that provides OEM and disk drive manufacturer customers with data storage
products to support high-performance storage and data communication networks.

bearings diamagnetic

beaty liquids

MC -ASDs also avoid
problems that are sometimes caused by VFDs, such as voltage distortion,
accelerated degradation of motor winding insulation and motor bearings,
excessive voltage applied to motor terminals , nuisance dropouts due to voltage
sags, limitations on low-speed operation, and the expense of stocking parts
for VFDs that may not be available in the future. In some medium and high-voltage applications , the MC-
ASD hardware is simply cheaper.

photodetectors magnetic

However, the value of these non-energy benefits is
highly site-specific and will need to be evaluated on a case-by-case basis.

diamagnetic magnetic

Thanks to recent improvements in MC-ASD technology, two products are
now available that compete well with variable-frequency drives (VFDs) in
limited applications.
We recommend the use of MC-ASDs where VFDs would be unusually expensive
due to medium- or high-voltage operation or to high installation costs, where
sensitive electronic equipment or high outage costs make VFDs a risky
proposition, in processes where prolonged operation at low speed would make a
VFD solution unusually expensive, or in cases where non-energy benefits of the
MC-ASD will be particularly beneficial.
Further information about DISKCON Asia Pacific 2005 is available from
IDEMA (http://www.

fastest shanghai

Research and Markets: Magnetically Coupled Adjustable-Speed Drives: Going Where No VFD Has Gone Before

The conference will address global aspects of the disk drive industry and
how data storage has become the central focus of a truly global business. Wray is also a member of the DISKCON executive panel which will
examine the status of the industry from both business and technology view
points, and provide valuable insights into the factors which influence
industry growth.

suspensions electromagnet

beaty diamagnetic

thorough levitation

com/cgi-bin/prnh/20040820/RESEARCH )
Magnetically coupled adjustable-speed drives (MC-ASDs) transmit torque
between a motor and its load across an air gap , with no physical connection
between the two.

gluckman servocontrol

revolve magnetically

quicklinks bearings

newscom.

fail liquids

researchandmarkets.

The contents of this report are as follows:

Introduction 1
Benefits of Magnetically Coupled ASDs 2
Drawbacks of Magnetically Coupled ASDs 8
Economics of Magnetically Coupled ASDs 9
Niches for MC-ASDs 14
Notes 17

For more information visit http://www .

levitation maglev

HAVANT, United Kingdom, Xyratex Ltd
(Nasdaq: XRTX), a leading provider of enterprise class data storage subsystems
and disk drive test and process solutions, will present at the DISKCON Asia
Pacific 2005 conference being held first in Bangkok and then in Singapore
during the week of March 14th, 2005.

levitated liquids

Distinguished speakers and industry experts will discuss topics ranging from
the latest technologies to enhance capacity, performance and reliability, to
approaches for meeting the increased challenges of manufacturing and
distribution.
Xyratex has over 20 years of experience in research and development relating
to disk drives, storage systems and high-speed communication protocols.

shanghai fail

Xyratex Ltd to Present at DISKCON Asia Pacific 2005

Mr.idema.