SYNCHRONOUS AND
ASYNCHRONOUS MOTOR
TECHNOLOGY
This new and innovative series of
general-purpose motors combines
the strengths of both asynchronous
and synchronous motors in a single
drive system. No aluminium, copper
or expensive rare earth magnets
are used in the rotors. Instead they
are made of electrical steel with a
specialised profile and arranged
in series, making the drive highly
durable and maintenance friendly,
the characteristic advantages of
asynchronous motors.
On the other hand, the control
properties of the new motors are
The synchronous reluctance
motor boasts significantly
enhanced efficiency rates. The
variable-speed versions of
Kaeser’s CSD/CSDX series rotary
screw compressors feature a
synchronous reluctance drive
system from Siemens.
comparable to those of synchronous
motors. The special rotor design
enables reluctance motors to deliver
high speeds without additional rotor
warming due to current flow. The key
to this lies in optimised matching of
the drive system elements, i.e. the
motor and frequency converter. It is
the perfectly harmonised interplay
between these two components
that facilitates maximum energy
savings.
The CSD(X) series of rotary screw
compressors with SFC variable
speed drives from Kaeser are
available with drive powers of 45 to
90 kW, and produce flow rates from
2.13 to 16.03 m3/min, designed for
pressures 7.5 to 13 bar.
Power Transmission
“PACKAGED”
To Suit Your Needs
Worm Gear Motors and Worm Gear Reducers
• Modular design with ISO standard flanged input together with output
flanges, torque arms, plus simple connection of multiple staged
reductions
• 100% compatible with ISO flange mounted motors
• Lightweight aluminium design
• Available in 10 sizes with power ratings .09kW - 15kW and ratios of
7.5:1 to 6,400:1
RR Fisher & Co Ltd
PO Box 23293 Auckland
Auckland
Ph: 09 278 4059 Fax: 09 279 8286
Christchurch
Ph: 03 377 0025 Fax: 03 377 0086
EN082
REN271
www.engineeringnews.co.nz 43
/www.engineeringnews.co.nz
