2 Features and benefits
TCGB0070 rev.3 - 04/2012
37
2
DC compressor with neodymium magnet
The use of a DC compressor with neodymium magnets in the rotor improves the performance at around the 30-40Hz range
where the operation time of the inverter compressor is longest. Additionally, to suppress electromagnetic noise interference
and achieve low noise, the rotor has been divided into two parts and the electric pole displaced.
Characteristics at low speed, which affect the annual running cost, have been significantly improved.
High ef
ficiency
motor (%)
DC motor
AC motor
rpm
Rotor shape
optimized
Neodymium
magnet
Reduction
of the typical
electromagnetic
noise of the DC
compressor.
Increased
efficiency in
the complete
range of
rpms used
Compressor rotor
Low noise
•
Inverter control:
The inverter controls compressor speeds from 30Hz to 115Hz, quickly reaching the set temperature
and maintaining a stable energy-saving operation, thus reducing the noise since the compressor is not running conti-
nuously.
Setting temperature (in heating mode)
Room temperature
Set temperature
RAS-H(V)RNME-AF
Machine with constant speed
Time
-
In the case of RAS-H(V)RNME-AF: Quickly reaches the temperature set at high power, then maintains stable
energy-saving operation.
-
In the case of other constant speed machines: Slowly reaches the set temperature, then turns on and off repeate-
dly to maintain the temperature, operating uneconomically and wasting energy.
Power consumption (in heating mode)
Compressor (rpm)
High power
operation
Energy saving
operation
Machine with constant speed
S
RAS-H(V)RNME-AF
Time
-
In case of existing machines with constant speed, repeated turning on and off wastes energy.
•
Optimized rotor shape: The scroll compressor allows reduced noise and vibration levels due to:
-
The compression points are evenly distributed along the compression stroke.
-
The reduced number of components used
-
Use of a high-pressure insulation shell.
