Danfoss VLT AHF 005

3.2.2 IE and IES Classes
Complete drive modules (CDM)
According to the standard EN 50598-2, the complete drive
module comprises the frequency converter, its feeding
section, and its auxiliaries.
Energy eciency classes for the CDM:
•
IE0 = below state of the art.
•
IE1 = state of the art.
•
IE2 = above state of the art.
Danfoss frequency converters fulll energy eciency class
IE2. The energy eciency class is dened at the nominal
point of the CDM.
Power drive systems (PDS)
A power drive system consists of a complete drive module
and a motor.
Energy eciency classes for the PDS:
•
IES0 = Below state of the art.
•
IES1 = State of the art.
•
IES2 = Above state of the art.
Depending on the motor eciency, motors driven by a
Danfoss VLT
®
frequency converter typically fulll energy
eciency class IES2.
The energy eciency class is dened at the nominal point
of the PDS and can be calculated based on the CDM and
the motor losses.
3.2.3 Power Loss Data and Eciency Data
The power loss and the eciency of a frequency converter
depend on conguration and auxiliary equipment. To get a
conguration-specic power loss and eciency data, use
the Danfoss ecoSmart tool.
The power loss data is provided in % of rated apparent
output power and are determined according to EN
50598-2. When the power loss data are determined, the
frequency converter uses the factory settings except for
the motor data which is required to run the motor.
T
f
100%
50%
50% 90%
25%
0%
0%
130BE605.10
T Torque-producing current [%]
f Frequency [%]
Illustration 3.10 Frequency Converter Operating Points
According to EN 50598-2
Refer to www.danfoss.com/vltenergyeciency for the power
loss and eciency data of the frequency converter at the
operating points specied in Illustration 3.10.
Use the Danfoss ecoSmart application to calculate IE and
IES eciency classes. The application is available at
ecosmart.danfoss.com.
Example of available data
The following example shows power loss and eciency
data for a frequency converter with the following charac-
teristics:
•
Power rating 55 kW (75 hp), rated voltage at
400 V.
•
Rated apparent power, Sr, 67.8 kVA.
•
Rated output power, P
CDM
, 59.2 kW (79.4 hp).
•
Rated eciency, η
r
, 98.3%.
Illustration 3.11 and Illustration 3.12 show the power loss
and eciency curves. The speed is proportional to the
frequency.
Basic Operating Principle o... Design Guide
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