9.1.2 IE and IES Classes
Complete drive modules (CDM)
According to the standard IEC 61800-9-2, the complete
drive module comprises the frequency converter, its
feeding section, and its auxiliaries.
Energy efficiency classes for the CDM:
•
IE0 = below state of the art.
•
IE1 = state of the art.
•
IE2 = above state of the art.
Danfoss frequency converters fulfill energy efficiency class
IE2. The energy efficiency class is defined 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 efficiency 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 efficiency, motors driven by a
Danfoss VLT
®
frequency converter typically fulfill energy
efficiency class IES2.
The energy efficiency class is defined at the nominal point
of the PDS and can be calculated based on the CDM and
the motor losses.
9.1.3 Power Loss Data and Efficiency Data
The power loss and the efficiency of a drive depend on
configuration and auxiliary equipment. To get a configu-
ration-specific power loss and efficiency data, use the
Danfoss MyDrive ecoSmart tool.
The power loss data is provided in % of rated apparent
output power and are determined according to IEC
61800-9-2. When the power loss data are determined, the
drive 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 9.2 Drive Operating Points According to IEC
61800-9-2
Use the Danfoss MyDrive ecoSmart application to calculate
the power loss data and efficiency data of the drive at the
operating points, and at the IE and IES efficiency classes.
The application is available at
.
Example of available data
The following example shows power loss and efficiency
data for a drive with the following characteristics:
•
Power rating 55 kW (75 hp), rated voltage at
400 V.
•
Rated apparent power, S
r
, 67.8 kVA.
•
Rated output power, P
CDM
, 59.2 kW (79.4 hp).
•
Rated efficiency, η
r
, 98.3%.
and
show the power loss and
efficiency curves. The speed is proportional to the
frequency.
Appendix
Design Guide
MG80C602
Danfoss A/S © 05/2019 All rights reserved.
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