3.7 Energy Efficiency
The standard
EN 50598 Ecodesign for power drive systems, motor starters, power electronics and their driven applications
provides guidelines for assessing the energy efficiency of frequency converters.
The standard provides a neutral method for determining efficiency classes and power losses at full load and at part load.
The standard allows combination of any motor with any frequency converter.
Extended product
Motor system
Drive system (PDS)
Complete drive module (CDM)
Infeed
section
Auxiliaries
Auxiliaries
Motor
Motor starter
contactors, soft starters, ...
Motor control system = CDM or starter
Driven equipment
Trans-
mission
Load
machine
Basic
drive
module
(BDM)
Mains
and
mains
cable
130BE604.11
Illustration 3.14 Power Drive System (PDS) and Complete Drive Module (CDM)
3.7.1 IE and IES Classes
Complete drive modules
According to the standard EN 50598-2, the complete drive
module (CDM) 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
A power drive system (PDS) consists of a complete drive
module (CDM) 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.
System Integration
VLT
®
DriveMotor FCP 106/FCM 106
44
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