Danfoss EM-PMI375 User manual

User Guide
Motor / Generator
EM-PMI375
danfoss.com

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1. General information
1.1. Copyright .........................................................................................................................................................................................
1.2. Intended use of the manual .....................................................................................................................................................
1.3. Product naming convention ....................................................................................................................................................
1.4. Conformity according to standards .......................................................................................................................................
1.5. Warranty ..........................................................................................................................................................................................
1.6. Terms and abbreviations ...........................................................................................................................................................
1.7. Trademarks .....................................................................................................................................................................................
1.8. Responsibility of the manufacturer .....................................................................................................................................
2. Safety information
2.1. General safety statement ........................................................................................................................................................
2.2. Safety message signal words .................................................................................................................................................
2.3. Safety symbols ............................................................................................................................................................................
2.4. Personal protective equipment ............................................................................................................................................
2.5. Security features .........................................................................................................................................................................
2.6. Electromagnetic compatibility (EMC) .................................................................................................................................
3. Product overview
3.1. Intended use of the electric machine .................................................................................................................................
3.2. Used technology ........................................................................................................................................................................
3.3. System introduction .................................................................................................................................................................
3.4. Connections and interfaces ...................................................................................................................................................
3.5. Rating plate ..................................................................................................................................................................................
3.6. Tightening torques ....................................................................................................................................................................
4. Design principles
4.1. System design .............................................................................................................................................................................
4.1.1. Cooling and temperature measurement ..................................................................................................................
4.1.2. Inverter ..................................................................................................................................................................................
4.2. Mounting structure ...................................................................................................................................................................
4.2.1. Supporting structure requirements ............................................................................................................................
4.2.2. Shaft alignment and load ...............................................................................................................................................
5. Transportation and storage
5.1. Transportation ............................................................................................................................................................................
5.2. Receiving and unpacking .......................................................................................................................................................
5.3. Lifting .............................................................................................................................................................................................
5.4. Storage ...........................................................................................................................................................................................
5.4.1. Extended storage ..............................................................................................................................................................
6. Installation
6.1. Required tools .............................................................................................................................................................................
6.2. Insulation resistance test .........................................................................................................................................................
6.3. Mechanical installation ............................................................................................................................................................
6.3.1. Allowed mounting positions .........................................................................................................................................
6.3.2. Mounting the electric machine ....................................................................................................................................
6.3.3. Cooling connections ........................................................................................................................................................
6.4. Electrical installation .................................................................................................................................................................
6.4.1. Power connections ...........................................................................................................................................................
6.4.1.1. High voltage connection ........................................................................................................................................
EM-PMI375
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6.4.1.2. Connection diagram ................................................................................................................................................
6.4.1.3. Cable gland assembly and power line connection .......................................................................................
6.4.2. Low voltage  connections ................................................................................................................................................
6.4.3. Grounding connections ..................................................................................................................................................
6.4.4. Anti-condensation heater connections .....................................................................................................................
7. Operation
7.1. Operation conditions ...............................................................................................................................................................
7.2. Condition monitoring during operation ...........................................................................................................................
7.3. Recommended lubricants ......................................................................................................................................................
7.4. Recommended coolants .........................................................................................................................................................
7.5. Emergency operation ...............................................................................................................................................................
8. Maintenance
8.1. Regular maintenance ...............................................................................................................................................................
8.2. Cleaning ........................................................................................................................................................................................
8.3. Bearings and lubrication .........................................................................................................................................................
8.4. Cooling system maintenance ................................................................................................................................................
9. Dismounting
10. Troubleshooting
11. Aftersales
11.1. Service policy ............................................................................................................................................................................
11.2. Service parts ..............................................................................................................................................................................
12. Disposal
13. Storage, installation and maintenance checklists
EM-PMI375
Table of Contents
2 | © Danfoss | Produced By: Danfoss Power Solutions | November 2018 | BC265856307805en-000103

Revision Information
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EM-PMI375
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This manual is the installation, operation and maintenance manual for the EM-PMI375-T200, EM-
PMI375-T500, EM-PMI375-T800 and  EM-PMI375-T1100  electric machines.
Copyright
Danfoss Oy. All rights reserved.
No parts of this manual may be reproduced or transmitted in any form or by any means, electrical
or mechanical including photocopying, recording or by an information storage or retrieval system,
without permission in writing from the publisher.
All specications and contents of this manual are subject to change without notice.
Intended use of the manual
This manual contains instructions necessary to safely and properly handle, install, operate and
maintain the electric machine. They should be brought to the attention of anyone who installs,
operates or maintains the machine or associated equipment.
All of the safety warnings and instructions in this book must be followed to prevent injury to
personnel or damage to property . Only qualied and authorized personnel, familiar with health
and safety requirements and national legislation, shall be permitted to handle, install, operate and
maintain the device.
This manual must be kept for future reference during installation, operation and maintenance.
This manual uses illustrations as examples only. Illustrations in this manual may not necessarily
reect all system features.
Product naming convention
Frame model indicates dimensions and electrical characteristics of the machine. The following
naming convention is used to refer to electric machine frame model:
EM-PMI375-T200-XXXX+XX
EM-PMI375-T500-XXXX+XX
EM-PMI375-T800-XXXX+XX
EM-PMI375-T1100-XXXX+XX
Table 1. The naming  codes of the electric machine
Part of
the
name Meaning
EM Electric Machine
PMIXXX
or
PMEXXX
Permanent Magnet Internal and a number relative to the  diameter  of the electric machine, or
Permanent Magnet External and a number relative to  diameter of the electric machine
TXXXX Average continuous torque of the motor range, relative to the lenght of the machine
XXXX Rated rotation speed
+XX Options, see option table  below.
The power input of the machine may require one or several three phase power systems. This is
indicated by a power connection option marking, for example:  DUAL or QUAD in the machine
model code. One three phases power system can include one or three connection boxes in the
machine. The most usual case is when an electric machine has a single connection box, but this is
not shown in the machine model  code.
Example: EM-PMI375-T800-1300-DUAL
EM-PMI375
1. General information
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The electric machine can include some of the options available. The options of the electric
machine are shown also  in the rating plate, following the frame model code. Note! Only options
that differ from the standard delivery are indicated. Following options are used, see Table  below.
For detailed information of the models, options and characteristics, see product data sheets.
Table 2. EM-PMI375-T200 options
Feature Option Standard
option Explanation
N-end attachment
+NE1 x Flange. SAE 4 FH
+NE2 Male shaft + ange. DIN5480 W55x2x30x26x8a +
SAE 4 FH
Bearing insulation
* x No insulation
+BIN SKF 6211 insulated bearing in N-end
+BIA SKF 6211  insulated bearing in both ends
Shaft grounding * x No shaft grounding
+SG1 x In-built grounding ring
Protection class
* IP65 protection class
+IP67 IP67 protection class, not available with +BHS
option
Cable direction * x Cable direction towards D-end
+CNE Cable direction towards N-end
Rotation sensor (resolver) * x No rotation sensor
+RES1 In-built non contacting resolver, 6-pole pair
Winding temperature
sensors
* x 3 x PT100 in windings
+TEMP4 6 x PT100 in windings
Bearing temperature
sensors
* x None
+BTMP1 PT-100 in bearings with plug in connector
Anti-condensation heaters * x None
+HEAT1 One 230VAC/50W anti-condensation heater
Table 3. EM-PMI375-T500  options
Feature Option Standard
option Explanation
High voltage
connections
* x One connection box containing one 3 phase system with one
M25 cable gland per phase
-DUAL 2 connection boxes each containing one 3 phase system with
one M32 cable gland per phase
Mounting direction * x Can be mounted in any direction
+MH Horizontal mounting  only
N-end attachment +NE1 x SAE 4 FH
+NE2 Male shaft + ange. DIN5480 W55x2x30x26x8a + SAE 4 FH
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Bearing lubrication * x Bearings greased for life: SKF 6211 2RS1 C3 WT (available BIN)
+BHS Bearing grease lubricated: SKF 6214 C3, Grease LGHP2
Bearing insulation
* x No insulation
+BIN SKF 6211 insulated bearing in N-end
+BIA SKF 6211  insulated bearing in both ends
Shaft grounding * x None
+SG1 D-end shaft grounding
Protection class * x IP65 protection class
+IP67 IP67 protection class, Not available with +BHS option
Cable direction * x Cable direction towards D-end
+CNE Cable direction towards N-end
Rotation sensor
(resolver)
* x No rotation sensor
+RES1 In-built non contacting resolver, 6-pole pair
Winding
temperature
sensors
* x 3 x PT100 in windings
+TEMP4 6 x PT100 in windings
Bearing
temperature sensor
* x No temperature sensors
+BTMP1 PT-100 in bearings with plug in connector
Anti-condensation
heaters
* x None
+HEAT1 One 230VAC/50W anti-condensation heater
Table 4. EM-PMI375-T800 options
Feature Option Standard
option Explanation
High voltage
connections
* x One connection box containing one 3 phase system with one
M25 cable gland per phase
-DUAL 2 connection boxes each containing one 3 phase system with
one M32 cable gland per phase
Mounting direction * x Can be mounted in any direction
+MH Horizontal mounting  only
N-end attachment +NE1 x SAE 4 FH
+NE2 Male shaft + ange. DIN5480 W55x2x30x26x8a + SAE 4 FH
Bearing lubrication * x Bearings greased for life: SKF 6211 2RS1 C3 WT (available BIN)
+BHS Bearings: SKF 6211 C3, Grease: SKF LGHP2 (requires MH)
Bearing insulation
* x No insulation
+BIN SKF 6211 insulated bearing in N-end
+BIA SKF 6211  insulated bearing in both ends
Shaft grounding * x No shaft grounding
+SG1 In-built grounding ring
EM-PMI375
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Protection class * x IP65 protection class
+IP67 IP67 protection class, Not available with +BHS option
Cable direction * Cable direction towards D-end
+CNE Cable direction towards N-end
Rotation sensor
(resolver)
* x No rotation sensor
+RES1 In-built non contacting resolver, 6-pole pair
Winding
temperature sensor
* x 3 x PT100 in windings
+TEMP4 6 x PT100 in windings
Bearing
temperature
sensors
* x None
+BTMP1 Plug in connector
Anti-condensation
heaters
* x None
+HEAT1 One 230VAC/50W anti-condensation heater
Table 5. EM-PMI375-T1100 options
Feature Option Standard
option Explanation
High voltage
connections
* x One connection box containing one 3 phase system with one
M25 cable gland per phase
-DUAL 2 connection boxes each containing one 3 phase system with
one M32 cable gland per phase
N-end attachment +NE1 x SAE 4 FH
+NE2 Male shaft + ange. DIN5480 W55x2x30x26x8a + SAE 4 FH
Bearing insulation
* x Bearing types according to BHS
+BIN SKF 6214 insulated bearing in N-end
+BIA SKF 6214 insulated bearing in both ends
Shaft grounding * x No shaft grounding
+SG1 In-built grounding ring
Protection class * x IP65 protection class
+IP67 IP67 protection class
Cable direction * x Cable direction towads D-end
+CNE Cable direction towads N-end
Rotation sensor
(resolver)
* x No rotation sensor
+RES1 In-built non contacting resolver, 8-pole pair
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Winding
temperature
sensor
* x 3 x PT100 in the windings
+TEMP4 6 x  PT100 in the windings
Bearing
temperature
sensor
* x No temperature sensors
+BTMP1 PT-100 in bearings with plug in connector
Anti-condensation
heaters
* x None
+HEAT1 230VAC/50W, with -DUAL option not possible
Conformity according to standards
The electric machine  has been  designed to be in conformity with the  following directives and to
meet the requirements specied in the following standards:
Table 6. Applicable Directives and standards
Standard Explanation
Low Voltage Directive 2006/95/EC
(until 19.4.2016) and  Low Voltage
Directive 2014/35/EC (from
20.4.2016 onwards)
Electrical equipment means any equipment designed for use with a
voltage rating of between 50 and 1000 V for alternating current.
This  electric machine  is  subject to the Low Voltage Directive
2006/95/EC or 2014/35/EC.
Machinery Directive 2006/42/EC This electric machine is partly subject to the Machinery Directive 2006/42/EC and it is considered as partly completed machinery, as a
part of the nal machinery.
IEC 60034-1:2010 Rotating electrical machines - Part 1: Rating and performance
IEC 60034-5:2001/A1:2007 Rotating electrical machines - Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code) -
Classication
IEC 60034-6:1993 Rotating electrical machines - Part 6: Methods of cooling
IEC 60034-7:1993 Rotating electrical machines - Part 7: Classication of types of construction, mounting arrangements and connection box position
(IM Code)
IEC 60034-8:2007/A1:2014 Rotating electrical machines - Part 8: Terminal markings and direction
of rotation
IEC 60034-14:2004/A1:2007 Amendment 1 - Rotating electrical machines - Part 14: Mechanical vibration of certain machines with shaft heights 56 mm and higher -
Measurement, evaluation and limits of vibration severity.
Warranty
Danfoss offers warranty against defects in workmanship and materials for its products for a period
of twelve (12) months from commissioning or eighteen months (18) from delivery (Incoterms-
EXW), whichever occurs rst.
In order for the warranty to be valid, the customer must follow the requirements of this and all
related documents, especially those set out in the product installation and maintenance, as well as
the applicable standards and regulations in force in each country.
Defects arising from the improper or negligent use, operation, and/or installation of the
equipment, non-execution of regular preventive maintenance, as well as defects resulting from
external factors or equipment and components not supplied/recommended by Danfoss, will not
be covered by the warranty.
The warranty will not apply if the customer at its own discretion makes repairs and/or
modications to the equipment without prior written consent from Danfoss.
EM-PMI375
1. General information
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Terms and abbreviations
The  symbols, terms and abbreviations in the Tables below are possibly used in this manual.
Table 7. Symbols
Symbol Variable Unit
U Rated voltage (phase to phase AC) Vrms
I Rated current (AC) Arms
P Rated Power (S9) kW
T Rated torque (S9) at rated speed Nm
T
max Maximum torque Nm
n Rated speed rpm
Max n Maximum speed rpm
f Rated supply frequency at nominal speed Hz
PF Power factor (cos φ )
Q
c Rated coolant liquid ow l/min
T
c Rated coolant liquid input temperature °C
T
amb Rated ambient temperature °C
RES_COS Cosine signal received from the resolver deg
RES_SIN Sinusoidal signal received from the machine resolver deg
GND Ground in electrical connections
Ω (Ohm) Resistance Ω
Table 8. Term / abbreviation
Term/
Abbreviation Explanation
Resolver Rotation meter in electric machines, used for measuring degrees of rotation
AC Alternating current
DC Direct current
PMSM Permanent Magnet Synchronous Machine
SRPM Syncronous Reluctance assisted Permanent Magnet
S1 Duty type according to the IEC60034;  Continuous running duty
S9 Duty type
 according to the IEC60034; Duty with non-periodic load and speed
variations
Trademarks
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss
logotype are trademarks of Danfoss A/S. All rights reserved.
EM-PMI375
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Responsibility of the manufacturer
Danfoss  is responsible for the safety, reliability and performance of the electric machine  only if:
Handling, mounting, installation, operation and maintenance are done by qualied and
authorized  personnel.
The installation of the system complies with the requirements of the appropriate regulations.
The electric machine  is used in accordance with the instructions in this manual.
The electric machine  is installed, maintained and serviced in accordance with the instructions
in this manual.
EM-PMI375
1. General information
10 | © Danfoss | Produced By: Danfoss Power Solutions | November 2018 | BC265856307805en-000103

General safety statement
The electric machine  is intended for use as a component for industrial and commercial
installations. The end product containing the electric machine  must conform with all related
regulations.
The use of the electric machine  is prohibited in hazardous areas unless it is expressly designed
for such use.
The electric machine  is intended for installation, use and maintenance by qualied personnel,
familiar with health and safety requirements and national legislation. Ignoring these
instructions may invalidate all applicable warranties.
These instructions must be followed to make sure of safe and correct  installation, operation
and maintenance of the electric machine. They should be brought to the attention of anyone
who installs, operates or maintains the electric machine  or associated equipment.
High voltage and rotating parts can cause serious or fatal injuries. For electric machine  covered
by this manual, it is important to observe safety precautions to protect personnel from
possible injury.
Safety message signal words
Safety message signal words indicate the severity of a potential hazard.
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death
or serious injury.
CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury. CAUTION may also alert against unsafe practices.
NOTICE Indicates a potentially hazardous situation which, if not avoided, could result in property
damage.
Safety symbols
The following safety- and information related symbols appear in this manual and on the electric
machine.
Danger
This symbol is is identied by a yellow background, red octagonal band and a black STOP text. It indicates a hazardous situation
that causes severe injury or death. Action indicated by this symbol may not be executed.
General warning
This symbol is identied by a yellow background, black triangular band, and a black exclamation point symbol. It indicates a
general potentially hazardous situation.
Electric shock warning
The symbol is identied by a yellow background, black triangular band, and a black arrowhead symbol. It indicates dangerous
electrical voltage that could cause an electric shock to a person.
Burn warning
The symbol is identied by a yellow background, black triangular band, and a black wavy lines- symbol. It indicates a hot device
that could cause burns to a person.
Magnet warning
The symbol is identied by a yellow background, black triangular band, and a black magnet symbol. It indicates strong magnetic
eld that could cause harm to a person or property.
EM-PMI375
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Rotating shaft warning
The symbol is identied by a yellow background, black triangular band, and a black rotating shaft symbol. It indicates strong
rotating shaft that could cause harm to a person or property.
General Information
Read the instructions in the manual
Personal protective equipment
Personal protective equipment shall be used when necessary during handling, installation and
maintenance of the electric machine to avoid injury.
Use eye protective equipment like safety goggles or mask when you work  with the electric device.  Permanent damage to the eye
could be caused if bearing grease, melted nitrile rubber (radial lip seal), glycol or other uids splash.
Use hearing protective equipment when you work  on the electric machine.  Hearing injuries can  be caused by too loud noise
(noise in excess of 85 dBA).
Use head protective equipment like helmet when you lift  the electric machine! Head injuries can  be caused by object impact.
Use cut resistant gloves when you  handle  and maintain  the electric machine.  There is a risk of cut injuries.
Use protective footwear when you lift  or move  the electric machine! Foot injuries could be caused if lifting system or lifting
brackets fail.
Security features
The electric machine  has  at least one PT100 temperature sensor in the windings. The amount of
the sensors depend on the options chosen. The temperature signal(s) can be read out from the
measurement connector of the machine. You can connect the temperature signal to the
temperature surveillance pin in the inverter (EC-C) and make sure that the inverter has the
machine temperature protection feature activated.
Electromagnetic compatibility (EMC)
When interfacing other equipment, connect only equipment that are specied as part of the system and that
are  compatible.
Magnetic and electromagnetic elds generated near the current-carrying conductors and permanent magnets in electric
machines represent a health danger to persons with heart pacemakers, metal implants and hearing aids . Persons with a
heart pacemaker, metal implants or hearing aids must consult a doctor before they enter the following areas:
Areas in which electric equipment and parts are operated
Areas in which electric equipment with permanent magnets are stored, mounted, operated or repaired
If necessary, perform a special electromagnetic compatibility (EMC) test on the installation .
EM-PMI375
2. Safety information
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EMC stands for Electromagnetic compatibility. It is the ability of electric equipment to operate
without problems within an electromagnetic environment. Likewise, the equipment must not
disturb or interfere with any other product or system within its locality. This is a legal requirement
for all equipment taken into service within the European Economic Area (EEA).
Our products are designed with high standards of EMC in mind. Connect the power lines and
groundings along the instructions in this manual to achieve the required level of EMI  protection.
It is the responsibility of the installer to ensure that the equipment or system into which the
product is incorporated complies with the EMC legislation of the country of use. Within the
European Union, equipment into which this product is incorporated must comply with the EMC
Directive 2004/108/EC.
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This product manual is about four  electric machines: 
EM-PMI375-T200
EM-PMI375-T500
EM-PMI375-T800
EM-PMI375-T1100
The  electric machines  have  been developed especially for heavy duty, marine and transportation
applications. They are  more reliable, smaller, lighter and more  efficient  than conventional products
on the market.
Typical applications of  the electric machines are:
Motor (electric propulsion) and generator for hybrid marine vessels or mobile work machine
and bus parallel hybrid applications.
Traction motor and generator for electrical or hybrid electrical mobile work machines or buses.
The electric machines feature Syncronous Reluctance assisted Permanent Magnet (SRPM) motor
technology, having several advanced features:
Extremely compact and robust structure.
High efficiency throughout the operation range.
Liquid cooling with water/glycol mixture.
Low coolant ow required.
High allowed coolant temperature.
IP65 enclosure class to maximize reliability.
Multiple mounting possibilities.
Extended speed and torque capabilities compared to standard PM machines.
Machine structure designed to be able to produce high starting torques (instant torque to
non-moving wheel).
Optimized speed range to meet most common gear ratios used in heavy mobile machinery.
Figure 1. EM-PMI375-T200
EM-PMI375
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Figure 2. EM-PMI375-T500
Figure 3. EM-PMI375-T800
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Figure 4. EM-PMI375-T1100
The  electric machines have several frame models (sizes) to be the optimal solutions for several
applications.  They  also have  options for shaft type, attachment interface, bearings, connection
box attachment, rotation sensors and temperature sensors.
Intended use of the electric machine
This electric machine  is  intended to be used as a motor or generator and as a part of a machinery,
for example  in:
Power train of a marine vessel, transportation vehicle or a heavy duty work machine.
Power generation equipment.
The  electric machine  is  intended to be powered and controlled with an inverter or inverters
capable of supplying three-phase alternating current and that is capable of controlling the
electric  machine. The electric machine  is  not suitable for direct online use.
In a power generation equipment the  electric machines are intended to be powered by a prime
mover, for example,  an internal combustion engine and controlled by the above mentioned
electric power inverter.
The electric  machine  is  solely intended for professional use, and may be operated only by trained
professionals. The maintenance of the electric machine may be done  only by trained professionals.
Not-allowed use of the  electric machine
It is forbidden to use, handle and maintain the machine in following ways (including but not
limited to):
Using the electric machine  for other purposes than dened in this  manual.
Disregarding the obligation to comply with the manual, safety signs and rating plate of the
electric machine.
Using the electric machine, making adjustments and maintenance without rst reading
this  manual.
Exceeding the designed limits during the electric machine operation.
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Using non-original service parts of wrong material causing corrosion problems and mechanical
failures in time.
Operating and performing maintenance for the electric machine  without appropriate personal
protective equipment.
Using electric machine parts like frame, shaft end or terminal box for climbing or for support
for other structures.
Causing any kind of impact forces to the electric machine (for example  hitting or hammering
or dropping objects).
Operating the electric machine  with electric connections other than dened in the manual
and/or other documents.
Operating the electric machine  with insufficiently tightened connections or cable glands.
Operating the electric machine  with power cables routed against the instructions.
Operating the electric machine  without properly dimensioned and operating cooling system.
Operating the  electric machine  without following the bearing lubrication instructions.
Accessing the connection box(es) of the electric machine, doing  maintenance or adjustment
operations on the electric machine with  the electricity connected.
Accessing the connection box(es) if  the shaft can  be turned by an external prime mover.
Lifting the electric machine  from wrong lifting points and without correct  lifting equipment.
Lifting additional load with the machine.
Storing the electric machine  outdoors in wet or dusty conditions.
Storing the electric machine  without correct  support to prevent rolling or falling of the
machines.
Using the electric machine  in potentially explosive environment.
Allowing dirt or liquid to enter into the electric machine or connection box.
Using cables that can't withstand the maximum currents of the electric machine  .
Used technology
The electric machine  is a  Syncronous Reluctance assisted Permanent Magnet (SRPM) machine. This
technology has several benets compared to standard permanent magnet (PM) technology and
traditional induction machine (IM) technology. The SRPM technology combines the benets of PM
and Syncronous Reluctance technology, having increased torque capability over wide speed range
and ability to produce torque to higher speeds. The electric machine efficiency at lower speeds is
also good.
The supply current to the machine stator windings create rotating magnetic eld, which in turn
rotates the rotor containing permanent magnets. In the syncronous permanent magnet machine,
the rotation of the rotor (shaft) is syncronized with the frequency of the power supply current. The
reluctance technology maximizes the pull-out torque of the machine.
The permanent magnets of  the rotor are of salient-pole design, having embedded permanent
magnets in the rotor structure. This structure makes the  electric machine mechanically more
stable and capable of higher speed operations. See Figure below illustrating the magnet topology
of the electric machine. The gure shows the principle only, and is not an exact illustration of the
structure.
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Figure 5. Machine  topology
1 Electric machine stator and stator windings
2 Electric machine rotor
3 Permanent magnets in the rotor
System introduction
Danfoss provides electric drive trains for applications in heavy mobile work machines, marine
vessels and buses. The drive trains include all essential components from converting from
traditional to hybrid electric (HEV) or electric vehicle (EV) solutions. Danfoss  technology saves fuel
and lowers emission and noise levels.
Figure 6. Overview of the Danfoss drive train system
The electric machines are liquid cooled with water/glycol mixture. For more information, see
chapter Cooling .
A low voltage measurement signal connector is attached to the electric machines. Different
temperature and resolver signals can be read, depending on the machine options chosen. For
more information about the connection, see chapter Low voltage (Measurement signal)
connections.
The  electric machines (some models) can be equipped with one or two anti-condensations
heater(s), depending on the machine type and the option chosen. The heater is used to prevent
any water condensing inside the machine enclosure.
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Figure 7. Overview of electric machine system
Connections and interfaces
The electric machines are connected mechanically and electrically as a part of a machinery or as a
part of a power generation equipment.
Mechanical interfaces:
Lifting points.
Flange mounting (D-end and N-end).
Shaft connection(s).
Cooling system connections (bores).
Grease escape/ll connections; depending on model and option (BHS): maintenance use only.
Air ventilation plug.
Electrical interfaces:
Power connections through the connection box.
Measurement connections.
Anti-condensation heater(s) connector (+HEAT1).
Power grounding connection.
Low voltage (measurement signal) grounding connection.
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