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.
Forbidden 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 defined in this user guide.
•
Disregarding the obligation to comply with the user guide, safety signs and rating plate of the electric
machine.
•
Using the electric machine, making adjustments and maintenance without first reading this user
guide.
•
Exceeding the designed limits during the electric machine operation.
•
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 defined in the user guide 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.
•
Touching the connection terminal of the electric machine or 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 cannot withstand the maximum currents of the electric machine.
Used technology
The electric machine is a Synchronous Reluctance assisted Permanent Magnet (SRPM) machine. This
technology has several benefits compared to standard permanent magnet (PM) technology and
traditional induction machine (IM) technology. The SRPM technology combines the benefits of PM and
Synchronous 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 field, which in turn rotates
the rotor containing permanent magnets. In the synchronous permanent magnet machine, the rotation
of the rotor (shaft) is synchronized 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
User Guide
EM-PMI540-T1500
Product overview
14 |
©
Danfoss | July 2021
BC265856800806en-000201
