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IE5 Energy Saving 5kw-2mw Three Phase Permanent Magnet Motor
What Is The Permanent Magnet Synchronous Motor?
The PERMANENT MAGNET SYNCHRONOUS MOTOR is mainly composed of the
stator, rotor, chassis, front-rear cover, bearings, etc. The
structure of the stator is basically the same as that of ordinary
asynchronous motors, and the main difference between the permanent
magnet synchronous motor and other kinds of motors is its rotor.
The permanent magnet material with pre-magnetized (magnetic
charged) magnetic on the surface or inside the permanent magnet of
the motor, provides the necessary air gap magnetic field for the
motor. This rotor structure can effectively reduce the motor
volume, reduce loss and improve efficiency.
Structure of the IPM (interior permanent magnet) motor
A conventional SPM (surface permanent magnet) motor has a structure
in which a permanent magnet is attached to the rotor surface. It
only uses magnetic torque from a magnet. On the other hand, the IPM
motor uses reluctance through magnetic resistance in addition to
magnetic torque by embedding a permanent magnet in the rotor
itself.
SPM vs IPM Motor Rotor Structure
IPM (Interior Permanent Magnet) Motor Features
High torque and high efficiency
High torque and high output are achieved by using reluctance torque
in addition to magnetic torque.
Energy-saving operation
It consumes up to 30% less power compared to conventional SPM
motors.
High-speed rotation
It can respond to high-speed motor rotation by controlling the two
types of torque using vector control.
Safety
Since the permanent magnet is embedded, mechanical safety is
improved as, unlike in an SPM, the magnet will not detach due to
centrifugal force.
Vector Control Features
While a conventional system (120-degree conduction system) has the
current impressed in the motor as a square wave, a vector control
impresses voltage which turns into a sine wave towards the rotor's
position (angle of the magnet), so it becomes possible to control
the motor current.
Working of Permanent Magnet Synchronous Motor:
The working of the permanent magnet synchronous motor is very
simple, fast, and effective when compared to conventional motors.
The working of PMSM depends on the rotating magnetic field of the
stator and the constant magnetic field of the rotor. The permanent
magnets are used as the rotor to create constant magnetic flux and
operate and lock at synchronous speed. These types of motors are
similar to brushless DC motors.
The phasor groups are formed by joining the windings of the stator
with one another. These phasor groups are joined together to form
different connections like a star, Delta, and double and single
phases. To reduce harmonic voltages, the windings should be wound
shortly with each other.
When the 3-phase AC supply is given to the stator, it creates a
rotating magnetic field and the constant magnetic field is induced
due to the permanent magnet of the rotor. This rotor operates in
synchronism with the synchronous speed. The whole working of the
PMSM depends on the air gap between the stator and rotor with no
load.
If the air gap is large, then the windage losses of the motor will
be reduced. The field poles created by the permanent magnet are
salient. The permanent magnet synchronous motors are not
self-starting motors. So, it is necessary to control the variable
frequency of the stator electronically.
The rotor pole of the rare earth permanent magnet motor is composed
of rare earth permanent magnet steel, so there is no slip, no
excitation current, and the rotor has no fundamental wave iron and
copper wear.
The rotor is excited by permanent magnets, and no reactive
excitation current is needed. Therefore, the power factor is
improved, the reactive power is reduced, the stator current is
greatly reduced, and the stator copper and iron losses are greatly
reduced.
At the same time, because the polar arc coefficient of the rare
earth permanent magnet motor is larger than that of the
asynchronous motor when the voltage and the stator structure are
constant, the average magnetic induction intensity of the motor is
smaller than that of the asynchronous motor and the iron loss is
small.
Therefore, it can be said that the rare earth permanent magnet
synchronous motor is energy-saving by reducing its own losses, and
is not affected by changes in operating conditions, environment,
and other factors.
Company Profile:
Qingdao Enneng Motor Co., Ltd. is referred to as "ENNENG". ENNENG is a technology-based enterprise integrating R&D, design, and manufacture of high-efficiency permanent magnet motors and permanent magnet generators. The company has dozens of patented technologies and is a permanent member of the Qingdao Motor Association.
The company's products cover permanent magnet generators, wind-driven generators, hydro generators, wave power generators, permanent magnet motors, low-speed high-torque motors, PMAC motors, and PMDD motors. All of our products are rare-earth permanent magnet products, having high performance and high efficiency.
The company has always adhered to the corporate tenet of "integrity, pragmatism, efficiency, and win-win", providing customers with high-quality products and pragmatic and honest products and services. At present, ENNENG permanent magnet motor products have been successfully applied to major national engineering projects in petrochemical, rubber, oil fields, ports, water affairs, water conservancy, iron and steel, mining, and other industries, saving a lot of energy for major factories and mining enterprises.
In the international market, it has exported a number of permanent magnet generators matched with wind and hydropower generation in Thailand, Congo, Zambia, Guatemala, Italy, Egypt, and other countries.
