12-3000kw High Power Permanent Magnet Motor For Ball Mill
Brand Name:ENNENG
Certification:CE,UL
Model Number:PMM
Minimum Order Quantity:1 set
Delivery Time:15-120 days
Payment Terms:L/C, T/T
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Qingdao Shandong China
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No. 18, Xinye Road, High-Tech Zone, Qingdao,Shandong, China
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12-3000kw High Power Permanent Magnet Motor For Ball Mill
What Is The Permanent Magnet Synchronous Motor?
The Permanent Magnet Synchronous Motor (PMSM) is a type of electric
motor that operates using permanent magnets embedded in its rotor.
It is also sometimes referred to as a brushless AC motor or a
synchronous permanent magnet motor.
In a PMSM, the stator (the stationary part of the motor) contains a
series of coils that are energized in a sequence to create a
rotating magnetic field. The rotor (the rotating part of the motor)
contains a series of permanent magnets that are arranged to produce
a magnetic field that interacts with the magnetic field produced by
the stator.
As the two magnetic fields interact, the rotor rotates, producing
mechanical energy that can be used to power machinery or other
devices. Because the permanent magnets in the rotor provide a
strong, constant magnetic field, PMSMs are highly efficient and
require less energy to operate than other types of electric motors.
PMSMs are used in a wide variety of applications, including
electric vehicles, industrial machinery, and household appliances.
They are known for their high efficiency, low maintenance
requirements, and precise control, which makes them a popular
choice for many different types of systems.
Analysis of the principle of the technical advantages of permanent
magnet motor:
The principle of a permanent magnet synchronous motor is as
follows: In the motor's stator winding into the three-phase
current, after the pass-in current, it will form a rotating
magnetic field for the motor's stator winding. Because the rotor is
installed with the permanent magnet, the permanent magnet's
magnetic pole is fixed, according to the principle of magnetic
poles of the same phase attracting different repulsion, the
rotating magnetic field generated in the stator will drive the
rotor to rotate, The rotation speed of the rotor is equal to the
speed of the rotating pole produced in the stator.
Detailed pictures:
The development trend of rare earth permanent magnet motors:
Rare earth permanent magnet motors are developing towards high power (low speed, high torque), high functionality, and miniaturization, and are constantly expanding new motor varieties and application fields, and the application prospects are very optimistic. In order to meet the needs, the design and manufacturing process of rare earth permanent magnet motors still need to be continuously innovated, the electromagnetic structure will be more complex, the calculation structure will be more accurate, and the manufacturing process will be more advanced and applicable.
Application of rare earth permanent magnet motor:
Due to the superiority of rare earth permanent magnet motors, their applications are becoming more and more extensive. The main application areas are as follows:
Focus on the high efficiency and energy saving of rare earth permanent magnet motors. The main application objects are large power consumers, such as rare earth permanent magnet synchronous motors for textile and chemical fiber industries, rare earth permanent magnet synchronous motors for various mining and transportation machinery used in oil fields and coal mines, and rare earth permanent magnet synchronous motors for driving various pumps and fans.
Classification:
Depending on how magnets are attached to the rotor and the design
of the rotor, permanent magnet synchronous motors can be classified
into two types:
Surface permanent magnet synchronous motor (SPMSM)
Interior permanent magnet synchronous motor (IPMSM).
SPMSM mounts all magnet pieces on the surface, and IPMSM places
magnets inside the rotor.
The SPMSM, or non-salient pole synchronous motor, features a rotor
with a surface-mounted permanent magnet and a symmetrical magnetic
circuit in both the quadrature and direct axes. On the other hand,
the IPMSM, or salient pole synchronous motor, has a rotor with a
permanent magnet embedded in the iron core. It possesses an
asymmetric rotor magnetic circuit that generates additional
reluctance electromagnetic torque, resulting in a high power
density. Moreover, it offers a wide field weakening range, making
it suitable for high-speed motor operations.
The SPMSM and IPMSM differ in terms of rotor structures and
magnetic circuits, leading to varied performances. Compared to the
SPMSM, the IPMSM exhibits higher efficiency, greater cogging
electromagnetic torque ripples, and lower losses at high
temperatures. However, the IPMSM also experiences higher-frequency
harmonics, which can cause eddy current losses in both the stator
and the rotor.
When designed to operate with a fixed frequency power source, all
the mentioned types of synchronous motors are equipped with a
damper winding, similar to the squirrel-cage winding of an
induction motor. This damper winding is utilized for starting the
machine as an induction motor and also serves the purpose of
reducing hunting oscillations that can occur during transient
operations. However, when the motor is supplied with a variable
frequency source capable of seamless frequency variation from zero
to the rated value, the damper winding is not necessary for
starting. Its requirement may arise in certain cases to dampen
hunting oscillations or serve other specific purposes.
12-3000kw High Power Permanent Magnet Motor For Ball Mill
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