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IP54 IP55 380V PMAC Motor High Power Water Cooled

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IP54 IP55 380V PMAC Motor High Power Water Cooled

Country/Region china
City & Province qingdao shandong
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Product Details

High Power Water Cooled IP54 IP55 380v PMAC Motor 

 

Energy efficiency standardscomply with GB30253-1 gradeWork modeS1
Installation dimensionscomply with IEC standardControl modevariable frequency vector control
Power range7.5 160kWGoverning rangeconstant torque: 03000r/min
weak field: 3000
3600r/min
Cooling wayIC411 (fan cooling)Governing rangeconstant torque: 01500r/min
weak field: 1500
1800r/min
Power range7.5 250kWOptional partsEncoder, spiral transformer, PTC, PT100
Cooling wayIC416 (independent axial flow fan)Wiring typejunction box (aviation plug can be customized as per requirement)
Insulation classFService factorStandard 1, 2 (customized as per requirement)
Protection gradeIP54 (IP23 customizable)installationIMB3 IMB5 IMB35

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.

 

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.

 

Due to the use of permanent magnets to provide magnetic fields, the rotor process is mature, reliable, and flexible in size, and the design capacity can be as small as tens of watts, up to megawatts. At the same time, by increasing or decreasing the number of pairs of rotor permanent magnets, it is easier to change the number of poles of the motor, which makes the speed range of permanent magnet synchronous motors wider. With multi-pole permanent magnet rotors, the rated speed can be as low as a single digit, which is difficult to achieve by ordinary asynchronous motors.

Especially in the low-speed high-power application environment, the permanent magnet synchronous motor can be directly driven by a multi-pole design at low speed, compared with an ordinary motor plus reducer, the advantages of a permanent magnet synchronous motor can be highlighted.

 

Detailed pictures
 
How does the permanent magnet motor work?

There are many types of permanent magnet synchronous motors, which can be divided into sine wave permanent magnet synchronous motors and trapezoidal wave permanent magnet synchronous motors according to the waveform of the stator winding induced electromotive force. In the structure of touch screen maintenance in the composition of machine tool equipment, the stator of the sine wave permanent magnet synchronous motor used is composed of three-phase windings and iron cores. The armature windings are often connected in a Y-shape and short-distance distributed windings are used: the air gap field is designed as a sine wave, to generate a sine wave counter electromotive force; the rotor uses permanent magnets instead of electric excitation.

 

1. Motor control method

At present, there are mainly two control methods for three-phase synchronous motors, one is another control type (also known as frequency open-loop control); the other is a self-control type (also known as frequency closed-loop control). The other control method mainly adjusts the speed of the rotor by independently controlling the frequency of the N#I-part power supply. It does not need to know the position information of the rotor, and an open-loop control scheme with a constant voltage-frequency ratio is often used. The self-controlled permanent magnet synchronous motor also adjusts the rotor speed by changing the frequency of the external power supply. Unlike the other control type, the change in the frequency of the external power supply is related to the position information of the rotor. The higher the rotor speed, the higher the stator energization frequency. The rotor speed is adjusted by changing the frequency of the applied voltage (or current) to the stator winding.

Because the self-controlled synchronous motor does not have the out-of-step and oscillation problems of the other-controlled synchronous motor, and the permanent magnet of the permanent magnet synchronous motor does not have brushes and commutators, which reduces the volume and quality of the rotor and improves the Response speed and speed range of the system, so we use a self-controlled AC permanent magnet synchronous motor. When the three-phase symmetrical power supply is added to the three-phase symmetrical winding, a synchronous rotating stator magnetic field will naturally be generated. The rotational speed of the synchronous motor rotor is strictly synchronized with the frequency of the external power supply and has nothing to do with the size of the load.

 

2. The principle of PMM motor

The working principle of pmsm motor is the same as that of the synchronous motor. PMSMs are widely used now, and like induction motors, they have commonly used AC motors. The characteristics are: during steady-state operation, there is a constant relationship between the rotor speed and the grid frequency n=ns=60f/p, and ns is called synchronous speed. If the frequency of the power grid is constant, the speed of the synchronous motor is constant at a steady state regardless of the size of the load.

Operating as a generator is the most important operating mode of a synchronous motor, and operating as a motor is another important operating mode of a synchronous motor. The power factor of the synchronous motor can be adjusted. In the occasions where speed regulation is not required, the application of a large synchronous motor can improve the operating efficiency. In recent years, small synchronous motors have been used in variable frequency asynchronous motors, also known as induction motors, which are AC motor that generates electromagnetic torque through the interaction of the air gap rotating magnetic field and the induced current of the rotor winding, thereby realizing the conversion of electromechanical energy into mechanical energy.

 

The working process of PM Motor is as follows:

① Establishment of the main magnetic field of the pm motors: The excitation winding is supplied with a DC excitation current to establish an excitation magnetic field between polarities, that is, the main magnetic field is established.

② Current-carrying conductor of pm motors: The three-phase symmetrical armature winding acts as a power winding and becomes the carrier of induced potential or induced current.

③ Cutting motion of pm motors: the prime mover drags the rotor to rotate (input mechanical energy to the motor), and the excitation magnetic field between polarities rotates with the shaft and cuts the stator winter phase winding in sequence (equivalent to the conductor of the winding reverse cutting the excitation field )

④ Generation of alternating potential of pm motors: Due to the relative cutting motion between the armature winding and the main magnetic field, a three-phase symmetrical alternating potential with periodic changes in size and direction will be induced in the armature winding. AC power can be provided through the lead wire.

⑤ Alternation and symmetry of pm motors: Due to the alternating polarity of the rotating magnetic field, the polarity of the induced potential is alternated, and the three-phase symmetry of the induced potential is guaranteed due to the symmetry of the armature winding.

 

Permanent magnet AC (PMAC) motors have a wide range of applications including:

 

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.

 

Permanent magnet synchronous motors with internal magnets: Maximum energy efficiency

The permanent magnet synchronous motor with internal magnets (IPMSM) is the ideal motor for traction applications where the maximum torque does not occur at maximum speed. This type of motor is used in applications that require high dynamics and overload capacity. And it is also the perfect choice if you want to operate fans or pumps in the IE4 and IE5 range. The high purchase costs are usually recouped through energy savings over the run time, provided that you operate it with the right variable frequency drive.

 

Our motor-mounted variable frequency drives use an integrated control strategy based on MTPA (Maximum Torque per Ampere). This allows you to operate your permanent magnet synchronous motors with maximum energy efficiency. The overload of 200 %, the excellent starting torque, and the extended speed control range also allow you to fully exploit the motor rating. For fast recovery of costs and the most efficient control processes.

 

Permanent magnet synchronous motors with external magnets for classic servo applications

Permanent magnet synchronous motors with external magnets (SPMSM) are ideal motors when you need high overloads and rapid acceleration, for example in classic servo applications. The elongated design also results in low mass inertia and can be optimally installed. However, one disadvantage of the system consisting of SPMSM and variable frequency drive is the costs associated with it, as expensive plug technology and high-quality encoders are often used.

 

What factors need to be considered when choosing the motor for air compressor?

When buying a permanent magnet motor for an air compressor, there are several factors that need to be considered. These include the motor’s power rating, speed, efficiency, and durability. You should also consider the type of air compressor you have and the specific application for which you will be using the motor.

 

For example, if you have a small air compressor that is used for light-duty applications, you may not need a high-powered motor. However, if you have a large air compressor that is used for heavy-duty applications, you will need a motor with a higher power rating and greater durability.

In addition to these factors, you should also consider the cost of the motor and its overall value for money. You may also want to look for motors that are energy-efficient and environmentally friendly.

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