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Brushless Surface Mounted PMSM Motor Low Speed Waterproof Natural Cooling

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Brushless Surface Mounted PMSM Motor Low Speed Waterproof Natural Cooling

Country/Region china
City & Province qingdao shandong
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Product Details

Low Speed Waterproof Natural Cooling Brushless Surface Mounted PMSM Motor

 

Rare earth permanent magnet motor is a new type of permanent magnet motor that appeared in the early 1970s. Due to the excellent magnetic properties of rare earth permanent magnet materials, they can establish a strong permanent magnetic field without external energy after magnetization. Rare earth permanent magnet motor not only has high efficiency but also has a simple structure and reliable operation. It can also be small in size and light in weight. Made into special motors that can meet specific operating requirements, such as elevator traction motors, special motors for automobiles, etc. The combination of rare earth permanent magnet motors with power electronics technology and microcomputer control technology has improved the performance of the motor and transmission system to a new level. Improving the performance and level of the supporting technical equipment is an important development direction for the motor industry to adjust the industrial structure.

 

Rare earth permanent magnet motors are widely used in almost every field of aviation, aerospace, national defense, equipment manufacturing, industrial and agricultural production, and daily life. It includes permanent magnet synchronous motors, permanent magnet generators, DC motors, brushless DC motors, AC permanent magnet servo motors, permanent magnet linear motors, special permanent magnet motors, and related control systems, covering almost the entire motor industry.

 
Detailed pictures
How Do The Permanent Magnet Motor Work?
 
The defining feature of PMACMs – the permanent magnets within their rotor – are acted upon by the rotating magnetic field (RMF) of the stator windings, and are repelled into rotational motion. This is a deviation from other rotors, where the magnetic force must be induced or generated in the rotor housing, requiring more current. This means that PMACMs are generally more efficient than induction motors, as the rotor’s magnetic field is permanent and does not need a source of power to be used for its generation. This also means that they require a variable frequency drive (VFD, or PM drive) to operate, which is a control system that smooths out the torque produced by these motors. By switching the current on and off to the stator windings at certain stages of rotor rotation, the PM drive simultaneously controls torque and current and uses this data to calculate rotor position, and therefore the speed of the shaft output. They are synchronous machines, as their rotational speed matches the speed of the RMF. These machines are relatively new and are still being optimized, so the specific operation of any one PMACM is, for now, essentially unique to each design.

 

The characteristics and advantages of permanent magnet motors

Motor from the source of excitation can be divided into two categories: permanent magnet motor, and electric excitation motor. A permanent magnet motor is an electric motor that produces an excitation magnetic field from a permanent magnet. The most widely used three-phase asynchronous motors in industry and civil use, such as Y-Series, Y2-Series, YE2-Series, YX3 Series, Series YB, series YB2 series, etc. all belong to electric excitation motors. ENNENG Motor products are ultra-efficient permanent magnet synchronous motors.

 

Compared with traditional electric excitation motors, permanent magnet motors, especially rare earth permanent magnet motors, have the advantages of simple structure, reliable operation, small size, lightweight, small loss and high efficiency, and flexible and diverse shape and size of the motor. The application is extremely wide, covering almost all areas of aerospace, national defense, industrial and agricultural production, and daily life.

 

The permanent magnet synchronous motor has the following characteristics:

  • Rated efficiency is 2% to 5% higher than normal asynchronous motors;
  • The efficiency rises rapidly with the increase of the load. When the load changes within the range of 25% to 120%, it maintains high efficiency. The high-efficiency operating range is much higher than that of ordinary asynchronous motors. Light-load, variable-load, and full-load all have significant energy-saving effects;
  • Power factors up to 0.95 and above, no reactive compensation required;
  • The power factor is greatly improved. Compared with asynchronous motors, the running current is reduced by more than 10%. Due to the decrease in operating current and system losses, energy-saving effects of about 1% can be achieved.
  • Low-temperature rise, high power density: 20K lower than three-phase asynchronous motor temperature rise, design temperature rise is the same and can be made into a smaller volume, saving more effective materials;
  • High starting torque and high overload capacity: according to requirements, it can be designed with high starting torque (3-5 times) and high overload capacity;
  • The variable frequency speed control system is used, which is better in dynamic response and better than that of asynchronous motors.
  • The installation dimensions are the same as the asynchronous motors currently widely used, and the design and selection are very convenient.
  • Due to the increase in power factor, the visual power of the power supply system transformer is greatly reduced, which improves the power supply capacity of the transformer, and can also greatly reduce the cost of the system cable (new project);
  • When the new project is built, all the drive systems use permanent magnet synchronous motors, the project investment is basically the same as the use of asynchronous motors, and the project can continue to obtain energy-saving benefits after the project is put into operation;

In the general industrial sector, the replacement of low-voltage(380/660/1140V) high-efficiency asynchronous motors, the system saves 5% to 30% energy, and the high-voltage(6kV/10kV) high-efficiency asynchronous motors, system saves 2% to 10%.

 

Application:

Permanent magnet synchronous motors can be combined with frequency converters to form the best open-loop step-less speed control system, which has been widely used for speed control transmission equipment in petrochemical, chemical fiber, textile, machinery, electronics, glass, rubber, packaging, printing, paper making, printing and dyeing, metallurgy and other industries.

The rotor magnetic circuit structure of the permanent magnet synchronous motor is different, so the operation characteristics and control system of the motor are also different. According to the different positions of the permanent magnets on the rotor, permanent magnet synchronous motors can be mainly divided into the surface type and interior type. In the surface-type permanent magnet synchronous motor, the permanent magnets are usually tile-shaped and located on the outer surface of the rotor core. The important feature of this motor is that the main inductances of the straight and orthogonal axes are equal; the interior permanent magnet is located inside the rotor, and there is a pole piece made of ferromagnetic material between the outer surface of the permanent magnet and the inner circle of the stator core, which can protect the permanent magnet. The important feature of this permanent magnet motor is that the main inductances of the straight and quadrature axes are not equal. Therefore, the performance of these two motors is different.

 

I. Overview

The motor is excited by rare earth neodymium iron boron permanent magnet materials, and is supplied with permanent magnet special frequency converter. It has the characteristics of large starting torque, wide speed range, compact structure, small size, light weight, low noise, high power factor, and high efficiency. It is an ideal power choice for high-efficiency and energy-saving air compressors. The technical requirements and parameters are as follows:

 

Rated speed (r/min)3000,3600,1000
Frequency(Hz)150,200,240
Power range(kW)7.5~200
Cooling typeIC411(Self-fan cooling),IC416

 

1. The motor can operate normally under the following conditions:

1.1 The ambient temperature does not exceed 40℃;

1.2 Relative humidity ≤90%;

1.3 The altitude does not exceed 1000m.

2. The rated voltage of the motor is 380V, also according to user requirements.

3. The reference work system of the motor: S1.

4. Insulation grade: F grade.

5. Protection level: IP55.

6. Motor structure and installation type: B3, B35.

7. The motor outlet is located on the top of the base, or it can be located on the right or left of the base according to user requirements.

8. Motor service factor: 1.15, 1.2 (or as per technical agreement).

 

II. Inspection

 

1. Before use, please carefully check the appearance of the motor for damage during transportation, and check whether the nameplate parameters (power, voltage, speed, etc.) are consistent with the order.

 

2. Check whether the fasteners of the motor are loose.

 

3. Turn the motor shaft by hand to see if there is any jamming.

 

III. Operation and use

 

1. Before the motor is energized, confirm the rotation direction of the motor, and check whether the mechanical installation and electrical connection are safe and reliable.

 

2. If abnormal noise or vibration is found in the motor during operation, please stop the operation immediately and cut off the power supply. Check the motor and compressor, and put it into operation again after troubleshooting.

 

3. If the temperature rise of the motor is found to be abnormal during operation, please stop the motor and cut off the power immediately, check the motor and the compressor, and then put it into use again after troubleshooting.

 

IV. Maintenance

 

1. Please carry out regular maintenance of the bearing strictly in accordance with the bearing lubrication indication plate. The motor should be refilled with grease immediately after running for about 2000 hours, and the grease brand must be carefully identified before refilling. When the bearing is found to be overheated or the grease is degraded during operation, it should be replaced in time. The old grease should be removed when replacing, and the bearing and the inner and outer cover oil chambers of the bearing should be cleaned with gasoline, and then clean grease of the same brand should be added. Motor with a speed of 3000rpm and above, the amount of refueling: the bearing cavity is filled, the amount of grease added to the oil chamber of the bearing inner cover accounts for 1/2 of the oil chamber, the remaining speed motor refueling amount: the bearing inner cavity is filled, and the bearing inner cover oil chamber is filled The amount of grease occupies 2/3 of the oil chamber.

 

2. When replacing the bearing, a special bearing disassembly tool must be used to pull the bearing from the motor shaft, and the disassembly force must not be directly applied to the motor shaft. When installing a new bearing, the hot sleeve method should be used to install the bearing. After the bearing is heated to 90°C, the bearing sleeve should be placed on the bearing position on the shaft.

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