Excited Synchronous Motor

Excited Synchronous Motor

An excited synchronous motor is a high-performance electric motor that operates at a constant speed, regardless of load variations, due to its synchronous speed characteristic. It uses an external DC power source to excite the rotor windings, creating a strong magnetic field that enables precise control over torque and speed. This motor is ideal for applications requiring high efficiency, reliability, and precise control, such as in industrial machinery, pumps, and compressors. Its robust design ensures long-lasting performance in demanding environments.
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excited synchronous motor

Precise speed control:The excitation synchronous motor has a constant operating speed and can accurately maintain operation at synchronous speed and is not affected by load changes. This characteristic makes it ideal for applications requiring highly precise speed control, such as industrial automation and high-precision machining equipment. Since the rotational speed of the motor is directly related to the power frequency, the motor can maintain a stable rotational speed no matter how the load changes, which is crucial to improving the efficiency and production quality of the equipment.

High performance operation:Excitation synchronous motors generally have high energy efficiency and can effectively convert electrical energy into mechanical energy. Its design uses optimized electromagnetic structure and efficient winding configuration to minimize energy loss. For equipment that operates continuously for long periods of time, excitation synchronous motors can significantly reduce energy consumption and thus reduce operating costs. At the same time, due to its high energy efficiency, this motor can provide stable and reliable power output while reducing energy consumption, and is especially suitable for applications that require stable operation for a long time.

High torque output:Since the excitation synchronous motor can adjust the excitation current through an external DC power supply, it can provide high starting torque when starting. This high torque output makes it particularly suitable for applications where initial inertia or heavy loads need to be overcome, such as large-scale industrial equipment, compressors and pumps. In these applications, high torque output not only improves the starting performance of the equipment, but also ensures the smooth operation of the equipment under various working conditions.

Stability and reliability:Excitation synchronous motors are known for their excellent stability and reliability. Due to the synchronous characteristics of the motor, it will not produce speed fluctuations when the load changes, thus ensuring the stability of the system. In addition, its sturdy structure and use of high-quality materials enable the motor to operate reliably for a long time in harsh working environments, reducing equipment failure rates and maintenance needs. Especially in critical industrial applications that require high reliability, the stability of excitation synchronous motors is particularly important.

Flexible excitation control:The excitation synchronous motor adjusts the excitation current of the rotor through an external excitation device, which can flexibly control the power factor of the motor. This characteristic allows the motor to adapt to different working conditions, either operating at low power factor or optimizing the power quality of the grid under high power factor conditions. This flexible excitation control makes the excitation synchronous motor widely applicable in different industrial applications, while also being able to meet complex power system requirements.

excited synchronous motor
excited synchronous motor
excited synchronous motor

 

 

Technical specifications

 

 

Parameter Specification
Rated Power 150 kW
Rated Voltage 400 V
Rated Current 280 A
Rated Speed 1500 RPM
Frequency 50/60 Hz
Power Factor 0.8 (adjustable via excitation control)
Excitation Voltage 220 V DC
Excitation Current 10 A
Efficiency 96%
Insulation Class F
Cooling Method IC 411 (self-cooled with external fan)
Rotor Type Salient pole
Mounting Type Horizontal
Bearing Type Anti-friction bearings
Protection Class IP55
Weight 1500 kg
Dimensions (LxWxH) 1800 mm x 900 mm x 1200 mm
Vibration Level Complies with ISO 10816
Noise Level < 75 dB at 1 meter
Duty Type S1 (continuous duty)

 

 

 

Application areas of excited synchronous motor
 
Mechanical Drives – Industrial Maintenance – Northeast Tech

Industrial Drive and Mechanical Applications:
Excited synchronous motors are widely used in industrial drive and mechanical applications, and are particularly suitable for equipment that requires precise speed control and high torque output. This type of motor is often used in industrial equipment such as rolling mills, papermaking machinery, and printing equipment, which require extremely high speed stability of the motor. Since the motor can maintain a constant synchronous speed without speed fluctuations even when the load changes, it can ensure the smooth operation of the equipment and the consistency of product quality during the production process. In addition, the high efficiency and reliability of this motor make it an ideal choice for equipment that needs to run continuously for a long time, such as large compressors and pump systems. Its application in these fields not only improves production efficiency, but also reduces energy consumption and maintenance costs.

Power System and Energy Management:
In the field of power system and energy management,synchronous motors play a key role, especially in reactive power compensation and grid stability improvement. They are often used as synchronous condensers to optimize the power factor of the power system by accurately adjusting the excitation current, thereby improving the power quality and reducing power losses. This type of motor is particularly important in large power transmission networks, which can effectively compensate for reactive power, stabilize voltage, and ensure efficient operation of the power grid. In addition, in renewable energy facilities such as wind power stations and hydroelectric power stations, excitation synchronous motors are also widely used to ensure the stable output of power generation equipment and the reliable operation of the power grid. These applications demonstrate the versatility and high applicability of excitation synchronous motors in complex power systems, further promoting the improvement of energy management and power efficiency.

Energy management with VFDs

 

 

 

Installation Method:
 

 

Structure and installation type
(IM code))
IM B3 IM B8 IM B5 IM B6 IM V5 IM V1 IM B7 IM V6 IM V3
Installation diagram productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400
Frame size 63-450 63-160 63-280 63-160 63-160 63-450 63-160 63-160 63-160
Structure and installation type
(IM code))
IM V37 IM V17 IM B34 IM V19 IM V18 IM B14 IM V35 IM V15 IM B35
Installation diagram productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400 productcate-400-400
Frame size 63-132 63-13 63-132 63-132 63-132 63-132 63-160 63-160 63-450

 

 

 

 

 

 

 
FAQ

1: How does this motor perform in terms of precise speed control?
This motor excels at precise speed control. Since its operating speed is synchronized with the power frequency, the motor maintains a constant speed regardless of load changes. This makes it ideal in applications that require precise speed control to ensure stable operation of the equipment under different operating conditions, thus improving the quality and consistency of the production process.

2: What is the energy efficiency of this motor? 
The motors are designed with great emphasis on energy efficiency and often have high efficiency ratings. This means that it can effectively convert more electrical energy into mechanical energy during operation, thereby reducing energy waste and heat loss. For equipment that runs continuously for a long time, using this kind of motor can significantly reduce power costs and help companies achieve higher energy utilization.

3: How durable is this motor in harsh environments?
This motor adopts a sturdy and durable structural design and can operate reliably for a long time under harsh environmental conditions. The outer casing is usually made of high-strength materials that can withstand the effects of mechanical impact, dust, moisture and other environmental factors. At the same time, key components inside the motor, such as the stator and rotor, have also been optimized to enhance their ability to withstand high temperatures and corrosion. This allows the motor to maintain efficient performance in harsh environments, reducing failure rates and maintenance requirements.

4: What is the starting torque performance of this motor?
The starting torque of this motor is very strong and is particularly suitable for applications requiring high initial torque. By adjusting the excitation current, additional torque support can be provided at start-up, which is crucial to overcome inertia and heavy loads at start-up. Therefore, it is very popular in applications requiring high torque such as large compressors, heavy machinery, etc.

5: How is this motor used in energy management?
In energy management, this motor is often used as a synchronous condenser to regulate the power factor and stabilize the grid voltage. By precisely controlling the excitation current, it compensates for reactive power, thereby optimizing the overall efficiency of the power system. This is particularly important in large power transmission networks and renewable energy facilities, helping to improve power transmission efficiency and reduce power losses.

6: What are the maintenance requirements for this motor?
Due to the brushless design and high-quality materials of this motor, its maintenance requirements are relatively low. The brushless design reduces the risk of mechanical wear, while high-quality construction materials ensure the long-term reliability of the motor. Even in harsh industrial environments, the motor can maintain stable operation for a long time, reducing downtime and maintenance costs.

7: Does this motor support flexible installation methods?
Yes, this motor is designed with different installation needs in mind and offers a variety of mounting options, such as flange mounting and foot mounting. This flexibility allows the motors to be easily integrated into different systems and equipment, whether in machinery on production lines or in industrial environments where compact installation is required to meet user needs.

 

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