Three-phase electric motors

Three-phase electric motors for reliable industrial drives and high energy efficiency

Three-phase electric motors are at the heart of modern industrial drives and are among the most widely used electric motors in manufacturing, logistics, energy, agriculture and many other industrial sectors. Thanks to their robust construction, high efficiency, long service life and low maintenance costs, they ensure reliable operation even in continuous-duty applications and under high mechanical loads.
At M&M Intercom, we offer a wide selection of three-phase electric motors for a broad range of industrial applications. Our range includes motors with different power ratings, rotational speeds, IEC frame sizes, mounting arrangements and efficiency classes IE2 and IE3, meeting modern requirements for energy efficiency and reliable operation.
We offer electric motors for standard and demanding industrial applications with power ratings from 0.09 kW up to 132 kW, different rotational speeds, voltages of 230/400 V and 400/690 V, and mounting arrangements B3, B5, B14, B35 and others. In addition to our extensive product range, we also provide expert technical advice, assistance in selecting the appropriate electric motor and support in designing new drive systems or upgrading existing ones.

A wide range of three-phase electric motors for all industrial applications

Every industrial machine has specific requirements regarding power, torque, rotational speed and mounting method, so the selection of a three-phase electric motor must be tailored to the particular application.
At M&M Intercom, we offer electric motors for:

• production machinery,
• conveying systems,
• pumps,
• fans,
• compressors,
• mixers,
• gearboxes,
• conveyor belts,
• lifting equipment,
• packaging machinery,
• woodworking machinery,
• agricultural machinery,
• the process industry,
• HVAC systems.

Models are available with different rotational speeds (700, 900, 1,400 and 3,000 rpm), various shaft diameters and numerous IEC frame sizes, enabling easy replacement of existing motors without additional structural modifications.

Why choose a three-phase electric motor

Three-phase electric motors are regarded as the most reliable and efficient solution for industrial drives. Three-phase power supply provides uniform torque, smooth operation and significantly higher efficiency compared with single-phase motors.
Their main advantages include:

• high energy efficiency,
• reliable long-term operation,
• low maintenance costs,
• high starting torque,
• quiet operation,
• long service life,
• robust construction,
• suitability for continuous operation,
• a wide range of power ratings and rotational speeds.

These characteristics make them the standard choice for most industrial drive systems.

IE2 and IE3 energy-efficiency classes

Energy efficiency is becoming one of the most important factors when selecting electric motors, as electricity accounts for a significant share of operating costs.
Our range includes three-phase electric motors in the following classes:

• IE2 – high-efficiency electric motors for standard industrial applications,
• IE3 – premium-efficiency electric motors with lower electricity consumption and reduced operating costs.
• IE4
• Self Power

IE3-class motors can deliver significant energy savings in continuous operation and are an excellent choice for companies seeking to reduce production costs and improve the energy efficiency of their processes.

Different mounting arrangements for easy installation

Different mounting arrangements are available so that the electric motor can be installed easily in a wide range of machines and equipment.
The most commonly supplied mounting arrangements are:

• B3,
• B5,
• B14,
• B35,
• B34.

Standardised IEC dimensions enable quick replacement of an existing electric motor without major machine modifications, significantly shortening servicing time and reducing production downtime.

Electric motors for continuous industrial operation

Industrial machinery often operates 24 hours a day, so three-phase electric motors must be designed for a long service life and high reliability.
Motors from our range are suitable for use in:

• manufacturing,
• metalworking,
• the wood-processing industry,
• the food industry,
• the chemical industry,
• the pharmaceutical industry,
• logistics,
• energy,
• water infrastructure,
• municipal systems.

Their robust construction ensures reliable operation even under demanding working conditions, high loads and frequent starting cycles.

Brake motors and special versions

In addition to standard versions, we also offer three-phase brake motors, which enable the drive to be stopped quickly and safely.
These motors are frequently used in:

• lifting equipment,
• conveying systems,
• packaging lines,
• manipulators,
• automation systems,
• machine tools,
• warehouse equipment.

Special versions are also available for specific industrial requirements where special mounting arrangements, different voltages or customised shaft designs are required.

We work with leading electric motor manufacturers

Manufacturing quality is essential for a long service life and reliable electric motor operation.
At M&M Intercom, we work with renowned international manufacturers, including Motovario and Mosca.
Their electric motors meet international quality standards and provide a long service life, high efficiency and reliable operation in the most demanding industrial environments.

Expert advice when selecting a three-phase electric motor

Selecting the appropriate three-phase electric motor requires a thorough understanding of the entire drive system. In addition to power, rotational speed, starting torque, duty type, cooling method, mounting arrangement, IEC frame size, shaft diameter and efficiency class must also be considered.
The experts at M&M Intercom assist with electric motor sizing, the selection of compatible gearboxes, couplings and drive components, and the optimisation of existing industrial drives. This enables us to provide a solution with a long service life, lower energy consumption and reliable operation.

Why companies choose M&M Intercom for three-phase electric motors

M&M Intercom is a reliable industrial partner in drive technology. In addition to an extensive product range, we provide expert technical support, fast delivery and assistance in selecting optimum solutions for a wide variety of industrial applications.
Our advantages include:

• a wide selection of three-phase electric motors with different power ratings,
• motors in IE2 and IE3 efficiency classes,
• standard IEC versions for quick replacement,
• brake motors and special versions,
• products from leading international manufacturers,
• expert technical advice,
• application-specific selection assistance,
• fast delivery,
• support for designers, machine manufacturers and maintenance professionals.

With our expertise, extensive experience and high-quality product range, we help companies select three-phase electric motors that provide reliable operation, high energy efficiency and a long service life for industrial drive systems.

 

H2: Frequently asked questions about three-phase electric motors

1. What is a three-phase electric motor and when is it used?
A three-phase electric motor is an electric motor that operates on a three-phase alternating-current supply. Its uniform torque, high efficiency and reliable operation make it a standard solution for industrial drives. It is most commonly used for pumps, fans, compressors, conveying systems, gearboxes, machine tools, production lines and agricultural machinery. Compared with single-phase motors, it offers higher power, better efficiency and lower operating costs.
2. How do we select the right three-phase electric motor?
When selecting a three-phase electric motor, several technical parameters must be considered, including the required power (kW), rotational speed, supply voltage, mounting arrangement (B3, B5, B14, B35), IEC frame size, shaft diameter, duty type, load and environmental conditions. It is also important to determine whether the motor will operate continuously or intermittently. At M&M Intercom, we assist with correct motor sizing, because only a properly selected electric motor can provide a long service life and optimum energy consumption.
3. What is the difference between IE2- and IE3-class electric motors?
The IE2 and IE3 classes define the energy efficiency of electric motors. IE2 motors achieve high efficiency and are suitable for many standard applications, whereas IE3 motors consume less electricity, generate lower losses and have lower operating costs. In equipment that operates for many hours each day or continuously, the use of IE3 motors can deliver substantial long-term savings in electricity costs.
4. What do the designations B3, B5, B14 and B35 mean for electric motors?
These designations define the electric motor mounting arrangement. B3 indicates a foot-mounted motor for base mounting, B5 a flange-mounted version with a large flange, B14 a motor with a small flange, and B35 a combination of feet and flange. Selecting the correct version is important for easy installation and complete compatibility with the existing machine or gearbox.
5. What does the IEC frame size of an electric motor mean?
The IEC standard defines the external dimensions of an electric motor, such as shaft centre height, shaft diameter, distances between mounting holes and flange dimensions. Thanks to standardisation, a failed old motor can usually be replaced with a new motor of the same size without major modifications, regardless of the manufacturer. This greatly simplifies servicing and reduces production downtime.
6. Can a three-phase electric motor operate continuously 24 hours a day?
Yes. Most industrial three-phase electric motors are designed for continuous operation (S1 duty), so they can operate 24 hours a day without difficulty, provided they are correctly sized and adequately cooled. Regular maintenance, correct loading and high-quality installation have a significant effect on their service life and reliability.
7. When should a three-phase brake motor be selected?
A brake motor is recommended for applications in which the drive must be stopped quickly and safely after being switched off. Such motors are used in lifting equipment, conveying systems, manipulators, packaging lines, automated production processes and other equipment where precise motion control and increased operational safety are important.
8. How important is correct electric motor power sizing?
An undersized electric motor will be continuously overloaded, causing overheating, increased energy consumption and a shorter service life. An oversized electric motor, however, often operates at low efficiency and unnecessarily increases investment and operating costs. It is therefore advisable for a specialist to determine the motor power on the basis of actual loads and operating conditions.
9. Which brands of three-phase electric motors does M&M Intercom offer?
At M&M Intercom, we offer high-quality three-phase electric motors from renowned manufacturers, including WEG, Siemens, Bonfiglioli, Motovario, Mosca, Cemer, MGM, Regal, Electroprecizia, SEW, STM and OMEC, as well as others. All motors meet international quality standards, provide a long service life and ensure reliable operation even under demanding industrial conditions.
10. Why choose M&M Intercom for the supply of three-phase electric motors?
M&M Intercom offers its customers much more than the sale of electric motors. We provide expert technical advice, assistance in selecting the appropriate power rating, rotational speed, mounting arrangement and efficiency class, as well as help in choosing compatible gearboxes, couplings and other drive components. With a broad range of high-quality three-phase electric motors, fast delivery and many years of experience in drive technology, we help companies increase production reliability, reduce energy consumption and ensure efficient long-term operation of industrial drive systems.

 

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Telephone: +386 1 29 27 960