Electric motors and machines

High efficiency and overload capacity

VEM IE5 synchronous reluctance motors (SynRM) achieve extremely high efficiency across their entire operating range. The motors reach the highest currently defined efficiency class “IE5” (according to IEC-TS 60034-30-2), not only at the rated point but also within a wide range extending from half the rated output up to twice the rated speed.

Reluctance motor is always used with a frequency inverter

VEM reluctance motors are compatible with frequency inverters from all manufacturers suitable for this purpose. We can supply either motors only for your application, or a complete SynRM package solution with a frequency inverter. Motor parameters can be preloaded into the inverter, making the drive ready for immediate installation on site. Our product range also includes SynRM High-speed motors that can run at speeds up to 8000 rpm.

When selecting an inverter type with higher current capacity, the motors can be overloaded with at least 30% higher torque while still maintaining at least IE4 efficiency level. In addition, all motors are capable of operating in the field-weakening range up to 3600 rpm.

Example packages VEM SynRM + Yaskawa inverter

• VEM IE5-RS1R 112 MX4 4.0 kW, 1500 rpm, 25.5 Nm, 9.4 A, 360 V + Yaskawa GA500 series GA50C4012EBA, 11.9 A
• VEM IE5-R43R 225 M4 45 kW, 1500 rpm, 286.5 Nm, 88 A, 390 V + Yaskawa GA700 series GA70C4089BBA, 89.2 A

Power as needed

Many processes do not require continuous full power. For example, compressed air is only needed intermittently. However, motors in many applications run continuously at constant speed. Often the motor is running all the time, consuming large amounts of energy without producing useful output. The IE5 SynRM combined with a frequency inverter eliminates these problems.

This solution can replace conventional pump, fan, and compressor motors, and is also suitable for more demanding applications such as extruders, mixers, winches, and conveyors. A standard motor can be easily replaced by an IE5 SynRM without mechanical modifications. The sizes and output ratings of IE5 SynRMs comply with common standards.

Advantages of VEM IE5 SynRM

• With automation and a frequency inverter, the motor can run at the right speed at the right time, consuming energy only when required.
• In many cases, a smaller motor can be selected due to shorter duty cycles.
• Lower bearing and winding temperatures increase reliability and service life.
• Operating noise is lower than that of conventional motors, improving workplace acoustics.

The secret lies in the rotor

The synchronous reluctance motor differs from a conventional squirrel-cage motor in its rotor design. Instead of a squirrel-cage rotor, the SynRM rotor consists only of a laminated steel core with a special geometry, mounted on the shaft. Therefore, there are no permanent magnets, and no copper or aluminum squirrel-cage bars in the rotor. Unlike squirrel-cage motors, SynRMs cannot be operated directly from the mains supply – they must always be driven by a frequency inverter. The Yaskawa GA500 inverter is one suitable option for controlling a synchronous reluctance motor.

Electric motors at the core of climate action

In an electrifying world, the great challenge is to stop climate change. Global warming can only be mitigated by reducing emissions, and electric motors have a crucial role to play. Electric motors consume more than 53% of the world’s electrical energy (according to IAE) and their total number is expected to double by 2040. With high-efficiency motors, energy consumption can be reduced significantly. This makes every motor choice both an economic and an ecological decision – one that contributes to sustainable development.

Technical data of VEM IE5 Synchronous Reluctance Motors (SynRM)

• Output power: 0.75 – 55 kW
• Rated torque: 7.2 – 525 Nm
• Frame sizes: IEC 80 – 225
• Current: 1.8 – 107 A
• Rated speed: 1500 rpm
• Maximum speed: 3600 – 4500 rpm
• SynRM High-speed version: up to 8000 rpm

Detailed dimensions and images are available in the VEM eKat portal. You can also configure your own motor by adding the required options and accessories directly online.

Learn more and design your own motor: VEM eKAT »