Synchronous Reluctance Motors

VR Series

KEB Automation’s broad motor portfolio is enhanced by synchronous reluctance motors. Although there are many parallels with asynchronous motors in terms of design and the production process, there is a significant difference in the rotor. The fundamentally simple mechanical design of the motors and the resulting lower maintenance requirements, along with their robustness, are characteristics of synchronous reluctance motors that save time and money in practice. In addition, the motors operate entirely without rare earth elements –ensuring maximum material independence in times of strained supply chains.

These motors are used in extruder applications, packaging systems, wire and sheet metal processing, and woodworking machines. Speed-controlled pumps, paper and cardboard production lines, machine tools, and recycling plants are further areas of application.

Highlights

Rotor without permanent magnets: independent of rare earths
No fundamental rotor losses (I2R), no rotor slip
High efficiency with an attractive price-to-performance ratio
Easy maintenance compared to permanent magnet motors; no special tools required for rotor replacement
Optimized performance during field weakening

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Technical Data

There are six rated speeds.

n_n 580 rpm	n_n 1000 rpm	n_n 1500 rpm	n_n 1800 rpm	n_n 2200 rpm	n_n 2600 rpm
Un 360 Vac	Un 360 Vac	Un 360 Vac	Un 360 Vac	Un 360 Vac	Un 360 Vac

IP 54 - IC416

Rated speed 1500 rpm	Power range [kW]	Torque [Nm]
VR 160	30,0 – 55,0	191,0 – 350,0
VR 180	30,0 – 55,0	350,0 – 700,0
VR 225	110,0 – 180,0	700,0 – 1146,0
VR 280	225,0 – 355,0	1433,0 – 2260,0

IP 23 - IC416

Rated speed 1500 rpm	Power range [kW]	Torque [Nm]
VR 160	37,5 – 63,3	239,0 – 403,0
VR 180	66,0 – 121,0	420,0 – 770,0
VR 225	127,0 – 216,0	805,0 – 1375,0
VR 280	270,0 – 426,0	1720,0 – 2712,0

Water cooling

Rated speed 1500 rpm	Power range [kW]	Torque [Nm]
VR 160	40,7 – 66,0	260,0 – 420,0
VR 180	75,0 – 110,0	478,0 – 700,0
VR 225	145,0 – 180,0	923,0 – 1146,0
VR 280	225,0 – 355,0	1433,0 – 2260,0

Options

Liquid cooling

Additional motor cooling option
Improved performance compared to naturally ventilated motors
For machines and systems equipped with liquid cooling

Incremental encoder

Mounted on the rear of the motor, the incremental encoder ensures precise measurement of speed and position. Measurement takes place directly on the motor shaft, ensuring high control quality. It also enables compact, space-saving integration within the motor and often eliminates the need for additional external encoders or sensors. Incremental encoders are a cost-effective solution for many standard servo and drive applications.

Resolver

Resolvers are characterized by high resistance to shocks, vibration, and temperature. They are also insensitive to contamination, moisture, and EMC interference. High operational reliability even in harsh industrial environments and a long service life due to their simple and robust design make the resolver an attractive option. They are particularly suitable for applications with high demands on reliability and availability.

COMBISTOP S1

The new S1 high-performance holding brake features an innovative, patented friction system. This provides a significantly higher braking torque compared to conventional spring-loaded brakes. It is particularly well-suited for servo applications with increased safety requirements. Thanks to the plug-and-play system, this series is also easy to install. The torque range of the high-performance holding brake is 0.5 Nm to 60 Nm.

Shaft without keyway

Backlash-free torque transmission with modern clamping or shrink-fit connections.
No weakening of the shaft due to a keyway.
Simpler balancing at higher speeds.
Reduced installation and maintenance effort with suitable coupling systems.