Slip ring motors

Slip ring motors belong to the family of asynchronous machines and are characterised by their special design, which distinguishes them from the widely used squirrel cage motors. Their rotor is connected to external resistors via slip rings and brushes, which allows the rotor current to be specifically influenced. This technology enables flexible adjustment of the motor behaviour, especially during start-up, and makes slip ring motors the preferred choice for applications with high mechanical requirements and the need for controlled torque characteristics.

Features

The key feature of slip ring motors is the ability to vary the rotor resistance during operation. This is achieved by means of slip rings and brushes that connect the rotor to external resistors. The advantage of this design is particularly evident during start-up: the motor can generate a high starting torque without requiring excessive starting current. This property makes it ideal for use under special conditions where a smooth and controlled start-up phase is essential, such as in conveyor systems. In addition, the adaptability of the rotor resistance enables a flexible response to different load requirements, thus contributing to increased efficiency in industrial processes.

Applications

Slip ring motors are used in a wide range of applications, especially those that place high demands on starting behaviour and torque. Typical areas of application are heavy machinery and equipment such as cranes, lifts, conveyor systems and mills, where the motors have to withstand high mechanical loads. Their ability to generate high starting torques with low starting currents also makes them suitable for applications that require precise control and smooth acceleration, such as pumps, fans or compressors. In addition, slip ring motors are used in industrial plants where flexible adaptation of the motor to different load conditions is necessary to achieve optimum performance.

 

Our range of services

Slip ring motors are still used in many industrial sectors. With their properties, they largely determine the effectiveness of production. With VEM three-phase motors with slip ring rotors, the advantages of this drive solution are combined with VEM's exceptional know-how in their production.

Due to their wide range of modifications, the motors can be optimally tailored to customer applications; they are particularly suitable for heavy starts, especially on unstable networks.

Technical details

Size

 132 – 315

Performance range

 2.2 – 315 kW

Operating mode

 Continuous operation, S1 as well as operating modes S2, S3 and S4/S5

Speeds

 1,500, 1,000, 750, 600, 500 min⁻¹

Protection types

 IP 54, IP55, optional IP 56, IP 65 according to EN 60034-5 (IEC 60034-5)

Designs

 IM B3, IM B35, IM B5 and derived designs according to EN 60034-7

Types of cooling

 according to EN 60034-6 (IEC 60034-6): self-ventilated, IC 411, forced-ventilated, IC 416, unventilated, IC 410

Coolant temperature/installation altitude

 standard -20 °C to +40 °C, installation altitude 1000 m above sea level, different temperatures and installation altitudes on request

Transponder

 optional, RFID system iID®2000 (13.56 MHz based on ISO 15693)
 

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Downloads

Productinformations

Drehstrom-Asynchronmotoren mit Schleifringläufer für Betriebsart S1 (Dauerbetrieb)

Three-phase asynchronous motors with slip ring rotor for operating mode S1 (continuous operation)

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EN

Drehstrom-Asynchronmotoren mit Schleifringläufer für Betriebsarten S3, S4/5 (Aussetzbetrieb)

Three-phase asynchronous motors with slip ring rotors for operating modes S3, S4/5 (intermittent operation)

DE
EN

Schleifringläufermotoren – Baureihen S..R/SPR und S..H/SPH

Slip ring motors – S..R/SPR and S..H/SPH series

DE
EN

EU declaration of conformity

EU-Konformitätserklärung für asynchrone Drehstrom-Motoren/-Generatoren mit Käfigläufer oder Schleifringläufer

EU declaration of conformity for asynchronous three-phase motors/generators with squirrel cage or slip ring rotors

Safety instructions

Sicherheitshinweise für elektrische Betriebsmittel in Niederspannungsstarkstromanlagen (2014/35/EU)

Safety instructions for electrical equipment in low-voltage power systems (2014/35/EU)

Assembly, operating and maintenance instructions

Zusätzliche Bedienungsanleitung Permanenterregte Synchronmotoren

Additional operating instructions permanent magnet synchronous motors

DE