Variable torque motors are motors identified as SC-SNC Va-V, and made with different technical features compared to standard models. Scroll motors make it possible to provide an almost constant power within a predetermined range of variation speed.
They are composed of high resistance short-circuited rotors and appropriately designed windings.
 

Characteristics:
The SCN-Va-VC series motors provide torques that, starting from a maximum value at startup, decrease linearly with increasing speed, down to the minimum torque and synchronous speed.

The SC series motors are designed to operate in the speed range between 200-1200 rpm for the 4-pole version and 130-800 rpm for the 6-pole version (100-650 rpm for the 8-pole version).

The SCN series motors, on the other hand, are designed to operate in the speed range between 0 and 1200 rpm for the 4-pole version, 0-800 rpm for the 6-pole version, and 0-650 rpm for the 8-pole version.

In the case of SCN motors operating at speeds other than “ZERO” (locked rotor), the reported torques can be increased by following the instructions in the diagrams.

Transmission Determination and Motor Selection 

The torques indicated in the tables are intended for continuous service in a working environment with ambient temperatures not exceeding 40°C. Particular attention should be paid to the possible coupling of the motor to transmission components such as reducers or other parts.

It is recommended to carry out these couplings using an elastic joint; where this is not possible, it should be considered that the motor shaft temperature can, in some cases, reach a temperature of 90°C.

Variants
It is possible to manufacture the SC-SCN Va-V series slip-ring motors in all construction forms provided for by national standards.
It is also possible to manufacture slip-ring motors with different polarities: 4, 6, 8 poles.
They can be produced with the following variants:

• thermal probes for integral winding protection;
• tachometer dynamo;
• encoder placed on the rear;
• electromagnetic brakes with static torques greater than that of the motor, with AC or DC power supply through electronic power supplies.

Technical specifications
Slip ring motors are widely used in the field of cable winding machines, winding of metal wires, yarns, adhesive tapes, etc.
They can also be used as a “counterforce” (brake) and in all those applications where it is necessary to guarantee and maintain a constant wire/product tension as the speed varies.

The C and Cf series torque motors are designed to deliver virtually constant torque over varying rotational and counter-rotational speeds. The mechanical construction utilizes standardized MEC components.

The resulting mechanical action is comparable to a constant force spring with unlimited stroke, allowing for coupling with gearboxes or other components without requiring adjustments.”
 

Torque characteristics

The torque motor provides a torque that is virtually constant or similar to the starting torque within 60% of the synchronous and counter-rotational speed.

Usage Cases 
Torque motors are used in applications where constant and unlimited torque is required. A classic case is the drive of cable winding drums. These devices must be able to wind or unwind the cable, maintaining a tension on it that is as constant as possible. Another very frequent use is the control of roller conveyors with the possibility of counter-rotation or frequent operation at 0 rpm. In summary, it can be said that the torque motor is applicable wherever it is necessary to have a force in a constant potential state over time.
 

Electrical and Mechanical Characteristics

Polarity
The C and CF series torque motors are made with 6/8/12 poles.

Insulation
Given the particular construction and the thermal stresses to which the motors are subjected, the insulation is of class “F or H” with high-quality materials.

Winding Protection
Upon request, the winding is protected by thermal protectors embedded in the windings and calibrated according to the insulation class. Ventilation
The motors of the N/C series are self-ventilated, while those of the N/Va series are servo-ventilated. The high-efficiency helical fans up to size N 112 are single-phase V230 Hz 50/60, while the N132 sizes are cooled by high-efficiency centrifugal fans, with single-phase V230 Hz 50/60 or three-phase V230/400 Hz 50 power supply. In the case of single-phase power supply, the fans are thermally protected, while for three-phase, protection is provided at the customer’s request.

Voltage and Frequency
The standard motors are designed for V400 Hz 50 voltage, however, they can be made with special voltages upon customer request.

Version with Electromagnetic Brake CF
The torque motors identified by the code CF are equipped with a spring-loaded electromagnetic safety brake with braking action in the event of voltage failure.

We produce transducers of different types suitable for the most diverse applications: Transducer 80/15/B01 AC-AC, Transducer 80/15/B01C AC-DC, Transducer 80/EA/02 DC, Transducer 80/EA/021 DC.
 

Technical specifications

CME high efficiency motors, also called “high performance motors” comply with the efficiency levels established by the new IEC 60034-30 regulation. They are made in appropriately selected materials in order to minimize energy waste and thus increasing the overall efficiency of the motor. 

 They are developed in accordance with energy saving guidelines, so they combine the flexibility of three-phase motors with the use of selected materials in order to reduce energy waste and thus reaching high performances.
 

Main features:

Available in the versions with 2, 4 and 6 poles for continuous duty S1
 

Focus on high efficiency : 

Since 16th June 2011, in compliance with the IEC 60034-30 regulation, in Europe motors must have a minimum efficiency level corresponding to IE2. The class IE3 (electric motors with an absorption power 7.5 – 375 kW) is compulsory since 1st January 2015. 
Electric motors IE2 are allowed only if equipped with a VSD (inverter), with exception for the smallest motors. For these the regulation will be in force starting from the 1st January 2017. 

The regulation IEC 60034-30 is valid for three-phase asynchronous motors with cage rotor and single-speed between 50 and 60 Hz that: 

• have a rated power between 0.75 and 375 kW
• have a nominal voltage up to 1000 V
• have 2, 4 or 6 poles
• operate in-line
• hey are categorized depending on their functions according to IEC 60034-1, part 6.

Included in the regulation are:

• motors with flange, feet and/or shaft those mechanical dimensions don’t comply with IEC 60072-1

EXCLUDED from the regulation are:

• with 8 poles
• developed only to be used with inverters, in compliance with the IEC 60034-25 regulation, completely integrated in other machines, and that can’t be tested separated from the machine
• Brake motors
• Single-phase
• DDouble polarity

Typical applications:

High efficiency motors can be used in many applications, for example:

• renewable energy,
• textile machinery, packaging and labelling machinery,
• machine tools,
• woodworking machinery,
• machinery for the food industry,
• conveyor belts,
• pumps,
• fans,
• refrigeration and air conditioning
• compressors. 

CME high efficiency motors, also called “high performance motors” comply with the efficiency levels established by the new IEC 60034-30 regulation. They are made in appropriately selected materials in order to minimize energy waste and thus increasing the overall efficiency of the motor. 

They are developed in accordance with energy saving guidelines, so they combine the flexibility of three-phase motors with the use of selected materials in order to reduce energy waste and thus reaching high performances.

Main features:

Available in the versions with 2, 4 and 6 poles for continuous duty S1

Focus on high efficiency  

Since 16th June 2011, in compliance with the IEC 60034-30 regulation, in Europe motors must have a minimum efficiency level corresponding to IE2. The class IE3 (electric motors with an absorption power 7.5 – 375 kW) is compulsory since 1st January 2015. 
Electric motors IE2 are allowed only if equipped with a VSD (inverter), with exception for the smallest motors. For these the regulation will be in force starting from the 1st January 2017. 

The regulation IEC 60034-30 is valid for three-phase asynchronous motors with cage rotor and single-speed between 50 and 60 Hz that: 

• have a rated power between 0.75 and 375 kW
• have a nominal voltage up to 1000 V
• have 2, 4 or 6 poles
• operate in-line
• hey are categorized depending on their functions according to IEC 60034-1, part 6.

Included in the regulation are:

• motors with flange, feet and/or shaft those mechanical dimensions don’t comply with IEC 60072-1

EXCLUDED from the regulation are:

• with 8 poles
• developed only to be used with inverters, in compliance with the IEC 60034-25 regulation, completely integrated in other machines, and that can’t be tested separated from the machine.
• Brake motors
• Single-phase
• Double polarity

Typical applications:

High efficiency motors can be used in many applications, for example:

• renewable energy,
• textile machinery, packaging and labelling machinery,
• machine tools,
• woodworking machinery,
• machinery for the food industry,
• conveyor belts,
• pumps,
• fans,
• refrigeration and air conditioning
• compressors. 

These motors are designed and realized for the industrial sector, they are solid, reliable and can be used for different applications.

CME three-phase motors are standardized, self-ventilated asynchronous motors for general applications, in conformity with CENELEC European standards and with IEC international standards.

Widely used in many industrial applications, they guarantee reliability and high performances. They are motors for a wide range of applications, as they are very adaptable to customers’ needs.

Three-phase asynchronous motors need low maintenance operations, they are very flexible, and can be used in both production and service applications

Main features:

Quality is always our priority: 
the three-phase motors are set up in a well-equipped test room to guarantee high product quality.
Standard products are made using class “F” or higher insulating materials. The protection is IP 54 and power supply is 230/400 V 50 Hz. 

Typical applications

• Food industry
• Metallurgical industry
• Paper industry
• water treatment ant extraction plants
• Pumps and compressors.
• Elevators or good lifts
• Conveyor belts
• Ventilation and air-conditioning systems