{"id":6423,"date":"2024-12-18T16:27:05","date_gmt":"2024-12-18T15:27:05","guid":{"rendered":"https:\/\/www.cmesrl.com\/motori-a-scorrimento\/"},"modified":"2025-06-23T16:42:18","modified_gmt":"2025-06-23T14:42:18","slug":"variable-torque-motors","status":"publish","type":"page","link":"https:\/\/www.cmesrl.com\/en\/variable-torque-motors\/","title":{"rendered":"Variable torque motors"},"content":{"rendered":"\t\t
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Variable torque motors<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Description<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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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.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Characteristics:<\/h2>

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.<\/p>

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).<\/p>

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.<\/p>

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.<\/p>

Transmission Determination and Motor Selection<\/strong><\/p>

The torques indicated in the tables are intended for continuous service in a working environment with ambient temperatures not exceeding 40\u00b0C. Particular attention should be paid to the possible coupling of the motor to transmission components such as reducers or other parts.<\/p>

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\u00b0C.<\/p>

Variants<\/strong><\/p>

It is possible to manufacture the SC-SCN Va-V series slip-ring motors in all construction forms provided for by national standards.<\/p>

It is also possible to manufacture slip-ring motors with different polarities: 4, 6, 8 poles.<\/p>

They can be produced with the following variants:<\/p>

– 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.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Technical specifications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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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.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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4\/6\/8 poles Self-ventilated Motors<\/div>\n\t\t\t\t\t\t\t\t\t
4\/6\/8 Poles, Servo-ventilated Motors<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t
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4\/6\/8 poles Self-ventilated Motors<\/div>\n\t\t\t\t\t