S line

Synchronous motors are applied on applications that require power factor correction, low starting currents and high torques, and constant speed under load variations with low operating and maintenance costs.

Synchronous motors are manufactured specially to meet the needs of each application. Due to their construction features, operation with high performance and adaptability to all type of environments, they are virtually used in all industry sectors, such as: Mining, Steel, Pulp & Paper, Sanitation, Oil & Gas, Cement, Rubber and other.

Output

:

up to 150.000 kW

Speeds

:

3.600 up to 150 rpm

Frame

:

132 up to 450

Voltage

:

up to 13.800 V

Frequency

:

50 or 60 Hz

Enclosure

:

IC01 (IP23 to IP24), IC611 (IP54 to IP65), IC81W (IP54 to IP65)

Insulation Class

:

F

Temperature Rise

:

B (80K)

Ambient Temperature

:

-20˚ C to +40˚ C at 1000m.a.s.l.

Frame Material

:

Cast iron or Welded steel

Thermal Protection

:

RTD PT100 two per phase and one per bearing

Construction

:

Horizontal / Vertical

Standard

:

IEC / NEMA

Manufacturing Site

:

WEG Motors (Brazil)

Types of Excitation:

Synchronous motors require a source of direct current in order to supply the necessary power to the fields winding (rotor winding), which is usually provided by a rotating brushless exciter or by slip rings and brushes (static exciter).

Static exciter (with brushes):

Synchronous motors with static exciter are designed with slip rings and brushes that allow the current supply to reach the rotor poles by means of sliding contact.

The direct current must come from an AC/DC static controller and converter located outside the motor.

Synchronous motors with static exciter are more often used in application with variable speed with a frequency drive operation or in applications where the system dynamic response must be extremely fast.

Brushless Exciter:

Synchronous motors with brushless excitation system present a rotating exciter, normally located in a compartment in the back of the motor. Depending on the motor operation, the exciter is composed by:

Exciter with direct current supply on the stator

Exciter with alternating current supply on the stator

The exciter rotor supplies the necessary power to the motor excitation winding through a rotating, three-phase rectifier brigde.