Product Description

The servo motor SF-A4.0125.030-00.000 from the SF series has a brushless design. It is manufactured by Rexroth Indramat. The winding current is controlled by its stationary part, which has sinusoidally distributed winding, which produces the back EMF (electromotive force) in the waveform. SF servo motors are classified into two types: three-phase and single-phase. The mechanical energy that is produced by the motor is up to 90 % of the total input electrical power. The design of this motor minimizes friction and overheating risks by utilizing a large number of fixed or barely moving parts.

The sinusoidal EMF is produced through the induced electromagnets. The motor has a frame size of 2 and is designed according to the suffix A. It follows the principle of locked rotor torque (14.5 Nm). This parameter is crucial because it shows the starting characteristics of the motor and its capacity to handle the initial induced current. The rotor shaft rotates around 3000 times per minute (rated speed). The motor's maximum mechanical output is generated at this speed. In driven systems, a keyway increases torque capacity and keeps parts from falling on a shaft.

Torque is transferred from the shaft to the power-induced component via feather keys. The length (L) and mass (m) of the motor without any holding brake are 277 mm and 16 kg, respectively. The SF motor is resistant to mechanical shocks, which ensures its integrity and prevents any permanent damage. The thermistors monitor and balance the temperature to ensure thermal motor protection. If an application requires high torque density and maximum efficiency control, then this brushless motor is the best option.