Product Description:

The SR-A3.0093.060-14.823 is a synchronous servo motor produced by Bosch Rexroth Indramat within the SR Synchronous Servo Motors series. It converts electrical energy from a drive into tightly controlled mechanical rotation for positioning axes in automated machinery and assembly equipment. Resolver feedback built into the unit supplies incremental and absolute position data to the controller, letting closed-loop systems command high speeds without losing accuracy.

At a rated speed of 6000 rpm, the rotor can sustain high cycle frequencies while the stator produces torque in direct proportion to its current. The motor’s torque constant is 0.67 Nm/A, so each ampere commands approximately two-thirds of a newton-meter. During standstill starts, the drive may draw 13.5 A rms, generating a locked-rotor torque of 9.1 Nm that overcomes static loads. Dynamic behavior is influenced by a rotor inertia of 16 × 10⁻⁴ kg·m², balancing rapid acceleration with stable servo regulation. An integrated resolver encoder supplies 8192 increments per revolution with a mechanical accuracy of ±10 arcminutes, giving the controller fine position granularity. When commanded into plug braking, a 3.3 Ω dissipation path moderates current peaks, protecting both the windings and the connected drive electronics.

The holding brake provides 10.0 Nm of static torque to secure vertical or suspended axes when power is off. It is energized from a 24 VDC supply that may vary by ±10%, drawing 0.66 A to disengage. Brake release takes 29 ms, and lock engagement finishes in 20 ms, so axial drift is limited during routine stops. The plug-braking system absorbs regenerative energy, and the coil and external resistor can dissipate 785 Ws through the resistance path. This dissipation helps prevent drive overvoltage when the motor decelerates abruptly.