Product Description:

The T511-012E59 is a brushless AC servo motor produced by Sanyo Denki as part of the T SANMOTION Servo Motors series. Intended for light-duty positioning tasks, the unit converts drive current into controlled shaft rotation for assembly robots, semiconductor handling stages, and miniature actuators. Its 51 mm outer diameter enables installation inside tight mechanical spaces while still accommodating a built-in incremental encoder for closed-loop feedback.

The motor provides a continuous stall torque of 0.42 N·m, which is the maximum steady load the shaft can hold without motion while maintaining thermal equilibrium. The armature is energized from a nominal bus of 80 V, allowing direct connection to many 24/48 V step-up servo amplifiers found in compact controllers. Under rated conditions, the motor delivers 110 W of mechanical power while spinning at 3000 rpm; this combination of speed and power makes it suitable for rapid indexing cycles. To limit copper loss, the three-phase stator has a phase resistance of 5.1 Ω, so current demand remains moderate even during acceleration.

For short bursts, the motor can withstand an instantaneous torque of 3.4 N·m, giving machines access to fast starts or quick direction changes without oversizing the drive. Position feedback is supplied by a three-channel line-driver encoder with a resolution of 2500 P/R, providing quadrature signals and an index pulse for accurate homing. Dynamic response is aided by the low rotor inertia of 0.037 × 10⁻³ kg·m² and a winding inductance of 3.2 mH, which support high control-loop bandwidth. The torque constant is 0.21 N·m/A, while the voltage constant is 21.8 × 10⁻³ V rpm⁻¹. These electrical values allow a compatible digital servo amplifier to regulate current and speed during rapid acceleration, deceleration, and positioning movements.