Product Description:

The T840T-092E5A is an AC servo motor produced by Sanyo Denki within the T SANMOTION Servo Motors series. It converts regulated electrical power into tightly controlled rotary motion, allowing machine tools, pick-and-place heads, or indexing tables to position loads with repeatable accuracy in automated production lines. The motor’s electromagnetic design supports feedback-based speed and torque regulation, providing a compact drive element for medium-power axes.

The motor has a rated output of 400 W at a rated speed of 2500 rpm. To produce this output, the windings operate at 85 V while drawing a rated armature current of 5.8 A, resulting in a steady torque of 1.57 N·m. A continuous stall torque of 1.70 N·m is available when the shaft is locked while the motor remains energized, and the stall armature current rises slightly to 6.0 A under this condition. Electromechanical conversion efficiency is related to the torque constant of 0.314 N·m/A, which means that approximately one-third of a newton-meter is produced for every ampere supplied. The back-EMF profile has a voltage constant of 32.9 × 10⁻³ V per rpm. The integrated tachometer generator produces 7 × 10⁻³ V per rpm with a tolerance of ±10%, allowing the drive to monitor the actual motor speed without an external sensor.

Short-term demands can be met with a maximum instantaneous torque of 12.0 N·m and a corresponding surge current of 40 A. Electrical response is influenced by an armature inductance of 1.9 mH and an armature resistance of 0.95 Ω; together, these values determine the current rise time and copper losses during acceleration. A maximum mechanical speed of 4000 rpm expands the usable control range, while the 87.5 mm outer diameter fits within common motor mountings.