8Lsa57.Eb022d004-1 B & R Automation
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The B & R Automation 8Lsa57.Eb022d004-1 is a synchronous motor in the 8LS Synchronous Motors series. It features a nominal power of 4147 watts, nominal torque of 18 Nm, and a rated speed of 2200 rpm. The motor supports a maximum axial force of 497 Newtons and has an encoder resolution of 19/12 bits with 4096 encoder revolutions.
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Product Description:
B&R Automation’s 8Lsa57.Eb022d004-1 is a three-phase permanent-magnet synchronous motor supplied under the 8LS Synchronous Motors series. The unit converts drive output into rotational motion for positioning axes, gantries, and transfer modules within automated machinery. With its 142 mm square flange and length code 7 housing, the motor integrates directly with standard mechanical frames while enabling closed-loop servo control through a 19/12-bit single-turn encoder that retains 4,096 multi-turn positions. This feedback arrangement provides absolute position data across multiple shaft revolutions, allowing the connected drive to maintain position awareness after a power cycle.
At the rated operating point, the shaft turns at 2200 rpm and delivers a nominal torque of 18 Nm, producing 4147 W of mechanical power while drawing 8.1 A from the inverter. When a short-term overload is required, the motor can reach a maximum torque of 69 Nm. The stator has an inductance of 13.17 mH, which moderates the rate of current rise during rapid command changes. The rotor inertia of 13.13 kg·cm² balances dynamic responsiveness with load stability, and the motor permits an axial bearing load of 497 N without reducing its expected service life. These operating values support controlled acceleration and deceleration when the motor is paired with a compatible servo drive.
The motor has a thermal time constant of 46 min, indicating how quickly its temperature approaches equilibrium during sustained operation. Its winding resistance is 1.13 Ω, while a voltage constant of 134.04 V/1000 rpm keeps the back electromotive force within typical 400 V bus levels. The torque constant of 2.22 Nm/A provides the drive with accurate current-to-torque scaling for closed-loop control. An electrical time constant of 11.7 ms supports a fast current-loop response when torque commands change. Proper drive configuration should account for these electrical and thermal values to keep current, voltage, and winding temperature within the motor’s operating limits.
