8LSA55.DB030S300-3 B & R Automation
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The 8LSA55.DB030S300-3 is a three-phase synchronous motor from the 8LS Synchronous Motors series by B & R Automation. It delivers a nominal power of 3644 W and a nominal torque of 11.6 Nm, with a maximum torque of 41.4 Nm. This motor features inductive EnDat encoder technology, an efficiency of 96.3 percent, and a self-cooling principle with flange mounting.
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Product Description:
The 8LSA55.DB030S300-3 belongs to the 8LS Synchronous Motors series produced by B & R Automation. It is intended for distributed automation axes that require direct machine mounting and compact cabling. Within this series, it carries the internal designation 8LSA and is supplied as product revision 3. A mounting flange with a 142 mm square outline and a 130 mm centering diameter allows direct attachment to gearboxes or machine frames, while a keyed shaft end transfers torque to the load. The motor uses a single-cable hybrid connection, so power, feedback, and brake conductors share one connector, which simplifies routing in cabinets and drag chains. Self-cooling through free air circulation eliminates the need for an external blower.
At a nominal current of 7.1 A, the motor delivers 3644 W of mechanical power and 11.6 Nm of torque at a rated speed of 3000 rpm. Four pole pairs and a voltage constant of 98.44 V/1000 rpm match the motor to standard inverter outputs, and an inductive EnDat encoder version 2.2 provides absolute feedback with 19/12-bit resolution and multi-turn tracking over 4096 revolutions. This feedback arrangement supports closed-loop positioning and speed control without requiring a separate sensor package. Rotor response is affected by an inertia of 8.19 kg cm². The stator has a phase inductance of 12.5 mH and a phase resistance of 1.127 Ω, while the keyed circular connector is mounted on the stator housing and length code 5 sets the overall body depth. No oil seal is fitted, so added protection is needed where fluid ingress is possible.
For short-term demand, the motor can reach 41.4 Nm of maximum shaft torque. During power-off, a standard holding brake with 15 Nm secures the shaft. The torque constant is 1.63 Nm/A, and efficiency reaches 96.3% under rated conditions. The brake is intended for holding, and the motor uses standard bearings rather than reinforced bearings. Axial loading should remain appropriate for the application.
Frequently Asked Questions about 8LSA55.DB030S300-3:
Q: What is the rated speed of the 8LSA55.DB030S300-3 motor?
A: The 8LSA55.DB030S300-3 features a rated speed of 3000 rpm for reliable operation in high-speed applications.
Q: What type of encoder is used in the 8LSA55.DB030S300-3 motor?
A: This motor is equipped with an inductive EnDat encoder, providing both single-turn and multi-turn resolution.
Q: How is the 8LSA55.DB030S300-3 motor cooled?
A: The 8LSA55.DB030S300-3 is designed with a self-cooling, free circulation system for efficient thermal management.
Q: What is the nominal torque output of the 8LSA55.DB030S300-3?
A: It offers a nominal torque of 11.6 Nm, supporting stable performance during continuous operation.
Q: Does the 8LSA55.DB030S300-3 motor come with a holding brake?
A: This model includes a standard holding brake with a holding torque of 15 Nm.
