8LSA43.R0030D100-0 by B & R Automation

The 8LSA43.R0030D100-0 is a synchronous servo unit manufactured by B & R Automation for the 8LS Synchronous Motors series. This model follows a standard configuration that omits a reinforced bearing, is supplied in length code 3, attaches with a mounting flange, and uses a single connector for power and feedback. The housing is supplied without an oil seal, so the shaft area needs external protection when the motor is installed in oil-rich environments. In industrial automation, the motor is used on axes that require precise velocity and position control during repeated motion cycles.

The motor has a rated speed of 3000 rpm, which supports direct coupling to machine elements that operate at this synchronous speed. Its electromagnetic layout uses a three-phase synchronous topology, so torque is produced without slip and commutation is handled by the controller. Heat is managed by self-cooling with free circulation, which removes the need for an external fan under normal ambient conditions. Rotor position feedback is provided by a resolver, which supplies analog sine-cosine signals for closed-loop regulation. The mechanical interface uses a 100 mm square flange, allowing the frame to align with common gearbox and mounting patterns.

Positional repeatability is supported by a 10 arcmin backlash window between the sensor and shaft, helping keep indexing error within normal servo limits. Cabling exits through an angled swivel header, which makes it easier to route the harness around nearby machine structures after installation. Torque is transferred through a keyed shaft, and the drive end is supplied with a key to reduce the chance of slip during startup or load changes. The motor is supplied without a holding brake, so static load retention must be handled by an external locking device or by maintained drive current where the application permits it.