8MSA4S.R0-30 B & R Automation
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The 8MSA4S.R0-30 is a three-phase synchronous motor manufactured by B & R Automation as part of the 8MS Three Phase Synchronous Motors series. It features a self-cooling system, a BRX type resolver for encoder technology, and has a nominal rated speed of 3000 rpm. The motor has a smooth shaft end, motor size 4, and does not include a holding brake or oil seal.
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Product Description:
The 8MSA4S.R0-30 three-phase synchronous motor is manufactured by B&R Automation within the 8MS Three Phase Synchronous Motors series. As a compact drive element, it converts electrical power into controlled rotation for indexing tables, Cartesian gantries, and other automated axes used in manufacturing cells. Its brushless construction and integrated position sensor allow direct interface with B&R servo drives, supplying repeatable motion profiles that support precise throughput on assembly and packaging lines. Electronic commutation also helps the motor respond cleanly during frequent starts, stops, and direction changes. This arrangement suits machines that need compact motion hardware with integrated feedback.
All power, signal, and protective-ground conductors exit on the A-side, simplifying layouts that favor short cable runs and unified routing. Keeping every connection on one side also leaves the opposite end less crowded in tightly spaced assemblies. Heat is removed by a self-cooling housing, so no auxiliary fan is required around the motor body. Position feedback comes from a resolver of type BRX, which relays rotor-angle information to the controller during operation. Under rated conditions, the shaft reaches 3000 rpm, giving the axis a useful operating range for moderate inertia loads. The unit is supplied without a holding brake and without an oil seal, so any required load holding or additional environmental protection must be provided elsewhere in the machine.
The motor uses the short S length and a frame classified as Size 4, giving it a compact axial profile with the broader housing associated with this frame class. The short housing can help where installation space is limited along the axis direction. A smooth shaft end supports direct coupling to pulleys or rigid hubs that clamp onto the shaft surface. For position accuracy, resolver nonlinearity is limited to ±1 angular minute, while overall precision across its electrical cycle remains within ±10 angular minutes. These feedback limits help the drive maintain coordinated axis motion during interpolation and other synchronized movement tasks.
Frequently Asked Questions about 8MSA4S.R0-30:
Q: What is the rated speed of the 8MSA4S.R0-30 synchronous motor?
A: The 8MSA4S.R0-30 has a rated nominal speed of 3000 rpm, making it suitable for applications requiring standard motor speeds.
Q: What type of shaft end is featured on the 8MSA4S.R0-30 motor?
A: This model comes with a smooth shaft end, providing compatibility with specific coupling and drive system requirements.
Q: What encoder technology is used in the 8MSA4S.R0-30 motor?
A: The 8MSA4S.R0-30 uses a BRX-type resolver for encoder technology, offering position feedback for motor control.
Q: How is the 8MSA4S.R0-30 synchronous motor cooled?
A: The cooling system for this motor is self-cooling, so no additional external cooling is necessary.
Q: Does the 8MSA4S.R0-30 motor include a holding brake?
A: This model is not equipped with a holding brake, so external braking solutions may be required for certain applications.
