8MSA4M.R0-44
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The 8MSA4M.R0-44 is a synchronous motor developed by B & R Automation. A part of the 8MS Three Phase Synchronous Motors series, it features a hardened steel construction and a helical tooth design with a helix angle of 19° 31'. The motor's length measures 882 mm and its face width is 32 mm.
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Product Description:
B & R Automation creates high-performance parts for automation operations and one of their products is 8MSA4M.R0-44 8MS 3 phase Synchronous Motor. This motor supports efficient and accurate motor control and has a self-cooling feature that confirms effective thermal management during operation. It is built with a motor size code 4 and integrates a resolver-based encoder system.
The 8MSA4M.R0-44 Three Phase Synchronous Motor has a resolver that offers a precision of ±10 angular minutes with a non-linearity of ±1 angular minute. These specifications guarantee stable position feedback in demanding applications. The peak torque may reach up to 21.2 Nm, while the levelling torque is estimated at 5.3 Nm. Without a brake the maximum rotational acceleration is 80,000 rad/s². This makes it possible for high-speed systems to execute dynamically quickly. With a maximum speed of 12,000 rpm it provides quick and precise motor control. The motor has effective heat dissipation over time, as evidenced by its thermal time constant of 64 minutes. The 8MS 3-phase synchronous motor has a moment of inertia without the brake is 2.65 kgcm² and the motor's weight is 5.6 kg without the brake system. The resolver system works effectively with the motor’s control architecture to ensure reliability and precision. For applications requiring a brake system, the 8MSA4M.R0-44 includes a holding brake.
The 8MSA4M.R0-44 Three Phase Synchronous Motor brake adds a moment of inertia of 0.54 kgcm² and a weight of 0.46 kg. It provides a holding torque of 8 Nm for secure motor stoppage when required. The recommended cable cross-section is 1.5 mm² for stable electrical connectivity. The 8MS Three Phase Synchronous Motors are engineered to deliver dependable motion performance under industrial conditions.
Frequently Asked Questions about 8MSA4M.R0-44:
Q: Why is a resolver preferred in the 8MSA4M.R0-44 for long-term feedback stability?
A: The resolver system is less susceptible to signal degradation over time, providing consistent feedback across the motor's operational lifespan.
Q: How does the stall torque of 5.3 Nm benefit low-speed control?
A: The stall torque ensures the motor can hold or move loads at zero or near-zero speeds without slipping, essential for precise positioning.
Q: What advantage does the 5.6 kg weight without brake offer in system integration?
A: The lighter build makes it easier to mount and integrate into compact automation systems without compromising on torque or speed capacity.
Q: Why does the brake add an extra 0.54 kgcm² to the moment of inertia in the 8MSA4M.R0-44?
A: The brake’s added inertia slightly impacts system dynamics but is necessary to ensure secure holding torque of 8 Nm during power-off or fault conditions.
Q: How does the 1.5 mm² cable cross-section recommendation affect electrical performance in 8MSA4M.R0-44?
A: The recommended cable size minimizes voltage drop and ensures consistent current flow, which is essential for stable motor torque output and control.
