8MSA4L.R0-31
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The 8MSA4L.R0-31, crafted by B & R Automation and part of the 8MS Three Phase Synchronous Motors series, features a sprocket size of 8 and 31 teeth. Made of standard steel, it includes a finished bore with keyway and an approximate outside diameter of 10.434 inches. The sprocket has a pitch of 1 inch.
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Product Description:
The 8MSA4L.R0-31 3-Phase Synchronous Motor produces a 2.01 kW rated power output to make it capable of efficiently driving loads with a constant energy supply. This motor is manufactured by B & R Automation, and it operates reliably with a stalled current of 4.82 A, which indicates its ability to start loaded without initiating overcurrent faults.
The 8MSA4L.R0-31 motor generates a 6.4 Nm rated torque, which is capable of providing stable torque for continuous operating conditions, qualifying it for use in operations involving controlled force. The stator impedance of this motor is 3 ohms to ensure efficient control of current and assist in minimizing energy loss during operation. With a 19.2 millihenry stator inductance, this synchronous motor maintains stable electrical operation by limiting current variation during sudden load changes. This motor’s 94V per 1000 min⁻¹ voltage constant allows precise speed control in synchronized drive applications. The maximum current rating of 29.4 A ensures that this motor is able to endure momentary overloads or acceleration requests without degradation of performance or stressing components. The electrical time constant of this synchronous motor is 6.4 milliseconds, which enables rapid response to changes in command, essential in high-speed servo applications.
In addition, this motor’s thermal time constant of 66 minutes supports long duty cycles prior to thermal limits. Mechanically, this motor weighs 7.7 kg without a brake, which makes it easy to install in different systems. The moment of inertia of the 8MSA4L.R0-31 motor without the brake is 4.15 kgcm² to provide quick acceleration and deceleration with stability. This motor’s optional brake provides an additional moment of inertia of 0.54 kgcm² and an additional mass of 0.46 kg. This brake also offers an 8 Nm holding torque for safe shaft locking during power-off conditions.
Frequently Asked Questions about 8MSA4L.R0-31:
Q: Why is the 3-ohm stator resistance important in the 8MSA4L.R0-31 motor?
A: It limits current flow, enhancing energy efficiency. It also reduces internal heating during prolonged use.
Q: How does the 94 V/1000 min⁻¹ voltage constant impact motor control?
A: It enables precise speed regulation in synchronized systems. This allows for smoother control in servo-driven automation environments.
Q: What is the role of the 66-minute thermal time constant in system stability?
A: It ensures the motor can operate for longer durations before reaching thermal limits. This extends operational life under continuous duty cycles.
Q: Why is a 0.54 kgcm² moment of inertia added by the brake?
A: It provides smoother deceleration and increased rotor stability. This helps maintain position accuracy when braking is engaged.
Q: How does a 4.82 A stalled current improve startup behavior?
A: It allows the motor to start under load without tripping overload protections. This is especially useful in high-inertia load conditions.
