Why the 8LSC45.ee030ffgg-4 Delivers Lower Cost per Axis
In modern automation, every axis must balance performance with operating expenses. The B&R 8LSC45.ee030ffgg-4 three-phase synchronous servo motor addresses this by combining high torque density with a compact, lightweight design. This motor helps engineers reduce machine footprint and energy consumption, directly lowering total cost of ownership.
With a nominal speed of 3000 rpm and a maximum speed of 6600 rpm, the 8LSC45.ee030ffgg-4 supports fast cycle times. Its nominal torque of 8.8 Nm and stall torque of 10.4 Nm provide ample margin for intermittent loads. This means you can often select a smaller motor than otherwise needed, saving both capital and installation costs.
Technical Specifications That Cut Costs
The motor's nominal power of 2777 W and nominal current of 5.4 A indicate efficient energy conversion. A higher torque constant (1.63 Nm/A) means more torque per ampere, reducing electrical losses and cooling requirements. Over the motor's lifetime, this efficiency translates into measurable energy savings.
Stall current is 6.4 A, while maximum current reaches 29.2 A for short-duration peak loads. The stator resistance of 2.78 Ohm and inductance of 21.8 mH define the electrical behavior, ensuring stable control with the recommended ACOPOS servo drive (8X8X). The electrical time constant of 7.8 ms and thermal time constant of 26 minutes help predict thermal behavior, allowing optimized duty cycles that prevent overheating and extend insulation life.
With a moment of inertia of 3.2 kg·cm² and a mass of 7.74 kg (without brake), this motor offers a favorable inertia-to-torque ratio. Lower inertia means faster acceleration and deceleration, reducing cycle time and increasing throughput. The optional brake provides a holding torque of 8 Nm, adding safety during power loss without adding excessive weight (brake mass 1.000 kg, inertia 0.69 kg·cm²).
Application Scenarios: Where the 8LSC45.ee030ffgg-4 Saves Money
In packaging machinery, the 8LSC45.ee030ffgg-4 excels at high-speed indexing and registration. Its high overload capacity (maximum torque 30.4 Nm) handles sudden load spikes without oversizing. This reduces the need for larger, more expensive motors and drives.
For material handling and robotics, the compact size and reduced weight simplify mechanical integration. The single-cable (hybrid) solution option reduces cabling costs and installation time. Additionally, the encoder options for functional safety (resolver or EnDat) can eliminate the need for separate safety components, further lowering system cost.
In a typical CNC machine tool axis, the motor's dynamic response and positioning precision minimize non-cutting time. The optimized torque rippling ensures smooth motion, reducing wear on mechanical components and extending maintenance intervals. These factors contribute to lower lifecycle costs.
Compatibility and Integration
The 8LSC45.ee030ffgg-4 is designed to work with B&R ACOPOS servo drives, specifically the 8X8X series. This pairing ensures optimal performance and simplifies commissioning. The motor features a connector size/type of 1 and a cable cross-section of 0.75 mm², which are standard for this power class.
Feedback options include resolver (R0/R2) or EnDat (inductive/optical, including safety-related variants). The 32-line single-/multi-turn encoder provides high resolution for precise positioning. Built-in plug-in connectors reduce wiring errors and speed up installation, saving labor costs.
Cost Analysis: Energy and Maintenance Savings
The motor's efficiency directly impacts energy bills. With a nominal current of 5.4 A, the 8LSC45.ee030ffgg-4 draws less power than comparable motors with lower torque constants. Over 8,000 operating hours per year, even a 2% efficiency gain can save hundreds of dollars per axis.
Maintenance costs are also reduced. The externally fan-cooled design (IC4A0A6) uses a 24 VDC fan (IP68/IP65) that is easily replaceable. The motor's IP64 protection (IP65 with optional oil seal) minimizes contamination-related failures. Bearing life is calculated per DIN ISO 281, and the optional reinforced A-side bearing (sizes 4-8) increases allowable radial/axial forces, extending bearing life in high-load applications.
Thermal protection via KTY83-110 / AM-PTC1000 sensors prevents overheating, avoiding costly winding failures. The maximum winding temperature of 155 °C (with derating via ACOPOS) ensures safe operation. All these features reduce unplanned downtime, which is often the largest hidden cost in production.
Frequently Asked Questions
What is the nominal torque of the 8LSC45.ee030ffgg-4 and how does it affect cost?
The nominal torque is 8.8 Nm, with a stall torque of 10.4 Nm. This high torque density allows you to select a smaller motor for a given application, reducing initial purchase cost and installation footprint. The maximum torque of 30.4 Nm provides overload capability, preventing the need for a larger motor to handle peak loads.
How does the single-cable (hybrid) solution reduce installation costs?
The single-cable solution combines power and feedback in one cable, reducing material costs and installation time. It also simplifies cable management and reduces the risk of wiring errors. This option is available with the 8LSC45.ee030ffgg-4, making it a cost-effective choice for new machines or retrofits.
What safety features does the 8LSC45.ee030ffgg-4 offer, and do they add cost?
The motor supports encoders for functional safety (e.g., EnDat with safety-related variants). However, STO (Safe Torque Off) is implemented by the ACOPOS servo drive, not the motor itself. This means you can achieve functional safety without paying for motor-integrated safety hardware, keeping costs lower. Always verify the specific safety rating with your drive configuration.
How does the motor's thermal performance impact operating costs?
The thermal time constant of 26 minutes and the thermal protection sensors (KTY83-110 / AM-PTC1000) allow the drive to monitor winding temperature and adjust operation accordingly. This prevents overheating, which can cause insulation failure and costly repairs. The maximum winding temperature of 155 °C (with derating via ACOPOS) ensures a long service life, reducing replacement costs.
Why Choose AutoDCSTech for Your B&R Spare Parts
AutoDCSTech specializes in industrial automation spare parts, offering genuine B&R components like the 8LSC45.ee030ffgg-4. Our team understands the importance of minimizing downtime, so we provide fast sourcing and reliable availability. Contact us to check current lifecycle status and pricing for this motor.
We also offer technical support to help you select the right motor and drive combination. With our competitive pricing and global shipping, we help you keep your production lines running efficiently. Reach out today for a quote.
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