B&R ACOPOSinverter 8I76T400055.00-000 High-Precision Power Stage Module for Dynamic Motion Applications

Comprehensive Technical Profile: B&R ACOPOSinverter Base Device 8I76T400055.00-000

The B&R 8I76T400055.00-000 is a high-precision power stage module designed as the foundation for the ACOPOSinverter P74 (multi-axis) and P76 (single-axis) servo drive systems. Operating within the 0.55 kW power segment, this base device delivers robust performance for dynamic motion applications requiring exceptional control accuracy and energy efficiency. As a critical component in B&R’s integrated automation ecosystem, it combines industrial-grade power electronics with intelligent features to streamline system design and enhance reliability.

Core Architecture and Functionality

Unlike standalone drives, the 8I76T400055.00-000 serves exclusively as the power conversion unit, housing the IGBT inverter bridge, protection circuits, and critical interfaces. It requires pairing with a separate ACOPOSinverter Control Module (e.g., 8AC120.60-1 for P76) that provides the motion intelligence, safety logic, and communication protocols. This modular approach allows engineers to scale control capabilities (via P74/P76 modules) while standardizing the power infrastructure—reducing complexity and lifecycle costs.

Key Technical Specifications and Innovations

1. Electrical Performance

   • Input Voltage: 3 × 380–500 V AC (±10%), compatible with global industrial grids (400 V/480 V nominal).

   • Output Power: 0.55 kW (550 W) continuous, supporting higher-torque applications than its 0.37 kW counterpart, with transient overloads up to 200% motor torque for peak dynamic demands.

   • Output Frequency: 0.1–599 Hz, enabling precise speed control for both asynchronous and synchronous motors.

2. Integrated Features

   • Class A EMC Filter: Embedded electromagnetic compatibility (EMC) filtering ensures compliance with EN 61800-3, suppressing conducted emissions without external components. This minimizes cabinet footprint and simplifies CE/UL certification.

   • Brake Chopper: Directly manages regenerative energy during deceleration or overhauling loads. When coupled with an external braking resistor, it prevents DC bus overvoltage, enhancing system safety and uptime.

   • Shield Plate (Included): Provides a low-impedance grounding point for motor/encoder cable shields, critical for noise immunity in sensitive servo applications.

3. Control & Safety Integration

   • Motor Control Modes: Supports sensorless vector control (for synchronous motors) and V/f curves (for asynchronous motors), including energy-optimized profiles for pumps/fans.

   • Safety Functions: While base hardware includes basic protections (overvoltage, overcurrent), comprehensive safety (e.g., STO, SS1, SLS) is implemented via the P74/P76 control module and configured in Automation Studio.

4. Connectivity and System Integration

   • DC Link Terminals: Enables Common DC Bus architectures, allowing regenerative energy sharing across multiple drives to cut energy costs by ≤20%.

   • Motor Terminals: U/V/W/PE screw terminals for secure motor connections.

   • Communication: All fieldbus interfaces (Ethernet POWERLINK, CANopen, OPC UA) are managed by the attached control module, ensuring real-time motion synchronization.

Detailed Technical Specifications Table

Hardware Integration and Application Design

Mechanical Implementation:
The base device’s conduction-cooled chassis must be mounted to a heatsink (e.g., cabinet backplate) using thermal paste for optimal heat dissipation. The included shield plate attaches adjacent to motor terminals, centralizing shield grounding. Motor/power wiring uses robust screw terminals, while the top-mounted slot accepts the P74/P76 control module—creating a unified drive unit ≤ 120 mm wide.

Energy Management:
The integrated brake chopper dynamically routes excess energy to an external resistor during deceleration. For multi-drive systems, the DC link terminals facilitate regenerative energy sharing—e.g., braking energy from a descending elevator axis can power a conveyor motor, reducing net energy consumption.

Software Configuration in Automation Studio

Engineers leverage B&R’s Automation Studio for end-to-end setup:

1. Hardware Mapping: The control module (P74/P76) auto-detects the base device, loading default parameters.

2. Motor Tuning: Motor-specific data (e.g., inertia, poles, thermal limits) is input for auto-commissioning; advanced users adjust PID gains for responsiveness/stability trade-offs.

3. Safety Logic: STO/SS1 triggers are configured via drag-and-drop function blocks.

4. Diagnostics: Real-time monitoring of DC link voltage, IGBT temperature, and torque utilization enables predictive maintenance.

Target Applications and Competitive Advantages

Use Cases:

• Packaging Machinery: Drives rotary fillers or labelers requiring 0.55 kW servos with <10 ms settling times.

• Material Handling: Precise control for mid-sized conveyors or palletizers.

• Pump/Fan Control: Energy-optimized V/f curves reduce power consumption by ≤40% in HVAC systems.

• Robotics: Joint actuation in 6-axis robots where compactness and torque density are critical.

Value Proposition vs. Alternatives:

• Space Efficiency: Integrated EMC/braking reduces cabinet footprint by ≥30% vs. modular designs.

• Performance: 200% transient torque enables faster acceleration/deceleration in cyclic processes.

• EMC Resilience: Class A filtering + shield plate mitigates signal interference in crowded cabinets.

• Ecosystem Synergy: Seamless integration with B&R PLCs, HMIs, and I/O via POWERLINK reduces development effort.

Conclusion

The 8I76T400055.00-000 exemplifies B&R’s engineering philosophy: modularity without compromise. By merging 0.55 kW output with integrated filtering, braking, and grounding, it delivers a future-proof power stage for demanding servo applications. When combined with the computational prowess of the P74/P76 modules and Automation Studio’s configurability, this base device becomes a cornerstone for efficient, high-dynamics automation—proving that even mid-power drives can drive transformative performance in modern industrial systems.