SMTBD1/1A-400/30 - Speed amplifier Module - INFRANOR

INFRANOR SMTBD1/1A-400/30 variable speed drive - SMT‑BD1 series

The SMTBD1/1A-400/30 is a servo variable speed drive module from the SMT‑BD1 series by INFRANOR. Engineered for precise control of AC synchronous servo motors, it integrates into a 19 inch multi‑axis rack to deliver accurate speed and torque regulation with resolver feedback. This module addresses maintenance and retrofit needs where fast replacement, deterministic dynamics and compact footprint are critical, including packaging, handling, winding processes and machine tool auxiliary axes. Its architecture separates power and logic on a 6U double Eurocard, combining IGBT power switching with DSP control to maintain stable current loops and consistent speed response. The drive accepts ±10 V analog commands from a PLC or CNC, outputs encoder emulation signals for position interfaces, and provides adjustable digital gains to match a wide range of servo mechanisms. In environments where production continuity is essential, the SMTBD1/1A-400/30 provides predictable commissioning, robust protection features and straightforward integration within existing INFRANOR racks.

Technical specifications

• Manufacturer reference: SMTBD1/1A-400/30
• Series: SMT‑BD1 pluggable servo drive modules
• Manufacturer: INFRANOR
• Type: 6U double Eurocard power module, IGBT power board plus DSP logic board, rack‑mounted multi‑axis configuration
• DC bus rating: 565 VDC nominal from 400 VAC rack input, up to 685 VDC maximum from 480 VAC rack input
• Maximum output current: 30 Arms, 1 s peak up to 30 Arms
• Motor speed range: adjustable, approximately 100 rpm to 14,000 rpm depending on motor and gearing
• Control mode: closed‑loop servo control for torque and speed with resolver feedback, PI2 speed regulator and digital gain adjustment
• PWM switching frequency: 10 kHz, current loop bandwidth greater than 1 kHz, selectable speed loop bandwidth 50 Hz, 75 Hz or 100 Hz
• Command and feedback: analog command ±10 V for speed or torque, resolver input, encoder emulation A, B, marker with programmable resolution up to 8192 ppr at 900 rpm
• Protection and limits: internal current limitation adjustable, Imax 20 to 100 percent and Irated 20 to 50 percent, operating temperature 5 to 40 °C, storage −40 to +70 °C, max ambient 50 °C

SMT‑BD1 family overview

The SMT‑BD1 family is INFRANOR’s rack‑based servo variable speed drive platform for synchronous AC motors in multi‑axis machines. It combines pluggable drive modules with a shared rack power supply to reduce cabinet footprint, simplify wiring and centralize thermal management. The architecture is suited to high‑performance axes requiring consistent current regulation and stable speed loops, while preserving straightforward analog interfacing for legacy automation systems.

• SMT‑BD1 modules: pluggable servo drives with integrated DSP control, resolver feedback handling, encoder emulation and ±10 V command input for closed‑loop torque and speed regulation.
• Multi‑axis rack concept: up to three axes with the rack power supply, facilitating compact installations, common DC bus utilization and simplified maintenance through modular board replacement.

The SMTBD1/1A-400/30 variant aligns with applications that demand up to 30 Arms with tight speed and torque control. Its 10 kHz PWM and greater than 1 kHz current loop bandwidth support repeatable response in dynamic cycles. The adjustable speed loop bandwidth allows tuning to mechanical resonance and load inertia, improving stability and product quality in continuous or indexed motion.

Industrial applications

This INFRANOR variable speed drive integrates reliably across numerous machine types where servo precision and rack density are required. Typical use cases include single‑axis or coordinated motion tasks driven by a PLC or CNC, particularly where analog command remains the standard interface.

• Machine tools and CNC auxiliaries: feed axes, auxiliary spindles and positioning tables requiring accurate speed control and encoder feedback compatibility.
• Packaging and converting: synchronized conveyors, rollers and draw mechanisms with selectable speed loop bandwidth for clean tension control.
• Material handling: gantries, pick‑and‑place units and transfer axes in automated assembly lines, using resolver feedback for robust operation in industrial environments.
• Textile and printing: winding and unwinding axes, dancers and section drives where fine torque regulation and encoder emulation aid registration.
• Robotics sub‑axes: auxiliary motion and tooling feeds where compact rack integration reduces cabinet complexity.

Integration and communication

The SMTBD1/1A-400/30 connects to automation systems via ±10 V analog command for speed or torque reference, with resolver sensor input for motor feedback. The drive provides encoder emulation on A, B and marker channels to interface position signals to a PLC or CNC expecting incremental encoder feedback. Digital gains and selectable speed loop bandwidths support tuning at commissioning to align the control response with the mechanics and process requirements.

Within a 19 inch rack, up to three axes can share the power supply. The common DC bus enables compact wiring and energy distribution, while the pluggable design eases replacement to minimize downtime. Current limiting parameters offer additional protection for the motor and mechanics. Operating conditions from 5 to 40 °C, with storage down to −40 °C, support deployment in standard industrial cabinets. Where fieldbus networking is required, it is typically implemented at the system or rack controller level, while this module focuses on deterministic servo regulation through analog command.

Availability and warranty

The INFRANOR SMTBD1/1A-400/30 variable speed drive is available as reconditioned supply or in standard exchange, tested on load and delivered with warranty according to the selected service. Standard Exchange Industry supports rapid dispatch within 24 to 72 hours to more than 120 countries. For urgent maintenance or retrofit, our technical team can qualify the exact SMT‑BD1 variant that matches your rack and motor, and advise on current rating, feedback configuration and commissioning parameters to restore your production with controlled risk and predictable lead time.