SMTBD1/1A-220/70 - Speed amplifier Module - INFRANOR

INFRANOR SMTBD1/1A-220/70 Variable Speed Drive - BD1 Series Servo Control

The INFRANOR SMTBD1/1A-220/70 is a variable speed drive from the BD1 series designed for precise control of synchronous AC brushless motors with resolver feedback. It addresses the needs of industrial maintenance teams, machine builders and retrofit projects where reliable speed and torque regulation, quick commissioning and predictable diagnostics are critical to uptime. Powered from a nominal 310 VDC DC bus, with a permissible range of 270 to 340 VDC, the unit delivers a rated current of 70 A and supports 240 A peak for 1 second to handle acceleration or transient load demands. A wide programmable speed window, auto-configuration and auto-tuning functions facilitate straightforward setup, while EEPROM parameter storage and on-front fault indication simplify service. Packaged as a 6U double Eurocard assembly combining an IGBT power board and DSP logic board, the drive is engineered for industrial environments up to +40°C with forced air cooling.

Technical specifications

• Manufacturer reference: SMTBD1/1A-220/70
• Series: BD1 servo variable speed drive for AC brushless axes
• Manufacturer: INFRANOR
• Control type: Speed and torque control in closed loop with resolver feedback, analog command ±10 V
• DC bus supply: 310 VDC nominal, operating range 270 to 340 VDC
• Auxiliary supply: 200 to 340 VDC
• Rated output current: 70 A
• Maximum output current: 240 A for 1 s
• Programmable maximum speed: 100 to 14,000 rpm
• Speed range: up to 2048:1 with 12-bit standard, up to 32768:1 with optional 16-bit
• Speed loop bandwidth: selectable 50, 75 or 100 Hz
• Command input: analog ±10 V, 12-bit resolution standard, optional 16-bit
• Feedback and encoder simulation: resolver feedback, encoder replica A/B channels plus marker, up to 8192 ppr
• Output to motor: three-phase sinusoidal drive for synchronous AC brushless motors
• Mechanical format: 6U double Eurocard, IGBT power board plus DSP logic board
• Cooling and environment: forced-air cooling 56 to 90 l/s, ambient up to +40°C
• Setup and storage: serial link for parameterization, parameters saved in EEPROM
• Diagnostics: errors displayed on the front panel for rapid troubleshooting
• Compliance: EN 60204-1

BD1 series overview

The INFRANOR BD1 family is designed for servo applications that require stable torque production and accurate speed regulation with resolver-based feedback. The architecture combines a robust IGBT power stage with DSP control, enabling deterministic loops and practical commissioning on production equipment. The interface concept is intentionally straightforward, built around an analog ±10 V command and encoder simulation output, which eases migration from legacy servo amplifiers and supports seamless integration with existing PLC or CNC architectures where analog motion references are standard. Thermal management and component selection are aligned with continuous-duty operation in industrial cabinets at moderate ambient temperatures, with forced-air flow to maintain performance stability over time.

• Speed and torque mastery: resolver closed loop for repeatable dynamics, selectable speed loop bandwidth, and extended speed ratios to match diverse mechanical ratios.
• Serviceability and commissioning: auto-configuration, auto-tuning, parameter EEPROM storage and clear front-panel fault codes to reduce start-up and maintenance time.

The model SMTBD1/1A-220/70 sits in this range as a high-current module with a 70 A nominal capability and short-term 240 A peak headroom, suited to applications that combine rapid acceleration with precise low-speed behavior.

Industrial applications

This variable speed drive integrates efficiently in many motion tasks where precise regulation and high dynamic response are required:

• Packaging and converting: web handling, tension control, feed rollers and synchronized sections.
• CNC and machine tool auxiliaries: feed axes, auxiliary spindles and positioning tables.
• Material handling: conveyors with torque limits, indexing units and pick-and-place mechanisms.
• Textile and winding: winders, unwinders and dancer-controlled zones requiring stable low-speed torque.
• Testing and benches: torque regulation for test rigs and controlled speed profiles.

Integration and communication

The SMTBD1/1A-220/70 interfaces natively with automation systems through an analog ±10 V command for speed or torque reference. The encoder simulation output provides A, B and marker signals up to 8192 ppr for position feedback to a PLC, CNC or motion controller, which simplifies closed-loop coordination at the line level. Commissioning and diagnostics are handled through a serial link, with parameters retained in EEPROM. On the front panel, explicit error indications accelerate root-cause analysis and support preventive maintenance routines.

Given its DC bus 310 VDC architecture and resolver feedback, this BD1 series unit is well suited to retrofits where an existing DC link is available or where multi-axis DC bus sharing is part of the design. The selectable speed loop bandwidths, wide speed ratio and optional 16-bit resolution provide the levers needed to fine-tune performance according to the mechanical transmission and load inertia.

Availability and warranty

The INFRANOR SMTBD1/1A-220/70 variable speed drive is available through Standard Exchange Industry in reconditioned supply or via standard exchange, tested on dedicated benches and delivered with a warranty. Shipment is organized in 24 to 72 hours to more than 120 countries. In the event of a breakdown or obsolescence on your automation line, our technical team can help validate compatibility within the BD1 ecosystem, identify the correct reference and propose alternatives, including a repair service when appropriate. This approach minimizes downtime while preserving the performance profile expected on synchronous AC brushless applications.