SMTBD1/1H-220/17 - Speed amplifier Module - INFRANOR

Variable speed drive INFRANOR SMTBD1/1H-220/17, SMT-BD1 series

The INFRANOR SMTBD1/1H-220/17 is a variable speed drive from the SMT-BD1 series designed for precise closed-loop control of speed and torque on servo motors equipped with a resolver transducer. It addresses the needs of maintenance teams, machine builders, and retrofit projects that require stable regulation, deterministic behavior, and straightforward integration with existing PLC or CNC infrastructures. Operating from a regulated DC bus and commanded via a ±10 V analog reference, this drive combines a DSP-based control board with an IGBT power stage to deliver fast response, smooth ramps, and reliable protection. Its embedded PI speed controller features selectable bandwidth settings, the resolver interface ensures robust position and speed feedback, and the quadrature encoder emulation facilitates drop-in compatibility with controllers expecting A, B, and Z signals. With auto-tuning and parameter auto-configuration over a serial link, commissioning is controlled, repeatable, and time efficient, making this unit a consistent choice for industrial speed control.

Technical specifications

• Manufacturer reference: SMTBD1/1H-220/17
• Series: INFRANOR SMT-BD1 speed amplifier family
• Manufacturer: INFRANOR
• Type: Variable speed drive module, 6U double Eurocard, DSP logic board with IGBT power stage
• DC bus supply: 270 to 340 VDC nominal 310 VDC
• Command interface: ±10 V analog reference, 12-bit resolution standard, 16-bit optional
• Speed control: PI regulator with programmable bandwidth 50, 75, or 100 Hz
• Acceleration and deceleration: Adjustable ramps from 0 to 30 s
• Maximum speed setting: Adjustable from 100 to 14000 rpm
• Speed range: 2048:1 standard, up to 32768:1 with option
• Feedback interface: Resolver transducer for closed-loop speed and torque control
• Encoder emulation: Quadrature A, B, Z signals up to 8192 ppr
• Parameterization: Serial link for setup, auto-configuration, and auto-tuning
• Diagnostics: Front panel indication with error codes for rapid troubleshooting
• Output stage: Three-phase motor drive derived from DC bus, application dependent current
• Control mode: Closed-loop speed and torque with resolver feedback, analog setpoint, not V/Hz scalar

SMT-BD1 series overview

The INFRANOR SMT-BD1 series is engineered for applications that demand deterministic speed regulation and robust operation in industrial environments. The architecture separates the logic and power functions for serviceability and thermal stability, while keeping commissioning predictable through parameter files and guided auto-tuning. The series focuses on analog command compatibility and feedback integrity, enabling integration into brownfield plants where reliability and maintainability drive decisions.

• Standard resolver-based speed amplifiers: Analog ±10 V command, PI speed loop with selectable bandwidth, encoder emulation to interface directly with PLC or CNC expecting A, B, Z inputs.
• Extended resolution options: 16-bit command input and high ratio 32768:1 speed range variants for applications requiring fine speed setpoint granularity and low-speed stability.

The SMTBD1/1H-220/17 aligns with the resolver-based speed amplifier profile and is suited to mid-range servo axes where reproducible speed ramps and consistent torque response are required.

Industrial applications

This variable speed drive integrates into new machines and retrofit projects where the control system provides an analog setpoint and expects encoder feedback. Typical use cases span motion tasks with steady speed, frequent starts and stops, and coordinated sections that benefit from deterministic ramps and tight regulation. Its resolver interface and encoder emulation support interoperability with legacy and modern controllers.

• Conveyors and material handling: Speed control of translation and accumulation axes with smooth acceleration to protect product flow.
• Packaging and converting: Roller drives, infeed and outfeed sections, and web handling requiring stable speed and ramp repeatability.
• Textile and printing lines: Winder and unwinder axes with resolver feedback for robust low-speed behavior and tension-sensitive sections when paired with external control loops.
• Machine tools and spindles: Controlled speed operation on auxiliary axes and spindles where analog command from CNC is standard practice.
• Process equipment: Pumps and fans in regulated processes when a resolver-equipped motor is used and closed-loop speed is required.
• Robotics and positioning stages: Aux axes with encoder feedback emulation to the robot controller for consistent synchronization.
• Retrofit of legacy drives: Direct replacement where a ±10 V command and resolver are already present, minimizing changes to PLC logic.

Integration and communication

The SMTBD1/1H-220/17 connects to control systems through a ±10 V analog input for speed or torque reference and discrete I/O for enable, fault, and direction as defined by the application. The embedded resolver interface closes the loop on motor speed and provides derived quadrature encoder signals, enabling seamless connection to controllers that read incremental encoders for speed or position capture. Commissioning is performed via a serial service link that grants access to parameter sets, diagnostics, and tuning functions. The PI speed regulator bandwidth can be set to 50, 75, or 100 Hz to align response with mechanical resonance and process stability. Accel and decel ramps from 0 to 30 s allow precise shaping of motion profiles in coordination with upstream PLC tasks.

The power stage is supplied from a 270 to 340 VDC bus, nominal 310 VDC, which can be derived from an appropriate front-end rectifier. Output to the motor is three-phase, generated by the IGBT stage under DSP control. Power in kW and HP is application dependent and determined by motor selection and axis duty cycle. For systems requiring fieldbus connectivity, the analog command and encoder emulation architecture integrates cleanly with PLC and motion controllers via existing I/O, while serial parameter access supports maintenance workflows. Front panel indicators present error codes to accelerate root-cause analysis during commissioning and service.

Availability and warranty

Standard Exchange Industry supplies the INFRANOR SMTBD1/1H-220/17 as part of its variable speed drive offering, with options for reconditioned supply, standard exchange, or repair. Each unit is functionally tested on a dedicated bench prior to shipping and is covered by a warranty window aligned with the selected service. Shipment is organized within 24 to 72 hours to more than 120 countries, ensuring minimal downtime for maintenance teams. If your production line is stopped or you are preparing a planned retrofit, our technical team can assist with identification, interchangeability checks within the SMT-BD1 series, and practical guidance on parameter migration and start-up. This approach reduces risk, shortens commissioning time, and helps you restore or improve the performance of resolver-based variable speed axes without redesigning your automation architecture.