SMTBD1/1A-220/100 - Speed amplifier Module - INFRANOR

Variable speed drive INFRANOR SMTBD1/1A-220/100 - SMT-BD1 series

The SMTBD1/1A-220/100 variable speed drive belongs to the SMT-BD1 servo amplifier series from INFRANOR. Engineered for AC brushless motors with resolver feedback, it provides precise torque and speed regulation for industrial motion axes where stability, repeatability and fast commissioning are required. With a 220 VAC supply feeding a nominal 310 VDC bus, a rated phase current of 100 Arms and 240 Arms peak for 1 second, this drive addresses demanding applications that combine high dynamics with robust thermal management. The analog setpoint interface ±10 V, a selectable speed loop bandwidth, and built-in auto-phasing and auto-tuning shorten start-up times while safeguarding the motor through current limiting and controlled ramps from 0 to 32 s. A programmable encoder emulation output (A/B with index) up to 8192 ppr simplifies interfacing with PLCs and CNC position controllers. The SMTBD1/1A-220/100 integrates opto-isolated logic I/O for enable and limits, operates with a 10 kHz PWM stage, and fits a compact 6U double Eurocard form factor suitable for cabinet installations in harsh industrial environments.

Technical specifications

• Manufacturer reference: SMTBD1/1A-220/100
• Series: SMT-BD1 servo amplifier
• Manufacturer: INFRANOR
• Type: Variable speed drive for AC brushless servo motors
• Input supply: 220 VAC
• DC bus voltage: 270 to 340 VDC, nominal 310 VDC
• Rated output current: 100 Arms
• Peak current: 240 Arms for 1 s
• Control modes: Direct torque and speed control with resolver feedback
• Speed range: Adjustable, approx. 100 to 14,000 rpm
• Speed loop bandwidth: selectable 50, 75 or 100 Hz
• Analog command: ±10 V for speed or current, 12-bit standard, 16-bit optional
• Current limit input: 0 to 10 V
• Encoder emulation: A/B quadrature with index, programmable up to 8192 ppr
• PWM frequency: 10 kHz
• Ramps: 0 to 32 s adjustable acceleration and deceleration
• Logic I/O: opto-isolated 5 to 24 V, enable and limit inputs
• Form factor: 6U double Eurocard module, separate power and logic DSP boards

SMT-BD1 series overview

The SMT-BD1 family is designed for industrial servo applications that require deterministic torque control, stable low-speed regulation and tight speed tracking under variable loads. The architecture combines a resolver interface, a high-efficiency power stage with 10 kHz switching and a DSP-based control core. Commissioning is streamlined by automatic phasing and auto-tuning routines that evaluate the motor-resolver pair, then compute loop gains and compensations to achieve the desired bandwidth. With analog setpoints, opto-isolated logic, and a cabinet-friendly Eurocard format, SMT-BD1 modules integrate into brownfield and greenfield panels with minimal rework.

• SMT-BD1 speed amplifiers: Core modules for torque and speed control of AC brushless motors using resolver feedback, suited to axes that require stable regulation over a wide mechanical range.
• Accessories and options: Analog input resolution up to 16-bit, programmable encoder emulation for A/B channels with index, and parameter features such as adjustable ramps and current limiting for process safety.

The model SMTBD1/1A-220/100 sits within this range as a high-current variant capable of delivering 100 Arms continuous with short-term peaks to 240 Arms for transient demands.

Industrial applications

This variable speed drive integrates into motion systems where precise speed and torque control are central to throughput and quality. Typical use cases span multiple sectors, from continuous processes to discrete manufacturing, and benefit from the resolver-based feedback and encoder emulation that simplify synchronization with automation controllers.

• Packaging and converting: Web handling, unwinding and rewinding with tension control, cut-to-length axes and registration tasks.
• Material handling: Conveyor drives, indexing tables and transfer units requiring smooth ramps and repeatable positioning via external controllers.
• Machine tools and CNC peripherals: Feed axes, auxiliary spindles and rotary positioning where torque linearity and stable low-speed behavior are required.
• Textile and printing: Precise speed tracking across rollers, dancer-controlled sections and synchronized rollers using encoder emulation to the PLC/CNC.
• General automation: Robotics peripherals, winding stations and test benches with analog command from a PLC or motion controller.

Integration and communication

The SMTBD1/1A-220/100 interfaces natively through ±10 V analog setpoints for speed or current, complemented by opto-isolated logic inputs for drive enable, limits and interlocks. Its encoder emulation output provides incremental A/B channels with index to feed high-speed counters in PLCs or position modules, reducing the need for separate encoder splitters. Resolver feedback ensures robust measurement in electrically noisy environments and at high speeds. Loop bandwidth selections of 50, 75 or 100 Hz allow balancing dynamic response with mechanical resonance avoidance.

Commissioning is facilitated by auto-phasing and auto-tuning, while adjustable 0–32 s ramps help protect mechanics and products. The 10 kHz switching frequency supports low torque ripple and reduced acoustic noise on the motor. Where fieldbus communication is required, integration is typically achieved at the PLC level using the analog and digital interfaces. Protocol availability may depend on associated control hardware and options, therefore it is recommended to validate interface requirements with your engineering team prior to retrofit or replacement.

Availability and warranty

This INFRANOR SMTBD1/1A-220/100 variable speed drive is available as reconditioned supply or via standard exchange, functionally tested on a dedicated bench and delivered with warranty. Standard Exchange Industry ships within 24 to 72 hours to more than 120 countries and supports three services: exchange, supply of new or refurbished equipment, and repair. If your production line is down or you are planning a preventive replacement, our technical team can verify compatibility within the SMT-BD1 series, confirm electrical ratings against your motor data and assist with commissioning parameters.