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Atlas® Digital Amplifiers

Atlas® Digital Amplifiers are compact single-axis amplifiers that provide high-performance torque control for Brushless DC, DC Brush, and Step motors. They are packaged in a compact, solderable module and are ideal for use in positioning motion control, velocity control, and precision force control applications. Atlas amplifiers come in both a vertical and horizontal mounting configuration and are available in three power ranges; 75W, 250W, and 500W. They are ideally suited for applications such as medical equipment, laboratory automation, scientific instruments, general-purpose motion control, force feedback, and actuator control.

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Description

Atlas® Digital Amplifiers are compact single-axis amplifiers that provide high performance torque control for DC Brush, Brushless DC, and step motors. They are packaged in a compact, solderable module and are ideal for use in positioning motion control, velocity control, and precision force control applications.

High Performance in an Ultra Compact Package

Atlas Digital Amplifiers are used for direct control of motor torque, or in conjunction with higher level motion controllers. Their very compact size and high-power output make them ideally suited for applications such as medical equipment, laboratory automation, scientific instruments, general purpose motion control, force feedback, and actuator controls. ATLAS Amplifiers are provided in vertical and horizontal mounting configurations, with three power levels, and two package sizes.

Advanced Amplifier Technology

Atlas Digital Amplifiers utilize PMD’s proprietary digital current control and switching technology for exceptional efficiency and quiet motor operation. Control features include user-programmable gain parameters, performance trace, field-oriented control, and I2t current management. Atlas amplifiers are internally powered from a single motor supply voltage, and provide automatic protection from overcurrent, undervoltage, overvoltage, overtemperature, and short circuit faults.

Easy to Use

The Atlas family has been designed to work seamlessly with PMD’s Magellan motion control ICs. Alternatively, they can be used with dedicated FPGAs, digital signal processors, or general-purpose microprocessors. Communication is via SPI (Serial Peripheral Interface) using a simple, packet-oriented protocol. For step motors, in addition to the SPI format a pulse and direction input mode is provided.

 

Atlas Connection Diagram

 

Features

  • Ultra-efficient all digital solderable power amplifier
  • Controls Brushless DC, step, and DC Brush motors
  • Available in 75W, 250W, and 500W power levels
  • Operating supply voltage range of 12V to 56V
  • Field oriented control
  • Overcurrent, overvoltage, and undervoltage protection
  • Single supply operation from motor bus voltage
  • Fully digital current control
  • I2t current foldback limiting
  • On-board performance trace and motor parameter storage in NVRAM
  • Multi-motor version allows motor type to be programmed by user
  • SPI (Serial Peripheral Interface) eliminates analog +/- 10 V torque signals
  • Pulse and direction input for step motor operation
  • Internal temperature monitor
  • FOC (Field Oriented Control)
  • Two different package sizes available
  • Enable input and Fault output safety interlocks
  • Works with Magellan® ICs, FPGAs or microprocessor-based controllers
  • Comes in horizontal and vertical mount configurations
  • Digital SPI torque command with checksum
  • Industry leading efficiency and power density
  • Full RoHS compliant and CE marked
  • Up to 14A continuous, 25A peak motor output
  • User programmable current loop gain values

Internal Block Diagram

Atlas Digital Amplifier Internal Block Diagram

 

Part Numbers

Ordering Information

For Ordering Atlas Units

For Ordering Atlas Developer Kits

Atlas Ordering Information

 


 

Part Numbers

Part Number
Power Level  (Continuous)
Voltage Size
Mounting Style Motor Type
Step Motor
MD241048/02VB Low (75W) 12-48V Ultra Compact Vertical Step Motor
MD241048/02HB Low (75W) 12-48V Ultra compact Horizontal Step Motor
MD241048/05VB Medium (250W) 12-48V Ultra compact Vertical Step Motor
MD241048/05HB Medium (250W) 12-48V Ultra compact Horizontal Step Motor
MD141056/25VB High (500+W) 12-56V Compact Vertical Step Motor
MD141056/25HB High (500+W) 12-56V Compact Horizontal Step Motor
Brushless DC
MD211048/02VB Low (75W) 12-48V Ultra compact Vertical Brushless DC
MD231048/02HB Low (75W) 12-48V Ultra compact Horizontal Brushless DC
MD231048/05VB Medium (75W) 12-48V Ultra compact Vertical Brushless DC
MD231048/05HB Medium (75W) 12-48V Ultra compact Horizontal Brushless DC
MD131056/25VB High (500+W) 12-56V Compact Vertical Brushless DC
MD131056/25HB High (500+W) 12-56V Compact Horizontal Brushless DC
DC Brush
MD211048/02VB Low (75W) 12-48V Ultra compact Vertical DC Brush
MD211048/02HB Low (75W) 12-48V Ultra compact Horizontal DC Brush
MD211048/05VB Medium (250W) 12-48V Ultra compact Vertical DC Brush
MD211048/05HB Medium (250W) 12-48V Ultra compact Vertical DC Brush
MD111056/25VB High (500+W) 12-56V Compact Vertical DC Brush
MD111056/25HB High (500+W) 12-56V Compact Horizontal DC Brush
Multi Motor
MD281048/02VB Low (75W) 12-48V Ultra compact Vertical Multi Motor
MD281048/02HB Low (75W) 12-48V Ultra compact Horizontal Multi Motor
MD281048/05VB Medium (250W) 12-48V Ultra compact Vertical Multi Motor
MD281048/05HB Medium (250W) 12-48V Ultra compact Horizontal Multi Motor
MD181056/25VB High (500+W) 12-56V Compact Vertical Multi Motor
MD181056/25HB High (500+W) 12-56V Compact Horizontal Multi Motor

 

Specifications

Specifications

Parameter Value
Supported motor types Brushless DC, step motor, DC Brush, and multi-motor
PWM frequency 20, 40, 80, 120 kHz
Current Loop rate 20 kHz
Microstepping resolution 256 microsteps per full step
User Programmability Non-volatile RAM user configuration storage
Trace Memory 2 KB
I/Os FaultOut, Enable
Safety Short Circuit, OverCurrent, I2t Current Foldback, SPI Watchdog, Overvoltage, Undervoltage
Operating Temperature 0° - 40° C
Compliance RoHs, CE LVD:EN60204-1, EMC-D: EN61000-6-1, EN61000-6-3, EN55011
UL Designed to UL508C, UL840, and EN60204-1

 

Mechanical Dimensions

Model Length (L) Width (W) Height (H)
Ultra Compact Vertical 1.054 in
(26.8 mm)
1.051 in
(26.7 mm)
0.526 in
(13.4 mm)
Ultra Compact Horizontal 1.054 in
(26.8 mm)
1.051 in
(26.7 mm)
0.526 in
(13.4 mm)
Compact Vertical 1.520 in
(38.6 mm)
1.517 in
(38.5 mm)
0.600 in
(15.2 mm)
Compact Horizontal 1.520 in
(38.6 mm)
1.517 in
(38.5 mm)
0.600 in
(15.2 mm)

 

Digital Amplifier Mechanical Dimensions

 

Ratings & Compliance

Specifications

Model Voltage Input
Peak Current Continuous Current Package
Low Power, Brushless DC 12-48V 3.8 Amps 1.5 Arms Ultra Compact
Low Power, step motor 12-48V 3.8 Amps 1.5 Arms Ultra Compact
Low Power, DC Brush 12-48V 3.8 Amps 1.5 ADC Ultra Compact
Medium Power, Brushless DC 12-48V 12.5 Amps 5.0 Arms Ultra Compact
Medium Power, step motor 12-48V 12.5 Amps 4.5 Arms Ultra Compact
Medium Power, DC Brush 12-48V 12.5 Amps 7.0 ADC Ultra Compact
High Power, Brushless DC 12-56V 25.0 Amps 10.0 Arms Compact
High Power, step motor 12-56V 25.0 Amps 9.0 Arms Compact
High Power, DC Brush 12-56V 25.0 Amps 14.0 ADC Compact

 

Safety and Compliance

Specification Standard
CE LVD: EN60204-1
EMC-D: EN61000-6-1, EN61000-6-3, EN55011
Electrical safety Designed to UL508C, UL840 and EN60204-1
Hazardous materials RoHS compliant
Flammability UL94-HB
Enclosure IP20

 

Developer Tools

Get Started Today!

PMD Developer Kits and easy to use development tools make set-up, tuning, optimizing, and building your motion control application fast and easy.

Developer Kit includes:

  • 1 or 4 axis configuration supports all Atlas unit types
  • Pro-Motion® Software
  • Includes rugged L-bracket hardware
  • Complete manual set
  • Complete cable and prototyping connector set

 

Atlas Developer Kits

 

Developer Kit Part Numbers

Atlas Developer Kits

Developer Kit Part Number # of Axes Atlas Type
MDK1LI0000V 1 Vertical
MDK1LI0000H 1 Horizontal
MDK4LI0000V 4 Vertical
MDK4LI0000H 4 Horizontal

 

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