BPW-S3 The BPW-S3 is a medium power brushless PWM servo amplifier in a 3E size Edge Mount format. It is ideally suited to torque control applications or for velocity control using a digital position controller. This amplifier is designed for 10V analog command input and self commutation using Digital Hall effect sensors. Look to the BPW-S4 if PWM command input is required.

Built using Surface Mount Technology, the BPW-S3 offers many advanced features in a compact package. An on board converter powers all the amplifier circuitry and Hall Effect sensors by using the Bus Voltage, eliminating the need for an external Bias supply. This unit is ideal for upgrading older brush-type systems to brushless motors. The high PWM frequency allows for greater amplifier bandwidth and helps motors to run cooler. The BPW-S3 includes Travel Limit and Amp Enable inputs, and Current Monitor and Amp Fault outputs.


  • 3E Edge Mount Format
  • Commutation Using Digital Hall Effect Sensors
  • 10V Analog Command Input
  • Completely Powered from Bus Voltage
  • Travel Limit and Amp Enable Inputs
  • Over and Under Bus Voltage Shutdown
  • Over Current Bus Protection
  • Current Monitor and Amp Fault Outputs
  • PWM Frequency: 80 kHz
  • Bus Voltage: 20 - 60 VDC
  • Continuous Current: 2 or 4 Amperes
  • Designed for Three-Phase Wye or Delta Wound Motors
  • Advanced Design, Superior Quality and High Reliability
  • One Year Parts and Labor Warranty


Standard Models: 6/10
Bus Voltage 20 to 60  VDC
Peak Output Current* 10 A for .5 Sec
Continuous Output Current* 5 A
Command Input Voltage 0 to 10V
Command Input Impedance 10 kOhm
Minimum Load Inductance 0 H
Switching Frequency 80 kHz
Torque Gain 1.0 A/V
Bandwidth 20 KHz
Weight 0.46 Lb (209 g)
Recommended Chassis EPS, LDP

*All ratings with forced air cooling to maintain 40C heat sink temperature. Failure to keep constant air flow to the heat sink will reduce the output current capacity and may result in damage to the unit.

Ordering Information

Product Order Number
BPW-S3-6/10 Amplifier 60 VDC/10A Peak WS-004-0006

Click here to download this data sheet.

All data sheets are in Adobe Acrobat format.