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PWM brushless servo motors up to 0.7KW
Description Standard Features Technical Specifications Safety Features
Optional Features Standard Types Downloads
The SBA is a miniature PWM, full wave, three phase servo amplifier designed for high performance brushless servo motors in the range of up to 0.7KW. servo amplifier for brushless servo motors
It utilizes power MOSFETs and Surface Mounting Technology which contribute to its high efficiency and compact design. The SBA is constructed from two PCBs mounted on a heat sink plate. The lower board contains the power switching transistors which drive the motor, terminals for the power stage, the switch mode power supply and the protection logic. The upper PCB contains the control logic, commutation logic, terminals for the control stage, adjusting trimmers and indication LED's. An optional third board is installed for velocity sensors others than a brush type tacho.
Standard Features
  • Internal DC to DC converter allows operation from a single supply
  • 20 KHz switching frequency (40KHz or 60KHz on request)
  • 2KHz current loop response
  • 97% efficiency
  • Output voltage is up to 90% of input voltage
  • Zero deadband
  • Better than 1% linearity
  • 2 inputs
  • Motor current monitor
  • Operation in velocity or current mode
  • Remote inhibit
  • Inhibit/fault indication (logic level)
  • Latch/self-restart modes for protective functions
  • Adjustable compensation
  • External current limit inputs
  • Current feedback multiplier
  • Input balance (offset)
  • LED diagnostics
  • Removable terminals (Panel mount type) for easy installation and service
  • Standard commutation sensors: Hall effect, Resolver, or Tachsyn
  • Outputs voltages of +5V and +13V for external use
Technical Specifications
  • DC output voltage is 90% of DC input voltage
  • 20KHz, 40KHz or 60KHz switching frequency
  • 2KHz current loop response (minimum)
  • Outputs voltages of +5V, +13V for external use
  • Efficiency at rated current - 97%
  • Drift: 10µV/°C (referred to input)
  • Operating temperature: 0-50°C
  • Storage temperature: -10 - +70°C
Safety Features
  • Under/over voltage
  • Shorts between: outputs, output to ground
  • Excess temperature
  • Loss of commutation signals
Optional Features

Resolver option features:

  • Primary (input) frequency: 0.1KHz to 20KHz, set by user
  • Primary (input) voltage: < 7Vrms
  • Primary (input) current: < 50mA
  • Secondary (output) voltage: > 2Vrms
  • 10, 12, 14 and 16 bit resolution, set by user.Maximum tracking rate 1040 rps (10 bit)
  • Encoder A,B outputs & a programmable index output

Optical encoder velocity feedback features:

  • Speed regulation: 500:1
  • Encoder frequency: x1 or x4
  • Encoder output voltage range: 2-30V
  • Output supplies: 5V/50mA, 12V/20m
Standard Types
Type
DC Supply Min.-Max.(V)
Current limits Cont./Peak(A)
Size (mm)
Weight (Kg)
SBA-15/55
VAC
14
14
80
SBA-10/100
VAC
65
65
135
SBA-5/200
VDC
20
20
110
Product Catalog Number: