Aerotech BAL LINEAR AMPLIFIER SERIES, User Manual, Page: 38 / 56

Technical Details BA Linear Series User’s Manual
3-2
Aerotech, Inc.
Version 1.5
3.2. Electrical Specifications
The electrical specifications and connector J6 pinouts for all BAL drive models are listed
in Table 3-3.
Table 3-3. Electrical Specifications
Model Units BAL20-40 BAL10-40 BAL10-80
Output Voltage (brushless)
1
VDC 80 80 160
Input Voltage VAC 115 to 240
Output Voltage (brush) VDC 40 40 80
Peak Output Current A
pk
20 10 10
Continuous Output Current A
pk
10 5 5
Pk Power Dissipation (per phase)
2
Watts 300
Peak Output Power
3
Watts 1,350
Continuous Output Power
3
Watts 675
Pre-amplifier Gain dB 100
Power Amplifier Gain (each phase)
2
A/V 2 1 1
Power Amplifier Bandwidth kHz 2 2 2
Minimum Load Inductance mH 0.5 1 1
Minimum Load Resistance (line-to- neutral) Ohms 0.5
Operating Temperature
°
C
0 to 50
Storage Temperature
°
C -30 to 85
Weight lb (kg) 17.3 (7.9)
1. The BAL Series can drive each of its phases “rail to rail” since the drive supply for each phase is not derived from the +/- bus voltages.
2. Each phase of the BAL Series contains an instantaneous power limit circuit that allows a maximum amount of power dissipation to exist
on each of the output power transistors under any operating condition.
3. This specification based on the output power transistors in the saturated (e.g., full on) condition.
Modes of Operation
(jumper selectable)
Brushless:
- single current command with on-board 6 step (or sine wave [optional]) commutation
from HED inputs.
- dual phase commands with sinusoidal commutation provided by an external motion
controller, third phase command is derived from the amplifier.
- velocity command with 6-step (or sine wave [optional]) commutation from HED
inputs and velocity feedback from the tach or encoder.
Brush:
- single current command.
- velocity command with velocity feedback from the tach or encoder.
Command Inputs
- +input-Pin 8, -input-Pin 21: Differential inputs for current or velocity commands, 0 to
±
10 VDC input. “+input” (non-Inverting input) can be used in single ended fashion. A
positive voltage on this input causes CCW motor rotation. “-input” (inverting input) can
be used in single ended fashion. A positive voltage on this input causes CW motor
rotation.
- icmda-Pin 9, icmdb-Pin 22: icmdc-Pin 12 phase,
±
10V input. ICMDA (current
command A) and ICMDB (current command B) are jumper selectable current
command inputs. They bypass the differential input, pre-amplifier, and self
commutation circuit. They are to be used with controllers that provide external velocity
loop and commutation control. (icmdc optional)