BL series amplifiers are highly reliable linear brushless servo
amplifiers that are easily adaptable to drive brush or brushless
servomotors. The BL amplifier package is a complete modular
unit that includes heat sink, metal cover, control, and bus power
supplies that operate at ±40 VDC (@ 20 amps peak) or ±80
VDC (@ 10 amps peak). The BL drives provide the designer with
servo drive flexibility for use in applications such as CMM (Coordinate
Measurement Machines), X-Y stages, inspection and scanning, medical
device fabrication, and semiconductor fabrication.
The BL drives feature a self-commutation mode using analog or
digital Hall effect feedback signals. The BL drives even include
a 5 VDC, 250 mA supply to power encoders and Hall effect devices
(HEDs). Each model is jumper selectable, providing the capability
to drive both brush and brushless motors in current (torque) mode,
velocity mode, etc.
Complete electrical isolation is provided between the control
stage and the power stage for all models of the BL series. This
is accomplished with a transformer-isolated control voltage power
supply and opto-isolation of the drive signals, current command
signals, and fault signal between the control and power stages.
Each drive is fully protected against control power supply under
voltage, rms current limit exceeded, power stage bias supplies
under voltage, over temperature, over current, and excessive power
transistor dissipation.
Operating modes include current command, velocity command, or
dual-phase command (for brushless modes of operation only). For
brush modes of operation, the available operating modes are current
command and velocity command.
Differential inputs are used for better noise immunity. Velocity
feedback is from either an encoder or tachometer, and logic inputs
include directional current limits and shutdown. Fault, current,
and velocity outputs simplify monitoring drive status. In addition,
the BL drive can drive three individual brush motors in torque
mode.
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