Board Indicators - Light emitting
diodes (LEDs) on the main printed circuit board indicate:
addition to the indicators listed above, twelve separate LEDs indicate that
each SCR is receiving gate pulses.
(Torque) Regulator - One percent
accuracy armature current regulator allows the operator to control motor
torque instead of speed.
Current Regulator - Built in
adjustable current regulator maintains constant field flux despite changes
in motor operating temperature.
Economy - Insures longer life for
wound field DC motors. May be easily by-passed to meet specific application
Four Quadrant Operation - Allows
operation of the drive motor in both the forward and reverse directions
while producing torque in either the clockwise or counterclockwise
Current Loop Regulator - Inherent
high band width capability for fast response.
Control Circuitry - Provides
complete isolation of the control and regulator circuitry from the AC power
bus for protection in the event of a ground fault. The speed potentiometer
and tachometer are not at line potential. Complete system compatibilities is
also possible without additional isolation accessories.
Set at Preset Speed - Separately
adjustable from zero to plus or minus 30% of base speed.
IR Compensation - Sometimes referred
to as Current Compounding, enables this drive to operate in load sharing
applications. This feature becomes available by jumper connection.
Lockout - May be selected by jumper
programming to prevent forward nor reverse motoring in certain applications.
Phase Control - Provides
significantly improved performance at low speeds and near zero load.
Adjustable Linear Accel/Decel Control -
Two ranges; 1.2-4 seconds and 2-30 seconds.
Regulator - Two percent accuracy
using armature voltage feedback with IR compensation or 1% accuracy with DC
tachometer feedback. Regulation may be improved by selecting the proper
motor mounted DC tachometer.
State Full Wave Power Bridge - Uses
generously rated power semiconductors for maximum reliability and long life.
A 12 SCR back to back power bridge means better form factor, improved
efficiency, better motor commutation and cooler motor operation.
Line Connections - The 2300RG is completely insensitive to AC line phase sequencing.
Control Circuit Boards - All 2300RG controls except the current feedback board utilize the same
PC boards regardless of HP, voltage, frequency or control model.
Frequency Operation - Controls may
be operated from 50 or 60Hz power supplies by simple jumper change.
Static Adjustable Current Limit -
Allows static setting of the desired current limit value without applying DC
power and without a connected output load.
Current Limit - Available by the
simple addition of a potentiometer of DC voltage input.
Adjustments - Maximum speed, zero
bias, acceleration time, deceleration time, IR compensation, current limit,
jog speed, velocity stability, speed rate, and current stability.
Trigger Circuits - Pulse transformer
isolated, hard firing, high frequency "burst" type pulse train
output from individually grated oscillators insures SCR conduction
regardless of the effects of line notching on the incoming AC power line.
Armature Loop Contactor - Full rated
and fully sequenced contactor assures positive disconnect of DC motor when
the stop push-button is pushed or whenever an under-voltage condition
Overload (Armature) - Senses
over-current conditions with inverse time shutdown.
Trip Circuit - Protective circuits
are designed to quickly shut the drive down whenever a drive fault condition
occurs. A visual indication of the fault condition is provided and six TTL
open collector logic level signals are available for remote fault
indication. The fault trip circuit prevents inadvertent drive restart after
a fault has occurred. It must be reset before the drive can run again.
Loss Protection - Provides
protection against runaway due to loss of motor field by shutting down the
Loss Protection - Shunts the drive
down to prevent damage to the control under single phase conditions.
Sink Thermal Switch - Prevents
long-term thermal damage to SCRs due to loss of heat sink cooling fan.
Speed Current Limiting SCR Semiconductor Fuses -
Provides the utmost in fuse coordination and protection of the SCRs and
motor with positive circuit clearing on both AC and DC faults.
Over-correct Protection - Senses
armature fault currents quickly to protect both semiconductors and motors
against damaging current levels.
Snubber Networks - Prevents
interaction and SCR DV/DT failures, due to line spikes and transients.
Provides DI/DT protection during SCR turn-on and aids in SCR turn-off during
SCR commutation, thus minimizing the effects of AC power-line notching.