Customer
Programmable:
- Input voltage 120 or 240 V
- Current range (Horsepower)
- Armature voltage feedback (90 or 180 VAC)
- Tach Feedback
- Torque or Speed Regulation
- IR Compensation (negative or positive)
- 10% reverse operation
- 50 or 60 Hz
- Accel/Decel time range .2-4/2-30 seconds
- Ammeter full scale reading (150% or 200%)
GENERAL DESCRIPTION
The 2600RGDC Drive is a high performance, regenerative DC motor control.
Included are many standard features that are available only as
options on many other single-phase regenerative drives.
Accessibility to all important internal regulator points is
provided by terminals on the control. This permits the 2600RG to
be used in custom engineered applications, as well as in standard
speed regulated applications. The 2600RG was designed to handle
most single phase regenerative drive applications without the
addition of external hardware and the need for costly,
time-consuming engineering.
Three control models handle the entire 1/4 to 7 1/2HP range of
applications. Drive current limit and inverse time overload
protective circuits for rating within this range are calibrated by
means of a jumper change on the main printed circuit board.
The 2600RG DC Drive controls a DC motor's speed or torque by varying the DC
voltage applied to the motor's armature. Because the control is
regenerative, it can provide power to the load and return that
power to the AC power line. Rectilinear phase control assures
stable operation at low speeds and smooth transitions between
motoring and regenerative modes (zero deadband).
The 2600RG DC Drive is a versatile control. Simple jumpered programming
allows the 2600RG to operate from either 120 or 240 volt AC input
power at 50 or 60 Hz. Additional jumpers program the control to
operate as either a speed regulator with armature voltage or DC
tachometer feedback or as a torque regulator with armature current
feedback. Two control models cover the entire 1/4 to 5HP range of
applications. Drive current limit and inverse time overload
protective circuits for ratings within this range are calibrated
by means of a jumper change on the main printed circuit board. DC
output current varies as a function of an input reference voltage
in torque regulated applications. Changing the torque reference
(potentiometer setting) results in a change in motor torque
output.
The 2600RG DC control converts single phase AC input power to
variable voltage DC output power. The DC output is applied
directly to the DC motor armature. DC output voltage varies as a
function of an input reference voltage in speed regulated
applications. (Typically, this input reference voltage is provided
by an operator adjustable potentiometer). Changing the speed
reference (potentiometer setting) results in a motor speed change.
The 2600RG DC control is designed for use with either shunt wound or
permanent magnet DC motors. A fixed voltage unregulated DC source
is provided for connection of the motor field in wound field
applications. Included in the 2600RG DC control are many built-in
features not available on competitive units. Motor field economy
and separately adjustable rates of acceleration and deceleration
are included on all units. If desired, the built-in Accel-Decel control ramps can be by-passed completely by a jumper change on
the control. Current compounding can be added to the speed
regulator by changing another jumper position. Current limit is
normally set by a potentiometer located on the main printed
circuit board, but if desired, it can be adjusted using a remote
mounted potentiometer or a customer supplied voltage signal. An
output signal is available for use with one of the 2600RG ammeter
kits to provide an indication of drive output current without the
addition of an ammeter shunt. On occasion, customer requirements
may dictate that the operator's devices be mounted on the door of
the enclosure.
STANDARD FEATURES
- Circuit Board Indicators - Light emitting diodes
(LEDs) of the main circuit board indicate: DC overload, Field
Loss, Instantaneous Over-current Trip, Run Mode, Jog Mode,
SCR's Being Gated, Fault Trip Circuit. Protective circuits are
designed to quickly shut the drive down and provide a visual
indication whenever a DC overload, field loss, or
instantaneous over-current condition occurs. This fault trip
circuit prevents restart. It must be reset before the drive
can run again.
- Solid State Full Wave Power Bridge - Uses generously
rated power semiconductors for maximum reliability and long
life.
- Isolated 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
ammeter, speed potentiometer, and tachometer are not at line
potential. Complete system capability is also possible without
additional isolation accessories.
- Power Supplies - Each 2600RG contains and internal
115 VAC power supply to power the DC loop contractor and drive
logic relays. Internal ±24 VDC, ±15 VDC and a regulated ±10
VDC power supply are also included.
- Ammeter Output - Motor current can be indicated with
the simple addition of a remote meter.
- Field Economy - Insures longer life for wound field
DC motors. May be easily bypassed or time delayed to meet
specific application requirements.
- Double Break DC Armature Loop Contactor - Full rated
and fully sequenced contactor assures positive disconnect of
DC motor when the stop push button is pushed or whenever and
under-voltage condition occurs.
- Remote current Limit - Available by the simple
addition of a potentiometer or DC voltage input.
- Negative IR Compensation- Available by jumper
connection. Allows use of control in jumper applications.
- Current (torque) Regulator - 1% accuracy armature
current regulator allows the operator to control motor torque
instead of speed.
- Speed Regulator - 2% accuracy using armature voltage
feedback with IR compensation or 1% accuracy with tachometer
feedback. Regulation may be improved by selecting the proper
motor mounted tachometer.
- Separately Adjustable Linear Accel/Decel Control -
Two ranges: 0.2-4 seconds or 2-30 seconds.
- Rectilinear Phase Control - Improves performance at
low speed and near zero load.
- Inner Current Loop Regulator - Inherent high band
width capability for fast response.
- Quadrant Lockout - May be selected by jumper
programming to prevent forward or reverse motoring in certain
applications.
- AC Line Filter and Transient Voltage Suppression Network
- Eliminates interaction between other drives or AC equipment.
- Reactors. Snubber Networks - Prevents SCR DV/DT
failures due to line spikes and transients. Provide DI/DT
protection during SCR turn on and aids in SCR turn off during
SCR commutation, minimizing the effects of AC power notching.
- SCR 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 the notching or
incoming AC power line.
- Standard Adjustments - Max, speed, zero bias,
acceleration time, deceleration time, IR compensation, current
limit, jog speed, velocity stability, speed rate and current
stability.
- Jog at Preset Speed - Separately adjustable from zero
to plus or minus 30% of base speed.
- Dual Frequency Operation - Controls may be operated
from 50 to 60 Hz power supplies by simple jumper change.
- Exclusive Static Adjustable Current Limit - Allows
static setting of the desired current limit value without
applying DC power and without a connected output load whenever
the optional test meter in connected.
- Common Control Circuit Boards - 262-8000 and 8001
2600RG series controls utilize the same PC board regardless of
HP, voltage, frequency, or control mode.
- DC Overload (Armature) - Senses over-current
condition with inverse time shutdown.
- Field Loss Protection - Provides protection against
runaway due to loss of motor field by shutting down the drive.
- High Speed Current Limiting SCR Semiconductor Fuses -
Provide the utmost in fuse coordination and protection of the
SCR's and motor with positive circuit clearing on both AC and
DC faults.
- Instantaneous Over-current Protection - Senses
armature fault current quickly to protect both semiconductors
and motors against damaging current levels.
OPTIONS
- Test Meter - This modification consists of a digital
panel meter and multi-position selector switch. It provides
the capability to monitor nine critical drive parameters. The
test meter kit plugs into the regulator PC Board on the
2600RG. It is an ideal addition to the control as an aid in
troubleshooting and start-up.
- Ammeter Kit - The 2600RG control includes circuitry
to drive an external ammeter without the addition of an
ammeter shunt. This external meter can be calibrated in either
percent load or in amperes.
(Additional Options - many additional options are available to
meet specific drive application requirements including:
reversing, dynamic braking, process signal follower, specific
logic, auxiliary control, field weakening, and isolation
transformers - Contact
Microcon Technologies for details.)
SPECIFICATIONS
Service Conditions:
- Rated Voltage Input: 120 or 240 VAC (±10%) 1 Phase
- Rated Voltage Output: 90 or 180 VDC
- Frequency: 50/60Hz (±2Hz)
- Ambient Temperature: 0-40° C (32° F to 140° F)
- Altitude: Sea Level to 3300 Feet
- Efficiency: Power unit 98% or better depending on selected
rating. Drive system 82% or better depending on selected
rating.
- Load Inertia: Not more than motor inertia when referred to
motor shaft.
- Power Factor Corrected AC Line: Drive installation on power
factor corrected AC lines should be avoided where possible.
Performance:
- Control Speed Range: 20:1 for basic control. May be extended
to 200:1 by modification.
- Speed Regulations:
For a 95% load change:
Voltage Regulated: 2-5% of max. speed. Speed regulated 1% of
max. speed with any DC tachometer.
For all other variables:
Voltage Regulated: changes up to 15% of top speed can result
from temperature variations, voltage; and frequency
variations, and drift.
May be modified to achieve: 0.1% due to 95% load change and
0.15% due to all other variables.
Adjustments:
- Maximum Speed: 70 to 130% rated speed
- Acceleration Time: 0.2 to 30 sec.
- Deceleration Time: 0.2 to 30 sec.
- Jog Speed: 1 to 30% rated speed
- IR Compensation: 0 to 10% rated voltage
- Current Limit: 1 to 150% of selected range
Control Power:
- Voltage (Relay Logic): 115 VAC
- Spare Capacity: 5 VA
Input Signal Requirements:
- ±10 VDC at 1mA (nominal) for max output
Speed Potentiometer:
- 500 Ohms, 2 Watts
Field Data:
- Voltage: 100 VDC with 120 VAC input 200 VDC with 240 VAC
input
- Current: 3 amperes max.
|
