250 0226

250 0226
RG25U & RG51UA
SCR, ADJUSTABLE SPEED
REGENERATIVE DRIVES FOR
DC BRUSH MOTORS
Operation Manual
RGSeries
Copyright  2004 by
Minarik Drives
All rights reserved. No part of this manual may be reproduced or transmitted in
any form without written permission from Minarik Drives. The information and
technical data in this manual are subject to change without notice. Minarik Drives
and its Divisions make no warranty of any kind with respect to this material,
including, but not limited to, the implied warranties of its merchantability and
fitness for a given purpose. Minarik Drives and its Divisions assume no
responsibility for any errors that may appear in this manual and make no
commitment to update or to keep current the information in this manual. kc0304
Printed in the United States of America.
 Safety Warnings
SHOCK
HAZARD
AVOID
HEAT
KEE
DR
OID
ATION
• This symbol  denotes an important safety tip or warning.
Please read these sections carefully prior to performing any of
the instructions contained in that section.
• Have a qualified electrical maintenance technician install, adjust
and service this equipment. Follow the National Electrical Code
and all other applicable electrical and safety codes, including the
provisions of the Occupational Safety and Health Act (OSHA),
when installing equipment.
• Reduce the chance of an electrical fire, shock, or explosion by
proper grounding, over-current protection, thermal protection,
and enclosure. Follow sound maintenance procedures.
• It is possible for a drive to run at full speed as a result of a
component failure. Please ensure that a master switch has been
placed in the AC line to stop the drive in an emergency.
• This drive is isolated from earth ground. Circuit potentials are at
115 VAC above earth ground. Avoid direct contact with the
printed circuit board or with circuit elements to prevent the risk of
serious injury or fatality. Use a non-metallic screwdriver for
adjusting the calibration trimpots.
ii
Contents
Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
RG51UA ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Regenerative Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Mounting drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Line fusing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Screw terminal block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Spade lugs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Speed adjust potentiometer installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
RG25U Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
AC line and motor connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Speed adjust potentiometer connections
. . . . . . . . . . . . . . . . . . . . . . . . . . .11
RG51UA Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
AC line, motor and field connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Speed adjust potentiometer connections . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Before applying power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Startup
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Line starting and line stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Automatic restart upon power restoration . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Regenerative deceleration (RG25U)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Regenerative deceleration (R51UA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Calibration
MAX SPD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
iii
FWD TQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
REV TQ
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
IR COMP
DB
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
RG25U/RG51UA Connections to other Minarik devices . . . . . . . . . . . . . . . .23
Optional speed adjust potentiometer connections . . . . . . . . . . . . . . . . . . . . .24
Before troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Unconditional Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . .inside back cover
Tables
Table 1. Recommended Line Fuse Sizes
Table 2. Replacement Parts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Table 3. AC Line Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Table 4. Armature Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
iv
Illustrations
Figure 1. RG25U Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Figure 2. RG51UA Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Figure 3. Four Quadrant Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 4. Screw Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 5. Speed Adjust Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Figure 6. RG25U AC Line and Motor Connections . . . . . . . . . . . . . . . . . . . . . . .10
Figure 7. RG25U Speed Adjust Potentiometer Connections . . . . . . . . . . . . . . . .11
Figure 8. RG51UA AC Line, Motor and Field Connections . . . . . . . . . . . . . . . . .12
Figure 9. RG51UA Speed Adjust Potentiometer Connections . . . . . . . . . . . . . .13
Figure 10. RG25U/RG51UA Series Block Diagram . . . . . . . . . . . . . . . . . . . . . .14
Figure 11. RG25U Regenerative Deceleration Switch Connection . . . . . . . . . . .17
Figure 12. RG51UA Regenerative Deceleration Switch Connection . . . . . . . . . .18
Figure 13. Typical FWD TQ, REV TQ, and IR COMP Settings
(actual settings may vary with each application) . . . . . . . . . . . . . . . .21
Figure 14. Deadband Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 15. RG25U/RG51UA Connection to DLC600 Control
and PCM4 Signal Isolator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 16. Forward-Reverse Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 17. Forward-Stop-Reverse Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Figure 18. Independent Adjustable Speeds Forward Direction . . . . . . . . . . . . . .26
Figure 19. Independent Forward and Reverse Speeds . . . . . . . . . . . . . . . . . . . .27
Figure 20. Independent Forward and Reverse Speeds with a
Forward-Stop-Reverse Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
1
Specifications
Max.
Armature
Current
(Amps DC)
5.0
5.0
Model
RG25U
RG51UA
AC Line Voltage
HP Range
with 115 VAC
Applied
1/8–1/2
1/8–1/2
115 VAC, ±10%, 50/60 Hz, single phase
Peak Current Limit
9 ADC
Maximum Armature Voltage Range at 115 VAC Input
Form Factor
60–75 VDC
1.77 at base speed
Acceleration Time (with load)
1 second
Deceleration Time (with load)
1 second
Speed Adjust Potentiometer
Analog Input Voltage Range (isolated; S1 to S2)
Input Impedance (S0 to S2) RG25U
RG51UA
Load Regulation at Base Speed
Speed Range
50KΩ
0–10 VDC
200KΩ
100KΩ
3%
50:1
Weight - RG25U
.50 lb (227 grams)
Weight - RG51UA
.75 lb (340 grams)
Ambient Temperature Range
Vibration
10°C–55°C
0.5g max (0 – 50 Hz)
0.1g max (above 50 Hz)
RG51UA ONLY
Field Voltage (F1 to F2)
100 VDC
Maximum Field Current
1 ADC
2
Dimensions
Figure 1. RG25U Dimensions
Dimensions
Figure 2. RG51UA Dimensions
3
4
Regenerative Drives
Most non-regenerative, variable speed, DC drives control current
flow to a motor in one direction. The direction of current flow is the
same direction as the motor rotation.
Non-regenerative drives operate in Quadrant 1, and also in
Quadrant 3 if the drive is reversible (Figure 3). Motors must stop
before reversing direction. Unless dynamic braking is used, nonregenerative drives cannot oppose an overhauling load, and cannot
decelerate a load faster than coasting to a lower speed.
Regenerative drives operate in two additional quadrants: Quadrant
2 and Quadrant 4. In these quadrants, motor torque is in the
opposite direction of motor rotation.
Regenerative drives can reverse a motor without contactors,
switches, brake resistors, and inhibit plugs. They can also control
an overhauling load and decelerate a load faster than it would take
to coast to a lower speed.
The RG25U and the RG51UA are regenerative drives. They are
uncased chassis model drives and designed to be installed in
original equipment. The drives are the same electrically. The
physical layout and size of these drives are different (see
Dimensions section). The RG51UA includes a field supply for shunt
wound motors.
The RG25U and the RG51UA are half wave rectified DC
regenerative drives. Therefore the maximum armature voltage of
these drives is 75 VDC. This means that a 90 VDC motor will only
run at about 83% of rated nameplate speed.
The form factor of the RG25U and the RG51UA is 1.77. This will
cause a higher-than-normal heating in the motor armature. To
prevent a shorter-than-normal motor life, Minarik recommends that
Regenerative Drives
the horsepower rating of the motor for a given application be at
least 50% greater than the required horsepower.
Quadrant II
Quadrant I
Quadrant III
Quadrant IV
MOTOR
ROTATION
MOTOR
TORQUE
NOTE: ARROWS IN SAME DIRECTION = MOTOR ACTION
ARROWS IN OPPOSITE DIRECTION = REGENERATIVE ACTION
Figure 3. Four Quadrant Operation
5
6
Installation
ASSUMPTIONS: Minarik drives supply motor voltage from A1 (or
A+) and A2 (or A–) terminals. It is assumed throughout this manual
that, when A1 (or A+) is positive with respect to A2 (or A–), the
motor will rotate clockwise (CW) while looking at the output shaft
protruding from the front of the motor. If this is opposite of the
desired rotation, simply reverse the wiring of A1 (or A+) and A2 (or
A–) with each other.
Mounting drives
Drive components are sensitive to electrostatic fields. Avoid contact
with the circuit board directly. Hold the drive by the chassis only.
Protect the drive from dirt, moisture, and accidental contact.
Provide sufficient room for access to the terminal block and
calibration trimpots.
Mount the drive away from other heat sources. Operate
the drive within the specified ambient operating temperature range.
Prevent loose connections by avoiding excessive vibration
of the drive.
Mount the drive with its board in either a horizontal or
vertical plane. The RG25U has six 0.188 inch (4.8 mm) wide slots
in the chassis that accept #8 pan head screws. Fasten either the
large base or the narrow flange of the chassis to the subplate. The
RG51UA has four 0.188 inch (4.8mm) wide slots in the base of the
chassis that accept #8 pan head screws.
The chassis must be earth grounded for noise suppression. To
Installation
7
ground the RG51UA chassis, connect earth ground to the GND
terminal on the seven position terminal block.
To ground the RG25U use a star washer beneath the head of at
least one of the mounting screws to penetrate the anodized chassis
surface and to reach bare metal.
Line fusing
The National Electrical Code requires the installation of a circuit
breaker or fuse on the incoming AC line voltage. Use a circuit
breaker or fast acting fuse rated for 8 amps or less. With an
115VAC line voltage fuse the hot leg of the AC line that connects to
L1 and leave L2 unfused. Use 250VAC fuses. See Table 1 for
recommended line fuse sizes.
Table 1. Recommended Line Fuse Sizes
90 VDC
Motor
Maximum Armature
HPCurrent
Fuse
Rating
1/8
1.5
3
1/4
2.6
5
1/3
3.5
8
1/2
5.0
8
8
Installation
Screw terminal block
Connections to RG51UA drives are made to a screw terminal block
(Figure 4). Using a screwdriver, turn the terminal block screw
counter-clockwise to open the wire clamp. Turn the terminal block
screw clockwise to clamp the wire.
TERMINAL
BLOCK
SCREW
WIRE
CLAMP
Figure 4. Screw Terminal Block
Spade lugs
Connections to the RG25U are made to .25 inch (.6 mm) spade
lugs on the drive.
Installation
9
Speed adjust potentiometer installation
Install the circular insulating disk between the panel and the 50K
ohm speed adjust potentiometer. Mount the speed adjust
potentiometer through a 0.38 inch (0.96 cm) hole with the hardware
provided (Figure 5). Twist the speed adjust potentiometer wire to
avoid drawing unwanted electrical noise. If potentiometer leads are
longer than 18 inches (46 cm.), use shielded cable.
 Warning
Be sure that the potentiometer tabs do not make contact with
the potentiometer enclosure. Grounding the input will cause
damage to the drive.
MOUNT THROUGH A 0.38 IN. (10 MM) HOLE
CW
WIPER
W
NUT
STAR
WASHER
SPEED ADJUST
POTENTIOMETER
INSULATING DISK
PANEL
Figure 5. Speed Adjust Potentiometer
10
Installation
RG25U Connections
AC line and motor connections
Use 14 AWG or 16 AWG standard wire for connecting the
line and the armature. When connecting the line, standards require
installation of a fuse. See page 7 for the details on fuse sizing.
The RG25UA does not have a field output.
Figure 6. RG25U AC Line and Motor Connections
Installation
11
Speed adjust potentiometer connections
The motor can operate in one direction (unidirectional) or in two
directions (bidirectional) depending on how the speed adjust
potentiometer is connected to the drive.
Connect the speed adjust potentiometer as shown in
Figure 7(a) for speed control in one direction.
Connect the speed adjust potentiometer as shown in
Figure 7(b) for speed control in two directions. The motor does not
rotate when the wiper is in the center position. Turning the wiper
CW from the center position causes the motor to rotate in one
direction, while turning the wiper CCW from the center position
causes the motor to rotate in the opposite direction.
Refer to the Application Notes section (page 23) for additional
speed adjust potentiometer connections.
a) Unidirectional Operation
b) Bidirectional Operation
Figure 7. RG25U Speed Adjust Potentiometer Connections
12
Installation
RG51UA Connections
AC line, motor and field connections
The motor and AC line connections to the RG51UA are made to
the 7 screw terminal block. Use 14 AWG or 16 AWG standard wire
for connecting the line and the armature. Strip the wire insulation
0.25 inches (6 mm).
The field output is for shunt wound motors only. Do not make any
connections to F1 and F2 when using a permanent magnet
motor.
The field output connection for the RG51UA is made to the
7 screw terminal block. Use 16 or 18 AWG wire to connect the field
output to a shunt wound motor. See Figure 8 for RG51UA
connections.
Figure 8. RG51UA AC Line, Motor and Field Connections
Installation
13
Speed adjust potentiometer connections
The motor can operate in one direction (unidirectional) or in two
directions (bidirectional) depending on how the speed adjust
potentiometer is connected to the drive. Speed adjust
potentiometer connections are made to the 5 screw terminal block.
Connect the speed adjust potentiometer as shown in
Figure 9(a) for speed control in one direction.
Connect the speed adjust potentiometer as shown in
Figure 9(b) for speed control in two directions. The motor does not
rotate when the wiper is in the center position. Turning the wiper
CW from the center position causes the motor to rotate in one
direction, while turning the wiper CCW from the center position
causes the motor to rotate in the opposite direction.
Refer to the Application Notes section for additional speed adjust
potentiometer connections.
a) Unidirectional Operation
b) Bidirectional Operation
Figure 9. RG51UA Speed Adjust Potentiometer Connections
14
Block Diagram
Figure 10. RG25U/RG51UA Series Block Diagram
Block Diagram
15
16
Operation
Before applying power
1. Check connections before applying AC line voltage to the drive.
2. Check that no conductive material is present on the printed
circuit board.
Startup
1. Set the speed adjust potentiometer for zero speed. This may be
the center position of the potentiometer if the drive is wired for
bidirectional operation or fully counterclockwise if the drive is
wired for unidirectional operation.
2. Apply AC line voltage.
3. Slowly advance the speed adjust potentiometer clockwise (CW).
The motor slowly accelerates as the potentiometer is turned CW.
Continue until the desired speed is reached. If the potentiometer
is wired for bidirectional control, advance the potentiometer in
either direction off center and the motor will accelerate as the
potentiometer is turned.
4. Remove AC line voltage from the drive to coast the motor
to a stop.
Line starting and line stopping
Line starting and line stopping (applying and removing AC line
voltage) is not recommended with regenerative drives, except in
emergency conditions: line starting and stopping defeats the 4quadrant control. When AC line voltage is applied to the drive, the
motor accelerates to the speed set by the speed adjust
potentiometer. When AC line voltage is removed, the motor coasts
to a stop.
Operation
17
Automatic restart upon power restoration
All drives automatically run to set speed when power is applied.
Wiring a latching relay into the AC line is one way
to prevent automatic restarting following a power outage.
Regenerative deceleration (RG25U)
Short terminals S0 and RB to regeneratively decelerate a motor to
a stop (Figure 11). Because there is no deceleration adjustment on
this drive, the speed at which the deceleration of the motor takes
place will be completely dependent upon load inertia, friction, and
the settings of the FWD TQ and REV TQ trimpots. This is the
fastest stopping action available.
Figure 11. RG25U Regenerative Deceleration Switch
Connection
18
Operation
Regenerative deceleration (R51UA)
Short terminals S0 and T0 to regeneratively decelerate the motor to
a stop (Figure 12). Because there is no deceleration adjustment on
this drive, the speed at which the deceleration of the motor takes
place will be completely dependent upon load inertia, friction and
the settings of the FWD TQ and REV TQ trimpots. This is the
fastest stopping action available.
Figure 12. RG51UA Regenerative Deceleration Switch Connection
 Warning
For frequent starts and stops, use regenerative deceleration (shorting
RB and S0 on RG25U, or shorting S0 and T0 on RG51UA). Do not
use this method for emergency stopping. They may not stop a drive
that is malfunctioning. Removing AC line power (both L1 and L2) is
the only acceptable metod for emergency stopping.
Frequent regenerative deceleration, regenerative braking produces
high torque. This may cause damage to motors, especially
gearmotors that are not properly sized for the application.
19
Calibration
Each drive is factory calibrated to its maximum horsepower rating.
Readjust the calibration trimpot settings to accommodate lower
current rated motors.
All adjustments increase with CW rotation, and decrease with CCW
rotation. Use a non-metallic screwdriver for calibration. Each
trimpot is identified on the printed circuit board.
MAX SPD
The MAX SPD setting determines the maximum motor speed when
the speed adjust potentiometer is turned full CW. It is factory set for
maximum rated motor speed.
To calibrate, set the speed adjust potentiometer full CW. Adjust the
MAX SPD trimpot until the motor turns at the desired maximum
speed.
FWD TQ
The FWD TQ setting determines the maximum torque for
accelerating and driving the motor in the forward direction. It also
sets the maximum torque for decelerating the motor in the reverse
direction. FWD TQ is factory set at 120% of rated motor current.
20
Calibration
If the time it takes to accelerate a load is too long due to the
forward torque setting, increase the forward torque setting to 130%
of rated motor current. The decision to change the forward torque
setting must be made after considering the gearbox and drivetrain
ratings, duty cycle, and motor characteristics. See Figure 13 for
typical FWD TQ settings.
REV TQ
The REV TQ setting determines the maximum torque for
accelerating and driving the motor in the reverse direction. It also
sets the maximum torque for decelerating in the forward direction.
REV TQ is factory set at 120% of rated motor current.
If the time it takes to accelerate a load is too long due to the
reverse torque setting, increase the reverse torque setting to 130%
of rated motor current. The decision to change the reverse torque
setting must be made after considering the gearbox and drivetrain
ratings, duty cycle, and motor characteristics. See Figure 13 for
typical REV TQ settings.
IR COMP
The IR COMP setting determines the degree to which motor speed
is held constant as the motor load changes. It is factory set for
optimum motor regulation.
Recalibrate the IR COMP setting when using a lower current rated
motor. See Figure 13 for typical IR COMP settings, or recalibrate
using the following procedure: If the motor does not maintain set
speed as the load changes, gradually rotate the IR COMP trimpot
CW. If the motor oscillates (overcompensation), the IR COMP
trimpot may be set too high (CW). Turn the IR COMP trimpot CCW
until the motor load stabilizes.
Calibration
21
RG25U
RG51UA
Figure 13. Typical FWD TQ, REV TQ, and IR COMP Settings
(actual settings may vary with each application)
22
Calibration
DB
The deadband trimmer potentiometer determines the time
that will elapse between the application of current in one direction
before current is applied in the opposite direction.
The deadband trimmer potentiometer affects the
resistance that a motor has to changes in shaft position at
zero speed. It does this by applying AC voltage to the motor
armature.
Deadband is factory calibrated to approximately the
3 o’clock position for 60 Hz AC line operation. Recalibrate
the deadband to the 9 o’clock position for 50 Hz AC line operation.
See Figure 14 for recommended deadband settings.
Figure 14. Deadband Settings
23
Application Notes
RG25U/RG51UA Connections to other Minarik devices
Figure 15. RG25U/RG51UA Connection to DLC600 Control
and PCM4 Signal Isolator
24
Application Notes
Optional speed adjust potentiometer connections
Use a single pole, two position switch with a single speed adjust
potentiometer to plug reverse the motor (Figure 16). The MIN SPD
setting is in effect for either direction.
Figure 16. Forward-Reverse Switch
Application Notes
25
Use a single pole, three position switch with a single speed adjust
potentiometer to stop a motor between reversals
(Figure 17). Set the switch to the center position to decelerate the
motor to a stop.
Figure 17. Forward-Stop-Reverse Switch
26
Application Notes
Connect two speed adjust potentiometers with a single pole two
position switch to select between two independent speeds shown
in the forward direction (Figure 18). The speed adjust
potentiometers can be mounted at two separate operating stations.
Figure 18. Independent Adjustable Speeds Forward Direction
Application Notes
Connect two speed adjust potentiometers as shown in
Figure 19 to select between independent forward and
reverse speeds.
Figure 19. Independent Forward and Reverse Speeds
27
28
Application Notes
Use a single pole, three position switch to stop the motor when the
switch is in the center position (Figure 20).
Figure 20. Independent Forward and Reverse Speeds with a
Forward-Stop-Reverse Switch
29
Troubleshooting
 Warning
Dangerous voltages exist on the drive when it is powered. When
possible, disconnect the AC line voltage from the drive while
troubleshooting. Be ALERT! High voltages can cause serious or fatal
injury.
Before troubleshooting
Perform the following steps before starting any procedure in this
section:
• Disconnect AC line voltage from the drive.
• Check the drive closely for damaged components.
• Check that no conductive or other foreign material has become
lodged on the printed circuit board.
• Verify that every connection is correct and in good condition.
• Verify that there are no short circuits or grounded connections.
• Check that the drive’s rated armature and field outputs are
consistent with the motor ratings open.
For additional assistance, contact your local Minarik Distributor, or
the factory direct:
PHONE 1-800-MINARIK (646-2745); FAX 1-800-394-6334
30
Troubleshooting
Motor does not run
1. Check for blown fuses or tripped circuit breaker.
2. Verify that the speed adjust potentiometer is not set to zero
speed position.
3. Verify that the drive is receiving AC line voltage.
4. Check that the drive is not in current limit. It may be necessary
to increase the FWD TQ and REV TQ setting if it is set to a
value lower than the current rating of the motor.
Fuses or circuit breaker blows
1. Check all wiring for shorts, grounds, or misconnections.
2. Check that the drive is configured to match the motor rating.
3. Check that the motor is not jammed or restricted from
movement.
Motor runs too fast at the maximum speed setting
1. Check that the MAX SPD setting is not set too high.
2. Check that the field output connections (RG51UA only) are
secure if you are using a shunt wound motor.
Motor will not stop when the speed adjust potentiometer is set
to zero speed
Turn the deadband trimpot CCW until the motor stops.
Motor runs in the opposite direction and speed adjust
potentiometer is connected for unidirectional operation
1. Remove AC line voltage.
2. Reverse connections to the motor armature.
Motor slows under load
1. Check that the drive has been correctly calibrated for the motor.
2. Check that the motor is not overloaded.
3. Readjust the IR COMP slightly CW until motor runs at proper
speed.
Troubleshooting
Motor is unstable under load
Readjust the IR COMP setting slightly CCW until motor speed is
stabilized.
Motor only runs at full speed
1. Check if the speed adjust potentiometer is open.
2. Check if the connections to for the speed potentiometer are
open.
31
32
Replacement Parts
Replacement parts are available form Minarik Corporation and
its distributors for this drive series.
Table 2. Replacement Parts
Model No.
RG51UA
Model No.
RG25U
Symbol
R501
SCR501-502
T505
Symbol
R501
SCR501-502
T505
Description
0.05W, 7 W Resistor
800 V, 25 A SCR
Transformer
50KW Potentiometer Kit
Chassis
7 Screw Terminal Block
5 Screw Terminal Block
Description
0.05W, 10W Resistor
800 V, 25 A SCR
Transformer
50KW Potentiometer Kit
Chassis
Minarik® P/N
032-0031
072-0042
230-0004
202-0005
223-0188
160-0019
160-0060
Minarik® P/N
032-0132
072-0042
230-0004
202-0067
222-0079
33
Certificate of Compliance
Minarik Corporation hereby certifies that its RG51UA drive has
been approved to bear the “CE” mark provided the conditions of
approval have been met by the end user.
The RG51UA has been tested to the following test specifications:
EN55011:1991 (emissions), and
EN50082-1:1992 (immunity)
Compliance allows the RG51UA to bear the CE mark.
The end user, as described herein, falls into one of two
categories:
1. The Consumer will deploy a stand-alone unit as an
integral, yet external, portion of the machine being
operated.
2. The Original Equipment Manufacturer (OEM) will
implement the product as a component of the machine
being manufactured.
34
Certificate of Compliance
AC Line Filters
In addition to EMI/RFI safeguards inherent in the RG51UA
design, external filtering is required.
Minarik requires the Corcom® AC line filters listed in Table 3.
Use model 5VR1 with drives rated for 3 ADC or below, and
model 20VV1 with drives rated for 10 ADC or below.
Table 3. AC Line Filters
Corcom®
Model Number
Rated Current
Inductance
Capacitance
Line to Line
Line to Ground
Discharge Resistor
5VR1
5A
1.032 mH
20VV1
20 A
0.88 mH
0.303 mF
0.011 mF
680 KW
0.303 mF
0.011 mF
680 KW
Wire the AC line filter within 0.25 meters of the drive. The ground
connection from the filter must be wired to solid earth ground
(resistance less than 500 ohms), not machine ground. This is very
important!
If the end-user is using a CE-approved motor, the correct filter
from Table 3 is all that is necessary to meet the EMC directives
listed herein.
Certificate of Compliance
35
Armature Filters
If the end-user is not using a CE-approved motor, a second filter
on the armature must be deployed. See Table 4 for
recommended armature filters. Use model CE04RG with drives
rated for 3 ADC or below, and model CE10RG with drives rated
for 10 ADC or below.
Table 4. Armature Filters
Minarik Model Number
Rated Current
Inductance
Capacitance (C1 and C2)
Discharge Resistor
CE04RG
4A
CE10RG
10 A
1200 mH
0.1 mF @ 400W VDC
680KW
Wire the armature filter to the DC output of the drive, as close to
the drive as possible. The ground connection from the filter must
be wired to solid earth ground (resistance less than 500 ohms);
not machine ground. This is very important!
The end user must use the filtration listed in this addendum to
comply with CE. The OEM may choose to provide alternative
filtering that encompasses the Minarik drive and other
electronics within the same panel.The OEM has this liberty
because CE is a machinery directive.
36
Certificate of Compliance
Whether or not every component in the OEM’s machinery meets
CE, the OEM must still submit his machine for CE approval.
Thus, no component must necessarily meet CE within the
machine, as long as the OEM takes the necessary steps to
guarantee the machine does meet CE. By the same token, even
if every component in the OEM’s machine does meet CE, the
machine will not necessarily meet CE as a machine.
Using CE-approved wiring practices (like proper shielding) and
the filters should assure the drive will meet EN55014 (1993
emissions standard) and EN50082-1 (1992 immunity standard).
Unconditional Warranty
A. Warranty
Minarik Drives warrants that its products will be free from defects in workmanship and
material for twelve (12) months or 3,000 hours, whichever comes first, from date of
manufacture thereof. Within this warranty period, Minarik Drives will repair or replace,
at its sole discretion, such products that are returned to Minarik Drives, 14300 De La
Tour Drive, South Beloit, IL 61080, USA.
This warranty applies only to standard catalog products, and does not apply to
specials. Any returns for special controls will be evaluated on a case-by-case basis.
Minarik Drives is not responsible for removal, installation, or any other incidental
expenses incurred in shipping the product to and from the repair point.
B. Disclaimer
The provisions of Paragraph A are Minarik Drives sole obligation and exclude all other
warranties of merchantability for use, express or implied. Minarik Drives further
disclaims any responsibility whatsoever to the customer or to any other person for
injury to the person or damage or loss of property of value caused by any product that
has been subject to misuse, negligence, or accident, or misapplied or modified by
unauthorized persons or improperly installed.
C. Limitations of Liability
In the event of any claim for breach of any of Minarik Drives obligations, whether
express or implied, and particularly of any other claim or breech of warranty contained
in Paragraph A, or of any other warranties, express or implied, or claim of liability that
might, despite Paragraph B, be decided against Minarik Drives by lawful authority,
Minarik Drives shall under no circumstances be liable for any consequential damages,
losses, or expense arising in connection with the use of, or inability to use, Minarik
Drives product for any purpose whatsoever.
An adjustment made under warranty does not void the warranty, nor does it imply an
extension of the original 12-month warranty period. Products serviced and/or parts
replaced on a no-charge basis during the warranty period carry the unexpired portion
of the original warranty only.
If for any reason any of the foregoing provisions shall be ineffective, Minarik Drives
liability for damages arising out of its manufacture or sale of equipment, or use thereof,
whether such liability is based on warranty, contract, negligence, strict liability in tort,
or otherwise, shall not in any event exceed the full purchase price of such equipment.
Any action against Minarik Drives based upon any liability or obligation arising
hereunder or under any law applicable to the sale of equipment or the use thereof,
must be commenced within one year after the cause of such action arises.
MINARIK DRIVES
14300 De La Tour Drive
South Beloit, IL 61080
Phone: (800) MINARIK or (815) 624-5959
Fax: (815) 624-6960
www.minarikdrives.com
Document Number 250-0226, Rev. 3
Printed in the U.S.A – 03/04
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement