Leeson M1740009.OO User manual

USER’S MANUAL
M1740009.OO
Pulse-Width Modulated,
Adjustable Speed Drives
for DC Brush Motors
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Copyright  1997 by
Leeson Corporation
All rights reserved. No part of this manual may be reproduced or transmitted in any
form without written permission from Leeson Corporation. The information and
technical data in this manual are subject to change without notice. Leeson
Corporation 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. Leeson Corporation 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.
Printed in the United States of America.
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mSafety Warnings
•Throughout this manual, this symbol mdenotes an important
safety message. Please read these sections very carefully
before performing any of the instructions contained in this
manual.
• 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. In order to stop the drive in an emergency,
please ensure that a master switch has been placed in the AC
power line.
•This drive is not 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.
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Contents
Specifications 1
Dimensions 2
Installation 3
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Line fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Speed adjust potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Quick-connect terminal block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Voltage follower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Operation 10
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Line starting and line stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Inhibit switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Dynamic braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Calibration 14
MIN SPD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
MAX SPD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
IR COMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
TORQUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
ii
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Application Notes 17
Multiple fixed speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Adjustable speeds using potentiometers in series . . . . . . . . . . . . . . . . . . .18
Independent adjustable speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
RUN/JOG switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Reversing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Troubleshooting 22
Block Diagrams 25
Limited Warranty inside back cover
iii
Contents
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Index of Illustrations
Fig. Description Page
1. Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2. Fuseholder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3. Speed Adjust Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4. Quick-Connect Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5. Drive Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
6. Voltage Follower Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
7. Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
8. Inhibit Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
9. Dynamic Brake Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
10. Typicqal TORQUE and IR COMP settings . . . . . . . . . . . . . . . . . . . . . . . . .16
11. Multiple Fixed Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
12. Adjustable Fixed Speeds Using Potentiometers In Series . . . . . . . . . . . . .18
13. Independent Adjustable Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
14. RUN/JOG Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
15. Reversing Circuit Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
16. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
17. Input Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
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Specifications
Model M1740009.OO
AC Line Voltage 115 VAC, ±10%, 50/60 Hz, single phase
Horsepower Range (with 130 VDC motors) 1/20 – 1/3 HP
Armature Voltage 0 – 130 VDC
Maximum Continuous Armature Current 2 ADC
Form Factor (at base speed) 1.05
Acceleration Time (with load) 1 second
Deceleration Time (with load) 2 seconds
Analog Input Voltage Range (isolated; S1 to S2) 0 – 5 VDC
Input Impedance (S1 to S2) > 100K ohms
Speed Regulation 1% of base speed or better
Ambient Temperature Range 10°C–40°C
Weight 0.6 lb
1
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2
Dimensions
Figure 1. M1740009.OO Dimensions
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3
Installation
Mounting
• Drive components are sensitive to electrostatic fields. Avoid
direct contact with the circuit board. Hold 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 heat sources. Operate the drive
within the specified ambient operating temperature range.
• Prevent loose connections by avoiding excessive vibration of
the drive.
• Mount drive with its board in either a horizontal or vertical
plane. Six 0.19 in. (5 mm) wide slots in the chassis accept #8
pan head screws. Fasten either the large base or the narrow
flange of the chassis to the subplate.
• The chassis must be earth grounded. Use a star washer beneath
the head of at least one of the mounting screws to penetrate the
anodized chassis surface and reach bare metal.
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Wiring
• Use 18 AWG wire for speed adjust potentiometer wiring. Use
16 AWG wire for motor and AC line voltage wiring.
• Twist logic wires (for speed adjust potentiometer and inhibit) to
avoid picking up unwanted electrical noise. Use shielded cable
if wires are longer than 18 in. (46 cm).
• Keep logic wires away from power carrying lines or sources
of electrical noise that can cause erratic operation. Never run
speed adjust potentiometer or inhibit wires in the same conduit
as the motor and AC line voltage wires.
• It may be necessary to earth ground the shielded cable. If noise
is produced by devices other than the drive, ground the shield at
the drive end. If noise is generated by a device on the drive,
ground the shield at the end away from the drive. Do not
ground both ends of the shield.
4Installation
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5
Installation
Line fuse
The M1740009.OO drive is protected by a 5 A, 250 V
AC line fuses. The fuse does not have to be resized as long as the
motor used is within the drive’s specified horsepower range.
The fuse is mounted in the fuseholder (see Figure 2). To
replace a blown fuse, use a screwdriver to turn the fuseholder
knob counterclockwise. Remove the blown fuse and replace with
a new fuse.
Figure 2. Fuseholder
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6Installation
Speed adjust potentiometer
Mount the speed adjust potentiometer through a 0.38 in. (10 mm)
hole with the hardware provided (Figure 3). Install the circular
insulating disk between the panel and the 10K ohm speed adjust
potentiometer. Twist the speed adjust potentiometer wire to avoid
picking up unwanted electrical noise. If potentiometer leads are
longer than 18 in. (457 mm), use shielded cable (see Wiring
section).
m Warning
Be sure that the potentiometer tabs do not make contact with the
potentiometer enclosure. Grounding the input will cause damage
to the drive.
Figure 3. Speed Adjust Potentiometer
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7
Installation
Quick-connect terminal block
The quick-connect terminal block has an 8-pin header block
and 8-screw terminal plug (Figure 4). To use the quick-connect
terminal block:
1. Carefully pull terminal plug from header block.
2. With a small flat-head screwdriver, turn terminal plug screw
counterclockwise to open wire clamp.
3. Insert stripped wire into the large opening in front of the plug.
4. Turn the terminal plug screw clockwise to clamp the wire.
5. Repeat steps 2–4 for each terminal until all connections are
made.
6. Insert plug into header until securely fastened.
Figure 4. Quick-Connect Terminal Block
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8Installation
Connections
ASSUMPTIONS: This drive series supplies motor voltage from
its A1 and A2 terminals. It is assumed throughout this manual
that when A1 is positive with respect to A2 , 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 to the motor from A1 and A2.
Figure 5. Drive Connections
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9
Installation
Voltage follower
Instead of using a speed adjust potentiometer, the drive may be
wired to follow a 0–5 VDC voltage signal that is isolated from
earth ground (Figure 6). Connect the signal input (+) to S2.
Connect the signal common (–) to S1. Make no connection to S3.
A potentiometer can be used to scale the analog input voltage.
Figure 6. Voltage Follower Connections
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Operation
Startup
Note: Before applying power, verify that no conductive material
is placed on the printed circuit board.
To start the drive:
1. Turn the speed adjust potentiometer full counterclockwise
(CCW). If the drive is following a voltage signal, set the
voltage signal to 0 VDC.
2. Apply power.
3. Slowly advance the speed adjust potentiometer clockwise
(CW). If the drive is following a voltage signal, slowly increase
the voltage signal. The motor will slowly accelerate as the
speed adjust potentiometer is turned CW, or the voltage signal
is increased. Increase the signal until the desired speed is
reached.
4. Remove power from the drive. The motor will coast to a stop.
If the motor or drive does not perform as described, disconnect
the AC line voltage immediately. Refer to the Troubleshooting
section, page 27, for further assistance.
10
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Diagnostic LEDs
This drive is equipped with two diagnostic LEDs: power status
(PWR) and current limit mode (CUR LIM). See Figure 7 for
LED location.
POWER (PWR): Green LED lights whenever AC line voltage
is applied to the drive.
CURRENT LIMIT (CUR LIM): Red LED lights whenever the
drive reaches current limit.
11
Operation
Line starting and stopping
Line starting and stopping (applying and removing AC line
voltage) is recommended for infrequent starting and stopping of a
drive only. 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.
Figure 7. Diagnostic LEDs
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12 Operation
Dynamic braking
Dynamic braking may be used to rapidly stop a motor
(Figure 9). For the RUN/BRAKE switch, use a double pole,
double throw switch rated for at least the maximum DC armature
voltage and maximum braking current.
Inhibit switch
An inhibit switch allows the motor to decelerate to zero speed
when the switch is closed. Connect a single pole, single throw
switch between H1 and H2 (see Figure 8). Close the switch to
decelerate the motor to zero speed. Open the switch to accelerate
the motor to set speed. An open-collector output rated for at least
10 mA (ICE) may also be used as an inhibit switch. Wire the
collector to H1, and the emitter to H2.
Figure 8. Inhibit Switch
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13
Operation
A 1 Ω, 1 W resistor is used as the dynamic brake resistor. For
motors rated 1/17 horsepower and lower, a dynamic brake resistor
is not necessary since the armature resistance is high enough to
stop the motor without demagnetization. In this case, replace the
dynamic brake resistor with 12 gauge wire.
mWarning
Wait for the motor to completely stop before switching it back
to RUN. This will prevent high armature currents from
damaging the motor or drive.
Figure 9. Dynamic Brake Connection
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14
Calibration
Each drive is factory calibrated to its maximum horsepower
rating. Readjust the calibration trimpot settings to accommodate
lower horsepower 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.
MINIMUM SPEED (MIN SPD)
The MIN SPD setting determines the motor speed when the speed
adjust potentiometer is turned full CCW. It is factory set for zero
speed.
To calibrate turn the speed adjust potentiometer full CCW. Adjust
the MIN SPD trimpot until the motor has stopped, or is running at
the desired minimum speed.
MAXIMUM SPEED (MAX SPD)
The MAX SPD setting determines the motor speed when the
speed adjust potentiometer is turned full CW. It is factory set for
maximum rated speed.
To calibrate, set the MAX SPD trimpot full CCW. Turn the speed
adjust potentiometer full CW. Adjust the MAX SPD trimpot until
the desired maximum motor speed is reached.
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