Isolated input, pulse-width modulated, adjustable speed drives for dc brush motors (43 pages)
Summary of Contents for Minarik MM31002A
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MM30000 Series Models: MM31002A MM31610A MM32002A SCR, Adjustable Speed Drives for DC Brush Motors...
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Minarik Corporation All rights reserved. No part of this manual may be reproduced or transmitted in any form without written permission from Minarik Corporation. The information and technical data in this manual are subject to change without notice. Minarik Corporation and its...
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Follow sound maintenance procedures. It is possible for a drive to run at full speed as a result of a component failure. Minarik strongly recommends the installation of a master switch in the main power input to stop the drive in an emergency.
Installation Mounting Warning Do not install, rewire, or remove this control with power applied. Doing so may cause fire or serious injury. Make sure you have read and understood the Safety Warnings before attempting installation. 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 to reach bare metal.
Installation Wiring Warning Do not install, remove, or rewire this equipment with power applied. Failure to heed this warning may result in fire, explosion, or serious injury. Circuit potentials are at 115 or 230 VAC above ground. To prevent the risk of injury or fatality, avoid direct contact with the printed circuit board or with circuit elements.
As a general rule, Minarik recommends shielding of all conductors. If it is not practical to shield power conductors, Minarik recommends shielding all logic-level leads. If shielding logic leads is not practical, the user should twist all logic leads with themselves to minimize induced noise.
Installation Speed adjust potentiometer connections Warning Be sure that the potentiometer tabs do not make contact with the potentiometer enclosure. Grounding the input will cause damage to the drive. Install the circular insulating disk between the mounting panel and the 10K ohm speed adjust potentiometer (see Figure 5). Mount the speed adjust potentiometer through a 0.38-inch (10 mm) hole with the hardware provided.
F1 and F2 Heat sinking All MM31600A series drives contain sufficient heat sinking in their basic configurations. MM31002A and MM32002A series drives require heat sink kit 223-0159 when the continuous armature current is above 5 ADC. Refer to Specifications (page 1) for operating limits when mounted on a heat sink.
Installation Line fusing Minarik drives require an external fuse for protection. Use fast acting fuses rated for 250 VAC or higher, and 150% of maximum motor armature current. Minarik Corporation offers two fuse kits: part number 050–0066 (1–5A Fuse Kit) and 050–0071 (5–15A Fuse Kit).
Do not connect this equipment with power applied. Failure to heed this directive may result in fire or serious injury. Do not apply 230 VAC line voltage to MM31002A or MM31600A series drives. This will result in severe damage to the drive, possible fire and serious injury.
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250 volts. Power connections Warning Do not apply 230 VAC line voltage to MM31002A or MM31600A series drives. This will result in severe damage to the drive, possible fire and serious injury. Connect the AC line power leads to terminals L1 and L2, or to a double-throw, single-pole master power switch (recommended).
Installation NOTES: 1. DO NOT CONNECT 230 VAC LINE VOLTAGE TO MM31002A SERIES DRIVES. 2. DO NOT ADD A LINE FUSE TO L2 UNLESS LINE VOLTAGE IS 230 VAC. 3. DO NOT CONNECT FIELD COILS IF USING A PERMANENT-MAGNET MOTOR. REFER TO TABLE 1 (PAGE 10) FOR ALTERNATE FIELD CONNECTIONS.
Make no connection to S3. A potentiometer can be used to scale the analog input voltage. An interface device, such as Minarik model PCM4, may be used to scale and isolate an analog input voltage. Figure 7. Voltage Follower Connection for MM31002A and...
(PCB) as shown in Figure 8 (page 18). Motor connections Minarik drives supply motor voltage from 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.
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Installation Power connections Warning Do not apply 230 VAC line voltage to MM31002A or MM31600A series drives. This will result in severe damage to the drive, possible fire and serious injury. Connect the AC line power leads to terminals L1 and L2, or to a double-throw, single-pole master power switch (recommended).
Installation NOTES: 1. DO NOT CONNECT FIELD COILS IF USING A PERMANENT-MAGNET MOTOR. REFER TO TABLE 1 (PAGE 10) FOR ALTERNATE FIELD CONNECTIONS. Figure 8. Power, Fuse and Motor Connections for MM31600A Series Drives...
Make no connection to S1 or S3. A potentiometer can be used to scale the analog input voltage. An interface device, such as Minarik model PCM4, may be used to scale and isolate an analog input voltage. Figure 9. Voltage Follower Connection for MM31600A...
Operation Warning Dangerous voltages exist on the drive when it is powered. BE ALERT. High voltages can cause serious or fatal injury. Before applying power • Verify that no conductive material is present on the printed circuit board. • Verify that the AC supply is properly balanced. Drive startup and shutdown 1.
Removing AC line power (both L1 and L2) is the only acceptable method for emergency stopping. For this reason, Minarik strongly recommends the installation of an emergency stop switch. The switch contacts should be rated at a minimum of 250 volts and...
Operation Line starting and stopping When AC line voltage is applied to the drive, the motor accelerates to the set speed. When AC line voltage is removed, the motor coasts to a stop. Line stopping (removing AC line voltage) is recommended for stopping in emergency situations only.
18 inches (46 cm). If shielded cable is used, ground only one end of the shield to earth ground. Do not ground both ends of the shield. MM31002A/MM32002A MM31600A Figure 11. Run/Decelerate to Minimum Speed Switch...
Operation Dynamic braking Warning 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. NOTE: For motors rated 1/17 horsepower and lower, a brake resistor is not necessary since the armature resistance is high enough to stop the motor without demagnetization.
BE ALERT. High voltages can cause serious or fatal injury. MM31002A, MM32002A and MM31600A Series drives have four user-adjustable trimpots. Each drive is factory calibrated to its maximum current rating. Readjust the calibration trimpot settings to accommodate lower current-rated motors.
Calibration MAXIMUM MINIMUM TORQUE REGULATION SPEED SPEED LIMIT (IR COMP) MM31002A AND MM32002A SERIES DRIVES MAXIMUM MINIMUM TORQUE REGULATION SPEED SPEED LIMIT (IR COMP) MM31600A SERIES DRIVES Figure 13. Calibration Trimpot Layout...
Calibration Calibration procedure Calibrate the drive using the following procedure: 1. Set the MIN SPD and MAX SPD trimpots to zero (full CCW). 2. Set the TORQUE trimpot to maximum (full CW). 3. Set the IR COMP trimpot to midrange (approximate 12 o’clock position).
Calibration 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. Set the speed adjust potentiometer or reference voltage to maximum.
Although TORQUE LIMIT is set to 120% of maximum drive current rating, continuous operation beyond that rating may damage the motor. If you intend to operate beyond the rating, contact your Minarik representative for assistance. The TORQUE setting determines the maximum torque for accelerating and driving the motor (Figure 14).
Application Notes Reversing with dynamic braking Always use dynamic braking when reversing the motor direction (Figure 15). Use a three-pole, three-position switch rated for at least the maximum DC armature voltage and maximum braking current. Wait for the motor to stop completely before switching it to either the forward or reverse direction.
Application Notes Reversing with a DLC600 DIGI-LOK controller DLC600 can be used in a reversing application. The controller must be inhibited while braking. Without the inhibit feature, the controller will continue to regulate, causing overshoot when the DIGI-LOK is switched back to the drive.
Application Notes Independent Adjustable Speeds Connect two speed adjust potentiometers with a single pole two position switch to select between two independent speeds shown in the forward direction (Figure 17). The parallel resistance of the potentiometers must be equal to 10K ohms. The speed adjust potentiometers can be mounted at two separate operating stations.
Application Notes Adjustable speeds using potentiometers in series Replace the speed adjust potentiometer with a single-pole, multi-position switch, and two or more potentiometers in series, with a total series resistance of 10K ohms. Figure 18 shows a connection for fixed high and low speed adjust potentiometers.
Application Notes Multiple fixed speeds Replace the speed adjust potentiometer with series resistors with a total series resistance of 10K ohms (Figure 19). Add a single pole, multi-position switch with the correct number of positions for the desired number of fixed speeds. Figure 19.
Application Notes RUN/JOG switch Using a RUN/JOG switch is recommended in applications where quick stopping is not needed and frequent jogging is required. Use a single pole, two position switch for the RUN/JOG switch, and a single pole, normally closed, momentary operated pushbutton for the JOG pushbutton.
Application Notes RUN/JOG option #2 In the second wiring option, connect the RUN/JOG switch and the JOG pushbutton as shown in Figure 21. When the RUN/JOG switch is set to JOG, the motor decelerates to minimum speed (minimum speed is determined by the MIN SPD trimpot setting).
Application Notes Leader-follower application In this application, use a PCM4 to monitor the speed of the leader motor (Figure 22). The PCM4 isolates the leader motor from the follower drive, and outputs a voltage proportional to the leader motor armature voltage. The follower drive uses this voltage reference to set the speed of the follower motor.
Application Notes Single speed potentiometer control of multiple drives Multiple drives can be controlled with a single speed adjust potentiometer using a PCM4 at the input of each drive to provide isolation (Figure 23). Optional ratio potentiometers can be used to scale the PCM4 output voltage, allowing independent control of each drive.
• Verify that there are no short circuits or grounded connections. • Check that the drive’s rated armature outputs are consistent with the motor ratings. For additional assistance, contact your local Minarik distributor, or the factory direct: (800) MINARIK (646-2745) (phone) or (800) 394-6334 (fax).
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“jams”. See page 30 for information on adjusting the TORQUE trimpot. 4. Field circuit is shorted. 4. Send in drive to Minarik repair department. Line fuse does not 1. Speed adjust 1. Increase speed adjust blow, but the motor...
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Troubleshooting Symptom Possible Suggested Causes Solutions Line fuse does not 3. Drive is overloaded. 3. Verify that the motor is blow, but the motor not jammed. Increase does not run (cont.) TORQUE setting (page 4. Drive is not receiving 4. Apply AC line voltage AC line voltage.
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Troubleshooting Symptom Possible Suggested Causes Solutions Motor will not reach 3. Motor is overloaded. 3. Check motor load. the desired speed Resize the motor and (cont.) drive if necessary. Motor pulsates or 1. IR COMP is set too 1. Adjust the IR COMP surges under load high.
Troubleshooting Replacement Parts Replacement parts are available from Minarik Corporation and its distributors for this drive series. Table 3. Replacement Parts Model No. Symbol Description Minarik® MM31002A C503 22 uF, 25 VDC Capacitor 011-0046 D501–503 D8020L Diode 071-0039 SCR501–502 S8020L High-power SCR 072-0043 R501 0.01 Ohm, 5W Resistor...
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Unconditional Warranty A. Warranty Minarik Corporation (referred to as "the Corporation") 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,...
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901 East Thompson Avenue Glendale, California 91201-2011 Tel: (800) MINARIK (646-2745) Fax: (800) 394-6334 www.minarikcorp.com Document Number 250-0101, Revision 2 Printed in the U.S.A – 6/01 $12.00 North America, $13.00 Outside North America...
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