Scr, adjustable speed, regenerative drives
for dc brush motors (64 pages)
Summary of Contents for Minarik MMRG30U
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M MRG S ER I ES USER MANUAL M M RG30U M M RG30U - PC M M M RG31U M M RG31U - PC M M M RG40U M M RG40U - PC M w w w . m i n a r i k d r i v e s . c o m...
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No part of this document may be reproduced or transmitted in any form without written permission from Minarik Drives. The information and technical data in this document are subject to change without notice. Minarik Drives makes 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.
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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 Drives strongly recommends the installation of a master switch in the main power input to stop WARNING! the drive in an emergency.
MMRG Series Section 1. 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 Quadrant II Quadrant I operate in Quadrant I, Quadrant III Quadrant IV...
Armature Model Current (ADC) Range (VDC) Current (ADC) HP Range MMRG31U 0 - 90 1/20 - 1/4 MMRG31U-PCM MMRG30U 0 - 90 10.0 1/8 - 1 MMRG30U-PCM MMRG40U 0 -180 10.0 1/4 - 2 MMRG40U-PCM Heat sink kit part number 223-0159 must be used when the continuous current output is over 5 amps.
Models MMRG30U, MMRG30U-PCM, MMRG40U, and MMRG40U-PCM require an additional heat sink when the continuous armature current is above 5 amps. Use Minarik Drives heat sink kit part number 223- 0159. All other chassis drives have sufficient heat sinking in their basic configuration.
MMRG Series Mounting • Drive components are sensitive to electrostatic discharge. Avoid direct contact with the circuit board. Hold the drive by the heat sink only. • Protect the drive from dirt, moisture, and accidental contact. • Provide sufficient room for access to the terminals and calibration trim pots.
MMRG Series Speed Adjust Potentiometer Be sure that the potentiometer tabs do not make contact with the potentiometer’s body. Grounding the input will cause damage to the drive. WARNING! If using a remote potentiometer with a chassis drive, mount the speed adjust potentiometer through a 0.38 in.
MMRG Series Wiring Do not install, rewire, or remove this control with input power applied. Failure to heed this warning may result in fire, explosion, or serious injury. WARNING! 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.
WARNING! As a general rule, Minarik Drives recommends shielding of all conductors. If it is not practical to shield power conductors, it is recommended to shield all logic-level leads. If shielding of all logic-level leads is not practical, the user should twist all logic leads with themselves to minimize induced noise.
90 VDC 180 VDC Maximum DC AC Line Motor Motor Armature Current Fuse Size Horsepower Horsepower (amps) (amps) 1/20 1/10 1/15 1 1/2 Minarik Drives offers fuse kits. See Section 9: Accessories and Replacement Parts for fuse kit part numbers.
200% of motor nameplate current and 250 volts. Power Input Connect the AC line power leads to terminals L1 and L2. Minarik Drives recommends the use of a single-throw, double-pole master power switch. The switch should be rated at a minimum of 250 volts and 200% of motor current.
T501 T502 MOTOR FUSE R503 DC VOLTAGE Add fuse to L2 with 230 VAC input only. 115 VAC 90 VDC MOTOR MMRG30U, MMRG30U-PCM MMRG30U, MMRG30U-PCM MMRG31U, MMRG31U-PCM MMRG31U, MMRG31U-PCM 230 VAC 180 VDC MOTOR MMRG40U MMRG40U, MMRG40U-PCM Master Power Switch...
MMRG Series Speed Adjust Potentiometer Use a 10K ohm, 1/4 W potentiometer for speed control. The motor can operate in one direction (unidirectional) or two directions (bidirectional) depending on how the speed adjust potentiometer is connected to the drive. For unidirectional operation in the foward direction, connect the speed adjust potentiometer as shown in Figure 7(a).
(Figure 5). Connect the signal common (–) S0. Connect the signal input (+) to S2. A potentiometer can be used to scale the analog input voltage. An interface device, such as Minarik Drives model PCM4, may be used to scale and isolate an analog input voltage.
MMRG Series Analog Input Signal (MMRG-PCM models) Instead of using a speed adjust potentiometer, the drive may be wired to follow an analog input voltage signal that is isolated or non-isolated (Figure 5). Connect the signal common (–) to terminal COM. Connect the signal input (+) to terminal POS.
MMRG Series +15 and -15 Do not short the +15 and -15 terminals for any reason. Shorting these terminals will damage the drive. WARNING! MMRG series drives can supply a regulated +15 and -15 VDC signal (each sourcing 15 mA maximum) with respect to S0, to isolated, external devices.
MMRG Series Section 5. Operation Change voltage switch settings only when the drive is disconnected from AC line voltage. Make sure both switches are set to their correct position. If the switches are improperly set to a lower voltage position, the motor will not run at full voltage WARNING! and may cause damage to the transformer.
MMRG Series Select Switches Line Frequency Select (SW501) Set the line frequency select switch to 60 HZ if the line frequency is 60 Hz or to 50 HZ if the line frequency is 50 Hz. See Figure COMMON DC VOLTAGE C512 C510 C511...
MMRG Series Startup Turn the speed adjust potentiometer or input voltage signal to minimum speed. Apply AC line voltage. Slowly advance the speed adjust potentiometer clockwise (CW) or increase the input voltage signal. The motor slowly accelerates as the potentiometer is turned CW or as the input voltage signal is increased.
Removing AC line power (both lines) is the only acceptable method for emergency stopping. For this reason, Minarik Drives strongly recommends installing an emergency stop switch on both AC line inputs (see Figure 6 on page 13).
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. Minarik Drives offers two accessory plug harnesses for connecting to the INHIBIT terminals: part number 201-0024 [plug with 18 in. (46 cm) leads];...
MMRG Series Regenerative Decel to Zero Speed The Run/Stop switch shown in Figure 13 may be used to decelerate a motor to a stop. Closing the switch between S0 and S2 decelerates the motor from a set speed to a stop at a deceleration rate determined by the ACC-DEC trim pot.
MMRG Series Section 6. Calibration Dangerous voltages exist on the drive when it is powered. When possible, disconnect the voltage input from the drive before adjusting the trim pots. If the trim pots must be adjusted with WARNING! power applied, use insulated tools and the appropriate personal protection equipment.
MMRG Series Maximum Speed (MAX SPEED) The MAX SPD setting determines the maximum motor speed when the speed adjust potentiometer or input voltage signal is set for maximum speed. To calibrate MAX SPD: Set the MAX SPD trim pot full CCW. Set the speed adjust potentiometer or input voltage signal for maximum speed.
Continuous operation beyond this rating may damage the motor. If you intend to operate beyond the rating, WARNING! contact your Minarik Drives representative for assistance. The F0RWARD TORQUE setting determines the maximum torque for accelerating and driving the motor in the forward direction. To calibrate...
Continuous operation beyond this rating may damage the motor. If you intend to operate beyond the rating, WARNING! contact your Minarik Drives representative for assistance. The REVERSE TORQUE setting determines the maximum torque for accelerating and driving the motor in the reverse direction. To calibrate...
MMRG Series IR Compensation (IR COMP) The IR COMP setting determines the degree to which motor speed is held constant as the motor load changes. Use the following procedure to recalibrate the IR COMP setting: Set the IR COMP trim pot to minimum (full CCW). Increase the speed adjust potentiometer or input voltage signal until the motor runs at midspeed without load (for example, 900 RPM for an 1800 RPM motor).
MMRG Series Section 7.Application Notes Direction Switch For a Forward/Reverse switch, use a single-pole, two-position switch with a single speed adjust potentiometer to regeneratively reverse the motor (Figure 15). If a Forward/Stop/Reverse switch is desired, use a single-pole, three-position switch (Figure 16). The MIN SPD setting is in effect for either direction.
MMRG Series Multiple Fixed Speeds Replace the speed adjust potentiometer with a series of resistors with a total series resistance of 10K ohms (Figure 17). Add a single pole, multi- position switch with the correct number of positions for the desired number of fixed speeds.
MMRG Series Adjustable Speeds Using Potentiometers In Series Replace the speed adjust potentiometer with a series of resistors with a total series resistance of 10K ohms (Figure 18). Add a single pole, multi- position switch with the correct number of positions for the desired number of fixed speeds.
MMRG Series Independent Adjustable Speeds Replace the speed adjust potentiometer with a single pole, multi- position switch, and two or more potentiometers in parallel, with a total parallel resistance of 10K ohms. Figure 19 shows the connection of two independent speed adjust potentiometers that can be mounted at two separate operating stations.
MMRG Series Independent Adjustable Forward and Reverse Speeds Replace the speed adjust potentiometer with a single pole, multi-position switch, and two or more potentiometers in parallel, with a total parallel resistance of 10K ohms. Figures 20 and 21 show the connection of two independent forward and reverse speed adjust potentiometers that can be mounted at two separate operating stations.
MMRG Series RUN/JOG Switch - Inhibit Connection 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. Connect the RUN/JOG switch and JOG pushbutton to the inhibit terminals as shown in Figure 22.
MMRG Series RUN/JOG Switch - Potentiometer Connection Connect the RUN/JOG switch and the JOG pushbutton as shown in Figure 23. When the RUN/JOG switch is set to JOG, the motor decelerates to zero speed. Press the JOG pushbutton to jog the motor. Return the RUN/ JOG switch to RUN for normal operation.
MMRG Series Leader-Follower Application In this application, use a PCM4 to monitor the speed of the leader motor (Figure 24). The PCM4 isolates the leader motor from the follower drive, and outputs a voltage proportional to the leader motor armature voltage.
MMRG Series Single Speed Potentiometer Control Of Multiple Drives Multiple drives can be controlled with a single speed adjust potentiometer using a USIM-8 at the input of each drive to provide isolation (Figure 25). Optional ratio potentiometers can be used to scale the USIM-8 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 is consistent with the motor ratings. For additional assistance, contact your local Minarik Drives distributor or the factory direct: (800) MINARIK or FAX: (800) 394-6334...
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MMRG Series PROBLEM POSSIBLE CAUSE SUGGESTED SOLUTIONS Line fuse 1. Line fuse is the wrong size. 1. Check that the line fuse is correct for the motor size. blows. 2. Motor cable or armature is 2. Check motor cable and shorted to ground.
MMRG Series PROBLEM POSSIBLE CAUSE SUGGESTED SOLUTIONS Motor does not 1. Noise on logic wires. 1. Place a .01 μF capacitor across terminals S0 and S2. stop when the speed adjust potentiometer is full CCW. Motor runs in 1. Motor connections to A1 1.
(12) months or 3000 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, Illinois 61080 USA.
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w w w.m i n ar i kd r ive s. co m 1 430 0 D E L A TOU R D R IV E SO U TH B ELO IT, IL 6 1080 ( 800) MI NA R IK 25 0 -024 0 Rev 7...
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