Variable-frequency drives for 3-phase and single-phase ac motors (80 pages)
Summary of Contents for Minarik MMRG Series
Page 1
MMRG SERIES MMRG30U MMRG31U MMRG40U MMRG30U-PCM MMRG31U-PCM MMRG40U-PCM Four-Quadrant, Regenerative Drives for DC Motors...
Page 2
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. Minarik 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.
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.
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 (see Figure 1).
Regenerative Drives Quadrant II Quadrant I Quadrant III Quadrant IV MOTOR MOTOR ROTATION TORQUE NOTE: ARROWS IN SAME DIRECTION = MOTOR ACTION ARROWS IN OPPOSITE DIRECTION = REGENERATIVE ACTION Figure 1. Four Quadrant Operation...
Installation Mounting Warning Do not install, rewire, or remove this control with input power applied. Doing so may cause fire or serious injury. Make sure you have read and understood the Safety Warnings on page i before attempting installation. • Drive components are sensitive to electrostatic fields. Avoid direct contact with the circuit board.
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.
Induced voltage can cause unpredictable behavior in any electronic device, including motor controls. 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.
I/O on this drive. Heat sinking MMRG Series drives require an additional heat sink when the continuous armature current is above 5 ADC. Use Minarik heat sink kit part number 223-0159. Use a thermally conductive heat sink ®...
Installation Speed adjust potentiometer 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 the speed adjust potentiometer through a 0.38 in. (10 mm) hole with the hardware provided (Figure 5). Install the circular insulating disk between the panel and the 10K ohm speed adjust potentiometer.
Failure to heed this directive may result in fire or serious injury. Minarik strongly recommends the installation of a master power switch in the voltage input line, as shown in Figure 6, page 13. The switch contacts should be rated at a minimum of 200% of motor nameplate current and 250 volts.
Installation Motor 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. If this is opposite of the desired rotation, simply reverse the wiring of A1 and A2 with each other.
Size (amps) 1/20 1/10 1/15 1 1/2 Minarik Corporation offers two fuse kits: part number 050–0069 (3–8A Fuse Kit) and 050–0073 (5–20A Fuse Kit). Both fuse kits include a 1/2A pico fuse (part number 050–0064) which protects the transformer and logic.
Installation REVERSE FORWARD DC VO C512 C511 C510 DC VO (a) Bidirectional Operation FORWARD REVERSE DC VO DC VOL C511 C512 C512 C510 C511 C510 DC VO DC VOL C509 C509 (b) Unidirectional Operation, (c) Unidirectional Operation, Forward Direction Reverse Direction Figure 7.
Installation Voltage follower The drive may be wired to follow a floating (isolated) 0 to ±10VDC signal that is isolated from earth ground instead of using a speed adjust potentiometer. Connect the signal input to S2, and the signal common to S0 (see Figure 8). SIGNAL ±10 VDC COMMON...
Installation Voltage follower (-PCM models) PCM series drives can be configured to follow a grounded (non- isolated) voltage signal. To configure the drive to follow a voltage signal, connect the signal leads to the SIGNAL INPUT POS and SIGNAL INPUT NEG terminals, observing proper polarity. Note: There are two locations where signal input connections can be made, either to terminals TB501 or to the fast-on terminal posts located below TB501.
Installation DIR SWITCH OPEN OR CLOSE TO CHANGE DIRECTION FORWARD TORQUE POS (+) NEG (-) 0 to ±10 VDC FAST-ON TERMINALS VOLTAGE SIGNAL PARALLEL TB501 INPUT Figure 9. Voltage Follower Connection (-PCM Models)
Do not short the +15 and -15 terminals for any reason. Shorting these terminals may damage the drive. The MMRG Series drives can supply a regulated +15 and –15 VDC signal (each sourcing 15 mA maximum) to isolated, external devices. See Figure 10 for the voltage supply terminal locations.
Installation Line frequency switch SW501 of the top board is the line frequency switch (see Figure 11). Set the switch to 50HZ if the line frequency is 50 Hz, or to 60HZ if the line frequency is 60 Hz. COMMON DC VOLTAGE C512 C510...
Operation Warning Dangerous voltages exist on the drive when it is powered. BE ALERT. High voltages can cause serious or fatal injury. For your safety, use personal protective equipment (PPE) when operating this drive. Before applying power: • Verify that no conductive material is present on the printed circuit board.
Operation Startup and shutdown To start the drive: 1. Set the speed adjust potentiometer for zero speed, or the reference voltage to zero, if in voltage follower mode. 2. Apply AC line voltage. 3. Slowly turn the speed adjust potentiometer clockwise or counterclockwise to rotate the motor in the forward or reverse direction.
Removing AC line power (both L1 and L2) is the only acceptable method for emergency stopping. For this reason, Minarik strongly recommends installing an emergency stop switch on both the L1 and L2 inputs (see Connections section - page 11).
Operation Decelerate to a stop The RUN/STOP switch in Figure 12 may be used to decelerate a motor to a stop. Closing the switch between S2 and S0 decelerates the motor from set speed to a stop. The ACC–DEC trimpot setting determines the rate at which the drive accelerates and decelerates.
Short the INHIBIT terminals to regeneratively brake the motor (see Figure 13 for INHIBIT terminal location). Reopening the INHIBIT terminals causes the motor to accelerate to set speed. Minarik Corporation offers two accessory plug harnesses for the INHIBIT terminals: Minarik...
BE ALERT. High voltages can cause serious or fatal injury. MMRG Series drives have five user adjustable trimpots: MAX SPD, ACC–DEC, FORWARD TORQUE, REVERSE TORQUE, and IR COMP. MMRG-PCM series drives have two additional user adjustable trimpots: FWD SPD ADJ and REF SPD ADJ.
Calibration MAX SPD The MAX SPD trimpot setting determines the maximum forward and reverse speed. It is factory set for maximum rated motor speed. To calibrate MAX SPD: 1. Set the MAX SPD trimpot full CCW. 2. Turn the speed adjust potentiometer full CW. 3.
Although FORWARD TORQUE can be set to 120% of drive nameplate current rating, continuous operation beyond this rating may damage the motor. If you intend to operate beyond this rating, contact your Minarik representative for assistance. The FORWARD TORQUE setting determines the maximum current limit for driving the motor in the forward direction.
If you intend to operate beyond this rating, contact your Minarik representative for assistance. The REVERSE TORQUE setting determines the maximum current limit for driving the motor in the reverse direction. It is factory set at 120% of maximum rated motor current.
Calibration IR COMP The IR COMP trimpot setting determines the degree to which motor speed is held constant as the motor load changes. It is factory set for optimum motor regulation. Refer to Figure 15 on page 33 for recommended settings or use the following procedure to recalibrate the IR COMP setting: 1.
Calibration ACC–DEC The ACC–DEC trimpot setting determines the time the motor takes to accelerate to a higher speed, or decelerate to a lower speed in the forward or reverse direction, within the limits of available torque. The ACC–DEC setting is factory set for its fastest forward acceleration and deceleration time (full CCW).
Calibration FWD SIG ADJ (-PCM models) The FWD SIG ADJ setting determines the speed that the motor will achieve when the signal is at its maximum voltage. For MMRG30U-PCM and MMRG31U-PCM, it is factory-set to deliver a 90 VDC armature output with a 10 VDC input signal. For MMRG40U-PCM, it is factory-set to deliver a 180 VDC armature output with a 10 VDC input signal.
Application Notes FWD-REV switch Use a single-pole, two-position switch with a single speed adjust potentiometer to plug reverse the motor (Figure 17). 10K OHM SPEED POTENTIOMETER COMMON DC VOLTAGE C512 C510 C511 DC VOLTAGE C509 Figure 17. Forward-Reverse Switch...
Application Notes FWD-STOP-REV switch Use a single-pole, three-position switch with a single speed adjust potentiometer to stop a motor between reversal (Figure 18). Set the switch to the center position to decelerate the motor to a stop. 10K OHM SPEED POTENTIOMETER STOP COMMON...
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 19). The speed adjust potentiometers can be mounted at two separate operating stations. SPEED 2 20K OHMS SPEED 1...
Application Notes Independent forward and reverse speeds Connect two speed adjust potentiometers as shown in Figure 20 to select between independent forward and reverse speeds. 10K OHMS 10K OHMS COMMON DC VOLTAGE C512 C510 C511 DC VOLTAGE C509 Figure 20. Independent Forward and Reverse Speeds...
Application Notes Independent foward and reverse speeds with FWD-STOP-REV switch Use a single-pole, three-position switch to stop the motor when the switch is in the center position (Figure 21). 10K OHMS 10K OHMS STOP COMMON DC VOLTAGE C512 C510 C511 DC VOLTAGE C509 Figure 21.
3. The motor must be rated for the drive’s rated armature voltage and current. 4. Check that all terminal block connections are correct. For additional assistance, contact your local Minarik distributor, or the factory direct: 1-800-MINARIK (646-2745) or Fax: 1-800-394-6334...
Page 49
Troubleshooting Problem Possible Suggested Causes Solutions Line fuse blows. 1. Line fuse is the 1. Check that the line wrong size. fuse is correct for the motor size. 2. Motor cable or 2. Check motor cable armature is shorted and armature for to ground.
Page 50
Troubleshooting Problem Possible Suggested Causes Solutions Line fuse does not blow, 1. Speed adjust 1. Increase the speed but the motor does not potentiometer or adjust potentiometer run. reference voltage is setting or reference set to zero speed. voltage. 2. Speed adjust 2.
Page 51
Troubleshooting Problem Possible Suggested Causes Solutions Motor runs too fast. 1. MAX SPD not 1. Calibrate MAX SPD. calibrated. Motor will not reach the 1. MAX SPD setting is 1. Increase MAX SPD desired speed. too low. setting. 2. IR COMP setting is 2.
Troubleshooting Replacement Parts Replacement parts are available form Minarik Corporation and its distributors for this drive series. Table 2. Replacement Parts Model No. Symbol Description Minarik P/N MMRG30U R503 0.01 ohm, 5 W Resistor 032–0129 MMRG30U-PCM SCR501–508 800 V, 25 A SCR 072–0042...
Minarik Corporation hereby certifies that its MMRG series drives has been approved to bear the “CE” mark provided the conditions of approval have been met by the end user. The MMRG series has been tested to the following test specifications: EN55011:1991 (emissions), and EN50082-1:1992 (immunity) Compliance allows the MMRG series drives to bear the CE mark.
In addition to EMI/RFI safeguards inherent in the MMRG design, external filtering is required. ® Minarik requires the Corcom AC line filters listed in Table 3, as well as a line-to-line capacitor connected between L1 and L2. The capacitor must be rated at 2.2 microfarads and 250 volts minimum.
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...
Page 56
CE 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.
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,...
Page 60
901 E Thompson Avenue Glendale, CA 91201-2011 Tel.: 1-800-MINARIK (646-2745) Fax: 1-800-394-6334 www.minarikcorp.com Document number 250-0240, Revision 5 Printed in the U.S.A – August 2002...
Need help?
Do you have a question about the MMRG Series and is the answer not in the manual?
Questions and answers