Baldor MN770 manual

Elevator Application Guide Installation & Operating Manual 3/97 MN770[...]

T able of Contents T able of Contents i MN770 Section 1 General Information 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

Section 1 General Information ii T able of Contents MN770 Section 5 Set-Up Information 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC SCR Controls 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

Section 1 General Information General Information 1-1 MN770 Introduction Baldor Electric manufactures several dif ferent Drive types for the elevator industry . These drives are DC SCR (Thyristor), AC Inverter (VVVF) and AC V ector . Each drive type is best suited for a specific application in the elevator market. This manual provides information f[...]

Section 1 General Information 1-2 General Information MN770 Limited W arranty For a period of two (2) years from the date of original purchase, BALDOR will repair or replace without charge controls which our examination proves to be defective in material or workmanship. This warranty is valid if the unit has not been tampered with by unauthorized p[...]

General Information 1-3 MN770 Safety Notice This equipment contains voltages that may be as great as 1000 volts! Electrical shock can cause serious or fatal injury . Only qualified personnel should attempt the start-up procedure or troubleshoot this equipment. This equipment may be connected to other machines that have rotating parts or parts that [...]

Section 1 General Information 1-4 General Information MN770 Caution: T o prevent equipment damage, be certain that the electrical service is not capable of delivering more than the maximum line short circuit current amperes listed in the appropriate control manual, 230 V AC or 460 V AC maximum per control rating. Caution: Disconnect motor leads (T1[...]

Section 2 T echnologies T echnologies 2-1 MN770 Overview Baldor Electric manufactures six drive types for the elevator industry . Each drive type (Control and Motor) is best suited for a specific application. These Series “H” Controls are: S 15H Inverter S 17H V ector (Encoderless) S 18H V ector S 19H DC SCR S 20H DC SCR (Line Regenerative) S 2[...]

2-2 T echnologies MN770 DC SCR Control NEMA T ype C designation of electrical power source equipment for adjustable speed drives. Series 19H DC SCR (not used in elevator applications) Series 20H DC SCR (Line Regenerative) DC SCR controls are used in elevator applications where speeds range from 50 to over 1000 FPM. The Baldor DC SCR (Thyristor) con[...]

T echnologies 2-3 MN770 Inverter Series 15H Inverter Series 21H Inverter (Line Regenerative) IEEE-519 Compliant T ypically Inverters are used in elevator applications where speeds up to 150 FPM are required. The Baldor inverter converts the three phase AC line power to fixed DC power . The DC power is then pulse width modulated into synthesized thr[...]

2-4 T echnologies MN770 V ector Series 17H Encoderless V ector Series 18H V ector Series 22H V ector (Line Regenerative) V ector drives are used in elevator applications where speeds range from 50 to over 700 FPM. Baldor is a pioneer in Flux V ector T echnology and we continue to be the leader in new product development with our Series 18H V ector [...]

Section 3 Application Considerations Application Considerations 3-1 MN770 General Considerations A good understanding of elevator applications and requirements is essential for proper selection of drive components. Several classifications or categories can be identified to make selection easier . These are: 1. The speed of the car in the hoistway .[...]

Section 1 General Information 3-2 Application Considerations MN770 Electric Drives Electric drives overlap both of these technologies at their upper limits of speed and extend to elevator speeds of more than 700 feet per minute. Cable traction elevators are suspended by cable which is wrapped around a drum. The elevator has a counter weight to elim[...]

Section 1 General Information Application Considerations 3-3 MN770 Common Control Features S Wide Input V oltage Range 180 - 264 V AC 60 Hz 180 - 230 V AC 50 Hz 340 - 528 V AC 60 Hz 340 - 460 V AC 50 Hz S Keypad operation - A common keypad is used for all Baldor Series H Controls. The keypad is used to program and operate the control. S Plain Engli[...]

Section 1 General Information 3-4 Application Considerations MN770 Elevator Motor Horsepower Selection Selection of a motor and control for an elevator application is dependent upon several variables. The primary variable is the overall mechanical ef ficiency of the elevator . The efficiency of gear driven elevators varies from about 45 percent for[...]

Section 1 General Information Application Considerations 3-5 MN770 T able 3-2 can be used to determine the size control and motor to use for your application. Find the “Car Speed” column in the first row of the table. Follow that column down to find the “Car Capacity” row . Follow that row to the left and read the recommended HP/KW size of [...]

Section 1 General Information 3-6 Application Considerations MN770 Dynamic Brake Hardware Selection 15H and 18H Drives Baldor Series 15H Inverters and Series 17H and 18H V ector Drives require optional dynamic brake hardware to dissipate regenerative power from the motor . The conditions causing regeneration for an elevator occur about 50 percent o[...]

Section 4 Hardware Information Hardware Information 4-1 MN770 General Considerations All Baldor Series H drives are designed for ease of use. The keypad interface provides the same interface for each Series H control. In other words, if you are familiar with parameter set-up for one Series H drive type, the set-up for another Series H drive is simi[...]

4-2 Hardware Information MN770 Figure 3-1 Encoder Cables Mylar Sleeve Figure 3-2 Encoder Connections See Control manual for proper terminal tightening torque.[...]

Section 1 General Information Hardware Information 4-3 MN770 Encoder Cable Connection Encoder cable must be separated by at least 3” from parallel runs of power wires. Encoder cables that cross power wires must cross at a 90 ° angle only . Encoder wires must be #22 A WG (0.34mm 2 ) minimum, 200 feet maximum length and must have an overall shield[...]

4-4 Hardware Information MN770 Buffered Encoder Output The DC SCR and V ector controls provides a buf fered encoder output on pins J1-31 to J1-38 as shown in Figure 3-3. This output may be used by external hardware to monitor the encoder signals. It is recommended that this output only drive one output circuit load. Driving multiple loads is not re[...]

Section 5 Set-Up Information Set-Up Information 5-1 MN770 DC SCR Controls DC motors use voltage to obtain their speed and current to develop their output torque. A DC SCR control must be able to supply the required voltage and current to operate the motor under all conditions of load and speed. Note: Do not assume that having the required horsepowe[...]

Section 1 General Information 5-2 Set-Up Information MN770 Final Installation After the control has been mounted and wired, the final settings can be made. 1. The CALC PRESETS, CMD OFFSET TRIM (if using any analog mode), and CUR LOOP COMP auto tune tests should be performed. Close the armature contactor when doing the CUR LOOP COMP test. 2. The ele[...]

Section 1 General Information Set-Up Information 5-3 MN770 Final Adjustments Roughness and instability of motor operation are often the result of a loosely mounted feedback device. Incorrect adjustment of the Level 1 DC Control, ARM PROP GAIN parameter and/or the SPEED PROP GAIN can also cause speed instability and oscillation of the car . Note: It[...]

Section 1 General Information 5-4 Set-Up Information MN770 Recommended Power Up/Down Sequence for Elevators Using DC SCR Controls The following is a recommended sequence for turning on and of f the elevator drive and external OEM control. Figure 5-4 shows this sequence. Figure 5-4 T ypical Power Up/Down Sequence for DC SCR Controls. M Contactor Arm[...]

Section 1 General Information Set-Up Information 5-5 MN770 Inverter Controls AC induction motors may have their speed adjusted by using an AC Inverter (VVVF) to change the voltage and frequency supplied to the motor . The motor speed will be relatively proportional to the frequency supplied. An AC Inverter must be able to supply the amount of curre[...]

Section 1 General Information 5-6 Set-Up Information MN770 Recommended Power Up/Down Sequence for Elevators Using Inverter Controls The following is a recommended sequence for turning on and of f the elevator drive and external OEM controller . Figure 5-5 shows this sequence. 1. Close the M-Contactor . 2. Close the drive ENABLE. 3. Use the DRIVE ON[...]

Section 1 General Information Set-Up Information 5-7 MN770 Recommended Power Up/Down Sequence for Elevators Using Inverter Controls The following is a recommended sequence for turning on and of f the elevator drive and external OEM control. Figure 5-5 shows this sequence. Figure 5-5 Power Up/Down Sequence for Inverter Controls. Close M Open M Enabl[...]

Section 1 General Information 5-8 Set-Up Information MN770 V ector Controls If this is a modernization, do not disconnect the old control from the motor . It is needed to operate the motor for some preliminary measurements before it is disconnected. See Modernization. Equipment Required The following equipment is required for this upgrade. 1. Eleva[...]

Section 1 General Information Set-Up Information 5-9 MN770 Modernization Continued 3. Apply power to the existing elevator control wiring and the V ector Control. 4. Refer to T able 5-2 “Pre-Installation T ests”. Perform all tests with the elevator connected in this temporary configuration. It is important to record all information for future u[...]

Section 1 General Information 5-10 Set-Up Information MN770 Final Wiring Connections 1. Disconnect all electrical power to all controls. 2. Disconnect the temporary wiring that was used for the Pre-Installation tests from the V ector control. 3. Connect the V ector control to the AC line, motor and encoder as shown in the Installation and Operating[...]

Section 1 General Information Set-Up Information 5-1 1 MN770 Initial Set-up If the V ector control has already been programmed by the OEM, the correct motor data has been installed. If this information has not been programmed, set the correct parameter values (refer to the interface specifications from the elevator controller OEM). Y ou will need t[...]

Section 1 General Information 5-12 Set-Up Information MN770 Initial Set-up Continued j. Set Level 1 VECT OR CONTROL Block, SLIP FREQUENCY as desired. This value can be calculated from the values recorded previously in T able 5-2. Record these calculated values in T able 5-3. Calculate the Slip RPM of the motor: Slip RPM + (RPM of Balanced Car) * (R[...]

Section 1 General Information Set-Up Information 5-13 MN770 Recommended Power Up/Down Sequence for Elevators Using V ector Controls The following is a recommended sequence for turning on and of f the elevator drive and external OEM control. Figure 5-2 shows this sequence. 1. Close the M-Contactor . 2. After a 20mSec minimum delay (to ensure the M C[...]

Section 1 General Information 5-14 Set-Up Information MN770 T able 5-2 Pre-Installation T ests Date: Customer: Address: Elevator Location: Address: Motor Ratings (From Nameplate) Rated V oltage: Rated Current: Rated Speed (RPM): Rated Frequency: Installation Data Encoder Counts (PPR): Operating Mode: Dynamic Operating Conditions Balanced Car T est [...]

Section 1 General Information Set-Up Information 5-15 MN770 T able 5-3 V ector Control Worksheet Date: Catalog Number: Rated V oltage: Rated Horse Power: Rated Current: Slip RPM: % Rated Motor Load: Slip Adjustment V alue: Slip Frequency: Installed by: Installed by: Date:[...]

Section 1 General Information 5-16 Set-Up Information MN770[...]

Section 6 T roubleshooting T roublehsooting 6-1 MN770 DC SCR Control Roughness of car ride quality and instability of motor operation are often a result of poor mounting of the feedback device. Incorrect adjustment of the ARM GAIN and/or the RA TE PROP GAIN can also cause speed instability and oscillation of the car . If adjustment of RA TE PROP GA[...]

Section 1 General Information 6-2 T roublehsooting MN770 Electrical Noise Considerations All electronic devices including a Series H Control are vulnerable to significant electronic interference signals (commonly called “Electrical Noise”). At the lowest level, noise can cause intermittent operating errors or faults. From a circuit standpoint, [...]

Section 1 General Information T roublehsooting 6-3 MN770 Electrical Noise Considerations Continued Combining an R-C snubber and twisted-pair shielded cable keeps the voltage in a circuit to less than 2 V for a fraction of a millisecond. The waveform shown in Figure 6-3 in addition to the snubber across the coil, the adjacent wire is grounded in a t[...]

Section 1 General Information 6-4 T roublehsooting MN770 Electrical Noise Considerations Continued Wires between Controls and Motors Output leads from a typical 460 V AC drive controller contain rapid voltage rises created by power semiconductors switching 650V in less than a microsecond, 1,000 to 10,000 times a second. These noise signals can coup[...]

Section 1 General Information T roublehsooting 6-5 MN770 Electrical Noise Considerations Continued Even input AC power lines contain noise and can induce noise in adjacent wires. This is especially severe with SCR controlled DC drives, current–source and six–step inverters. Figure 6-9 shows a transient induced in 1–ft. wire adjacent to AC inp[...]

Section 1 General Information 6-6 T roublehsooting MN770 Electrical Noise Considerations Continued Control Enclosures Motor controls mounted in a grounded enclosure should also be connected to earth ground with a separate conductor to ensure best ground connection. Often grounding the control to the grounded metallic enclosure is not suf ficient. U[...]

Section 1 General Information T roublehsooting 6-7 MN770 Wiring Practices The type of wire used and how it is installed for specific applications makes the dif ference between obtaining reliable operation and creating additional problems. Power Wiring Conductors carrying power to anything (motor , heater , brake coil, or lighting units, for example[...]

Section 1 General Information 6-8 T roublehsooting MN770 Optical Isolation Isolating electrical circuits with some form of light transmission reduces the electrical noise that is transmitted from one part of a circuit to another . That is, an electrical signal is converted to a light signal that is transmitted to a light receiver . This converts th[...]

Appendix A Appendix A-1 MN770 Load Weighing / T orque Feed Forward In many advanced elevator applications, the system is designed to weigh the elevator load to offset the counterweight of the car . We also refer to this as a torque feed forward application. Both the Baldor AC V ector (Series 18H and 22H) and Series 20H SCR Controls can be programme[...]

Section 1 General Information A-2 Appendix A MN770 The parameters and inputs used for torque feed forward are indicated in the T able A-1. For a V ector control, the OPERA TING MODE selected will be BIPOLAR or 15 SPEED. For a Series 20H DC SCR control, BIPOLAR HOIST or 7 SPEED HOIST should be selected. T able A-1 Analog Command Select Parameter Inp[...]

Appendix B Appendix B-1 MN770 Serial Communications Baldor ’s Series 15H and 21H Inverters, 20H DC SCR or 18H and 22H V ector controls may be monitored or operated remotely by a modem an a Serial Communication expansion board on the control. By using either the EXB001A01 or EXB002A01 Serial Communications boards for RS-232 communications, the con[...]

Section 1 General Information B-2 Appendix B MN770[...]

Appendix C Appendix C-1 MN770 Elevator Industry Glossary Adjusters – The elevator mechanic who does advanced maintenance or supervisory functions in conjunction with mechanics. Approach Speed – A fixed speed sometimes used on high speed elevators as an intermediate speed for the last few feet before switching to the leveling speed. Balanced Car[...]

Section 1 General Information C-2 Appendix C MN770 Gearless Elevator – An elevator powered by a low speed motor (usually DC) which has the drive sheave mounted directly on the motor shaft. It uses no gearbox. These are used in high speed elevators. T ypical motor speeds are 70 -150 RPM at contract speed. Governor – A mechanical speed measuring [...]

Section 1 General Information Appendix C-3 MN770 Pattern Generator – An external circuit board used to generate an adjustable S–curve speed command for smooth acceleration and deceleration. This signal is used by the motor control instead of any on–board S–curve. It uses feedback from the elevator by means of a DC tach or encoder . Pit – [...]

Section 1 General Information C-4 Appendix C MN770[...]

BALDOR ELECTRIC COMP ANY P .O. Box 2400 Ft. Smith, AR 72902–2400 (501) 646–471 1 Fax (501) 648–5792  Baldor Electric Company MN770 Printed in USA 3/97 C&J300[...]