Manuale d’uso / di manutenzione del prodotto MN770 del fabbricante Baldor
Vai alla pagina of 54
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.
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.
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.
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.
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.
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.
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 .
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.
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 .
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.
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.
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 .
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 .
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 .
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
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: S.
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 .
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Baldor MN770 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Baldor MN770 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Baldor MN770 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Baldor MN770 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Baldor MN770, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Baldor MN770.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Baldor MN770. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Baldor MN770 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
