Electric motor predictive and preventive maintenance guide abstract electric motor performance is vital to the reliable and efficient operation of power plants. The magnetic field rotation is automatically obtained commutating the active coil through mechanical switches brushes. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Motordoc llc provides industrial and commercial consulting, training and technology for electrical and mechanical system reliability. They provide the most surface contact since they are worn in. In reality it is a cheap low powered motor that sells for about. From a repair standpoint, dc motors tend to take longer to repair due to their makeup.
Electric motor system diagnostics richard scott alltest pro, llc. We are constantly doing what everyone else just talks about. Information, editorials and tech tips for you to use. Maintenance and troubleshooting three phase induction motor. For these hours to appear on your certificate, you must.
Do not lift both the motor and driven equipment with the motor lifting means. Thank you for choosing to purchase a recreational vehicle by forest river inc. Timesaving tips include changing brushes, checking winding insulation with a megohmmeter, and machining commutators in place. Electric motor system diagnostics electric motor system diagnostics richard scott alltest pro, llc this session is eligible for 1 contact hour. When repairing an electric motor,is it necessary to know the number of. Inspections give operators visibility of motor unit condition, encourage timely repair and preventative maintenance work, and. Typical inspections when troubleshooting dc motor problems or doing preventative maintenance. Note before removing dc motor brushes always put the brush back in the same hole of the motor. Essential for anyone who needs to buy, install, troubleshoot, maintain, or repair small to industrialsize electric motors, this practical guide contains new information on threephase motors along with coverage of the. Have your badge scanned at the door attend 90% of this presentation fill out the online evaluation for this session. Test the shunt field continuity by measuring and recording the resistance of the shunt with an ohmmeter. Onsite diagnostic services, including laser alignment and vibration analysis. Facilities instructions, standards, and techniques.
Electric motor fundamentals free online training program this is a free online training program aiming to enhance your motor knowledge. The frequency of routine service varies widely between applications. Knowing when to perform this maintenance is the key. Electric motor maintenance and troubleshooting, 2nd. Revere electrics easa certified motor repair shop in peru, il is designed with the most recent equipment and an experienced team for repair of brakes, clutches, and motors. Predictive and preventive maintenance ips field services. Download it once and read it on your kindle device, pc, phones or tablets. Induction motor maintenance february 17, 2019 february 24, 2012 by electrical4u maintenance as the name suggests it is the action necessary for retaining or restoring a piece of equipment or machine to the specified operable condition to achieve its maximum useful life. Proper maintenance and upkeep in dc motor units morgan. However, existing maintenance recommendations proposed by.
The charts also show you whether the purchase of a new energyefficient motor is the costsaving alternative to repairing the motor inhouse or by a motor repair shop. This writer created motor repairreplacement decision tree charts while analyzing data from the department of energy doe motormaster software program. The manufacturer of these products, baldor electric company, became abb motors and mechanical inc. Next time you have a dc motor that needs repair, trust york to deliver time and time again. Motor maintenance scheduled routine care introduction the key to minimizing motor problems is scheduled routine inspection and service. Today, the brushless motor is far more common than the brushed motor.
Some sections may explain explicitly between the three configurations, but have different requirements for each. The load angle is almost constant and it is about 90allowing the maximum efficiency. Use features like bookmarks, note taking and highlighting while reading electric motor maintenance and troubleshooting, 2nd edition. A general guide to dc motor maintenance ohio electric motors. A dc motor must have 100% field strength to produce its maximum torque and to keep the armature amperage within proper limits. Dc motor troubleshooting, inspection and learn to repair of dc motor brushes and commutators. Electric motor maintenance and troubleshooting, 2nd edition kindle edition by hand, augie.
Motor operation and maintenance flashcards quizlet. They also maintain a strong industrial niche because of the ability to alter the torque to speed ratio exclusive to brushed motors. The program is available from the doe website to help you control your spare motor inventory. Be sure to read and understand all of the safety notice statements in mn408 or product specific manual. The failure of one or more critical motors could cause lost capacity and excessive repair and maintenance cost. Dc motor troubleshooting based on the easa technote troubleshooting dc motors always disconnect the power before handling any parts of the electrical equipment lock out and tag out all electrical circuits test for voltage before touching any components. Lubricate the bearings only when scheduled or if they are noisy or running hot. Maintenance crews strive to reduce maintenance costs and manage their workloads more effectively. The high cost of the resultant downtime eats deeply into profits. This ensures electrical equipment is kept in good working condition at all times.
Repair and overhaul services motion electric motor services. Maintenance and troubleshooting of electric motors esr motor. Ac dc motor repair, ranging up to 1,000 hp and weighing up to 20,000pounds. By using these charts 1 for ac motors, 1 for dc motors, you can quickly determine whether your company should either repair or replace a motor. This guide provides information on establishing an effective maintenance program to help prevent unexpected motor failures, costly downtime, and unnecessary maintenance costs. Smear a little lubricant on your cloth and wipe the area where the bearings were. A wellplanned preventive maintenance program is the key to dependable, longlife operation of motors and generators. Integrated power services, or ips, is the leading provider of electric motor and generator repair services in north america. Mechanical energy what is an electric motor an electric motor is a device converting electrical energy into mechanical energy usually a torque. Feb 09, 2011 the commutators are the segmented copper bars on the motor s or generators dc side that are connected to the coils of the armature. Maintenance and troubleshooting of electric motors reliance electric posted 11005 motor maintenance scheduled routine care. Nameplates, declaration of conformity and other collateral material may contain the. The very first thing that you should do before starting any type of maintenance on a motor is a visual inspection, a lot of times the trouble can be found just by looking, because if the problem is that bad then it should be very obvious by observation.
Dc motor applications tecowestinghouse motor company dc motors are ideally suited to a multitude of industrial and marine applications in which high torque and variable speed are required. This conversion is usually obtained through the generation of a. Electric motor maintenance and troubleshooting, second edition explains in detail how all types of ac and dc motors work. Abb training abb service for motors and generators. Osburn bureau of reclamation hydroelectric research and technical services group denver, colorado 5f. Electric motor predictive and preventive maintenance guide electric motor failure could result in lost capacity as well as excessive repair and maintenance costs. February 17, 2019 february 24, 2012 by electrical4u maintenance as the name suggests it is the action necessary for retaining or restoring a piece of equipment or machine to the specified operable condition to achieve its maximum useful life. The commutators are the segmented copper bars on the motors or generators dc side that are connected to the coils of the armature. In addition dc generator, dc motor types and applications are.
Fist 41b, maintenance scheduling for electrical equipment 5c. Put the top half of the ac motor casing back on the bottom half. Installation and maintenance guide dc motors leroy somer. This article describes ac electrical motor troubleshooting. Slide each bearing in using your fingers to position them correctly. Reduced field strength will cause high armature currents. Electric motor predictive and preventive maintenance guide. Learn the basics of electromagnetic induction, motor selection criteria and proper maintenance techniques. Maintenance and troubleshooting of electric motors reliance electric posted 11005 motor maintenance scheduled routine care introduction. Simple steps to electric motor maintenance r baker. Perform regular inspections appropriate inspections are at the heart of successful dc unit upkeep. Before starting maintenance procedures, be positive that. Maintenance safe maintenance practices performed by qualified personnel are imperative.
Brushed dc motors are still used frequently in household appliances and in automobiles. This paper simply covers the maintenance of dc machines. Augie hand had 30 years of handson experience in repairing and troubleshooting motors, followed by 15 years of giving seminars on the subject for electric motor repair shop technicians and inhouse training for large industry maintenance technicians. All operation, maintenance, and repair tasks are to be. Headquartered in greenville, sc, with locations coast to coast, we offer inshop repair services, field services and distribution to over 4,000 customers working in continuous process, assetintensive industries. Be sure required safety guards are in place before starting equipment. Always keep hands and clothing away from moving parts. A wellplanned electric motor preventive maintenance programme is the key to dependable, longlife operation of electric motors. Follow the steps in section 2 to replace the bearings and repair your ac motor. A fully uptodate, handson guide to electric motors. These applications include ship propulsion, mine hoists and steel rolling mills. In the case of total replacement, the gearbox is shipped to one of brad. Five tips for better electric motor maintenance it is essential to perform preventive maintenance pm checks on electric motors as a part of managing facility assets because they have a massive impact on a business productivity and profit. The very first thing that you should do before starting any type of maintenance on a motor is a visual inspection, a lot of times the trouble can be found just by looking, because if the problem is that bad then it should be very obvious by ob.
The main objective of this kind of maintenance is to repair and replace the motor when a failure occurs. Bad elevator dcmotor and generator maintenance youtube. Inspections give operators visibility of motor unit condition, encourage timely repair and preventative maintenance work, and provide a regular source of. Electric motor maintenance and troubleshooting, 2nd edition. Each motor carrier and intermodal equipment provider must systematically inspect, repair, and maintain all commercial motor vehicles cmvs under its control.
Page 2 limited warranty motorized products forest river inc. Dc electric motors and generators have fueled industrial production worldwide for many years now. Disconnect the motor from the electricity supply before proceeding to repair it. Reactive maintenance or breakdown maintenance as it is referred to as well, does not imply any regular service or tests. By using these charts 1 for ac motors, 1 for dc motors, you can quickly determine whether your company should either. However, both can be found in a wide range of applications. The following table outlines that difference in each construction, working principles and services needs.
With its vast experience and extensive data bank from all major electric motor oems, motion electric motor services is a key partner to maintain and protect the productivity of the critical equipment at the heart of your activities. Almost all electrical equipment requires planned inspection and maintenance being carrying out. Direct current motors remain a viable option in certain applications and someone has to know how to service them. Including the motors in the maintenance schedule for the driven machine or general plant equipment is usually sufficient. Post a question or comment about how to troubleshoot electric motors such as air conditioning compressor motors, heating equipment burner or fan motors, swimming pool motors, water well pump motors. Regular motor maintenance to avoid failure and prolong. Since dc machines require more attention than their ac counterparts, dc maintenance can help achieve both goals. Be sure to read and understand all of the safety notice.
Electric motor maintenance and troubleshooting, second edition explains. An imprint of the brush, signs of arcing or uneven wear indicate the need to remove the. Gearbox maintenance tips rapid repair solutions once the problem is identified, the cost of repair and downtime must be weighed when deciding whether to fix the problem onsite or have the gearbox completely replaced. Brush dc motor summary the magnetic field intensity is proportional to the current forced into the motor leads. He owned an electric motor repair shop for a number of years, and he taught the electric motor repair course at. Yes, i would like to receive emails from motordoc llc.
In modern plant operations, unscheduled stoppage of production or long repair shutdowns are intolerable. Motordoc llc provides electrical machinery, electrical reliability and industrialcommercial consulting and training as well as the first continuous monitoring electrical and current signature analysis system and esa data collection systems. You are trained and qualified to perform maintenance on this machine. Disconnect power to the motor before performing service or maintenance.
597 1103 989 1031 507 567 187 227 1414 751 480 874 983 925 82 248 365 986 1284 451 768 603 821 18 1461 490 63 619 1137 975 894