An imprint of the brush, signs of arcing or uneven wear indicate the need to remove the. In reality it is a cheap low powered motor that sells for about. Nameplates, declaration of conformity and other collateral material may contain the. The frequency of routine service varies widely between applications. Integrated power services, or ips, is the leading provider of electric motor and generator repair services in north america. Motor operation and maintenance flashcards quizlet. Maintenance and troubleshooting of electric motors reliance electric posted 11005 motor maintenance scheduled routine care introduction. Proper maintenance and upkeep in dc motor units morgan.
Brush dc motor summary the magnetic field intensity is proportional to the current forced into the motor leads. A wellplanned preventive maintenance program is the key to dependable, longlife operation of motors and generators. Dc electric motors and generators have fueled industrial production worldwide for many years now. Thank you for choosing to purchase a recreational vehicle by forest river inc. Installation and maintenance guide dc motors leroy somer. Some sections may explain explicitly between the three configurations, but have different requirements for each. 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. Motor maintenance scheduled routine care introduction the key to minimizing motor problems is scheduled routine inspection and service.
Perform regular inspections appropriate inspections are at the heart of successful dc unit upkeep. The load angle is almost constant and it is about 90allowing the maximum efficiency. In addition dc generator, dc motor types and applications are. This article describes ac electrical motor troubleshooting. Electric motor maintenance and troubleshooting, second edition explains in detail how all types of ac and dc motors work. 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. Mechanical energy what is an electric motor an electric motor is a device converting electrical energy into mechanical energy usually a torque. For these hours to appear on your certificate, you must. 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. Facilities instructions, standards, and techniques.
Maintenance and troubleshooting of electric motors reliance electric posted 11005 motor maintenance scheduled routine care. They also maintain a strong industrial niche because of the ability to alter the torque to speed ratio exclusive to brushed motors. Page 2 limited warranty motorized products forest river inc. The magnetic field rotation is automatically obtained commutating the active coil through mechanical switches brushes. The commutators are the segmented copper bars on the motors or generators dc side that are connected to the coils of the armature. Electric motor fundamentals free online training program this is a free online training program aiming to enhance your motor knowledge. Onsite diagnostic services, including laser alignment and vibration analysis. 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. Put the top half of the ac motor casing back on the bottom half. Download it once and read it on your kindle device, pc, phones or tablets. Maintenance crews strive to reduce maintenance costs and manage their workloads more effectively.
All operation, maintenance, and repair tasks are to be. 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. This guide provides information on establishing an effective maintenance program to help prevent unexpected motor failures, costly downtime, and unnecessary maintenance costs. Typical inspections when troubleshooting dc motor problems or doing preventative maintenance. Learn the basics of electromagnetic induction, motor selection criteria and proper maintenance techniques. Electric motor system diagnostics richard scott alltest pro, llc. The high cost of the resultant downtime eats deeply into profits. Osburn bureau of reclamation hydroelectric research and technical services group denver, colorado 5f. Maintenance safe maintenance practices performed by qualified personnel are imperative.
Fist 41b, maintenance scheduling for electrical equipment 5c. Lubricate the bearings only when scheduled or if they are noisy or running hot. Before starting maintenance procedures, be positive that. Be sure to read and understand all of the safety notice statements in mn408 or product specific manual. Regular motor maintenance to avoid failure and prolong. These applications include ship propulsion, mine hoists and steel rolling mills.
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 writer created motor repairreplacement decision tree charts while analyzing data from the department of energy doe motormaster software program. The failure of one or more critical motors could cause lost capacity and excessive repair and maintenance cost. Next time you have a dc motor that needs repair, trust york to deliver time and time again. A wellplanned electric motor preventive maintenance programme is the key to dependable, longlife operation of electric motors.
Disconnect power to the motor before performing service or maintenance. Maintenance and troubleshooting of electric motors esr motor. A dc motor must have 100% field strength to produce its maximum torque and to keep the armature amperage within proper limits. From a repair standpoint, dc motors tend to take longer to repair due to their makeup.
Repair and overhaul services motion electric motor services. Inspections give operators visibility of motor unit condition, encourage timely repair and preventative maintenance work, and. The main objective of this kind of maintenance is to repair and replace the motor when a failure occurs. Motordoc llc provides industrial and commercial consulting, training and technology for electrical and mechanical system reliability. Yes, i would like to receive emails from motordoc llc. 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. 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. Electric motor maintenance and troubleshooting, second edition explains. Electric motor predictive and preventive maintenance guide. Maintenance and troubleshooting three phase induction motor. Ac dc motor repair, ranging up to 1,000 hp and weighing up to 20,000pounds. Be sure to read and understand all of the safety notice. In modern plant operations, unscheduled stoppage of production or long repair shutdowns are intolerable. Reactive maintenance or breakdown maintenance as it is referred to as well, does not imply any regular service or tests.
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. Electric motor maintenance and troubleshooting, 2nd edition kindle edition by hand, augie. When repairing an electric motor,is it necessary to know the number of. Electric motor system diagnostics electric motor system diagnostics richard scott alltest pro, llc this session is eligible for 1 contact hour. You are trained and qualified to perform maintenance on this machine.
The following table outlines that difference in each construction, working principles and services needs. 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. Bad elevator dcmotor and generator maintenance youtube. Electric motor maintenance and troubleshooting, 2nd. The program is available from the doe website to help you control your spare motor inventory. 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. They provide the most surface contact since they are worn in. 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.
Use features like bookmarks, note taking and highlighting while reading electric motor maintenance and troubleshooting, 2nd edition. By using these charts 1 for ac motors, 1 for dc motors, you can quickly determine whether your company should either. The manufacturer of these products, baldor electric company, became abb motors and mechanical inc. Simple steps to electric motor maintenance r baker. We are constantly doing what everyone else just talks about. 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. 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. Almost all electrical equipment requires planned inspection and maintenance being carrying out. Disconnect the motor from the electricity supply before proceeding to repair it. Information, editorials and tech tips for you to use. Follow the steps in section 2 to replace the bearings and repair your ac motor. Be sure required safety guards are in place before starting equipment. Including the motors in the maintenance schedule for the driven machine or general plant equipment is usually sufficient. Note before removing dc motor brushes always put the brush back in the same hole of the motor.
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. 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. Abb training abb service for motors and generators. Electric motor predictive and preventive maintenance guide abstract electric motor performance is vital to the reliable and efficient operation of power plants. Today, the brushless motor is far more common than the brushed motor. This ensures electrical equipment is kept in good working condition at all times. Knowing when to perform this maintenance is the key.
Timesaving tips include changing brushes, checking winding insulation with a megohmmeter, and machining commutators in place. Each motor carrier and intermodal equipment provider must systematically inspect, repair, and maintain all commercial motor vehicles cmvs under its control. 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. Do not lift both the motor and driven equipment with the motor lifting means. Dc motor troubleshooting, inspection and learn to repair of dc motor brushes and commutators. Direct current motors remain a viable option in certain applications and someone has to know how to service them. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Brushed dc motors are still used frequently in household appliances and in automobiles. However, existing maintenance recommendations proposed by.
A general guide to dc motor maintenance ohio electric motors. He owned an electric motor repair shop for a number of years, and he taught the electric motor repair course at. However, both can be found in a wide range of applications. Test the shunt field continuity by measuring and recording the resistance of the shunt with an ohmmeter.
This conversion is usually obtained through the generation of a. 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. Smear a little lubricant on your cloth and wipe the area where the bearings were. Electric motor maintenance and troubleshooting, 2nd edition. Inspections give operators visibility of motor unit condition, encourage timely repair and preventative maintenance work, and provide a regular source of.
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