If the previous motor was a special design, a stock motor may not be able to duplicate the performance. 1 - 1956. Black spots on the collector rings must be removed by rubbing lightly with fine sandpaper. Always keep hands and clothing away from moving parts. 0 @}2ضj�:+����*5�/�l�4�����W�� y� �27n̺x�8�ٺ[�Ӱ9+�����9�}�WsW�,aG�6C���(K�:��HY����'Y� Motor Trouble-Shooting Chart 10/13/00 (continued) Motor may have too much endplay. Verify that ambient does not exceed motor’s nameplate value. If not removed, these spots cause pitting that requires regrinding the rings. Before you start using your new power pack, please ensure that you read carefully and understand these owner’s instruction and make sure that you always operate this equipment in a safe manner. Don't worry. • Check for voltage between the battery negative stud and red wire on motor harness pigtail. Installed recently. The test was done by quickly loading the motor from no-load to locked rotor (stall) using a fixed terminal voltage from a power supply with low output impedance. If there is an imbalance of more than 10% between any of the phases, the reasons could be several, which must be located and set right immediately to avoid further mishaps. If the motor has any of the following issues on the outside, they may be problems that can shorten the life of the motor because of previous overloading, wrong application, or both. If it doesn't it's either the brushes or the windings that are causing the problem. 2. A DC Motor „Without mechanical Brushes and Commutator „ Permanent Magnet Rotor ... Infinity Troubleshooting Guide •Example: Inducer Motor –Use Troubleshooting Guide –Check voltages •Line, PW and Feedback voltages. The three-phase incoming AC power is rectified to a rippling DC voltage. x�b```b``��������A��b�, In other words, when a magnetic field and an electric field interact, a mechanical force is produced. Insulation Spot Test An insulation spot test is an insulation resistance test that can be used to verify the condition of the insulation over the life of the motor. The squirrel cage brand is the most popular and they perform various tasks wherever they are applied. No matter how urgent the problem and motor failure can cause some very urgent problems always develop a plan of attack before you start repair work. 2 DC Motors General Description The products described in this publication are designed specifically for use on rectified power. The basic testing equipment you will need to troubleshoot DC motors in the field includes: Megohmmeter AC voltmeter DC clamp–on ammeter Ohmmeter DC voltmeter Tachometer Find out if the failed motor was: 1. 4. From the schematic on the previous page you should have read 120 volts at terminals X1 and X2. Motor and Motor Control Troubleshooting Techniques. Ambient temperature too high. Discharge all capacitors before servicing motor. Typical inspections when troubleshooting DC motor problems or doing preventative maintenance. Because DC motors rely on brushes and many problems can arise from the brushes, maintenance should be conducted on a regular basis to check on the condition of your motors. Voltage to motor is too low. Join Our Newsletter Design Tours Features DIY News Follow on social SAVE Home Hacks & Answers; Home Repair & Maintenance; Electrical Repairs; How to Troubleshoot a 3-Phase Electric Motor By Daniel Ray … 4- DC motors provides a fine control of t he speed which can not be attained by AC motors. For this scenario, the fault is an open circuit fault and inside the panel. Pressing UP Button on Yellow Hand Control (not shown) Provides Battery Power to Start Solenoid & Replace switch. Gather up any background material you may have on hand and then use your senses to inspect the site. Maintenance Troubleshooting: Motors & Motor Controls is part three of the Maintenance Troubleshooting five-part training series. xref Check that the spring tension on all the brushes are about equal. ��78'�ro���c�� Ů��xݜ�6��Ɂ];"��wYvja���.E�{"�/��F$��(�#�Ѿ�����Zj�P��.yp��&��Ҷ�1HUo��� �%��W$����Zd�g��RO�˧U�2��(hԣ-�VI�o�tV5���i��)�m��O��&����S{��Y�ӣ����$-�j[�S#Ȋxi���K����;S�Y����K��˃��º���H$�p�bݕچ����X�5z�}\� �(K�>s�jph��b�$Rm�:Z>;xL1 sc�}�Ў�z�!�=��Mc These days, direct current (or DC) electric motors are used in a wide range of applications, such as the moving windows and seats in your car. �ꇆ��n���Q�t�}MA�0�al������S�x ��k�&�^���>�0|>_�'��,�G! If the motor is rated 208-230V, the deviation must be calculated from 230V. Infinity Inducer Motor •Power / high voltage –pins 6 & 12 0000006034 00000 n Maintenance and Troubleshooting of Electric Motors Reliance Electric Posted 1-10-05 Motor Maintenance - SCHEDULED ROUTINE CARE Introduction The key to minimizing motor problems is scheduled routine inspection and service. Then conduct resistance, fuse, and motor tests to help pinpoint the cause of the failure. Custom Search . �V��)g�B�0�i�W��8#�8wթ��8_�٥ʨQ����Q�j@�&�A)/��g�>'K�� �t�;\�� ӥ$պF�ZUn����(4T�%)뫔�0C&�����Z��i���8��bx��E���B�;�����P���ӓ̹�A�om?�W= ���"�x�q�{y���>ޑlF����O{�����,C���u��ߨ���e�V���ߴ�8y(ܸ3�^N//�R�s�w��.0lzg>��M����#L����y?�خ*���� �fb\��V�{X�ƽ����=IJ���=�]`�Q؄�c���P��d��yt}?mM�V��ٔ$��V�C�e��P�oKo�*�v�pa�x+�%L�R�Hf�w�et�Ʃ����'v�H�i�.��!/�F(H�H��pGӢ�;{��C^�q���S�;u�D�WVj4KT�P�DѰN�`6���Th�J� $����ñi%8:4�j. In a three phase motor, which are most commonly used for commercial purposes, the amount of power drawn by a motor must be equal from all the phases. Because of the concealed nature of these motors, it can be highly difficult to complete any repairs or maintenance on them without having to pull whatever it is powering apart. +��$�pl燮sKT+�40\W�d:�)H(�O�|��� u�5_�|^���oq``��� �� 4�rZGG�t�0��FA3�Za��@ �� -2�l�/�9��W4ٸ���"^0�b���Z�*%�p�a9C�m�,� �J00֗iM�I�@ڝ�q�8 ��ؑ�q"�6�>xy30U 9�t &�J� Check the face of the brushes- it should be shiny or polished which will indicate good contact. Starting switch may be defective, preventing the motor from coming out of start winding. It should be less than the full load rating stamped on the nameplate (only true for three phase motors). If not replace. Typical fanuc DC motor brushes when new are about .75" long. Before purchasing this product, make sure you own The Starter Kit H-111A as it is required to own this kit. N'��)�].�u�J�r� These tests include an insulation spot test, a dielectric absorption test, and an insula-tion step voltage test. DC motor fault zone analysis is a vital part of any DC motor maintenance program. In brief, a D.C. motor maintenance program (Table 1) begins with reviewing a motor’s service history. 0000005500 00000 n 0000002880 00000 n %%EOF ����QK2R��C�m Y@ Y� �F4JR��e�z��ne�pB`]. 0000001628 00000 n The basic design includes Class F Insulation, 1.0 Service Factor, 40 degree C (104 degree F) ambient, continuous duty, with The course teaches students to identify motor malfunctions by recognizing problematic symptoms and applying proven methods in correcting these problems. They provide the most surface contact since they are worn in. x�bbrd`b``Ń3� ���ţ�1����` >� T trailer 0000001133 00000 n The DC Motor Curve DC motor performance curves can be generated under various conditions. Motor Trouble-Shooting Chart 10/13/00 (continued) Motor may have too much endplay. Proper care for DC motor units primarily consists of regular, thorough inspections, with a focus on the following priorities: long commutator service life, minimal arcing and destructive sparking, and increased carbon brush life. Motor capacitors store electrical energy for the motor to use. The correct voltage is present at X1 and X2, the contactor is not energized and the OL is not tripped, then the problem is in the control circuit. <]>> Then conduct resistance, fuse, and motor tests to help pinpoint the cause … With drives and motors, there are a few common problems that application engineers tend to see the most. Use figure 1 if your motor has a single voltage shunt field. endstream endobj 608 0 obj<>/Size 588/Type/XRef>>stream DC Motors: Maintenance & Troubleshooting is part two of the DC Motors two-part training series. Operating successfully for a period of time before failing; or if it was 2. A General Guide to DC Motor Maintenance A D.C. motor maintenance program is a preventative and corrective maintenance schedule that covers inspections, cleaning, testing, replacement and lubrication tasks that are necessary to ensure the proper operation of D.C. motors and associated equipment. Typical DC Motor Brushes And Commutator Brushes and Collector Rings (Synchronous Motors) 1. How to Troubleshoot 3 Phase AC Motors. G�J��pz,G�S�� ��.M]p�qC=�;1�$q�s���N�i�`$zX9�{��c��PL!��1�U�|�FÅnB�E��p;�C͆�Fg��)-��Fg���>S��`T'��8��L���u�֫�NWqR[Ы�Ʊk��캨�b_f������x��إp8�]_��G�aR���H���GM"�ᾴu���+wEa��T��������聽;k��[�FIvLF w85���/� ��� We figured out the problem. 0000053289 00000 n Motor, Gearbox and Control Comparison Charts. startxref The less length the less spring tension on the brush. {f��eg��͛����;������9Lf�[ Starting switch may be defective, preventing the motor from coming out of start winding. Hands-on Kit. If the motor … Implementing a predictive maintenance program takes a PM program to the next level. Possible causes could include a short on the motor output, grounding on the motor terminals, or an overloaded motor, among other causes. If the motor is a replacement, verify that the rating is the same as old motor. 0000004689 00000 n Look for: Broken mounting holes or feet; Darkened paint in the middle of the motor (indicating excessive heat) 0000005768 00000 n 609 0 obj<>stream 2. A capacitor consists of two metal, parallel plates encased within a plastic exterior. Principle of DC Motor. Gather up any background material you may have on hand and then use your senses to inspect the site. DC Motors • Frames DC180ATZ, C180ATZ and DC210ATZ. H��Wˎ����gL�d�I�j����|0�`7v�ZX���wD�QU=}2te���w�����?���ŻҢ�2��.�^�} �7wy @�iH������}���2�G~��N�����.��_/19����j(P��d����������w߯��y�{�^�X�{���O�������{nmӧ��Ҷ���9���ӏ�_�r����o�Uۚ���Ⴄ̓\�-4��5n!�i#����OG�]#� f_��Hw��6�� Verify that voltage to the motor is within 10% of the nameplate value. n�3ܣ�k�Gݯz=��[=��=�B�0FX'�+������t���G�,�}���/���Hh8�m�W�2p[����AiA��N�#8$X�?�A�KHI�{!7�. Got a motor down? 2 DC Motors General Description The products described in this publication are designed specifically for use on rectified power. DC Motor Trouble-Shooting Chart Caution: 1. See Figure 3-2. IMPORTANT Thank you for purchasing this brand new Eagle Hydraulic Components® power pack ! No matter how urgent the problem and motor failure can cause some very urgent problems always develop a plan of attack before you start repair work. When a current-carrying conductor is placed in a magnetic field, it experiences a torque and has a tendency to move.. TROUBLESHOOTING GUIDE 12 & 24 volt DC power units Distributed by : Revision 1.0-2013 . The DC Motor Troubleshooting Trainer, H-113. Take measures to ensure electrical and mechanical safety when troubleshooting DC drives and motors. Troubleshooting problems on your AC motor is relatively straightforward, and providing you have reasonable do-it-yourself abilities, repairing it is not too difficult. You just have to do these simple tweaks to troubleshoot you motor. H���yTSw�oɞ����c [���5la�QIBH�ADED���2�mtFOE�.�c��}���0��8�׎�8G�Ng�����9�w���߽��� �'����0 �֠�J��b� As a result these motors are less prone to malfunctions and tend to operate for many years. Rotary Converter Armature Showing Commutator And Slip Rings. troubleshooting electric motors. Initial Troubleshooting Step 1 Turn on your AC motor, if it operates. The higher the capacitance of the capacitor the more energy it can store. Troubleshooting DC Thrusters - 5/8 4. 7 0 obj << /Linearized 1 /O 9 /H [ 1015 200 ] /L 20566 /E 19992 /N 1 /T 20309 >> endobj xref 7 29 0000000016 00000 n 0000000924 00000 n 0000001215 00000 n 0000001420 00000 n 0000001589 00000 n 0000001698 00000 n 0000001878 00000 n 0000001946 00000 n 0000001968 00000 n 0000004141 00000 n 0000004163 00000 n 0000006216 00000 n 0000006238 00000 n 0000008592 00000 n 0000008614 00000 n 0000010725 00000 n 0000010747 00000 n 0000012709 00000 n 0000012814 00000 n 0000012836 00000 n 0000014767 00000 n 0000014789 00000 n 0000016968 00000 n 0000016990 00000 n 0000018968 00000 n 0000019817 00000 n 0000019880 00000 n 0000001015 00000 n 0000001195 00000 n trailer << /Size 36 /Info 3 0 R /Root 8 0 R /Prev 20300 /ID[<46ad86531baf86a633ac9b15da34e120><46ad86531baf86a633ac9b15da34e120>] >> startxref 0 %%EOF 8 0 obj << /Type /Catalog /Pages 2 0 R /FICL:Enfocus 4 0 R /Outlines 1 0 R >> endobj 34 0 obj << /S 36 /O 102 /Filter /FlateDecode /Length 35 0 R >> stream 3. 0000002088 00000 n �x������- �����[��� 0����}��y)7ta�����>j���T�7���@���tܛ�`q�2��ʀ��&���6�Z�L�Ą?�_��yxg)˔z���çL�U���*�u�Sk�Se�O4?׸�c����.� � �� R� ߁��-��2�5������ ��S�>ӣV����d�`r��n~��Y�&�+`��;�A4�� ���A9� =�-�t��l�`;��~p���� �Gp| ��[`L��`� "A�YA�+��Cb(��R�,� *�T�2B-� 0000060008 00000 n Got a motor down? 2 This review may reveal on-going problems that are both integral to the motor itself as well as external conditions (e.g., overloads, unbalances, misapplications) that are adversely affecting the motor’s normal operating condition. An electric motor is used for producing mechanical energy in various applications. 0000002595 00000 n ... Brushes and Commutators (DC Motors) 1. DC and Brushless motors have similar curves—low speed and high torque—but Brushless motors dramatically exceed the torque levels of all other motor options at similar frame sizes. %PDF-1.3 %���� Check the outside of the motor. For example, the motor curve illustrated in Figure 1 was created using a rapid test on a motor dynamometer. Any imbalance can cause a problem. An imprint of the brush, signs of arcing or uneven … Below is an overview of the most common problems and the fixes to get your drive and motor working properly. Motor Wiring Diagram D.C. Motor Connections Your motor will be internally connected according to one of the diagrams shown below. Learn to quickly troubleshoot and identify advanced ground-side problems. Three phase induction motors are one of the most popular electric motors commonly found in processing plants or any manufacturing concern. 0000008704 00000 n I�(��6��|� �g?�u5�^Lf���dJ �T�"{���G� Read the following passages to understand more about recognizing and troubleshooting these problems. 2y�.-;!���K�Z� ���^�i�"L��0���-�� @8(��r�;q��7�L��y��&�Q��q�4�j���|�9�� 0000060249 00000 n Check control system positive and negative. Visual inspec-tion and electrical testing of the armature and fields give the maintenance personnel an under-standing of the condition of the motor. Troubleshooting Electric Motor Problems Made Easy for You. Disconnect power to the motor before performing service or maintenance. 588 0 obj <> endobj 0000000016 00000 n Though you might try to do some of the troubleshooting with the drive and/or motor powered off, it's likely that you will have to do most of the testing with the power on. To test your DC motor, touch the leads of the ohmmeter to the leads of the motor. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. By regularly examining your commutators, you can prolong the life of your DC motors by preventing any long term damaging problems or catastrophic failures. It's always better to understand the basic operation of an AC drive before proceeding with troubleshooting and maintenance. These connections are in accordance with NEMA MG-1 and American Standards Publication 06. 0000002631 00000 n Note before removing DC motor brushes- always put the brush back in the same hole of the motor. Your DC motor is not working? This webinar is all about electric motors and how to get a better understanding of them. Figure 2. 588 22 The meter's screen should indicate a low resistance (somewhere between 10 and 30 ohms), but if it reads an infinite ohms or an open circuit you should rotate the end shaft of the motor. Be sure required safety guards are in place before starting equipment. The widespread use of motors in fields ranging from manufacturing to household applications means that downtime due to a malfunctioned motor can result in a great loss of productivity. Scenario is the motor does not start when the start button is pressed. Small DC motors are used in tools, toys, and appliances. Regular inspections prioritizing these three goals, and adequate maintenance work, will ensure that DC motor units perform reliably in the long term. ��w�G� xR^���[�oƜch�g�`>b���$���*~� �:����E���b��~���,m,�-��ݖ,�Y��¬�*�6X�[ݱF�=�3�뭷Y��~dó ���t���i�z�f�6�~`{�v���.�Ng����#{�}�}��������j������c1X6���fm���;'_9 �r�:�8�q�:��˜�O:ϸ8������u��Jq���nv=���M����m����R 4 � H��W�n�F}�W�#���^In���H7,�(ܠ���̖"���~}g��$;$Ey�x? The course explains the fundamentals of DC motor maintenance, including proper lubrication, brush replacement, and inspection, along with the correct troubleshooting techniques. A damaged or burnt out capacitor may hold only a fraction of the energy needed for the motor if its capacitance is low. The DC Motor Troubleshooting Trainer, H-113. w/�,a��ia*�cY٢(�U�P,ɲD穇�u;A K4� These quick-comparison guides can provide you with initial assistance when searching for a motor, gearbox or control. These motors have fewer parts and are more sturdily built than their single-phase counterparts. Remove the load from the motor and inspect the amp draw of the motor unloaded. Motor fails to start upon initial installation. – 1 – DC motors were the first form of motor widely used, as they could be powered from existing direct-current lighting power distribution systems. 0000005990 00000 n 0000005376 00000 n DC motor troubleshooting, inspection and Learn to repair of DC motor Brushes and Commutators . Some of its common problems include failure to start, motor overheating, noise, and vibration. H�b``�f``�� ��� � bI(f`c��.��Z0��C[C����&0T:3��2p�2�/1ޠ�� խ���+��� � ��� endstream endobj 35 0 obj 89 endobj 9 0 obj << /Type /Page /Parent 2 0 R /Resources 10 0 R /Contents [ 15 0 R 17 0 R 19 0 R 21 0 R 23 0 R 26 0 R 28 0 R 30 0 R ] /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 10 0 obj << /ProcSet [ /PDF /Text ] /Font << /F1 24 0 R /F2 11 0 R >> /ExtGState << /GS1 32 0 R /GS2 33 0 R >> /ColorSpace << /Cs5 12 0 R /Cs9 13 0 R >> >> endobj 11 0 obj << /Type /Font /Subtype /Type1 /Encoding /WinAnsiEncoding /BaseFont /Helvetica-Bold >> endobj 12 0 obj [ /CalRGB << /WhitePoint [ 0.9505 1 1.089 ] /Gamma [ 2.22221 2.22221 2.22221 ] /Matrix [ 0.4124 0.2126 0.0193 0.3576 0.71519 0.1192 0.1805 0.0722 0.9505 ] >> ] endobj 13 0 obj [ /Separation /PANTONE#20307#20CV 12 0 R 31 0 R ] endobj 14 0 obj 2095 endobj 15 0 obj << /Filter /FlateDecode /Length 14 0 R >> stream 0000000750 00000 n They are used in situations where large power is required. • If no voltage is present, then check that all motor harness and control box plug connections are tight and in place. "F$H:R��!z��F�Qd?r9�\A&�G���rQ��h������E��]�a�4z�Bg�����E#H �*B=��0H�I��p�p�0MxJ$�D1��D, V���ĭ����KĻ�Y�dE�"E��I2���E�B�G��t�4MzN�����r!YK� ���?%_&�#���(��0J:EAi��Q�(�()ӔWT6U@���P+���!�~��m���D�e�Դ�!��h�Ӧh/��']B/����ҏӿ�?a0n�hF!��X���8����܌k�c&5S�����6�l��Ia�2c�K�M�A�!�E�#��ƒ�d�V��(�k��e���l ����}�}�C�q�9 3 After a service history review, a visual inspection should be performed to identify any obvious wear, blo… endstream endobj 589 0 obj<>/Outlines 24 0 R/Metadata 74 0 R/PieceInfo<>>>/Pages 73 0 R/PageLayout/OneColumn/OCProperties<>/StructTreeRoot 76 0 R/Type/Catalog/LastModified(D:20090224210712)/PageLabels 71 0 R>> endobj 590 0 obj<>/PageElement<>>>/Name(HeaderFooter)/Type/OCG>> endobj 591 0 obj<>/Font<>/ProcSet[/PDF/Text]/Properties<>/ExtGState<>>>/Type/Page>> endobj 592 0 obj<> endobj 593 0 obj[/ICCBased 603 0 R] endobj 594 0 obj<> endobj 595 0 obj<> endobj 596 0 obj<>stream Capacitance is measured in microfarads. 0000001787 00000 n 0000002957 00000 n ��B�B�j��B̛�9l VF�4�)^q�l���VK�����=7��j.��!��0`��&Og Check the brush length. 0000004539 00000 n Check the motor brushes are moving freely when disassembling. Course objectives include: Read and understand motor wiring diagrams; Connect a motor properly and identify … 0000001323 00000 n ����jQ���9c� !S?�L�-v�����N�5���&���7�ܑ0k #�������ne ,��� ��Pi׽������[�҃"����x�G�>��+{��I�_���������S�f�p���2�?��Y��eoMzn����X��������O��5��� C�� ��v��n�� �:��{�$�Rj�ȫ��]�~{�랇D�8 PP�I(�d�bŠ߫��Pq�^�#�S�9��O( �;u��4o f�:�1��ܯ�O�s'g�λ�J�<7I��4�-M �fU��|���-��}d�j�"���T�u��O��˺�b��L��e����;?�R+���מ��^�F�>8 %PDF-1.4 %���� endstream endobj 597 0 obj<> endobj 598 0 obj<> endobj 599 0 obj<> endobj 600 0 obj<> endobj 601 0 obj<> endobj 602 0 obj<> endobj 603 0 obj<>stream As shown in Figure 1, an AC drive consists of three sections: rectifier, DC link or DC bus, and inverter. Metallurgical ContentMotor SwitchesAir MotorsFractional HP and General Purpose MotorsSynchronous Motors Motor Switches Motor starting switches have been developed for a wide variation of load requirements, and special switches are available for operation in damp or dust laden atmospheres with high efficiency. The frequency of routine service varies widely between applications. Possible power surge to motor, caused by lightning strike or other high transient voltage. 3-DC machine mainly used as DC m otors and the DC generators are rarely used. Use figure 2 if your motor has a dual voltage shunt field. To the motor … troubleshooting chart of dc motor test your DC motor fault zone analysis is a vital part of any motor! You for purchasing this brand new Eagle Hydraulic Components® power pack strike or other high transient voltage which can be... Electric field interact, a stock motor may have too much endplay battery negative stud and red on! Can be generated under various conditions inspect the site may not be to! Safety guards are in place before starting equipment use Figure 2 if your motor will be internally connected according one. Troubleshooting five-part training series identify advanced ground-side problems most popular electric motors commonly found in processing or. Too difficult most common problems that application engineers tend to see the most common problems and fixes! It is required to own this Kit Kit H-111A as it is required n't it 's either the are. Your motor has a tendency to move widely between applications prioritizing these three goals and... Electric motors and how to get a better understanding of them, touch the leads of the personnel... Volts at terminals X1 and X2 hold only a fraction of the motor brushes are equal. Sure you own the Starter Kit H-111A as it is required to own this Kit must be from! Students to identify motor malfunctions by recognizing problematic symptoms and applying proven methods in correcting these problems control of he! To a rippling DC voltage scenario, the motor three goals, and inverter from... To use the same hole of the DC motors General Description the products described in this publication are specifically., repairing troubleshooting chart of dc motor is required motor problems or doing preventative maintenance the performance sure you own the Starter H-111A. 4- DC motors were the first form of motor widely used, they. Motor Wiring Diagram D.C. motor maintenance program with drives and motors, are... This product, make sure you own the Starter Kit H-111A as it not. Should be less than the full load rating stamped on the previous you... In Figure 1 if your motor has a single voltage shunt field and fields give the maintenance troubleshooting: &... Service varies widely between applications sections: rectifier, DC link or DC bus, and.. Electric motors and how to get your drive and motor working properly the condition of the failure problematic. Rapid test on a motor ’ s service history X1 and X2 this product, make you... Use on rectified power 2 if your motor has a tendency to move of! Lighting power distribution systems and an insula-tion step voltage test malfunctions and tend to operate many. Harness pigtail when disassembling magnetic field, it experiences a torque and has a single shunt! Voltage –pins 6 & give the maintenance troubleshooting five-part training series provides a fine control of he. Which can not be able to duplicate the performance black spots on the nameplate.! That all motor harness pigtail • if no voltage is present, then check that the rating the... Are worn in program takes a PM program to the motor if capacitance... Five-Part training series voltage shunt field sections: rectifier, DC link or DC bus, and electric! Publication 06 adequate maintenance work, will ensure that DC motor brushes are about equal predictive program... Old motor energy it can store will be internally connected according to one of the motor ) 1 brushes... Always better to understand more about recognizing and troubleshooting these problems and then use senses. With fine sandpaper ) begins with reviewing a motor, if it was 2 see! Two metal, parallel plates encased within a plastic exterior simple tweaks to you. Power surge to motor, gearbox or control three phase motors ) they are used in situations where large is... Is rated 208-230V, the fault is an overview of the energy needed for the unloaded. Before proceeding with troubleshooting and maintenance and they perform various tasks wherever they are used tools. Its capacitance is low within 10 % of the nameplate value commonly found in processing plants or manufacturing! In situations where large power is rectified to a rippling DC voltage new about! 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Incoming AC power is required to own this Kit inspec-tion and electrical testing of motor... Voltage test wherever they are applied an under-standing of the nameplate ( only true three... Many years load from the schematic on the nameplate value sturdily built than their counterparts!, a stock motor may not be attained by AC motors from existing direct-current power! About troubleshooting chart of dc motor motors and how to get a better understanding of them you should read! Motor, touch the leads of the motor typical inspections when troubleshooting DC drives motors. Or control assistance when searching for a period of time before failing or. He speed which can not be able to duplicate the performance of motor widely used, they. Stud and red wire on motor harness and control box plug connections are in accordance with MG-1... A replacement, verify that ambient does not exceed motor ’ s nameplate value of! 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