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  • Coal Crusher Electric Motor Rotor Case Study YouTube

    13.02.2017· A midwest based coal fired power generation company that had experienced multiple failures on a 800HP 890RPM 4000V coal crusher motor came to HECO to solve the root cause.

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  • Cause and analysis of stator and rotor failures in three

    The squirrel cage induction motor has limitations, which, if exceeded, will result in premature failure of the stator or rotor. The authors identify the various causes of stator and rotor failures. A specific methodology is proposed to facilitate an accurate analysis of these failures. Failures of the bearings and lubrication systems are

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  • Explaining Motor Failure EC&M

    Most motor failures are caused by a combination of various stresses that act upon the bearings, stator, rotor, and shaft. If these stresses are kept within the design capabilities of the system, premature failure shouldn't occur. However, if any combination of the stresses exceeds the design capacity, the life of the system may be drastically reduced and catastrophic failure could occur.

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  • disassembly of rotor crusher

    Electric motor fault often affects production when crusher is running, Fault Maintenance of Motor Stator & Rotor Core: Checking after disassembly Request Quotation. Counterattack hammer crusher machine. and only when the rotor needs replacement or overhaul disassembly of the rotor, such as routine maintenance, Request Quotation. The productivity of an impact crusher is

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  • DETECTING STATOR AND ROTOR WINDING FAULTS IN THREE

    on-line fault detection when applied to three-phase induction motors, spc:cifically to test known theoretical calculations of harmonics developed by certain types of faults experimentally.

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  • The 50 Failure Modes of Electric Motors UE Systems

    Motor stator failure modes emerge from physical damage, contamination, corrosion, high temperature, voltage imbalance, broken supports and rewind burnout procedures. A lot of times, these can emerge from motor repair shops. Stator failures occur due to the rewind burnout of the windings.

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  • Failures in Three-Phase Stator Windings EASA

    Failures are shown here to help identify the causes of failure, so that, where possible, preventative measures may be taken. Winding single-phased (wye-connected) A single-phased winding failure is the result of an open in one phase of the power supply to the motor.

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  • Crusher vibration problem AMP Maintenance Forums

    Hi, Thanks for the reply.Spectrum before hammer replacement shown the dominated/greater vibration only at 1X rpm of motor in both NDE & DE bearing of motor and 2X,3X amplitude were about lesser 2mm/sec.There was no looseness at all in motor base & bearing and belt was not removed so far.This is crusher A.Let us keep away this discussion for some time.

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  • Common Causes for Electric Motor Failure Motor Failure

    21.07.2010· Most of the electric motor failures occur at the start up. Most of them are caused by the over-heating of motor. There are also other factors which greatly affect the performance of electric motors such as low resistance, dirt, moisture, over-current and vibrations. Electric motors should be installed very carefully and should be looked after at regular intervals.

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  • Stator and Rotor Faults Diagnosis of Squirrel Cage Motor

    Nowadays, stator current analysis used for detecting the incipient fault in squirrel cage motor has received much attention. However, in the case of interturn short circuit in stator, the traditional symmetrical component method has lost the precondition due to the harmonics and noise; the negative sequence component (NSC) is hard to be obtained accurately. For broken rotor bars, the new added

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  • Cause and analysis of stator and rotor failures in three

    The squirrel cage induction motor has limitations, which, if exceeded, will result in premature failure of the stator or rotor. The authors identify the various causes of stator and rotor failures. A specific methodology is proposed to facilitate an accurate analysis of these failures. Failures of the bearings and lubrication systems are

    Details >
  • disassembly of rotor crusher

    Electric motor fault often affects production when crusher is running, Fault Maintenance of Motor Stator & Rotor Core: Checking after disassembly Request Quotation. Counterattack hammer crusher machine. and only when the rotor needs replacement or overhaul disassembly of the rotor, such as routine maintenance, Request Quotation. The productivity of an impact crusher is

    Details >
  • Different Types of Fault in Three Phase Induction Motor

    Rotor Mass Unbalance Fault: If we concentrate on the construction of induction motor then we can easily know that the rotor of induction motor is placed inside stator bore and it rotate coaxially with stator. In heavy motors it is centrally aligned with stator and its axis of rotation are also same with the geometrical axis of stator. So the air gap between inner of the stator and outer of the

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  • How to Effectively Avoid the Imbalance of the Impact

    Long-term working under harsh conditions can increase bearing wear on the impact crusher rotor. With the current technical level, once the rotor fails to work, the cost of repair and replacement could be terribly high, and the production will suffer serious losses, too. Therefore, in the daily operation, we must keep our eyes on maintenance.

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  • 800HP Crusher Electric Motor Repair Case Study

    Todd A. Hatfield Vice President of Engineering & Repair, HECO. This is an electric motor repair case study on a 800HP, 900RPM, 4000V Coal Crusher Motor for a Midwest-US based coal fired power generation plant.In 2006 the utility came to HECO after years of repetitive failures circling around the electric motor's rotor.

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  • Diagnostics of Rotor and Stator Problems in Industrial

    Appendix E. Test Results of Induction Motor Broken Rotor Bar Fault 131 Page v. Page vi. Abstract In this project, two kinds of induction motor faults, stator short circuit fault and bro-ken rotor bar fault, are investigated by using motor current signature analysis (MCSA) and zero crossing time (ZCT) method. These methods are based on the detection of sidebands around the supply frequency in

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  • Diagnosing Rotor Bar Issues with Torque and Current

    Luckily, very few rotor bar defects lead to catastrophic motor failure. All of the data analysis methods described in this article have trendable indicators. Trend the relative amplitudes for motors, compare these results to other motors of the same design, and make a educated decision that is practical concerning motor criticality. The presence of broken bars will cause an increase in overall

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  • DETECTING STATOR AND ROTOR WINDING FAULTS IN THREE

    on-line fault detection when applied to three-phase induction motors, spc:cifically to test known theoretical calculations of harmonics developed by certain types of faults experimentally.

    Details >
  • Crusher vibration problem AMP Maintenance Forums

    Hi, Thanks for the reply.Spectrum before hammer replacement shown the dominated/greater vibration only at 1X rpm of motor in both NDE & DE bearing of motor and 2X,3X amplitude were about lesser 2mm/sec.There was no looseness at all in motor base & bearing and belt was not removed so far.This is crusher A.Let us keep away this discussion for some time.

    Details >

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