However, vibration can also be a result of an underlying issue with the motor, such as loose bearings, misalignment, or corrosion. Vibration is often caused by the motor being positioned on an uneven or unstable surface. Vibration can lead to many issues with the motor, and can eventually cause the motor to fail prematurely. Also, when laying out the workspace, try to position motors away from grinding machines which produce large amounts of contaminants. Keep work areas, tools and fixtures as clean as possible to help eliminate the chance of contamination entering the motor. Possible solution: Preventing contamination is relatively easy. It can also block the cooling fan, limiting the motor’s ability to regulate its temperature, and increasing the likelihood of overheating. Foreign bodies which find their way inside the motor can dent bearing raceways and balls, leading to high levels of vibration and wear. ![]() ContaminationĬontamination from dust, dirt and chemicals is one of the leading causes of motor failure. Possible solution: It is critical that the motor is kept as cool as possible, ensuring the operating environment is kept cool if possible will help prevent breakdowns. For every 10oc that the temperature of a motor rises, the insulation life reduced by 50%. Overheating can be caused by poor power quality, or a high temperature operating environment. Over-HeatingĪround 55% of insulating failures in motors occur due to overheating. Possible solution: The insulation should be regularly inspected for signs of wear, and replaced before low resistance is able to cause failure. This leads to insufficient isolation between the conductors or motor windings, which can cause leakages and short circuits, and eventually motor failure. Low resistance is caused by the degradation of the insulation of the windings due to conditions such as overheating, corrosion, or physical damage. The most common cause of motor failure, and arguably the most difficult to overcome, is low resistance. Possible solution: Electrical overload can be prevented by installing effective over-current protection which will detect overcurrent and interrupt supply. It can also be a result of short circuited conductors, or an excessive voltage supply. This can be caused by a low supply voltage, resulting in the motor drawing in more current in an attempt to maintain its torque. ![]() Electrical OverloadĮlectrical overload or over-current is caused by an excessive current flow within the motor windings, exceeding the design current which the motor is able to carry efficiently and safely. See our full range of electric motors here 1. Understanding the top five causes of motor failure, as well as the steps that can be taken to reduce the risk of these failures occurring will give your motor the best chance of achieving its maximum possible service life. However, this is dependant on proper maintenance - without which they are likely to break down much quicker. All electric motors have their predetermined life span, typically ranging from 30,000 to 40,000 hours.
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