It can also block the cooling fan, limiting the motor’s ability to regulate its temperature, and increasing the likelihood of overheating. 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. However, this is dependant on proper maintenance - without which they are likely to break down much quicker. Possible solution: Preventing contamination is relatively easy. The motor inventory should be kept dry all the time. Over-Current (Electrical Overload): In different operating conditions, electrical devices will sometimes start to draw more current than their overall capacity. Over Heating Excessive heat in motors can cause a number of performance problems.
Electrical 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. 3. In large buildings, motors have to be maintained on a regular basis because they need to be in operation all the time; one small problem could cause a great loss to the organization.
The Bardenpho Process of Wastewater Treatment leads to better Quality Treated Water. There are six main causes of electric motor failures: These causes are briefly explained below: 1. However, vibration can also be a result of an underlying issue with the motor, such as loose bearings, misalignment, or corrosion. All Rights Reserved. Moisture: Moisture also affects the performance of electric motors. Around 55% of insulating failures in motors occur due to overheating.
It is very important that the motors should be matched with their ideal current values. Proper steps should be taken to prevent the motors from dirt. Overheating causes the motor winding insulation to deteriorate quickly. Contamination from dust, dirt and chemicals is one of the leading causes of motor failure. What is the Biggest USA Naval Aircraft Carrier Now? It can also be a result of short circuited conductors, or an excessive voltage supply. For every ten centigrade rise in temperature, the insulation life is cut in half. If the current is exceptionally low, reconnect for delta and repeat the no-load test. Overheating can be caused by poor power quality, or a high temperature operating environment. Copyright © 2020 Bright Hub PM. This leads to insufficient isolation between the conductors or motor windings, which can cause leakages and short circuits, and eventually motor failure. You should use a specialized stepper motor driver that can handle about 3 amps to give a comfortable margin. 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 more information and solutions, our dedicated couplings and drives division is perfectly placed to offer you expert advice in application design and coupling and drive selection, making sure that your application reaches its full potential. Available for Design & Build services. If vibration still occurs, check for signs of wear, as well as loose bearings or misalignment. In the initial stages of motor installation, the insulation resistance is observed to be more than one thousand megaohms. After some time, the insulation performance starts to degrade at an alarming level because the resistance starts to decay gradually. Designing & building electrical circuits for over 25 years. 2. To avoid an over-current, there are some devices that need to be installed that can prevent it from happening. Whenever a problem occurs, it should be corrected immediately to avoid further loss. These devices are usually wired in the circuits and will automatically shut down the extra amount of current flowing in the circuit.
The alignment of the motor should be checked to eliminate this issue. The 1N4148 diodes are definitely not appropriate for those motors as the maximum repetitive forward current is only 500 mA. Consider contacting a specialist if the source of vibration cannot be identified. This can be caused by a low supply voltage, resulting in the motor drawing in more current in an attempt to maintain its torque. Here's What You Need to Know, 4 Most Common HVAC Issues & How to Fix Them, Fluid Mechanics & How it Relates to Mechanical Engineering, Hobbyist & DIY Electronic Devices & Circuits, Naval Architecture & Ship Design for Marine Engineers. Every electric motor has a design temperature. The most common cause of motor failure, and arguably the most difficult to overcome, is low resistance. It greatly contributes in the corrosion of the motor shafts, bearings and rotors. The area where electric motors are operating must have a proper cooling system and a ventilation system should be there in case the cooling system stops working. Low resistance is caused by the degradation of the insulation of the windings due to conditions such as overheating, corrosion, or physical damage. There are six main causes of electric motor failures: Over-Current; Low Resistance; Over heating; Dirt; Moisture; Vibration; These causes are briefly explained below: 1.
Overheating also occurs when an electric motor is forced to operate in a high temperature environment.
Vibration is often caused by the motor being positioned on an uneven or unstable surface. Vibration: There are a number of possible causes of vibration, such as misalignment of the motor. Get the latest product information and special offers via email.
Vibration can lead to many issues with the motor, and can eventually cause the motor to fail prematurely. You can unsubscribe in one click, and we won’t share your details. Possible solution: The insulation should be regularly inspected for signs of wear, and replaced before low resistance is able to cause failure. Dirt: Dirt is one of the major sources that cause damage to the electric motors. This issue is considered to be the most difficult one to tackle.
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