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<p>The <a href="https://www.pm-motor.com/products" target="_blank">motor</a> should follow the following reasons when the rated current is exceeded "</p><p>For <a href="https://www.pm-motor.com/products" rel="noopener noreferrer" target="_blank"><strong><a href="https://www.pm-motor.com/products" target="_blank">three-phase motor</a>s</strong></a>, exceeding the rated current during operation should be attributed to the following reasons.</p><p><br></p><p><br></p><p><strong>① Lack of power phase</strong></p><p><br></p><p>If the motor is not equipped with a comprehensive protector, the motor will still run in the absence of phase, and the three-phase current will be seriously unbalanced. At this time, overheating will occur. If a thermal relay is installed, the thermal relay will provide protection to the thermal relay when the protection value of the thermal protection device is reached. If not, it will not take a long time to burn. The solution is to install a comprehensive protector, which will cut off the power immediately when the phase is missing. If there is no integrated protector, at least one thermal relay must be installed. If only the open circuit is used for direct start, it is easy to burn out the <a href="https://www.pm-motor.com/products" rel="noopener noreferrer" target="_blank">motor</a> when a fault occurs during the operation phase.</p><p><br></p><p><strong>② Mechanical failure</strong></p><p><br></p><p>The most common is bearing damage. The bearing is slightly damaged. The <a href="https://www.pm-motor.com/products" rel="noopener noreferrer" target="_blank">motor</a> can still run. If you have no experience, you can turn the bearing by hand. Basically, you will not feel its friction, but the sensitive protector will protect the movement. Be careful with this bearing. Another situation is the imbalance of the rotor, which mainly occurs in the repaired motor, which is caused by the carelessness of the maintenance host.</p><p><br></p><p><strong>③ Overload</strong></p><p><br></p><p>Any device has its range, a certain voltage, a certain current, and a certain power.</p><p><br></p><p><strong>④ Poor heat dissipation</strong></p><p><br></p><p>The motor must have sufficient ventilation and heat dissipation. Due to the narrow design space of the equipment, the ventilation and heat dissipation of the motor are usually very poor. This situation is often encountered, especially for customized non-standard products.</p><p><br></p><p><strong>⑤ Short circuit or open circuit between coil turns</strong></p><p><br></p><p>In this case, ask others to perform repairs. The common phenomenon is that the speed of the <a href="https://www.pm-motor.com/products" rel="noopener noreferrer" target="_blank">motor</a> is slow and weak, and the heat generated is very fast, and there is occasional buzzing.</p>
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