During the operation of various motor – driven equipment, motor stalling is a common and tricky issue. It not only affects the normal operation of the equipment but may even cause damage to the equipment in severe cases. Here are some key points for dealing with motor stalling problems.
Check the Load Condition
In many cases, motor stalling is caused by excessive load. When the load exceeds the rated torque of the motor, the motor has difficulty maintaining its normal rotational speed, and stalling occurs. Carefully inspect the mechanical components driven by the motor to see if there are any situations such as jamming, blockage, or damage to the mechanical structure that increase resistance. For example, in a fan motor, if the fan blades are entangled by foreign objects, the rotational resistance will increase, leading to stalling. Cleaning foreign objects and repairing damaged mechanical components to ensure that the load is within the normal range that the motor can bear can often effectively solve the stalling problem.
Troubleshoot Power Supply Issues
A stable power supply is the basis for the normal operation of the motor. Both low voltage and unstable current can cause the motor to stall. Use a professional voltage – current meter to detect whether the input voltage and current of the motor meet its rated parameters. If the voltage is too low, it may be due to a long power supply line and a thin wire diameter, resulting in a large voltage drop in the line. In this case, it is necessary to consider replacing the wire with a thicker one or shortening the power supply distance. If the current is unstable, it may be a problem with the power supply itself. You can try replacing the power supply module with a reliable one to ensure that the motor can obtain a stable and sufficient power supply.
Detect Internal Motor Failures
Internal failures of the motor are also important causes of stalling. Check whether there are short – circuit or open – circuit conditions in the motor windings. A short – circuit in the windings will cause the motor current to increase abnormally, resulting in severe heating and stalling of the motor; an open – circuit will prevent the motor from forming a complete rotating magnetic field and operating normally. In addition, the wear of the motor bearings cannot be ignored. Severely worn bearings will increase the friction during the motor’s operation, leading to stalling. By using professional tools to detect the resistance of the windings and promptly replacing the damaged windings and worn bearings, the motor can be restored to normal operation.
Review Control Parameters
For motors whose rotational speed is adjusted by a control system, improper setting of control parameters can also cause stalling. For example, in some speed – regulating motors, unreasonable setting of PID control parameters will cause deviations in the motor’s speed regulation, resulting in stalling. Refer to the technical manuals of the motor and the control system, recalibrate and optimize the control parameters so that the control system can accurately adjust the motor speed according to changes in the load and avoid stalling.
To deal with motor stalling problems, it is necessary to start from multiple aspects, carefully check each possible cause, and take targeted measures to ensure the stable operation of the motor and the normal operation of the equipment.