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Analysis of the causes of three-phase AC motor burnout
source：未知 time：2024-11-21 10:13nbsp; click：
Analysis of the causes of three-phase AC motor burnout, the causes of three-phase AC motor burnout can be divided into load, power supply, motor insulation, and phase loss.
Three-phase AC motor load (overload) burnout: The motor heats up under overload operation. Or the motor is started frequently and overheated. When both ends of the stator are burned inside the motor and the burned parts become uniform (generally speaking, the motor has a constant operating power, called the rated power, in watts (W), and in some cases when the actual power used by the motor exceeds the rated power of the motor, this phenomenon is called motor overload. Reasons for the lighter power supply of the three-phase AC motor: the voltage is too low, the current becomes larger when the load is rated, and the motor overheats. The power supply voltage is too high, and the barbecue machine is burning. Or the motor is running in a missing phase. This situation is relatively rare and easy to judge. It is mainly caused by burn marks on the line. Three-phase AC motor insulation reasons: the internal insulation of the motor does not meet the standards, and there is a phase-to-phase short circuit between turns.
Or the internal wiring is wrong. This barbecue machine is sometimes easily confused with an overload barbecue machine, and the stator will also burn out, but there are obvious burn marks on the short-circuit part, such as copper molten ore sometimes. The winding part is burned badly. The reasons for the burning of the three-phase AC motor are: 1. The motor adopts the delta connection method, only one phase of the winding can be burned, and the insulation damage of one phase of the winding to the ground can be measured with a megohmmeter. 2. The motor adopts the star (y) connection method, and two phases of the winding are burned. The insulation damage of the two phases of the winding to the ground can be measured with a megohmmeter (clock).
Or the internal wiring is wrong. This barbecue machine is sometimes easily confused with an overload barbecue machine, and the stator will also burn out, but there are obvious burn marks on the short-circuit part, such as copper molten ore sometimes. The winding part is burned badly. The reasons for the burning of the three-phase AC motor are: 1. The motor adopts the delta connection method, only one phase of the winding can be burned, and the insulation damage of one phase of the winding to the ground can be measured with a megohmmeter. 2. The motor adopts the star (y) connection method, and two phases of the winding are burned. The insulation damage of the two phases of the winding to the ground can be measured with a megohmmeter (clock).
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