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Common faults and solutions of hydraulic lifting platform motors

by:Powerston     2021-08-18
Common faults of hydraulic lifting platform motors and their solutions. Hydraulic lifting platforms inevitably have various faults during use. The common ones are hydraulic lifting platform motor faults. The main causes of motor failures are the overheating of the motor and the overheating of the motor due to the power supply. In order to allow users to better use the equipment to avoid affecting their work, the following explains the causes and solutions of the failure in detail. 1. Reasons for the motor overheating when the hydraulic lifting cage platform is connected to the power supply: 1. When the power supply voltage is too high When the power supply voltage of the hydraulic lifting platform is too high, the motor back electromotive force, magnetic flux and magnetic flux density will increase accordingly. Since the size of the iron loss is proportional to the square of the magnetic flux density, the iron loss increases, causing the core to overheat. The increase in magnetic flux also causes the component of the excitation current to increase sharply, resulting in increased copper loss in the stator winding and overheating of the winding. Therefore, when the power supply voltage exceeds the rated voltage of the motor, the motor will overheat. When the hydraulic lifting platform is connected to the power supply, the motor is overheated. 2. When the power supply voltage is too low, if the power supply voltage is too low, if the electromagnetic torque of the motor remains unchanged, the magnetic flux will decrease, the rotor current will increase correspondingly, and the load power component of the stator current will follow The increase of this will increase the copper loss of the winding and cause the stator and rotor windings to overheat. 3. Asymmetry of power supply voltage. When one phase of the power line is open, the fuse is blown, or the corner of the knife starting device is burned and one phase is blocked, it will cause the three-phase motor to go single-phase and cause the running two-phase winding to pass large currents. And overheating, and even burnt. 4. Unbalanced three-phase power supply When the three-phase power supply is unbalanced, the three-phase current of the lifting platform motor will be unbalanced, causing the winding to overheat. It can be seen from the above that when the motor is overheated, the power source should be considered first. After confirming that there is no problem with the power supply, then consider other factors. The hydraulic lifting platform load causes the motor to overheat. 2. The hydraulic lifting platform load causes the motor to overheat: 1. Motor overload operation. When the hydraulic lifting platform equipment is not matched and the load power of the motor is greater than the rated power of the motor, the motor will be overloaded for a long time (ie Small horse-drawn cart) will cause the motor to overheat. When repairing an overheated motor, you should first find out whether the load power is consistent with the motor power to prevent blind disassembly. 133.
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