YZR crane motor is suitable for driving all kinds of lifting machinery and metallurgical auxiliary equipment, with high overload capacity and mechanical strength, especially suitable for short-term or intermittent operation, frequent start, brake and significant vibration and impact equipment.
YZR crane motor has good sealing, the motor protection level for general places is IP44, and the motor protection level for metallurgical places is IP54. YZR series is wound rotor three-phase asynchronous motor, the insulation class of motor is divided into F class and H class. Class F is suitable for general places where the cooling medium temperature does not exceed 40 ° C; Class H is suitable for metallurgical places where the cooling medium temperature does not exceed 60 ° C, and the two motors have the same parameters.
In theory, YZR lifting motor is not suitable for the use of inverter drive, but if you must use frequency conversion, you can short-circuit the rotor of the motor, but it is also possible because the rotor resistance is too small and cause the motor in the use of low frequency The heat is too large, affecting the life of the motor, so try to ask the user not to use the low frequency gear for a long time.
YZR lifting motor is a special motor for lifting metallurgy, temporary load rate of 40%, can be controlled by frequency converter, but pay attention to: The rotor should be short-circuited, and the wiring should be on the rotor, not through the carbon brush. Braking shall be synchronized, and automatic unhooking will be caused in advance, and frequency converter protection will be caused in delay.
Braking can not be connected at the output end of the frequency converter. A contactor shall be added at the input end and then connected to the oil pump or electromagnet. The contactor can be controlled by the multi-function alarm relay of the frequency converter, but the relay function shall be adjusted to output during operation. The actual operating duty cycle is also controlled within 40%.
