YZR crane motor is suitable for driving all kinds of lifting equipment and metallurgical auxiliary equipment, with high overload capacity and impact toughness, especially suitable for short-term or intermittent operation, frequent start, brake and obvious vibration and impact of the machine.
YZR crane motor has good airtightness, the motor protection grade for general places is IP44, and the motor protection grade for metallurgical places is IP54. YZR series is wound rotor three-phase asynchronous motor, the flame retardant grade of motor is divided into F class and H class. Class F is applicable to general sites with cooling medium temperature not exceeding 40℃; 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 application 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 to cause the motor in the use of low frequency The hair is too hot, affecting the life of the motor, so try to stipulate that users should not 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. The brake shall be synchronized, and early braking will lead to automatic uncoupling, and late braking will lead to frequency converter maintenance.
Braking can not be connected at the output end of the frequency converter, and a contactor shall be added at the input end to receive the oil pump or electromagnet. The contactor can be controlled by the multi-function reporting relay of the frequency converter, but the relay function shall be adjusted to be exported during operation. The specific operational duty cycle rate remains within 40%.
