The YZTD series tower crane is equipped with a multi speed three-phase asynchronous motor, which is specially developed for the power transmission of tower cranes and other construction machinery. It is a variable pole speed regulating three-phase asynchronous motor. This motor has the characteristics of low starting current, high starting torque, strong overload capacity, frequent starting, braking, and forward and reverse rotation. Moreover, the motor is a squirrel cage rotor motor, which adopts a far pole ratio variable pole speed control and wear prone electric brush device, and does not require additional speed control device. Therefore, it has the characteristics of simple structure and easy maintenance. The benchmark working system of a three speed motor is s3-40% for high and medium speeds, s3-25% for low speeds, and s3-40% for high speeds and s3-25% for low speeds. The motor has F-class insulation; Protection level IP44; Cooling method IC411; Installation structure type IMB3; The rated voltage is 380V, the rated frequency is 50Hz, and it can also be used in a 440V, 60Hz power grid. When the motor operates at an altitude of no more than 1000m, an ambient temperature of no more than 40 ℃, and a relative humidity of less than 90%, it can ensure rated operation. If it operates beyond this environment, the output power should be corrected according to the provisions of GB755. The motor's output box is located at the top of the heart machine, which can be conveniently connected to the left and right output lines. At the same time, motors with side output lines can also be provided according to user requirements.  

YZTD series tower cranes are equipped with multi speed three-phase asynchronous motors.