SWING MOTOR OF HYBRID EXCAVATOR

摘要

PURPOSE: A swing motor of a hybrid excavator is provided to prevent distortion caused by electromagnetic waves, generated from an electronic brake, using a non-magnetic body. CONSTITUTION: A swing motor of a hybrid excavator comprises a housing(110), a permanent magnet drive unit, an electromagnet core(131), an electronic brake(130), a velocity sensor(140), and a non-magnetic body. The housing has a space and an auxiliary space(112). The auxiliary space is formed on one surface of the space. The permanent magnet drive unit is installed inside the space and has a rotary shaft(121) to be rotated by magnetic force. One end of the rotary shaft is inserted into the center of the electromagnet core. The electronic brake is installed between the electromagnet core and the rotary shaft and has a disk(132). The velocity sensor is installed inside the auxiliary space and detects the velocity and position of the rotary shaft. The non-magnetic body is installed between the rotary shaft and the velocity sensor and prevents signal distortion caused by the magnetic force generated from the electronic brake.