Cylindrical brushless direct-drive limited stroke linear servo actuator

The cylindrical brushless direct-drive limited stroke linear servo actuator comprises a shell, a linear servo motor, a linear servo motor and a linear servo motor, the stator comprises an iron core and a coil located in the iron core, and a hollow cylindrical cavity is defined by the iron core; the rotor is at least partially positioned in the cavity and can be controlled to linearly move relative to the cavity, the rotor comprises a shaft, and the shaft is provided with a first end extending out of the shell and a closed second end opposite to the first end; the detection device is used for determining the position of the rotor relative to the stator; wherein the detection device comprises a transmitter fixed on the second end of the shaft and a receiver fixedly positioned relative to the stator, the transmitter and the receiver being arranged opposite and spaced apart from each other, and the receiver calculates the position of the mover relative to the stator by detecting the change of the signal of the em