Cable reels are divided into different types. The working principles of different types of cable reels are different. The following is a detailed introduction: Spring drive cable reel Spring drive cable reel uses the energy storage and energy release of springs to realize the retraction and release of cables. When the device moves to release the cable, the cable drives the reel to rotate, and the spring is tightly wound to store energy; when the device moves in reverse, it needs to retract the cable, the spring releases energy, driving the reel to reverse, thereby retracting the cable. Motor drive cable reel The power part and speed regulation part of the motor drive cable reel are borne by the motor and have unique electrical and mechanical characteristics. When the load changes, the operating speed of the motor also changes accordingly, that is, the speed decreases with the increase of the load, and the speed increases with the decrease of the load. Motor drive cable reels include many types, and their working principles have their own characteristics: Magnetic coupled cable reels (constant tension cable reels) The power is amplified by the AC motor through the cycloid pin wheel reducer and then transmitted to the magnetic coupler, and the coupling principle is used to drive the reel to rotate and collect the cable. By adjusting the working state of the magnetic coupler, the cable tension can be adjusted arbitrarily. Suitable for operating distances of 60 meters, it is an ideal device for retrieving and discharging cables for small and medium-power and long-distance mobile electrical equipment. The hysteresis cable reel motor transmits power to the hysteresis coupling, and after deceleration, the amplified torque is transmitted to the reel. The motor always rotates in the direction of retracting the cable. When releasing the cable, the tension generated by the cable must overcome the magnetic coupling force and make the reel run in the opposite direction. However, the cable is subjected to a greater tension during use, which will reduce the service life of the cable. It has been proved that the hysteresis reel is not suitable for long-term work. When the torque cable reel is retracted, the rotating magnetic field of the stator is the same as the rotor rotation direction, and the motor outputs mechanical power; when the cable is released, the rotor rotation direction of the stator is the opposite to the rotor rotation direction, and the motor rotor is in an electromagnetic braking state. In addition, the torque motor has a softer characteristic, and the rotation speed is small when the rotation diameter is large, so it basically maintains constant tension.