03
2025
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01
Application of Servo Drives in Turnstile Systems
Author:
A turnstile is a passage-management device widely used in subways, railway stations, tourist attractions, office buildings, and other venues to control the entry and exit of personnel. It primarily consists of a housing, a mechanism, a turnstile control board, and various auxiliary components. The mechanism is the core component, responsible for operating the opening and closing of the turnstile’s flap.
Servo drives enable precise control of motor speed, torque, and position. In turnstile systems, they ensure that the opening and closing angles of the flap gates are accurately maintained. For example, in subway turnstiles, it is essential to precisely control the angle at which the flap gates open to facilitate rapid passenger passage while preventing safety risks or operational inefficiencies caused by excessively large or small opening angles. Typically, servo drives can achieve positioning accuracy on the order of millimeters for turnstile flap gates—a level of precision that is difficult to attain with conventional motor drives.
Turnstile gates may require different motion profiles, such as rapid opening, slow closing, or rapid reverse motion in emergency situations. Servo drives can easily implement these complex motion profiles. For example, in high-end office building turnstiles, to prevent people from being trapped, when the system detects someone approaching a closing flap, the servo drive can command the motor to quickly reverse the flap open before slowly closing it again, thereby ensuring passenger safety.
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