Automatic door machine

- Jun 05, 2017 -

Automatic door machine is installed on the top of the car, it is driving the car door opening and closing, but also through the mechanical linkage mechanism to drive the door and car door synchronization opening and closing. In order to make the elevator door in the process of opening and closing to achieve fast, stable requirements, must be automatic door machine system speed adjustment. When using a small DC servo motor, the resistor series and parallel method can be used. When using a small AC torque motor, the commonly used eddy current brake speed control method. DC motor speed control method is simple, less heat when the low speed, AC door machine at low speed when the motor heat, the three-phase motor stall performance and insulation requirements are higher.