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Door Operator


 【elevator door operator function】 

The elevator door operator opens and closes the doors to an elevator at every level all the time. It consists of a motor on top of the elevator that turns gears. The gears are attached to lever arms inside the doors. The motor will open and close the doors regularly.

Elevator door operator, which is a responsible for the elevator hall car door opening and closing institution, when the elevator opened, closed signal, the elevator door operator through the built-in control system control to open the door motor, the motor torque into a certain direction of force, close or open the door. When the closing force of the door is greater than 150N, the door operator will automatically stop closing the door and reverse open the door to play a certain degree of closing protection.

The technology of door operator has experienced the development of mechanical door operator, frequency conversion door operator and permanent magnet synchronous door operator.

【Causes of mechanical failure for elevator door operator】 

The elevator door operator opens and closes all the time, which makes it one of the most frequent mechanical failure on an elevator, and Repairs are time-consuming, always put the elevator out of service for a while. Every time the door opens and closes the parts are worn further.

Most common faults for elevator door operator

1.The door fails to open or close fully.
2.The door hits people as they enter or exit.
3.The electric contact indicates that the door is closed when it’s not.
4.The door doesn’t cycle completely.
5.The door continues to cycle when it shouldn’t.
6.The electric safety circuit doesn’t acknowledge that the door is closed even when it is.

Product Type

Brand Elevator Door Operator Type Model
Selcom elevator center opening two panel operator SJ-MVY-211
elevator center opening two panel operator (Car Frame installation) SJ-MP-211
Wittur  elevator two panels center opening SJ-ECO-02/C
elevator two panels VVVF center opening SJ-OSCAR-02/C
elevator two panels telescopic center opening SJ-OSCAR-12/L-R
Mitsubishi  elevator 2-panel center opening VVVF SJ-XEK-9015(60)
elevator 2-panel opening permanent magent SJ-XEK-9013(60)
elevator 2-panel center opening VVVF SJ-XEK-9011(60)


Frequency conversion operator


Ac asynchronous frequency conversion door operator is usually referred to as frequency conversion door operator for short. There are two kinds of motion control modes of elevator: speed switch control mode and encoder control mode.
Speed switch control method cannot detect the movement direction of the car door, position and speed, can only use position and speed open-loop control, lead to relatively poor control accuracy and the smoothness of movement process of the crane is not so good, so use more encoder control mode .


Permanent magnet synchronous door operator


Compared with the frequency converter, the PMSM upgrades the ac asynchronous motor to the PMSM. Permanent magnet is a way of motor excitation; frequency conversion is the control way of motor speed change. That is to say, the frequency conversion door operator emphasizes that the control part of the door operator is the frequency conversion control, while the permanent magnet synchronous door operator emphasizes that the door operator motor is the permanent magnet motor. Variable frequency technology and permanent magnet synchronous technology are complementary.

Product Benefit

Most door operators are universal, working on all brands and styles of elevators
1.Ensures that the door is fully open or fully closed as needed
2.Prevents the door from trying to close a people are walking through it
3.Keeps the door from cycling repeatedly
4.Allow the door to cycle completely
5.Is much safer by ensuring the door is fully closed while the elevator is in motion

elevator door operator for an elevator modernization

When you do an elevator modernization, you can retain the door operator. This will save on your elevator modernizations since you won’t need to buy the upgraded version with the new elevators. In the meantime, you’ll get the safety and convenience of a new door operator with fewer service calls and higher reliability.

1) VVVF door operators controlled by the brand inverter.
2) Door opening way:center opening and side opening.
3) Door opening width:600-2200mm,height:2000 or 2100mm.
4) Door panels and sill are available as request.