Different Motors for Automatic Revolving Doors -TSTC

There are mainly 3 types of motors for automatic revolving doors like TAR200, TAR300, TAR600 from TSTC Automatic Doors, they are Brushed Motor, Brushless DC Motor(BLDC) and Permanent Magnet Synchronous Motor(PMSM) . Their advantages and disadvantages will be showed as below .

1. Brushed Motor

1-1 Advantages

▪ Simple structure and low cost; compatible with universal controllers.

▪ Easy control logic, sufficient low-speed torque and simple commissioning.

▪ Widely available spare parts and easy maintenance.

1-2 Disadvantages

▪ Prone to carbon brush wear, short service life and regular replacement required.

▪ High operating noise and strong electromagnetic interference.

▪ Low energy efficiency and high heat generation; poor performance for long-duration continuous operation.

2. Brushless DC Motor(BLDC)

2-1 Advantages

▪ No carbon brush wear, long service life and nearly maintenance-free.

▪ Higher energy efficiency, low heat generation, stable operation and low noise.

▪ Weak electromagnetic interference and high operational reliability.

▪ High overall cost performance, the mainstream choice for commercial automatic doors.

2-2 Disadvantages

▪ Requires dedicated drive controller, higher total cost than brushed motors.

▪ Complex control system, requiring professional skills for repair and commissioning.

▪ Inferior low-speed performance and dynamic response compared with permanent magnet synchronous motors.

3. Permanent Magnet Synchronous Motor (PMSM) 

3-1 Advantages

▪ Top-level energy efficiency with outstanding power-saving performance.

▪ High torque at low speed, smooth start & stop and ultra-low noise.

▪ High power density and compact size; support direct drive design without gearbox.

▪ High control precision and fast response, ideal for high-end intelligent equipment.

▪ Minimal mechanical loss and excellent durability.

3-2 Disadvantages

▪ Highest total cost for motor and supporting servo system.

▪ Complicated control algorithms with high requirements for electronic control technology.

▪ Risk of demagnetization and slight performance degradation under high temperature.

▪ Poor versatility of spare parts and difficult maintenance.

4. Selection Guide

▪ Low-end basic doors: Brushed motor .

▪ Mid-range commercial revolving doors: BLDC motor .

▪ High-end buildings & landmarks: PMSM motor .