Synchronous traction machines and asynchronous traction machines are two different types of traction machines in the elevator system. They are essentially different in terms of motor type, efficiency, control method, etc.
1. Elevator traction machine type
Synchronous traction machine: The rotor speed of this motor changes synchronously with the grid frequency while using a permanent magnet synchronous motor, which can provide higher efficiency and better control performance.
Asynchronous traction machine: When using an asynchronous traction machine, its operating speed does not change completely synchronously with the frequency of the power grid. The structure of it is simple and the machine costs low. However, the efficiency and control performance of the machine are worse than those of synchronous traction machines.
2. Efficiency and performance
Synchronous traction machine: Due to the use of permanent magnet materials, which reduces energy loss, the synchronous traction machine has higher efficiency and better performance, especially at low speeds and variable speeds. It can still maintain high efficiency under these conditions.
Asynchronous traction machine: The efficiency of the machine is high when working at full load, but it decreases under partial load condition, especially when running at low speed.
3. Different costs
Synchronous traction machine: In relative terms, the initial investment cost is quite high. This is mainly due to the cost of materials and the complexity of the control system.
Asynchronous traction machine: Because the production technology is more mature and the structure of it is simpler, the initial cost will be lower. However the energy consumption of it will be higher than that of the synchronous traction machine.
4. Working principle
Synchronous traction machine: The synchronous traction machine makes the elevator run through synchronous movement between the motor and the traction sheave. The speed of the motor is synchronized with the speed of traction sheave, allowing the elevator running smoothly.
Asynchronous traction machine: The motor speed of asynchronous traction machine is not completely synchronized with the speed of traction wheel. The speed of the traction wheel is usually slightly higher than the speed of the motor.
When choosing a traction machine, you must consider the specific requirements of the elevator, environmental factors, cost and other needs. Only then will you can choose a product which is suitable for your own elevator system.
We have more than twenty years of experience in the field of elevators and escalators. Besides, we are also a elevator traction machine manufacturer and manufacturer in China. If you want to learn more about the elevator motor specifications or you are still confusing about the choice of elevator traction machine, just contact us. We will answer your questions based on your needs and let you choose the product that suits you.
