The earth permanent magnet motor is a new type of motor that appeared in the early days. Because it has many advantages, it is used by people from all walks of life in various fields. In particular, earth permanent magnet motors are more commonly used in elevators. Let’s take a look at some of its advantages in elevator applications!
Elevator motors usually use earth permanent magnet motors, mainly because this motor is easy to make with low speed and high power. It has a compact structure and complete functions. It integrates a traction motor, a traction wheel, an electromagnetic brake and a photoelectric encoder. It is easy to install and use.
Rare earth permanent magnet motors are especially used in the development and application of machine room-less elevators. The permanent magnet synchronous traction motor is installed in the elevator shaft, which not only saves the construction cost of the machine room, but also beautifies the appearance of the building.
When the elevator load changes, the earth permanent magnet synchronous motor adapts by adjusting the included angle, and its response speed is very fast.
In order to ensure that the elevator has good starting, braking comfort and leveling accuracy, an accurate rotor position device and a voltage and current detection device are added to the system, so that the size and direction of the motor's magnetic field can be determined at any time.
The position detection device uses a rotor position sensor (photoelectric encoder or resolver, etc.). The car load detection device can adopt various forms such as position type, pressure type, etc., to pre-measure and calculate the elevator load, give the appropriate direction and size of torque, and can output switching quantities, analog quantities (voltage) and frequency quantities (high Frequency has strong anti-interference and can be transmitted over long distances), etc.
The advantages of earth permanent magnet motors in elevator applications are mainly reflected in the following aspects:
1. Simple and compact structure, less maintenance, high safety and reliability.
2. It has low noise pollution to the environment, no grease pollution, and can improve the power factor. It is an ideal environmentally friendly product.
3. It can improve the efficiency of mechanical transmission, is energy-saving and economical to use, and has a high cost performance.
4. Compared with the AC gearless asynchronous motor drive system, the earth permanent magnet motor has the advantages of low speed, rapidity, hard mechanical properties and self-closing during parking. It is incomparable to the asynchronous motor.
5. Compared with the DC gearless motor drive system, it has higher low-speed performance, speed regulation accuracy, fast response performance, long life, less power consumption, and simple maintenance.
6. In addition, the earth permanent magnet motor is also easy to realize the ideal drive model of low speed and high torque elevator.
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