Suppliers of frequency converter braking units remind you that with the continuous improvement of industrial automation, the role of frequency converters is becoming increasingly important. Below is a brief introduction to the many benefits of using a frequency converter:
Firstly, a cage type induction motor that is inexpensive and easy to maintain is used. Moreover, the original induction motor can be directly used without the need to modify the machinery and drive system, improving mechanical functionality.
2. Can perform continuous and extensive operations. When using the existing commonly used power supply, use another variable speed device (reducer, drive belt, etc.) to change the speed. However, it can only perform phased shifting and cannot perform continuous shifting.
3. A frequency converter can replace a DC engine, in which case an induction motor is used. Similar to DC engines, it does not require brushes, slip rings, etc., and has excellent maintainability and environmental resistance.
4. The frequency converter can be soft started and soft closed, and the acceleration/deceleration time of the engine can be adjusted arbitrarily.
5. Reduce the starting current. By using the soft start and soft stop of the frequency converter, the starting current can be reduced to 1.5 to 2 times the rated current when the motor starts. When starting directly, a starting current of 6 times the rated current flows, which will cause a load on the frequent operation/stop of the motor.
6. The rebound braking of the frequency converter facilitates electric braking.
7. One frequency converter can run in parallel to control several engines.
8. High operational efficiency.
9. Using frequency converters in ventilation fans, water pumps, etc. can save energy; Used for air conditioning equipment, it can create a comfortable environment.
10. It can operate at high speeds above the rated current of the engine.
11. Use optimal speed control to improve quality.
Due to different functions of electrical appliances in different industries, the function of the frequency converter used will also vary. When selecting the frequency converter configuration, it is necessary to fully grasp the load characteristics.
1. Confirm the characteristics of the load such as load type, speed, and nature;
2. Confirm whether it is a continuous operation, long-term operation, short-term operation and other operating characteristics;
3. Confirm the maximum consumption output value and rated output value;
4. Confirm the maximum number of rotations and rated number of rotations;
5. Confirm the speed control range;
6. Confirm changes in load, current, voltage, frequency, temperature, etc;
7. Confirm the required control precision;
8. Confirm the braking method;
9. Vérifiez la configuration de l'alimentation. Autrement dit, la capacité est sélectionnée en fonction de facteurs tels que les caractéristiques de couple en fonction de la vitesse, la capacité de surcharge, la durée nominale, le couple de démarrage, la valeur de puissance nominale, le mode de fonctionnement, le mode de contrôle, le nombre de tours par minute, le rendement, etc.
Cependant, choisir la configuration du convertisseur de fréquence de cette manière n'est pas chose aisée. C'est pourquoi les utilisateurs peuvent généralement choisir un convertisseur de fréquence en fonction de la configuration du moteur. Il faut d'abord sélectionner la tension de configuration (220 V, 380 V ou 440 V), puis choisir la capacité du convertisseur de fréquence en fonction de la puissance du moteur (kW). En général, les produits à faible couple de démarrage et faible capacité de charge, tels que les ventilateurs et les pompes à eau, utilisent des moteurs et des convertisseurs de fréquence de capacité équivalente (rapport 1:1). Pour les ascenseurs, les grues et autres appareils nécessitant des couples importants et des charges élevées, il convient de choisir un convertisseur de fréquence dont la capacité est supérieure d'un étage à celle du moteur.