Mining industry solutions
The application of Odeli frequency converter in coal mine fans
The application of frequency converter energy-saving technology in coal mining machinery and equipment is beneficial for reducing energy consumption and improving coal mine production efficiency. Odeli Technology has a deep understanding of various coal production processes, and we have rich experience in transformation. By applying our products, coal mine production can be guaranteed to be more efficient, energy-saving, and stable.
Problems with coal mining machinery and equipment:
1. Serious waste of electrical energy
2. Difficulty starting, severe mechanical damage
3. Low degree of automation
Application of frequency converter effect:
*Energy saving effect: The Odeli frequency converter is used in the main ventilation fan to control the wind speed, effectively changing the output of air volume and pressure, achieving the goal of energy conservation.
*Can achieve overload start, meeting the requirement of no manual restart after shutdown;
*The low starting current has a low mechanical impact on the equipment, effectively solving the problem of frequent chain breakage accidents during use; Improved the service life of the equipment;
*Excellent master-slave control function, achieving power balance of the motor;
*Equipped with low-speed maintenance mode and forward/reverse control mode, facilitating equipment maintenance and handling of blockages.
The results indicate that the use of Odeli frequency converters for speed regulation and energy-saving transformation of coal mine main ventilation equipment has good social and economic benefits. The automation level of coal mines has been further improved, and the production process of coal mines is safer and more reliable.
The application of soft starter in coal mines
Soft starters are suitable for various pump and fan loads that require soft starting and soft stopping underground, replacing traditional star delta, reactor, self coupling voltage reduction, and dual speed motor starting.
The characteristics of soft start in coal mine use are:
(1) Small in size, easy to install, maintain, and repair.
(2) The starting parameters of soft starters in coal mines are mostly set to current limiting mode, which can be set to different starting currents according to different loads. During the startup process, the impact on the power grid is small, which improves the reliability of power supply, reduces mechanical impact, and extends the service life of the machinery.
(3) When starting a large load underground, such as a belt conveyor or scraper with coal pressure, the starting parameters should be set to jump starting mode. After troubleshooting, the starting parameters should be set to current limiting mode.
(4) The soft stop function of the soft starter is to smoothly slow down the motor and gradually stop it, which can overcome the drawbacks of instantaneous power outage and reduce the impact on heavy-duty machinery. It also avoids the "water hammer" effect in the underground water supply system and reduces equipment damage.
(5) The geological conditions underground in coal mines are complex, and the equipment structures are different. The various parameters of the soft starter can be modified according to the on-site situation to achieve the best starting effect and operating conditions.
The application of electric motor protectors in the coal mining industry
At present, most of the motors used in coal mine system equipment use thermal relays as overload protection components. Due to their small size, simple structure, and low cost, they have been widely used in production. However, due to the low sensitivity, large error, and poor stability of thermal relays, the protection is unreliable. Due to the influence of environment, temperature, and materials, the protection of motors is no longer suitable for the needs of modern coal mine production. During the maintenance process in the workshop, we found that most of the damaged motors were caused by overcurrent, rotor blockage, overload, phase failure, and undervoltage. However, the reasons for the damage to these motors are not the same, often resulting in protection circuit failure, failure, incorrect parameter selection, etc., all of which are the main culprits causing motor damage in accidents. If early warning and timely handling are possible, it can greatly avoid damage to the equipment motor, extend its service life, reduce maintenance costs, and improve operating efficiency.
The Odeli motor protector has protection functions such as overload, phase loss, imbalance, under load, grounding/leakage, and locked rotor. It can form a motor control and protection unit with electrical components such as contactors and motor starters, and has functions such as remote automatic control, on-site direct control, panel indication, signal alarm, and fieldbus communication.
Usually, when selecting a motor protector, full consideration should be given to the overload capacity of the motor to avoid damage. Improve reliability and production continuity. Strive to achieve economic rationality. In the selection of functions, comprehensive consideration should be given to factors such as the value of the motor itself, the type of load, the usage environment, the importance of the main equipment, whether stopping the motor operation will have an impact on production, and the degree of impact.
Through the above transformation, the stability of the power supply and consumption system will definitely be improved, and the automation level of the coal mine electrical control system will be raised to a higher level. At the same time, it will greatly reduce maintenance costs, improve the operating efficiency of the motor, increase economic benefits, and have a promoting effect on coal mine production.
