The use of the inverter and the adjustment of parameters
With the development of industrial technology, frequency converters are more and more widely used in various fields. It is of great significance to master the use of inverter and parameter adjustment skills to improve the operation efficiency of the equipment, reduce energy consumption, and ensure the stable operation of the equipment. This article will give you a detailed introduction to the use of the inverter and the adjustment of parameters, so that you can easily cope with various industrial scenarios.
First, the basic principle of the inverter.
An inverter is a device that controls the speed of a motor by changing the frequency of the power supply. The basic principle is to convert alternating current into direct current through a rectifier, and then convert it into alternating current with adjustable frequency through an inverter for use by the motor. By adjusting the switching state of the inverter, the speed and torque of the motor can be changed.
Second, the use of the inverter.
Installation and wiring of the frequency converter.
Before using the inverter, it is necessary to first choose the appropriate model according to the actual needs and install it correctly according to the instructions provided by the manufacturer. The following points should be paid attention to during installation:
1) Ensure that the environment around the inverter is dry and well ventilated
2) Avoid direct sunlight and high temperature environments;
3) Avoid contact with flammable and explosive materials;
4) Make sure the wiring is correct and firm.
2.Start and stop of the inverter.
When starting the inverter, the power should be turned on first, and then the frequency should be gradually adjusted to the desired speed. When stopping the inverter, the frequency should be gradually reduced to zero before cutting off the power supply.
Parameter settings for the frequency converter.
The parameter setting of the inverter is an important part of the use process. Here are some common parameter settings:
1) Frequency setting: set the speed of the motor according to the actual demand;
2) Acceleration time: Set the time it takes for the motor to go from a standstill state to the set speed;
3) Deceleration time: set the time required for the motor to stop from the set speed;
4) Protection function: set overload, overcurrent, overvoltage and other protection functions to ensure the safe operation of the equipment.
3. Parameter adjustment skills of inverter.
Acceleration time adjustment tips.
Acceleration time is too short and the motor may be overloaded or damagedIf the acceleration time is too long, the efficiency of the equipment will be affected. Therefore, the acceleration time should be set reasonably according to the load characteristics and process requirements. In general, the acceleration time can be estimated based on the inertia of the load and the percentage of the motor's rated current. For example, for loads with high inertia, the acceleration time can be appropriately extendedFor loads with low inertia, the acceleration time can be appropriately shortened.
2.Slowdown time adjustment techniques.
Excessive deceleration time will cause the motor to heat up severely;Deceleration time is too short and the motor may be overloaded or damaged. Therefore, the deceleration time should be reasonably set according to the load characteristics and process requirements. In general, the deceleration time can be estimated based on the inertia of the load and the percentage of the rated current of the motor. For example, for loads with large inertia, the deceleration time can be appropriately extendedFor loads with low inertia, the deceleration time can be appropriately shortened. At the same time, it should be noted that the frequency should be gradually reduced to zero during the deceleration process.