What are the main parameters to be changed during the commissioning of the inverter?

Usually, according to the basic settings on the first few pages of the manual, including rated voltage, current, frequency, speed, upper and lower limits, acceleration and deceleration time, and automatic detection of motor parameters.

In general: command mode; Master Setting Selection; acceleration time; deceleration time; display parameter selection; Terminal function selection (4-20mA); motor rated current; the speed of the motor; The number of pole pairs of the motor, etc.

Control mode, interface function definition, motor parameters, protection parameters, number of operating parameters.

First, the acceleration and deceleration time is second, and the torque is increased by three. Electronic thermal overload protection IV. Frequency-limiting verb (abbreviation of verb): bias frequency, intransitive verb frequency, set signal gain seven. Torque limiting.

8. Select 9 for acceleration and deceleration mode. Torque vectoring control xThere are many functional parameters of energy-saving control inverter, and there are generally dozens or even hundreds of parameters for users to choose.

In fact, not all of them need to be set and commissioned, and most only need to use factory settings. However, some parameters differ greatly from actual usage. There are many relationships, and some of them are interrelated, so they need to be set up and debugged according to the actual situation.

Generally speaking, it is mainly the parameters of the motor: rated power, rated voltage, rated current, rated frequency, rated speed, etc. These can basically be found on the nameplate of the motor.

Command source selection: via panels, terminals, etc. Start and stop operation parameters:

The ramp rise time of starting and stopping, the minimum and maximum frequency of motor operation, the frequency of motor operation, etc. Of course, the inverter of each manufacturer brand is not the same, so you should read the instruction manual carefully.

The energy saving of the inverter is mainly manifested in the application of fans and pumps. After the fan and pump load adopts frequency conversion speed regulation, the power saving rate is 20% to 60%, because the actual power consumption of the fan and pump load is basically proportional to the cubic of the speed. When the average flow required by the user is small, the fan and pump use frequency conversion speed regulation to reduce the speed, and the energy-saving effect is very obvious.

However, the traditional fans and pumps use baffles and valves to adjust the flow, and the speed of the motor is basically unchanged, and the power consumption does not change much. According to statistics, the electricity consumption of fans and pump motors accounts for 31% of the country's electricity consumption and 50% of industrial electricity consumption.

It is of great significance to use a variable frequency speed control device on such loads. The more successful applications are constant pressure water supply, various fans, air conditioning and hydraulic pump frequency conversion speed regulation.

Inverter can also be widely used in various mechanical equipment control fields such as transmission, lifting, extrusion and machine tools, which can improve the process level and product quality, reduce the impact and noise of the equipment, and prolong the service life of the equipment.

After the use of frequency conversion speed control, the mechanical system is simplified, the operation and control are more convenient, and some can even change the original process specification, so as to improve the function of the whole equipment.

This is not necessarily, you need to see whether the inverter has changed the control board, or whether there are adjustment parameters during the maintenance process, the safer way is to restore the inverter parameters to the factory value, and then, re-set the parameters, which is the safest way.

Frequency converters. 1. Inverter.

What is the inverter, in general, is: AC - DC - AC (can also be said to be rectified first - then inverted), and the inverter that has undergone this processing process is also calledAC-DC frequency conversion is also one of the most used in various industries. In addition, there is a kindCommunication – Alternating current, this is also calledAlternating frequency converters.

Second, the principleThe inverter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, detection unit, microprocessor unit, etc. The inverter relies on the interruption of the internal IGBT to adjust the voltage and frequency of the output power supply, and provides the required power supply voltage according to the actual needs of the motor, so as to achieve the purpose of energy saving and speed regulation. With the continuous improvement of industrial automation, frequency converters have also been widely used.

1. Control mode:

i.e. speed control, rotation control, PID control, or other means. After the control mode is adopted, static or dynamic identification is generally carried out according to the control accuracy.

2. min running frequency:

That is, the min speed of the motor running, when the motor runs at low speed, its heat dissipation performance is very poor, and the motor runs at low speed for a long time, which will cause the motor to burn out. In addition, at low speeds, the current in the cable will also increase, which will also cause the cable to heat up.

3. MAX operating frequency:

The max frequency of the general inverter is up to 60Hz, and some are even up to 400Hz, and the high frequency will make the motor run at high speed, which is for the ordinary motor, and its bearing can not run beyond the rated speed for a long time, whether the rotor of the motor can withstand such centrifugal force.

4. Carrier frequency:

The higher the carrier frequency setting, the larger the higher harmonic component, which is closely related to the length of the cable, the heating of the motor, the heating of the cable and the heating of the inverter.

5. Motor parameters:

The inverter sets the power, current, voltage, speed, and max frequency of the motor in the parameters, and these parameters can be obtained directly from the motor nameplate.

In modern industrial production, the inverter has become one of the main driving equipment, because it has the advantages of good stability, low energy consumption and space saving. The adjustment of the parameters of the frequency converter plays a crucial role in the normal operation of the system. The following is an introduction to the specific operation of the inverter adjustment parameters.

The first step is a security check. Before starting to adjust the parameters of the drive, a safety check must be carried out to ensure that the safety precautions have been completed before the equipment is energized. The inspection includes checking whether the cable is firmly connected, whether the inverter is grounded, whether the inverter housing is electric, whether the electrical switch is off, etc.

Only when the check is correct, you can proceed to the next step of adjusting the parameters.

The second step is to adjust the parameters. When entering the operation of adjusting the parameters of the land, you first need to enter the parameter setting interface. According to the different process requirements, the inverter can adjust the parameters such as output frequency, current limit value, speed ratio, etc., to meet the different work requirements of Li Quan.

Parameter adjustment according to the specific situation, it is necessary to pay attention to the interaction between each parameter to avoid equipment failure caused by wrong adjustment.

The third step is to conduct a test. After the adjustment of the parameters is completed, the inverter must be tested to verify that the parameter settings are valid. The test includes checking whether the output waveform of the inverter is normal, whether the load speed is stable, and whether the noise and temperature of the inverter are normal.

Only after passing the test can the device be put into production.

All in all, correct adjustment of parameters is an important guarantee for the normal operation of the inverter. In operation, it is necessary to pay attention to safety inspection, carefully set various parameters, and strictly test to ensure the normal operation of the inverter.