How to choose the fan motor inverter

The fan is a large inertia equipment, which has been running for a long time and does not require high speed accuracy.

Therefore, inverter manufacturers have special inverters for fans and pumps, and they can choose special inverters for fans and pumps when choosing.

During commissioning, set the parameters according to the size of the fan, and pay special attention to the acceleration and deceleration time to be a little longer in order to adapt to the large inertia.

Before the inverter is selected, several points are mainly determined: the purpose of the inverter, the type of load, the matching problem with the load, the application place, etc.

1. The purpose of using frequency conversion; Constant voltage control or constant current control, etc.

2. The load type of the inverter; For example, vane pumps or positive displacement pumps, special attention is paid to the performance curve of the load, which determines the method of application.

3. The matching problem between the inverter and the load;

1) Voltage matching; The rated voltage of the inverter corresponds to the rated voltage of the load.

2) Current matching; For ordinary centrifugal pumps, the rated current of the inverter is consistent with the rated current of the motor. For special loads, such as deep-water pumps, it is necessary to refer to the motor performance parameters to determine the inverter current and overload capacity with the maximum current.

3) Torque matching; This can happen when there is a constant torque load or when there is a deceleration device.

4. When using the frequency converter to drive the high-speed motor, the output current value increases due to the small reactance of the high-speed motor and the increase of higher harmonics. Therefore, the capacity of the inverter used for high-speed motor is slightly larger than that of ordinary motor.

5. If the inverter wants to run with a long cable, measures should be taken to suppress the influence of the long cable on the ground coupling capacitance and avoid insufficient output of the inverter, so in this case, the capacity of the inverter should be enlarged by one gear or the output reactor should be installed at the output end of the inverter.

6. For some special applications, such as high temperature and high altitude, it will cause the capacity reduction of the inverter, and the capacity of the inverter should be enlarged by one gear.

The frequency modulation mode of the inverter is more commonly used through the up down button on the inverter control panel, or the potentiometer (including the potentiometer integrated on the inverter control panel and the potentiometer connected to the control terminal of the inverter), which is the specific speed regulation mode, which needs to look at the parameter setting of the inverter, or that is, the frequency modulation mode of the inverter can be modified by the corresponding parameters of the inverter.

Frequency converters.

Summary. Hello, the frequency adjustment of the fan inverter generally has two ways: manual and automatic. Manual adjustment:

1.Enter the speed control interface of the inverter. 2.

Set the lower and upper limits of the frequency, and set the appropriate range according to the actual situation. 3.Adjust the frequency manually.

Auto-adjusting:1Enter the automatic speed control interface of the inverter.

2.Set the working conditions of the fan, including speed, load and other parameters. 3.

The system automatically adjusts the frequency to meet the requirements of the operating conditions. Automatic adjustment adjusts the frequency more precisely according to the required load to achieve more efficient and stable operation.

Hello, the frequency adjustment of the fan inverter generally has two ways: manual and automatic. Manual adjustment: 1

Enter the speed control interface of the inverter. 2.Set the seepage limit and upper limit under the frequency, and set the appropriate range according to the actual situation.

3.Adjust the frequency manually. Auto-adjusting:

1.Enter the automatic speed control interface of the inverter. 2.

Set the working conditions of the fan, including speed, load and other parameters. 3.The system automatically adjusts the frequency to meet the requirements of the working conditions.

Auto-adjustment adjusts the frequency rate more precisely according to the required load to achieve more efficient and stable operation.

Now the frequency conversion starts, the start is faulty, and it cannot be started.

There are many possibilities for the inverter to start and fail, which can be caused by the failure of the equipment itself or improper operation. The following are the common causes that may lead to vertical failure of the inverter1Power supply issues, such as power failure, fuse disconnection, etc.

Solution: Check whether the power supply is normal, confirm whether the power supply is stable, whether the wiring is loose, etc. 2.

Operational errors, such as incorrect parameter settings, resulting in overload, overcurrent and other problems.

Problems with the equipment itself, such as electromagnetic contactor failure, capacitor failure, etc. Solution: Check the equipment for damage or damage, and replace the device if necessary.

4.Line connection issues, such as poor wiring, loose wiring, etc. Wisdom in the solution of the method:

Check whether the line is connected correctly, whether the cable is damaged, etc., reconnect or repair the cable to make sure the line is connected correctly.

Is this a realignment or a new inverter that won't start?

Is the inverter not displayed when the inverter is energized, or is the motor not rotating after the inverter is turned on?

If it is a new inverter, after it is connected, the parameters must be set before it can be used normally.

I don't know who may have messed up the reference 3

That's the question of the setting, the manual is still there, what brand and what model.

Now you may have to set it up again, but you don't know how to set it up.

Because of the different products, the setting of the Lu brand and the model is different, you either find the manual, follow the steps, or tell me the hail friend brand and model, I will help you check it.

The following steps: 1. Determine the load type first: select the inverter suitable for slip bending according to the load type of the fan.

3. Adjust the speed: according to the actual working needs of the fan, adjust the output frequency and voltage of the inverter, and control the speed of the fan.

4. Adjust the PID parameters: according to the actual working conditions of the fan, adjust the PID parameters of the inverter to make the speed of the fan more stable.

5. Optimize the control strategy: According to the actual working condition of the fan, optimize the control strategy of the inverter to make the operation of the fan more efficient and stable.

It is necessary to follow the relevant safety specifications and operating procedures when adjusting the fan inverter to ensure the safety of work and the normal operation of the equipment.

Aosheng inverter can do the line blind upper section of the congratulatory line one-to-one service to adjust the frequency of the inverter, the way to burn the air has 1control panel buttons or knobs; 2.External potentiometer