The frequency of the inverter does not go up to 20, and the frequency of the inverter does not go up

Inverter frequency source setting problem: When some inverters are set to terminal control mode, the frequency source automatically defaults to the external frequency source.

Some frequency converters require a separate frequency source. This requires checking that the inverter is set to an external frequency source and that the potentiometer is connected to the correct terminal for a given signal. This can happen if the inverter is not using an external frequency source and the frequency is preset.

Potentiometer failure: The potentiometer is broken, and replacing it can solve the problem.

Maximum frequency setting problem: The maximum frequency is set so that the maximum can only be adjusted.

Terminal function setting: Confirm whether the function of the terminal connected to the running line is set to the jog function, if it is set to the jog function, the inverter will run according to the jog frequency.

Load problem: Check whether the working current is normal and whether the load is too heavy.

Encoder problem: The encoder is broken, which is only suitable for closed-loop systems with encoders.

The drive is broken.

Is the target frequency of the inverter 4hz when you start it? The factory setting is generally the panel speed regulation, you add or subtract the frequency to try, the frequency is not changed, although some inverters have adjusted the speed, but only adjust the target frequency, not the operating frequency, but also have to confirm; Furthermore, is your load too large and the output torque of the inverter is not enough? Try to increase the torque.

I think you have connected the control line to the jog frequency terminal, you check whether his jog frequency setting is 4hz, and what frequency do you choose to give the signal, is the signal normal? Or use the panel to operate, if the phenomenon is still there, it means that it is a problem with the inverter.

I think it should be that the starting torque is not large enough, and the motor is in a stalled state. Change the control mode or add a torque boost.

The frequency conversion torque is not enough, and increasing the torque or October vector mode can solve the problem.

It should have nothing to do with the inverter.

Is it that the upper limit frequency is adjusted too low?

There should be something wrong with your setup, or it wouldn't be like this. If you only have a frequency problem, you can reset it after factory setting, and then check whether there is a problem with your control line, such as false contact.

There must also be a "frequency reference" setting, set to 50hz, look for it yourself.

The parameters are not set correctly!

What is the reason why the frequency of the inverter does not go up? - Landscape screen.

Eldest brother. You think about it clearly. If you just want to make the frequency normal.

You can do a factory reset. Also, you should read the instructions carefully. Everything can be solved.

According to my little brother's experience, it was you who set the wrong parameter or you didn't set the interlock parameter well.

There can be a variety of reasons for the failure of the inverter to regulate the speed:

1. Power supply problem: The power supply voltage and frequency connected to the inverter are unstable or do not meet the requirements, which will cause the inverter to fail to work normally.

2. Control signal problems: abnormal blank books of the control signals of the inverter, such as poor contact of control voltage, control signal circuit, controller failure, etc., will cause the inverter to not work normally.

3. Motor problems: There are faults in the motor itself, such as rotor breakage, winding short circuit, bearing damage, etc., which will cause the inverter to not fight for normal speed regulation.

4. Inverter parameter setting problem: Incorrect parameter setting of the inverter for grinding socks, such as incorrect setting of frequency range, voltage range, motor parameters, etc., will cause the inverter to fail to regulate the speed normally.

5. Failure of the inverter itself: There are faults in the inverter itself, such as damage to the capacitor, IGBT, damage to the circuit board, etc., which will cause the inverter to fail to regulate the speed normally.

The above are some of the fault reasons that may cause the inverter to fail to adjust the speed, and the specific causes need to be determined through specific troubleshooting.

If there is no display, first check whether the power supply line of the inverter is open, if there is no open circuit, and the inverter has been powered, the possibility of hardware failure of the inverter itself should be considered, which needs to be confirmed after detection by the inverter manufacturer or professional maintenance of the inverter; If there is a display on the control panel of the inverter, it depends on the specific content displayed on the control panel, if the fault is displayed, it should be combined with the inverter user manual to eliminate; If the parameter is displayed, press the button such as menu or prog to display the frequency.

Frequency converters.

1. When the potentiometer is given, the frequency instability may be due to the poor quality of the potentiometer and the poor contact 2. When the current and voltage are given, the frequency instability may be caused by the fluctuation of the given current and voltage signals, and this situation has.

Probably normal.

3. If it is set by the panel, there may be a problem with the internal circuit board of the inverter.

The frequency converter originally changes the frequency of the motor's power electricity, and of course the frequency will change.

2. Caused by electromagnetic interference; The power supply used by the inverter is not pure enough, and it is interfered by the harmonics of the power supply during operation, resulting in the unstable operation of the inverter.

If the speed regulation mode of the inverter is PID closed-loop control mode, then it may be normal to be fast and slow.

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The reason for the frequency instability of the frequency converter.

The quality of the potentiometer is not good.

It may also be caused by current, voltage, signal fluctuations.

If it is set with a panel, there is a problem with the internal circuit board of the inverter.

Question: The frequency of remote analog control is unstable, and the potentiometer is replaced with a new one. The control frequency of the rear panel is very stable, but the operation is inconvenient, and the answer to this situation is mostly caused by current and voltage, signal fluctuations.

How do I solve the question? Ask the teacher for some more advice.

Increase the size of the capacitance in the adjustment LC filter circuit.

Ask a good teacher! Thank you for the guidance. I'll try.

There are many reasons why the frequency of the inverter does not go up, if it is operated by the inverter panel, see if the potentiometer of the panel is damaged, if it is an external control, please check the external potentiometer. If it's all right, it depends on whether the parameter has a frequency cap. Restore the factory value to see, if it doesn't work, there is a problem with the control board.

Variable-frequencydrive (VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply.

The 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.