What is the cause of the unbalanced input current of Inovance inverter?

If the input current of the inverter is unbalanced, you can try to invert the power supply of the inverter to three phases, if the measurement results are still like this, it proves that the problem comes from the inverter itself, at this time, you need to contact the inverter manufacturer or a professional person who repairs the inverter, and the inverter can be confirmed after testing; If the current imbalance changes with the inverter during the inverter, it is proved that the problem is with the power supply of the inverter.

As for the two alarms you mentioned**, ERR10 is the inverter overload and ERR14 is the module overheating.

Inverter governor.

1. The inverter is overloaded.

1. Possible reasons: the load is too large or the motor stall occurs, and the inverter is small.

2. Solution: reduce the load and check the motor and mechanical conditions, and replace it with a higher power inverter.

Second, the module is overheated.

1. Possible causes: the ambient temperature is too high, the air duct is blocked, the fan is damaged, the module thermistor is damaged, and the inverter module is damaged.

2. Solution: reduce the ambient temperature, clean the air duct, replace the fan, replace the thermistor, and replace the inverter module.

Overall, it feels very much like the harmonic content in the power grid is too high, resulting in false alarms from the inverter. If it is a false alarm, you can try to install the MLAD-V-SR0300 inverter input filter for 110kW inverter on the power side of the inverter.

First of all, disconnect the motor wire on the side of the inverter, use a 500V shake meter to detect the insulation of the wire and the motor to the ground, if there is a problem (the insulation resistance to the ground is less than a megaohm), then check the wire and motor separately. I don't know what kind of alarm you are talking about protection, generally there is a problem with insulation, and an overcurrent fault will be reported. If there is no problem with the shake meter detection, it is likely that the inverter is faulty and needs to be returned to the factory for testing.

That can only mean that your motor is damaged, use a multimeter to measure it out of the shake meter to try it, it is estimated that there is leakage to the ground, most of this situation is a problem with the motor.

The output voltage of the inverter is unstable, first of all, it depends on what equipment you use to measure the voltage of the output end of the inverter, because the voltage waveform of the output end of the inverter is PWM waveform, or called the square wave waveform, with an ordinary digital multimeter, it is impossible to measure the accurate value, or that is, the output voltage value of the measured inverter has no reference at all, in order to obtain a more reference value, you need to use a mechanical meter, or a digital instrument with strong anti-interference ability.

If the output frequency of the inverter is steady-state, and the output voltage is unstable, it is likely that the parameter setting of the inverter or the quality of the inverter itself is a problem, which needs to check the parameter setting of the inverter, or contact the inverter manufacturer or a professional person to repair the inverter to test the inverter; If the output frequency of the inverter is constantly changing, then the output voltage of the inverter changes more normally, because the output frequency and output voltage of the inverter change synchronously.

After the installation of the inverter, the motor has the problem of frequent burnout, the fundamental reason is that the voltage waveform output by the inverter is PWM wave, this waveform contains a large number of harmonics, and has a high DU DT, which is the main reason for the frequent damage of the motor, like this case, it is necessary to consider the selection of the inverter output special reactor, DU DT filter or MLAD-SW sine wave filter and other harmonics and DU DT suppression devices at the output end of the inverter.

Measured voltage waveform at the output of the inverter.

Summary. The reason why Inovance inverter has no output voltage is that the output frequency is low, after checking the parameters of the inverter, please note that repairing the inverter problem requires relevant professional knowledge and skills, if you do not understand the specific situation or lack relevant experience, it is recommended to contact a professional electrical engineer or maintenance personnel for overhaul and maintenance. At the same time, in order to ensure personal safety, please perform relevant operations in the power-off state.

The reason why Inovance inverter has no output voltage is that the output frequency is low, after checking the parameters of the inverter, please note that repairing the problem of the variable frequency converter requires relevant professional knowledge and skills, if you do not understand the specific situation or lack relevant experience, it is recommended to contact a professional electrical engineer or maintenance personnel for repair and maintenance. At the same time, in order to ensure personal safety, please perform relevant operations in the power-off state.

Inovance inverter can be called one of the leading brands of domestic inverters. Since its establishment in 2003, Inovance's main business is the R&D, production and sales of low-voltage inverters, with the launch of vector inverter and the success of elevator integration in the elevator market, Inovance has gradually become a leading manufacturer of industrial automation in China, especially in the domestic low-voltage inverter market, Inovance inverter has been on an equal footing with Siemens and ABB inverters.

Hello dear! Regarding the setting of constant speed overcurrent of Inovance inverter, I have the following views and detailed introductions: Viewpoint:

When setting the constant speed overcurrent of Inovance's inverter, it is necessary to make reasonable settings according to the actual application situation to ensure the safe operation and stable performance of the equipment. Details: Inovance inverter is a device used to adjust the speed of the motor, which controls the speed of the motor by changing the frequency of the power supply.

During use, if the motor load suddenly increases or other abnormal conditions occur, it may cause the motor current to exceed the rated value, which is the constant speed overcurrent. In order to protect the motor and the inverter, we need to set the appropriate constant speed overcurrent value. First of all, we need to know the rated current of the motor, which can usually be found in the technical data manual of the motor.

Then, we can set a suitable constant speed overcurrent value according to the actual situation and usage requirements. Generally speaking, the constant speed overcurrent value should be slightly higher than the rated current of the motor to ensure that the motor can be protected in time when the load surges. When setting the constant speed overcurrent, we can operate it through the parameter setting interface of the Inovance inverter hood returner.

The specific steps are as follows:1Enter the parameter setting interface of the inverter.

2.Find the parameter associated with the constant velocity overcurrent, which is usually a percentage value. 3.

According to the rated current and actual demand of the motor, set a suitable constant speed overcurrent value. 4.Confirm the settings and save the parameters.

In addition to setting a constant speed overcurrent, we can also take other measures to protect the motor and inverter.