Change the shutdown mode to inertia parking and you're done! In this way, after the fan is stopped, the inverter will immediately turn off the output, so that the fan can stop freely, at this time, although the fan is in the power generation situation, but the electricity generated by the fan will not pass through the inverter of the inverter to generate direct current, so the inverter will not overvoltage alarm, but it needs to be noted that before the fan is completely suspended, it must not be started again, otherwise, it is very easy to form inverter damage. Or set the inverter to the speed start mode, as long as the inverter supports the function!
Shutdown mode is how to shut down the output after the inverter is aborted, there are generally two kinds, one is deceleration shutdown, and the other is inertial shutdown. Deceleration and shutdown is the gradual decrease of the output frequency of the inverter, in simple terms, the inverter drives the motor and gradually changes the speed to 0. The second is inertial shutdown, that is, the inverter shuts down the output, so that the motor is in a free state. According to Newton's laws, any object has inertia, so that the moving motor slowly stops on its own. Because the inverter has turned off the output, the regenerative power of the motor will not enter the inverter, so there is no effect on the inverter, which is also the correct way to stop the fan.
Because most inverters, the default shutdown mode is to decelerate and shut down, which will cause the inverter overvoltage alarm. The fundamental reason is that the regenerative power of the fan, through the inverter of the inverter, is rectified into direct current, which is added to the DC bus of the inverter, resulting in an overvoltage alarm of the inverter.
The control of fans and pumps is one of the biggest applications of inverters, in order to make the inverters run normally, it is necessary to know the relevant processes of fans and pumps, correctly set the parameters of the inverters, correctly write the PLC programs, and ensure the cooperation between the PLC and the inverters.
Overvoltage, undervoltage, overload, and overcurrent are the four most common faults of the inverter, and the causes of these failures are fundamentally the reasons for the cooperation of the load and parameter setting PLC programs, which may be a single reason or a mixture of multiple reasons, therefore, in order to correctly deal with the inverter failure, we must understand the reasons for various alarms of the inverter, so as to be able to prescribe the right medicine and deal with it correctly.
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1. Method 1
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(1) The maintenance objectives are different
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1. Download the control program.
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Specifications for the use of power converters
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Maintenance & Installation
Work according to the weight of the product.
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1. Ground the grounding terminal of the inverter.
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