Centrifuge current fluctuations
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Dear all: Our workshop is equipped with 12 centrifuges (1-8# form one line, 9-12# form another line, with 2 pumps supplying power to each line). These lines operate in parallel. We are currently facing the following issues, and we would appreciate any guidance and suggestions you can provide. When 11 or 12# are started simultaneously, they affect each other’s current consumption by the main machines. For example, if 9–11# are turned on, the production load increases; if I then try to start 12#, the current consumption of the main machines 10# or 11# suddenly rises, requiring that production be halted. However, running the equipment idly has no adverse effects. At the same time, when my current #1 line is in use with #2 centrifuge running, the other centrifuges operate normally while #2 is idling; however, once feeding starts, the current consumption of the main unit of #11 centrifuge also rises suddenly, requiring that feeding to #2 centrifuge be stopped. I would appreciate your guidance on why the main and auxiliary units of the centrifuge are equipped with variable frequency drives.
Check if there is a problem with the motor. . . . . The current is not high during no-load operation
I mean, during no-load operation, the current is not high. . . . I mean, with the material loaded and a load present, should we check the motor for any issues?
This post was last edited by li*nji on 2020-4-16 at 11:13 – is it a horizontal screw sedimentation centrifuge with two motors and two variable-frequency drives? If it is that device: Check the grounding of the detection device, motor, and inverter. The problem arises because the inverter uses a common DC bus technology; during feeding, the auxiliary motor operates as a generator, causing the bus voltage to rise and leading to significant electrical interference. Proper grounding and shielding should resolve the issue.