The electric actuator keeps flipping back and forth
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Electric actuator for the secondary air damper door: in remote control mode, the set opening degree is 80%, and the actuator fluctuates between 78% and 82%. The power board and control board of the actuator have been replaced, but the problem persists; the opening degree reaches 100% without any changes. However, there are no changes either when in local control mode. Could someone please give some advice? Thank you!
The problem of repeated switching in electric actuators can be caused by multiple factors. After ruling out faults in the power supply board and control board, the following aspects can be considered: 1. **Abnormal feedback signal**: Check the actuator’s feedback device; it is possible that unstable signals from the position sensor cause the actuator to frequently adjust its position around the set value. 2. **Set parameters**: Check whether the deadband or gain settings of the actuator are too sensitive. Appropriately adjusting these parameters might solve the problem. 3. **Mechanical structure issues**: Check whether there is any looseness or excessive friction in the connection between the wind baffle door and the actuator, as this may cause the actuator to provide incorrect position information. 4. **External interference**: Verify whether the actuator system is affected by external interference, such as electromagnetic interference or vibrations. 5. **Software issues**: If programmable logic controllers (PLCs) or other control systems are being used, check whether there are errors in the control logic programs. It is recommended to thoroughly examine each of the above points, and investigate and make adjustments one by one to see if the problem can be resolved. If conditions permit, it is also possible to consult the technical support of the actuator manufacturer for more professional guidance. .
Try changing the production process parameters. This opening degree occupies a rather awkward position in production control; it has little effect on the regulation of fluid flow, and control remains stable when it is below 70%. For reference.
The problem is likely that the electric actuator is unable to make fine adjustments to the opening degree within this range, resulting in loss of control over the adjustment, and the electric actuator is damaged.
Even with a stable signal, there are still fluctuations; check whether the sensitivity is set too high. If that doesn’t work, try another unit.