How to achieve local speed adjustment of EFU? Knobs, controllers and speed setting methods

EFU local speed adjustment is suitable for a single device or a small number of devices. The control interface can use knobs, buttons or touch methods, but '50% rotational speed' does not equal '50% air volume'. The fan curve and system resistance are nonlinear, so each gear needs to be calibrated with actual air volume or key point wind speed.

First define the purpose of speed regulation

Speed ​​regulation may be used for prototype debugging, process switching, working and standby modes or filter resistance compensation. Different purposes correspond to different permissions and operation methods to prevent on-site personnel from misadjusting key parameters.

Confirm control signal and motor drive

DC or EC power systems can use different speed control signals depending on the design. The controller, motor drive and power supply must match each other and confirm the minimum starting value, effective speed range and power-off memory.

Create a correspondence table between gear levels and performance

Under the specified filter and installation conditions, test the rotation speed, air volume, average wind speed, uniformity, power and noise of each gear. Write the gear that meets the process requirements into the equipment parameters instead of letting the user adjust based on feeling.

Limit and protect key settings

Mass production equipment can set permissions for the maximum speed, minimum operating gear and maintenance parameters. If the filter resistance increases, the rotation speed should not be increased indefinitely and should be judged based on the pressure difference and maintenance rules.

Keep debugging records on delivery

Record the controller model, program version, gear parameters and actual measurement results. This record can be used to quickly restore baseline after replacing a motor, controller, or filter.

FAQ

Can the rotational speed percentage be directly converted into air volume percentage?

It cannot be simply linearly converted and should be based on the actual measurement of the specific system or the fan curve.

Is local control suitable for multiple EFUs?

A small number of independent devices are OK; when the number is larger or a unified mode is required, centralized control is easier to manage.

Is it okay to just turn up the speed when the filter gets dirty?

The pressure difference, power and noise should be confirmed before short-term compensation, and the filter should be replaced when maintenance conditions are met.

How does Aili Industrial configure the EFU local speed regulation function?

EFU local speed adjustment can be achieved through knobs, button controllers or controllers with display functions. Different control methods are suitable for different equipment structures: the knob speed adjustment operation is direct, suitable for equipment that requires on-site manual adjustment; the digital controller is convenient for setting and recording speed parameters, and is also more suitable for projects that require clear gear management.

During the speed adjustment process, changes in fan speed will affect air volume, static pressure, input power and operating noise. Therefore, the EFU speed should not be set independently from the actual working conditions of the equipment, but should be adjusted in combination with the filter resistance, air supply area and target wind speed.

Aili Industrial can configure the EFU with knob speed regulation, local controller or preset multi-speed speed according to the equipment's operation mode, installation location, power supply conditions and control requirements. For batch equipment projects, the working speed of the prototype can be determined first, and then the parameters can be solidified into subsequent products to keep the control logic of the same type of equipment consistent.

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Conclusion: EFU local speed adjustment can be achieved through knobs, buttons or touch controllers. During debugging, you should not only record the rotational speed percentage, but also solidify the air volume, wind speed, power and noise corresponding to each gear.