How to match EC motor for EFU? Speed ​​adjustment mode, efficiency range and control interface confirmation

Direct answer: The EFU uses an EC motor to match, and the core is three confirmations: first, the speed regulation method, confirm whether 0-10V, PWM or communication speed regulation is used, and whether the air volume needs to be maintained when the resistance rises; second, the efficiency range, confirm whether the EC motor is in a more suitable operating range near the actual working point, rather than just looking at the nominal efficiency; third, the control interface, confirm whether the power supply, speed regulation signal, status feedback and communication protocol can match the equipment system. After the three confirmations are completed, the working point of the whole machine is confirmed based on the resistance characteristics of the fan and filter.

The focus of the application of EC motors in EFU is not just to 'use EC motors', but to make the EC motors, fans and filters operate in a matching manner under actual working conditions. The following will start from three aspects: speed regulation mode, efficiency range and control interface.

1. How to match the speed adjustment method

EC motors are easy to adjust speed, but different speed adjustment methods have different interfaces and applicable scenarios:

Confirmation is required when matching:

1. What kind of speed regulation signal is provided by the equipment control system;

2. Whether the speed regulation range needs to cover the lowest to the highest speed;

3. Whether stepless speed adjustment is required or step-by-step adjustment is enough;

4. Whether it is necessary to automatically increase the rotation speed to maintain the air volume when the filter resistance rises;

5. Whether local manual tuning needs to be retained at the same time.

If the device requires 0-10V analog speed regulation, please refer toHow EFU realizes the key points of wiring, calibration and abnormal status setting in 0-10V speed regulation.

2. How to confirm the efficiency range

The efficiency advantages of EC motors need to be realized near the appropriate working point. Confirmation is required when matching:

1. Actual operating point : The efficiency curve of the EC motor is usually higher in a certain load range. It is necessary to confirm whether the actual air volume and static pressure of the EFU fall within this section;

2. System resistance : filter resistance, air inlet resistance and box resistance will affect the fan working point and thus the motor load;

3. Operating speed : When the EC motor operates at a lower speed, the efficiency performance may be different from the nominal value;

4. Long-term operating conditions : If the equipment operates for a long time, whether the working point is stable will directly affect energy consumption;

5. Efficiency changes after speed adjustment : How the comprehensive efficiency of the motor and fan changes after speed reduction operation needs to be evaluated based on actual working conditions.

Therefore, EC motor matching cannot only look at the nominal efficiency of the motor, but should combine the fan performance curve and the system resistance curve to confirm the operating performance near the actual operating point.

3. How to confirm the control interface

The interface between EC motor and equipment system is a key link in matching. Need to confirm:

If the number of equipment is small and centralized operation is required on site, we can cooperate withThe small FFU/EFU controller realizes start and stop, speed adjustment and communication status viewing. If the project requires the overall matching of DC or EC solutions, please refer toDC EFU equipment fan filter unit。

4. Matching of EC motor, fan and filter

The EC motor is only part of the EFU power system and needs to be coordinated with the fan and filter:

1. Fan matching : The speed and torque characteristics of the EC motor need to match the air volume-static pressure curve of the fan;

2. Filter matching : The filter resistance determines the system working point. High resistance filters require the motor to have sufficient static pressure margin;

3. Box structure : The internal space and air flow channel of the box will affect the actual working point of the fan;

4. Speed ​​adjustment margin : After the filter resistance rises, the EC motor should have a speed adjustment margin to maintain the target air volume;

5. Noise and vibration : Noise and vibration behave differently at different speeds and need to be confirmed based on actual installation conditions.

For ultra-thin or space-constrained devices, please refer to70mm ultra-thin EFU andThe structural plan of the fan filter unit of small-sized EFU equipment confirms the matching relationship between the EC motor and the box.

5. Reference of EC motor solutions in different equipment scenarios

6. Information required for EC motor matching

It is recommended to provide: when communicating with the project:

1. The speed regulation method and signal type required by the equipment;

2. Power supply conditions, including AC or DC, voltage and frequency;

3. Target air volume and static pressure requirements;

4. Filter specifications and resistance characteristics;

5. Whether speed feedback or status monitoring is required;

6. Communication protocols and linkage requirements;

7. The installation space limits the size of the motor;

8. Equipment operating conditions, including continuous or intermittent operation.

7. Aili Industrial EFU EC motor supporting capabilities

In terms of EFU motor solutions, Aili Industry has the following supporting conditions:

• Self-produced motors : Independently develop and produce AC, EC, DC and other motors, which can be configured according to product operating parameters;

• Fan matching : independently design the centrifugal fan and air duct structure, and match the fan parameters according to the EC motor plan;

• Control supporting equipment : The control system is independently developed and supports PWM speed regulation, RS485 communication, Modbus protocol, PLC joint control and group control, etc.;

• Whole machine verification : conduct air volume, wind speed, resistance and operation tests before leaving the factory;

• Customization capabilities : The cabinet, air inlet and outlet methods, and installation structure can be customized according to equipment space and interface requirements.

For more product information, please refer toEquipment-side fan filter unit (EFU)、Custom EFU andDC EFU equipment fan filter unit。

FAQ

What are the characteristics of EC motors used in EFU?

The EC motor can be directly connected to the AC power supply and completes commutation and speed regulation internally. It supports 0-10V, PWM or communication speed regulation, which facilitates linkage with equipment systems and status monitoring.

What speed regulation methods does EC motor EFU support?

Common methods include potentiometer, 0-10V analog, PWM and communication speed regulation, depending on the control card configuration.

What do you think of the efficiency of EC motors?

We should not just look at the nominal efficiency, but should combine the actual operating point, system resistance and operating speed with a comprehensive assessment to confirm the operating performance of the EC motor under actual working conditions.

Can EC motors replace AC motors?

In scenarios that require speed regulation, equipment linkage or status monitoring, the EC motor solution is easier to match. For applications with fixed operating status and simple control, AC motor solutions can also be considered.

Can EC motor EFU be group controlled?

Can. Through communication methods such as RS485 and Modbus, group control and status monitoring of multiple EFUs can be achieved.

Does EC motor need speed feedback?

Whether this is required depends on equipment requirements. Some control cards support speed feedback and can be used for status monitoring and abnormality judgment.

What parameters should be considered for EC motor matching?

It mainly depends on the speed regulation method, working point efficiency, control interface, fan matching and filter resistance characteristics.

Can ultra-thin EFU be used with EC motor?

It needs to be confirmed based on the box size and fan specifications. You can refer to the ultra-thin EFU structural plan.

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The content of this article is for reference only, please confirm with the actual project. The speed regulation methods, efficiency performance, interface configuration and operating parameters mentioned in this article may vary depending on product models, project conditions and actual working conditions. For specific EFU solutions, please refer to the actual confirmed product technical documents, drawings and test results.