When existing product specifications cannot meet customer requirements, DC FAN can accept the design and development of customized products. Based on the requirements proposed by customers, we will carry out design and customization.

1."Specification Requirements": First, you need to provide the approximate dimensions of the fan, flow rate requirements, pressure or corresponding operating point requirements, noise requirements, and electrical control requirements. In the initial stage, the primary focus is on providing approximate dimensions, flow rate, and operating point requirements.

2."Evaluation and Quotation": Based on your general requirements, DC FAN will propose a solution promptly, leveraging our years of research, development, and manufacturing experience. In the context of customizing fans, mold development and design fees are often required. DC FAN typically includes the mold and design fees directly in the proposed solution.

3."Payment of Fees": If you accept DC FAN's quotation terms, you can directly pay the fees stated in the quotation. The payment terms can be flexible, such as an advance payment of 10%, 50%, or 100%. The specific details of this business collaboration can be discussed further, and the final terms will be based on the mutually agreed-upon agreement.

4."Fluid Simulation": Based on your dimensional requirements, DC FAN will design fluid structures such as the fan housing, impeller, or blades within the specified dimensions, and then perform fluid simulations at specific speeds. We have highly experienced fluid engineers proficient in using Fluent, combined with supercomputing centers, to quickly obtain flow calculation results.

5."Structural Modification and Fluid Simulation": Based on the simulation results of the initial version, the flow rate often fails to meet the customization specifications. DC FAN will modify the housing structure, blade structure, and flow channel structure according to the actual calculation results, followed by fluid simulation, further structural modifications, and additional fluid simulation iterations until the simulation results exceed the customization specifications. In this process, we obtain two critical parameters: the fan speed and torque requirements. These parameters will be used for subsequent electromagnetic simulation calculations of the motor.

6."Pressure Simulation": Based on the previously designed product structure, we proceed with pressure simulation for a sealed outlet. The modeling for pressure simulation differs from that of fluid simulation. During pressure simulation, we obtain another key parameter: the pressure value.

7."Magnetic Circuit Simulation": Once we obtain the rotational speed and torque data, we can proceed with the motor design and magnetic circuit simulation. Initially, we need to determine whether there are existing motors with similar dimensions that can be matched, or if a new motor design is required. Based on the requirements and through software analysis, we will ultimately determine the dimensions of the motor's stator and rotor as well as the winding parameters.

8."Prototype Production": Based on the stator and rotor dimensions and winding parameters obtained from Step 7, we can manufacture motor samples using CNC housings. Using the impeller and housing drawings finalized in Step 6, physical samples of the impeller and housing can be produced via 3D printing or CNC machining.

9."Assembly, Validation, and Testing": Using the prototypes obtained in Step 8, we need to validate the design prototype through testing equipment. If the validation results do not align with the design data, a redesign process is initiated: if flow rate data does not match, we return to Step 4 to restart the design; if motor data does not match, we return to Step 7 to redesign the motor.

9.1 "Flow Rate and Pressure Validation": DC FAN possesses a relatively comprehensive wind tunnel testing setup with clearly defined measurement ranges. We have Fluke flow measurement equipment capable of testing minute flow rates, high-pressure wind tunnel equipment for testing up to 100,000 Pa, and large-capacity wind tunnel equipment for testing up to 2,000 CFM.

9.2 "Noise Verification": DC FAN has a dedicated noise testing chamber, where the background noise can be as low as 17dB, fully meeting the noise testing requirements for most products.

10."Electrical Control Testing": Once the dimensions, flow rate, pressure, and noise levels meet the customer's requirements, DC FAN will proceed with electrical control design and compliance testing.

10.1 "Efficiency Testing": The electrical efficiency of the product must meet specific requirements, such as 90%. Excessive power consumption should not be wasted on ineffective heat generation. Higher efficiency also indicates lower temperature rise and longer product lifespan.

10.2 "Voltage Endurance Testing": Different usage scenarios require different voltage ranges. For example, household handheld products may only require a constant 5V, while automotive products may need to operate normally within 9–16V. Reliability testing in this area will be conducted according to the customer’s specified requirements.

10.3 "Temperature Endurance Testing": Every product has an operational ambient temperature range. Some products require a range of -10°C to 50°C, others -40°C to 85°C, and some -40°C to 100°C. Based on the specific temperature requirements, temperature testing will be conducted to obtain data on motor temperature rise and the reliability of other components under extreme temperatures.

10.4 "Lifespan Testing": The product will undergo cyclic on-off testing and temperature-accelerated aging tests to preliminarily assess its expected lifespan.

10.5 "Salt Spray Testing": For customers in environments with high humidity or corrosion, salt spray testing can be added.

11."Sample Delivery and Mold Production": After completing all tests, the samples are delivered to the customer. Once the customer confirms that there are no issues, mold quotation and production can proceed, moving into the manufacturing phase.