Project Scope and Motor Requirement
On July 21, 2026, LONGWELL opened an engineering project to evaluate a multi-blade forward-curved centrifugal blower design requiring a variable frequency setup and an EC motor configuration. The customer requirement specified adapting the blower drive to support variable frequency operation.
LONGWELL assigned the initial designation LWFDF-11-3A-1.5-4P-3-001 during initial project registration, and established the drawing and specification package under LWFDF-11-3A-1.5-4P-3-002.
Technical Specifications and Physical Configuration
The revised engineering drawing establishes the electrical performance targets and mechanical parameters for the variable frequency centrifugal blower configuration:
| Parameter | Specification Value |
|---|---|
| Model Number | LWFDF-11-3A-1.5-4P-3-002 |
| Voltage | 3~380 VAC |
| Frequency | 50 Hz |
| Power Output | 1500 W |
| Speed | 1450 RPM |
| Airflow Range | 3500 – 5000 m³/h |
| Air Pressure Range | 620 – 500 Pa |
| Motor Type | Variable Frequency Motor |
| Protection Rating | IP44 |
Physical features include a 350 mm by 221 mm housing profile, a 353.5 mm depth profile, and a rectangular outlet flange measuring 300 mm by 220 mm with 12 mounting holes of 8 mm diameter.
Engineering Output
The LONGWELL engineering team completed the technical design, product drawings, and standard specification sheets on July 29, 2026. Technical reviewer approval was completed on the same date, finalizing the drawing output under model LWFDF-11-3A-1.5-4P-3-002 for customer evaluation.
Discuss a Similar Requirement
If you are evaluating a centrifugal fan project requiring variable frequency control or specific pressure and airflow operating points, share your system constraints with our technical team. Please provide your required duty point (airflow and static pressure), operating voltage, physical mounting limits, and environmental protection level through the LONGWELL contact page or explore standard fan models on the LONGWELL Fan Selector.
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