Products Description

The smart control HVLS fan in our DCHVLS PMSM line refers to its intelligent electronic control stage rather than to any external app or network feature. A built-in variable-frequency controller generates a sine-wave output that ramps the gearless permanent-magnet synchronous motor up and down smoothly, so the fan never jerks on start or shut down. The same controller provides stepless speed regulation, letting operators set the airflow level to suit the room, and it incorporates our speed-tracking restart technology - if power is briefly interrupted, the fan restarts smoothly without coming to a full stop, which protects the drive train and keeps air moving without a manual reset. The control stage works directly on the PMSM rotor through a stepped anti-drop motor shaft, with double-row angular-contact bearings and a 3D convection cooling structure that keeps temperature rise low enough to prevent demagnetization.

For a buyer specifying "smart" control, the value is in how consistently the control behavior behaves across the whole order, and that is where our OEM/ODM process matters. We tune the variable-frequency parameters, ramp profile and restart behavior to your required voltage and frequency during development, then hold that configuration across production. Because the electronic control and the gearless motor are built on the same line rather than sourced separately, the startup curve and speed range you test on the sample are the curve delivered on every unit.

Specifications

Parameter	Specification
Control type	Variable-frequency electronic control, sine-wave output
Motor type	Gearless PMSM direct drive
Blade diameter	2000–7300 mm
Blade count	5–8
Motor power	0.4–1.8 kW
Power supply	380 V 3-phase / 220 V single-phase, 50/60 Hz
Max speed	55–120 RPM (stepless adjustment)
Air volume	2,560–15,000 m³/min
Restart behavior	Speed-tracking restart, smooth without full stop
Net weight	28–128 kg

Applications

Assembly lines with variable staffing

stepless speed adjustment lets the controller match airflow to the shift and the heat load, instead of forcing operators to tolerate fixed full-speed circulation.

Exhibition halls and waiting areas

smooth start/stop avoids the abrupt draft visitors feel when a large fan switches on, making the space comfortable at any speed.

Multi-unit parallel plants

speed-tracking restart means brief power dips do not trigger a clattering sequence of manual restarts across a bank of fans.

Customization

OEM/ODM and private-label builds, with the electronic control tuned to your drawings, voltage and frequency requirements.
Blade diameter 2000–7300 mm and blade count 5–8, matched to your room size and coverage needs.
Motor power from 0.4–1.8 kW, supplied for 380 V 3-phase or 220 V single-phase, 50/60 Hz.
Roof-beam clamped mounting for clear floor heights of 4.5 m and above.

Packaging & Transportation

Each unit is fully tested and 100% inspected before packing in fumigation-free plywood wooden cases. We trade on EXW, FOB, DDP or CIF terms, and third-party inspection is accepted prior to shipment.

FAQ

Q1. Can I order a sample first?

A: Yes, samples are available, but they are chargeable rather than free. Custom sample development takes about one week, and mixed colors or models are allowed.

Q2. What payment terms are available?

A: We accept 30% deposit with 70% before shipment, 50%+50%, or 100% upfront, in both USD and RMB.

Q3. What after-sales support do you provide?

A: We supply an installation manual and installation videos, offer video guidance during setup, and respond to after-sales questions within 24 hours.

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