280x280x80mm DC Brushless Motor Axial Flow Fan
PBM Motor and Fan is a China mainland manufacturer and EC technology consulting company offering an extensive range of EC(Electronically Commutated) motors, fans and solutions, investing in the latest developing, manufacturing and technical equipment with in-depth processes & procedures. Our main products are EC fans, including EC axial fans, EC centrifugal fans and EC blowers. We do both AC and DC current type. And EC Motor is the core technology of our products.
Eletronically Commutated Motors(EC Motors)also known as Brushless DC Motors(BLDC) are synchronous electric motors powered by direct-current(DC) electricity and having electronic commutation systems,rather than mechanical commutators and brushes.The current-to-torque and voltage-to-speed relationships of BLDC motors are linear.
PBM fans are widely used in many fields. For example, axial fan for telecom, backward curved centrifugal fan for air exchanger,(inline duct fan)hydroponic products and FFU, forward curved centrifugal fan for air purifier and air conditioning,blower for kitchen.

General Characters
Rated Voltage: 24 VDC
Operating Voltage: 16~28 VDC
Low-Start Voltage: 15 VDC
Rated Speed: 2750RPM
Input Current: 4.4A
Input Power: 105W
Air Flow: 1119CFM / 1900m3/H
Static Pressure: 0.88inH2O / 220Pa
Acoustical Noise: 69 dB(A)
Life Expectance: 50,000Hours(L10)
At 40ºC room, humidity 15%~65%RH.
Direction of Rotation:clockwise seen on motor
Direction of Air Flow: axial
Insulation Class: Class B
Insulation Resistance: 50 Mega Ohm minimum at 500VDC
Between frame and (+) terminal
Motor Protection: Locked rotor protection
Polarity protection
Automatic restart capability
Speed Control: Control input 0~10VDC / PWM
Protection Type:IP44
Dielectric Strength:5mA maximum at 500VAC 50Hz five second
Between frame and (+) terminal
Signal Output:FG (Frequency Generator)

Mechanical Charaters
Mounting Position:Any
Bearing System:NMB ball bearing
Weight: 2450g

Electrical Protection
Locked-rotor Protection: Over-current limiting circuit protects motor from damage at least for 72 hours of locked rotor condition at rated voltage.
Maximum Current under Locked Rotor:A, Typical inrush current when the motor is trying to re-start under locked rotor conditions is 2~4 times the normal running current reoccurring and for 16~20% of restarting cycle period.B, If he CL function is used this restarting inrush current is about the same as the normal running current.
Reverse Polarity Protection:No damage if the positive and negative leads are reversed under maximum operation voltage conditions.
Over Voltage Protection:The circuit will be shut down automatically when input voltage over 60VDC. And re-started when Voltage down to 60VDC below.
Soft Start:In 5 seconds after power on and speed control voltage gets to 1.5V or PWM duty cycle at 10% above.



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FAQ
1. Where is your factory located?
Our factory is located in Suzhou City, China, about 60mins from Shanghai Airport by car. Warmly welcome to visit us!
2. What products do you make?
We have specialized in EC fans for over 10 years since we stepped into the field in 2005. We also provide AC fans, crossflow fans, etc.
3.What kind of payments do you support?
T/T & L/C, other types please contact us.
4.What information do you need in order to get a quotation? 
Generally, we need the information like fan type, quantity, size, material, voltage, power, air flow.
5.Can I have samples for testing before placing orders? 
Yes. We suggest that our customers have some samples of their required fans for quality testing first.
6.Transportation
All available shipping ways could be applied, by courier, air or sea. Appointed shipping company or our own forwarders all could be used in shipment. Full-way tracking the cargos for you before the goods arrive. 
7.Global Market
Depending on advanced technology and knight service, we establish a good and diligent team and keep nice business relationship with a large amount of worthy clients in global market. We are prepared to provide the best fans to clients at competitive price. In addition to control of cost and quality, our stipulated lead-time, variety of designs, capability of product development and flexibility of service bring convenience and value added services to the clients.
8.Contact Us
We highly appreciate your any enquiry by email, call or instant message.