Rosenberg cooling fan motor DD 80-42-2 EU1

Rosenberg cooling fan motorDD 80-42-2 EU1: ROSENBERG wind turbine from Germany * professional direct sales; Sales: German Rosenberg no volute fan, rectangular duct ventilation fan, axial flow fan 'Y-shaped', UNO BOX external rotor motor direct drive box type fan case, ER, DR, EQ, DQ axial flow fan DHAE, DHAD, EHAE, EHAD external rotor centrifugal fan, etc.
Losen Group's fans are equipped with directly driven external rotor motors, which have the following advantages compared to conventional fans:
long service life
Compact design
Realize stepless speed regulation through transformer or electronic control
Low starting current
Our standard fans protect the motor through thermal protectors in the motor coil winding. The dynamic and static balance of the impeller comply with German and DIN/ISO 1940 standards and quality standard G2.5.
motor
The use of external rotor motors has the characteristics of saving space, compact and beautiful design, and aesthetics. The motor is suitable for installation in the impeller and has * cooling effect. And it can ensure * stepless speed regulation. No need for V-belts, additional tensioning belts, and motor equipment. The motor uses a pair of sealed deep groove ball bearings, which have a long service life. High precision ball bearings can minimize the vibration generated.
The outer rotor motor has an extremely low starting current. The motor complies with protection level IP 54 and German standard DIN 40050.
The coil windings of the fan meet the insulation level f, and in addition, the coil windings are moisture-proof.
The temperature level of the explosive mixture is t1 to t3, with a range of 1 and 2. The fan is equipped with a variable speed motor, with a protection level of "e", and the safety application complies with German standard DIN 50019.
Motor Protection
The outer rotor motors of Lawson Group are equipped with thermal protectors embedded in the coil windings to protect the motors. Thermal protectors are metal circuit breakers that rely on temperature. Proper wiring is used to prevent overload, phase misalignment, and electrical issues
Machine stall and high ambient temperature.
The thermal protector is connected to a top contact ring to ensure motor protection. We recommend using a controller suitable for the Losen fan to connect the thermal protector for better motor protection.
Connecting terminal
Circuit connections can be made using junction boxes with a protection level of IP54. In special cases, aluminum junction boxes with a protection level of IP54 can be used.
Environmental working temperature
The maximum working temperature of the environment can be obtained from the data table. The displayed temperature may not be exact, and using a large motor may increase the ambient temperature (additional cost).
Rosenberg cooling fan motorSelection of DD 80-42-2 EU1 fan
When choosing a suitable fan, the following factors should be considered:
Required air volume
Required pressure loss
Appropriate size
Noise characteristics
In order to determine the required air volume, any existing resistance must be considered, and the working point below the front of the machine must be determined. Losses may come from the bending of pipelines and wind or rear filters, airflow diffusion, heaters, cooling elements, and pipelines.
Resistance is proportional to the square of air volume and can be represented in the characteristic curve.
Required air volume
Required pressure loss
The brand of this product is Lawson Rosenberg, and the model is DKHR450-4KW.138.5HA. The airflow direction is clockwise when viewed from the air inlet, and the blade wheel rotation direction is clockwise. The material is aluminum blades, and the fan pressure is low pressure. The type is an external rotor motor-driven volute free fan, with a long service life. It is used as a pipeline fan with 8 blades and is applicable to air heaters, cooling devices, etc.