Air Heaters, Heat Pumps, Condensers, Cooling Units, Evaporators, and Chillers.
Rosenberg axial fans with improved, noise-optimized blades combined with electronically commutated motors (EC Motors or ECM) form a very efficient and design-optimized fan unit. Fast startup is ensured because of well-integrated components.
The fans are driven by EC (electronically commutated) motors with sizes G9, V8, GD84, GD112, and GD150 in conjunction with integrated EC-electronics. Custom-designed EC motors, flexible production of blades, and high-end metal fabrication give Rosenberg the capability to manufacture fans that provide the best possible benefit to customers while taking the design demands and the customer’s application into consideration.
Rosenberg EC-Motors (electronically commutated) are permanently magnetized synchronous motors designed as external rotor motors. A rectifier inside the electronics transforms the alternating current (AC) voltage into direct current (DC) voltage. Depending on the position of the rotor, the EC electronics provide the corresponding motor voltage to the motor (similar to a frequency converter). However, differing from a frequency converter, the EC electronics energize the stator phases depending on the rotor position, direction of rotation, and the speed requirement (commutation). Permanent magnets inside the rotor create a magnetic field, which is required to generate the torque. This makes it possible to achieve highly efficient, compact, quiet, continuous speed control.
Using deep groove ball bearings, closed on both sides, with specially paired grease lubricant, means that maintenance-free and low-noise operation is guaranteed. The winding insulation corresponds to thermal Class F. Compared to standard EN 60034-30, the Rosenberg EC motor is rated to efficiency class IE4.
The integrated protection mechanisms safeguard the fan from error statuses and overheating. The G9 and V8 signal an error over an open-collector output; the motors GD84, GD112, and GD150 do so through an alarm relay.
The electrical connection can be made at the motor size G9, V8, GD84, and GD112 (1~230V) via lead out connection cable and for the motorsize GD112 (3~230V / 3~400V) and GD150, directly via cable gland at the integrated terminal box of the motor.
The supply voltage range, which is designed for 50 and 60Hz networks, allows for a wide range of applications. The fans are designed for use on symmetric and neutral point grounded systems (TN-S, TN-C, TN-CS, TN networks). Other power supply networks would need to be checked for specific projects.
In this catalogue, all fans are shown in open-loop control, where the fan speed can be controlled continuously by a preselected target value. Depending on the specific type, the preselected target value can be defined by a 0-10V signal, a PWM signal, or Modbus RTU telegrams. Additional information can be found in wiring diagrams from page 32.
In closed-loop control, the EC fan compares the set point to the actual value and adjusts the speed independently within its possible speed range. This means if, for example, a 3V signal is connected to Analog1, the fan increases its speed up to 3V on Analog2 to match it.
Changing the operating mode, reconfiguring the analog input characteristics, or reducing the nominal speed can be accomplished in the software program ECParam or can also be ordered individually for specific projects.
Rosenberg Axial Fans with EC motors meet in their design the EMV-Directive EMV 2014/30/EU, Low Voltage Directive 2014/35/EU, and ErP Directive 2009/125/EC.
The motor sizes G9, GD84, GD112, and GD150, which are used in the fan types, are UL / CSA recognized. These types are marked on the respective pages with the “Recognized Component Mark”. Additional products must be checked for specific projects.
Air Heaters, Heat Pumps, Condensers, Cooling Units, Evaporators, and Chillers.
Rosenberg axial fans with improved, noise-optimized blades combined with electronically commutated motors (EC Motors or ECM) form a very efficient and design-optimized fan unit. Fast startup is ensured because of well-integrated components.
The fans are driven by EC (electronically commutated) motors with sizes G9, V8, GD84, GD112, and GD150 in conjunction with integrated EC-electronics. Custom-designed EC motors, flexible production of blades, and high-end metal fabrication give Rosenberg the capability to manufacture fans that provide the best possible benefit to customers while taking the design demands and the customer’s application into consideration.
Rosenberg EC-Motors (electronically commutated) are permanently magnetized synchronous motors designed as external rotor motors. A rectifier inside the electronics transforms the alternating current (AC) voltage into direct current (DC) voltage. Depending on the position of the rotor, the EC electronics provide the corresponding motor voltage to the motor (similar to a frequency converter). However, differing from a frequency converter, the EC electronics energize the stator phases depending on the rotor position, direction of rotation, and the speed requirement (commutation). Permanent magnets inside the rotor create a magnetic field, which is required to generate the torque. This makes it possible to achieve highly efficient, compact, quiet, continuous speed control.
Using deep groove ball bearings, closed on both sides, with specially paired grease lubricant, means that maintenance-free and low-noise operation is guaranteed. The winding insulation corresponds to thermal Class F. Compared to standard EN 60034-30, the Rosenberg EC motor is rated to efficiency class IE4.
The integrated protection mechanisms safeguard the fan from error statuses and overheating. The G9 and V8 signal an error over an open-collector output; the motors GD84, GD112, and GD150 do so through an alarm relay.
The electrical connection can be made at the motor size G9, V8, GD84, and GD112 (1~230V) via lead out connection cable and for the motorsize GD112 (3~230V / 3~400V) and GD150, directly via cable gland at the integrated terminal box of the motor.
The supply voltage range, which is designed for 50 and 60Hz networks, allows for a wide range of applications. The fans are designed for use on symmetric and neutral point grounded systems (TN-S, TN-C, TN-CS, TN networks). Other power supply networks would need to be checked for specific projects.
In this catalogue, all fans are shown in open-loop control, where the fan speed can be controlled continuously by a preselected target value. Depending on the specific type, the preselected target value can be defined by a 0-10V signal, a PWM signal, or Modbus RTU telegrams. Additional information can be found in wiring diagrams from page 32.
In closed-loop control, the EC fan compares the set point to the actual value and adjusts the speed independently within its possible speed range. This means if, for example, a 3V signal is connected to Analog1, the fan increases its speed up to 3V on Analog2 to match it.
Changing the operating mode, reconfiguring the analog input characteristics, or reducing the nominal speed can be accomplished in the software program ECParam or can also be ordered individually for specific projects.
Rosenberg Axial Fans with EC motors meet in their design the EMV-Directive EMV 2014/30/EU, Low Voltage Directive 2014/35/EU, and ErP Directive 2009/125/EC.
The motor sizes G9, GD84, GD112, and GD150, which are used in the fan types, are UL / CSA recognized. These types are marked on the respective pages with the “Recognized Component Mark”. Additional products must be checked for specific projects.
EC (Electronically Commuted or Electronically Controlled) motors are electric motors which have permanent magnets on the rotor and use electronics to control the voltage and current applied to the motor.
EC motors have no brushes, so they avoid the sparking and short life of brushed motors. Because they have electronics controlling the stator and do not need to waste power inducing the rotor field, they give better performance and controllability and run cooler than induction motors (for small motors, at least; high horsepower 3 phase induction motors can be very efficient). EC motors are used today in many fractional-horsepower applications where high motor efficiency, reliability, and/or controllability are desired.
EC motors are very high efficiency and maintain a high efficiency level even at part speed. This means that in most cases, they use from less than one-third to one-half of the electricity needed by the traditional "shaded pole" induction motors used in the ventilation and refrigeration industries, which in turn translates into lower operating costs and short payback periods.
EC motors’ high efficiency also means that the motors run “cool” and dramatically reducethe amount of waste heat produced. Reduced waste heat at the evaporator motor level also typically results in reduced operation at the compressor level, which allows further energy savings. Further, running cooler improves the life of highly loaded motor parts like windings and bearings.
EC motors also have a wider operating range than traditional induction motors, which means that one ECM motor can replace several induction motor models. In this way, the number of models required by a typical customer is significantly decreased, which reduces and simplifies inventory. This is the main reason why ECM product lines usually include fewer motor models than their induction counterparts.
In terms of speed control and features, because the motor’s operation is controlled by software, EC motors allow customers to optimize and integrate the motor, fan, and controller with the application and to include features like data communications, constant volume control, variable speed, etc.
EC motors are also quieter than traditional inefficient motors, have longer design life, and require less maintenance.
