EC centrifugal fans: High performance, quiet movement
EC centrifugal fans with backward curved blades have outstanding aerodynamic efficiency. Especially when used in applications such as air handling units (AHUs), computer slide-in modules, telecommunications systems, clean room technology, roof fans, range hoods, automotive and rail technology, etc., these fans are real space-saving wonders – to your benefit.
The various advantages of EC Centrifugal fans
The various advantages of the EC motor resulting from the use of state-of-the-art electronics make it the recommended choice for both air and drive engineering:
1) High Efficiency resulting in energy saving and fast amortization
2) Continuously variable speed control by analog or digital input 0-10V/PWM
3) Simple speed control or more complex closed-loop control options can be integrated at competitive cost
4) Cross linked bad bus-connected installations are easy to achieve
5) High performance density, i.e. compact design
6) Temperature, CO2, humidity and airflow-dependent speed control options (intelligent fans)
7) Minimal heat load due to extremely high efficiency.
8) Speed and/or air flow monitoring
9) Longer life resulting from lower rise temperatures, maintenance-free ball bearing and soft-start.
10) Long life expectancy and robust design comparable to asynchronous motor
11) Built-in protective systems ( e.g. Looked rotor protection, reverse polarity protection)
12) Easy connection : No complicated wiring and set-up with a frequency controller..
13) Can be operated directly from AC mains supply, or from DC.
Additional Functions
Constant pressure : Used in conjunction with a pressure sensor, the fan maintains the same pressure at varying airflow (ideal for ducted applications).
Constant airflow : The fan maintains the same airflow at varying pressure (ideal for filtered applications)
Hall effect : A tachometric output is available, which can be used for an optional alarm relay
Pressure control : A pressure sensor can be connected directly to the Electronic of the EC motor. The pressure control is made by the integrated electronics. No additional control unit is needed.
Master/Slave : This system is used when several fans are used together within a single application. The main fan (Master) is individually pressure controlled. The other fans (slaves) are then speed controlled by the Master fan : Slave Fans are always at the speed of the master fan.