EC Fans

EC Fans and Motorized Impellers

Mechatronics EC Fans and Blowers offer efficiency and flexibility.

Electronically Commutated (EC) fans combine the best features of AC and DC fans. They utilize brushless DC motors with integrated AC to DC conversion. They are powered directly by AC voltage while offering the high efficiency and precise speed control of DC motors.

There are many advantages of EC fans compared to traditional AC fans.

EFFICIENCY
Reduce power consumption

Mechatronics EC Fans offer significantly reduced wattage without sacrificing performance. The highly efficient motors can reduce power usage by as much as 70% vs traditional AC fans.

GLOBAL INPUT VOLTAGE
Consolidate your fan requirements

Global Voltage models can operate over a wide input voltage range simplifying design. A single Global Voltage model can replace separate 115VAC and 230VAC models in a single part. Models with Global Input Voltage offer consistent airflow performance throughout a wide input voltage range of 90-260VAC.

ENHANCED PERFORMANCE
Increase your cooling capacity with higher airflow

EC Fan models offer higher airflow performance compared to standard AC fan models in the same package size. Increasing your airflow performance can reduce your operating temperature, improve system efficiency and prolong the life of your application.

EC Fan Connection Reference

SPEED CONTROL
Many EC fans allow for precise speed control, making it easy to adjust the fan speed to match cooling and sound noise requirements. Options are available for speed control via PWM or Voltage Control.

Voltage Control:
Fan speed is controlled using a separate 0-10VDC input into the speed control wire of the fan. Fan speed adjusts as the control voltage varies.

Impeller speed is 0 RPM when control wire input is 0VDC.
Impeller operates at minimum speed when control wire input is 1VDC.
Impeller operates at full speed when control wire input is 10VDC.
Fan DC ground must be connected to signal voltage ground reference

Pulse Width Modulation (PWM) Speed Control:
Motor speed is controlled using PWM to the speed control input of the impeller. Motor speed can be varied by changing the PWM duty cycle from 0% to 100%.

Recommended frequency: 1kHz ~ 5kHz
Voltage input: 0.8VDC ~ 5.25VDC
Fan DC ground must be connected to signal voltage ground reference

Tachometer Output

Tachometer Output Signal: The tachometer output signal can be used to monitor fan performance. The signal is a 2 pulse per revolution square wave output for 4 pole motors, 4 pulse per revolution for 8 pole motors and 3 pulse per revolution for 9 pole motors.

The tachometer output signal is open collector type and requires a pull up resistor in customer application as the signal does not have driven output voltage.

Tachometer Wiring Diagram:

Fan DC ground must be connected to signal voltage ground reference

The tachometer wire does not need to be connected for the impeller to operate.

Large EC Fan Wiring Diagrams

Mechatronics large EC fans including LPA, LPAI, LPB and LPBI models have separate wiring diagrams. Choose the selection below to view the wire diagram for specific models:

Diagram A = Models LPA300, LPA350, LPAI250
Diagram B = Models LPA400, LPA450, LPAI318, LPAI355
Diagram C = Models LPA500, LPA630, LPAI400
Diagram D = Models LPAI500
Diagram E = Models LPA710, LPA800, LPA900, LPAI560, LPAI630

EC Impeller Mounting

Standard motorized impeller integration requires an inlet ring to block the exhaust air from re-entering the air intake. For optimal performance, the inlet ring must be mounted to an adjacent surface aligning it with the impeller intake.

Mechatronics integrated mounting plate option eliminates the need for an additional adjacent surface for an inlet ring. Simply mount the part and power it up. This simplifies integration and reduces assembly time.