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EC & DC FANS

EC Controller Technical SolutionAug 13,2025
Technical Solution
The overall controller scheme adopts a topology structure of three-phase rectification, power inverter, and signal control.
The three-phase power supply is rectified by diodes to become a stable DC voltage.
The inverter part formed by six power switching devices is connected with the motor winding.
Some controller parameters
Input voltage：3~ 380-480VAC
Input frequency：50/60Hz
Input power：5.2kW
Input current：8A
Input current：0.95
Brushless controller for EC and DC FansAug 1,2025
1, RS485 hardware interface: baud rate 19200，8E1.
2, Modbus RTU：A globally recognized free standard protocol.
3, Maximum number of fans: up to 247 units.
PC software compatibility: The 485 converter can be easily connected to the configuration software on the PC to reconfigure the fan’s parameters.
Remote online monitoring: Through a suitable converter, the real-time operation status of the fan can be remotely monitored.

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Here is a detailed breakdown of the advantages and disadvantages of Electronically Commutated Motors (ECM) compared to Shaded Pole Motors.

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