What is EC Motor ? - GP MOTOR TECHNOLOGY CO.,LTD.

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What is EC Motor ?

What is an EC Motor?

Electronically Commutated (EC) motor is combines AC and DC voltages, bringing the best of both technologies. The principle is permanent-magnet brushless DC motor within the rotor, the stator is driven by electronic switches (which replace the Carbon brushes), controlled by a micro-controller. Electronic system (hall effect sensor or software is used to recognize the rotor position), the motor runs on a DC voltage, but with a normal AC supply. It have little more than half the power consumption of standard AC motors. DC motors already have low power consumption but if used in an AC application, the power needed converting AC to DC, using a bulky, inefficient transformer. The EC motor incorporates voltage transformation within the motor. The non-rotating part of the motor (stator) is extended to make room for an electronic PCB board which includes power transformation AC to DC, as well as the controls. Electronically commutated motors provide clear advantages over AC or conventional DC motors in terms of service life, controllability, flexibility, and cost-effectiveness.

The various advantages of EC motor (ECM, ESM)

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.

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