ECM motor, otherwise known as BL motor or brushless DC motor, is a type of electronic motor that uses an electronic commutation system. It is powered by direct current and does not make use of brushes or any other type of mechanical commutator, which is primarily the reason why many people refer to it as a brushless direct current motor.

Some people use the term “stepper motor” to describe ECM motor or other brushless motors of this type. However, this may not exactly be an accurate description of what this type of motor is. A stepper motor is a type of electric motor that is frequently stopped during operation. Stepper motors are basically designed to function in that mode whereas electronically commutated motors or ECMs do not necessarily function like that.

ECM motor has been used in commercial industries as early as 1962 but more commercial applications for this type of electric motor came a few decades later. This type of electric motor has several distinct advantages over brushed DC motors. Since ECM does not make use of mechanical commutation, it does not suffer the same type of mechanical wear and tear that brushed DC motors are prone to. Due to the relative design of ECM it presents other interesting advantages over brushed DC motors. Expect to get a lot more torque per weight with this type of electric motor as well as more torque per watt. Since this brushless electric motor has fewer mechanical parts, there is less commutator erosion thus gaining a longer service lifetime, reduced mechanical noise, and increased reliability.

ECM motor also does not require any amount of airflow inside the motor for cooling purposes. This is due to the overall construction of this electric motor. ECM is designed with housing providing the support for the windings. There are also no windings on the motor’s rotor. Another distinct advantage of this type of design is the fact that the entire assembly is not affected by centrifugal forces. ECM motor is also more efficient at converting electrical energy into mechanical force. This is also another advantage that is derived from the absence of brushes in this type of electric motor.

Electronically commutated motors do not have any losses due to friction or electricity. This advantage over brushed DC motors is more evident when an ECM performs at low loads or no loads. However, it should be noted that when the mechanical load is high, both brushed and brushless DC motors operate at virtually the same efficiency level. Overall, ECM motor tends to be more efficient that its industry counterparts. If there is one disadvantage of electronically commutated motors that should be noted, then that would have to be its cost. Compared to brushed DC motors, the cost of installing and implementing ECMs is relatively higher. People should consider the long term benefits of ECM motor versus the cost of procuring and implementing them.

ECM motor is used in a wide variety of applications in today’s industries. They are used in devices that are pretty common today such as hard drives and DVD players. Any electronic equipment that has small cooling fans makes use of these motors. Cordless power tools and direct drive turntables also have ECM motors installed in them.