BLDC Brushless motor

Time:2021-07-06 19:31 Click:

BLDC Brushless motor

Brushless DC motor

Brushless motors may be implemented as stepper motors as well; however, the term “stepper motor” tends to be used for motors with a radically different design and controlled with an open loop (hence the controller cannot detect when the stepper does not step due to too high shaft load; there is no shaft position sensor). They are frequently stopped with the rotor in a defined angular position while still producing torque. A well design power supply/controller/PMSM can also be held at zero rpm and finite torque. Two key performance parameters of brushless DC motors are the motor constants Kt ( torque constant) and Ke ( BEMF constant also known as speed constant Kv = 1/Ke ).

Brushless vs brushed motors (Brushless DC electric motor)

Brushed DC motors develop a maximum torque when stationary, linearly decreasing as velocity increases.[4] Some limitations of brushed motors can be overcome by brushless motors; they include higher efficiency and a lower susceptibility to mechanical wear. These benefits come at the cost of potentially less rugged, more complex, and more expensive control electronics.

Brushless motors offer several advantages over brushed DC motors, including high torque to weight ratio, more torque per watt (increased efficiency), increased reliability, reduced noise, longer lifetime (no brush and commutator erosion), elimination of ionizing sparks from the commutator, and overall reduction of electromagnetic interference (EMI). With no windings on the rotor, they are not subjected to centrifugal forces, and because the windings are supported by the housing, they can be cooled by conduction, requiring no airflow inside the motor for cooling. This in turn means that the motor’s internals can be entirely enclosed and protected from dirt or other foreign matter.

The maximum power that can be applied to a brushless motor is limited almost exclusively by heat;[citation needed] too much heat weakens the magnets[5] and may damage the winding’s insulation.

Here we are in Ke Gu Motor, we focus on DC motor producing and provide you with a better power solution.

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