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| sunnysky motors |
According to statistics, it is said that brushed DC motors have been in commercial use since 1886. While, brushless motors became commercially viable until 1962. Brushed DC motors develop a maximum torque when stationary, linearly decreasing as velocity increases. Some limitations of brushed motors can be overcome by brushless motors, and 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.
As typical brushless motors, Sunnysky motors have permanent magnets which rotate and a fixed armature, eliminating problems associated with connecting current to the moving armature. An electronic controller replaces the brush/commutator assembly of the brushed DC motor, which continually switches the phase to the windings to keep the motors turning. The controller performs similar timed power distribution by using a solid-state circuit rather than the brush/commutator system.
Compared with brushed motors, brushless motors have more torque per weight, more torque per watt, increased reliability, reduced noise, longer lifetime, elimination of ionizing sparks from the commutator, and overall reduction of electromagnetic interference. 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 motors’ internals can be entirely enclosed and protected from dirt or other foreign matter.
It is obvious from the above that the brushless sunnysky motors are really outstanding and amazing, possessing many advantages over brushed motors. The brushless motors are definitely better choices for people to have.
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