Saturday, August 20, 2011

Background and Structure of Brushless Motor


In recent years, brushless motor as the rapid development of the field in the model as a driving force. As the output and price reasons, the past few years, brushless motor to use more air in the high-end model, since the rapid development of machining technology, brushless motor production costs of many, and it is currently entering the field at all levels of the model, From electric cars to electric remote control boat remote control to the electric model airplanes, everywhere.
Misunderstanding of the brushless motor
Many people have seen the model with brushless hub motor, they are used in battery-powered, so a lot of people in knowledge, there have been such a misunderstanding, that the brushless motor is a DC motor, it is not true, brushless motors are AC motors , is a three-phase AC permanent magnet motor, brushless motor 3 input model conductor current is AC, but this is not 50HZ AC mains sine wave, but from the brushless motor controller (commonly known as brushless ESC) out of the three-phase modulation becomes rectangular wave frequency is much higher than 50HZ, and with the motor speed change.
Brushless Motor Structural Analysis
Structure, brushless motors and brush motors are similar, there are rotor and stator, but the structure of the brush motor and the opposite; brush motor switch is the coil windings, and power output shaft is connected to the stator is a permanent magnet steel; brushless permanent magnet motor rotor is, together with housing and output shaft connected to the stator windings is to remove the brush motor is used to alternate the electric field for the brush, so called brushless motor (Brushless motor), I now have a problem, not the electromagnetic field of transformation, how to make brushless motor it?

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