Working characteristics of Brushless DC Electric Motor

- Dec 27, 2019-

In order to solve the non-mechanical contact commutation, the Brushless DC Electric Motor has eliminated the brush, and placed the armature winding and the permanent magnetic steel on the stator and rotor sides, respectively, and has become a flip-chip DC motor structure. Want to realize its speed and steering control, as well as the rotor position sensor and inverter to form a commutation device.

Its stator structure is very similar to ordinary synchronous or inductive motors. However, the winding form of the Brushless DC Electric Motor is different, which will affect the reaction potential waveform of the motor and thus affect the performance of the motor. Its winding forms mainly include concentrated distance winding, distributed distance winding, and short distance distributed winding. In general, a Brushless DC Electric Motor with a full-distance concentrated winding can obtain a better trapezoidal reaction potential waveform, while a Brushless DC Electric Motor with a short-distance distributed winding is beneficial for reducing torque fluctuations. The rotor structure of the Brushless DC Electric Motor also has surface-mounted magnetic poles, embedded magnetic poles, and annular magnetic poles. The commonly used position sensors include electromagnetic, photoelectric, and sensitive position sensors.

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