Advantages of Brushless DC Motors 3
Because the brushless DC motor runs in a self-control mode, it will not add a starting winding to the rotor like a synchronous motor with heavy load starting under variable frequency speed regulation, nor will it cause oscillation and loss of step when the load changes suddenly.
The permanent magnets of small and medium-capacity brushless DC motors are now mostly made of rare-earth neodymium-iron-boron (Nd-Fe-B) materials with high magnetic energy product. Therefore, the volume of the rare earth permanent magnet brushless motor is reduced by one frame size compared with the three-phase asynchronous motor of the same capacity.
In the past 30 years, the research on variable frequency speed regulation of asynchronous motors is ultimately to find a way to control the torque of asynchronous motors. Rare-earth permanent magnet brushless DC motors are bound to have wide speed regulation, small size, high efficiency and steady speed. Features such as small error show advantages in the field of speed regulation.
The brushless DC motor is also known as DC frequency conversion because it has the characteristics of the brushless DC motor and is also a frequency change device, and the international common term is BLDC. The control technology of the inverter is even better, so it deserves the attention of the industry. This product has produced more than 55kW, and can be designed to 400kW, which can meet the needs of the industry for power saving and high-performance drives.