What Is The Advantage Of The Motor?
- Jun 29, 2018 -
What is the advantage of the motor?
The brushless DC motor consists of a motor body and a driver and is a typical electromechanical integration product. The stator winding of the motor is often made into a three-phase symmetrical star connection, which is very similar to a three-phase asynchronous motor. The rotor of the motor is affixed with magnetized permanent magnets. In order to detect the polarity of the motor rotor, a position sensor is installed in the motor. The driver consists of power electronics and integrated circuits. Its functions are: receiving the start, stop, and brake signals of the motor to control the start, stop, and brake of the motor; receiving the position sensor signal and the forward/reverse signal to control the inverse Change the on and off of each power tube of the bridge to generate continuous torque; accept the speed command and speed feedback signal to control and adjust the speed; provide protection and display, etc.
|Since the brushless DC motor is operated autonomously, it does not add starter windings on the rotor like a synchronous motor with heavy-duty start under heavy-duty speed regulation, nor does it cause oscillation and out-of-step when the load suddenly changes. Permanent magnets of medium and small-capacity brushless DC motors mostly use rare-earth neodymium-iron-boron (Nd-Fe-B) materials with a high magnetic energy product. Therefore, the volume of the rare earth permanent magnet brushless motor is reduced by one frame number compared with the same capacity three-phase asynchronous motor. In the past thirty years, the research on the frequency control of asynchronous motors has been based on the search for ways to control the torque of asynchronous motors. Rare-earth permanent magnet brushless DC motors will inevitably use their wide speed, small volume, high efficiency and steady-state speed. Features such as small errors show advantages in the field of speed regulation. The brushless DC motor has the characteristics of a DC brush motor and is also a frequency change device. Therefore, it is also known as DC frequency conversion. The internationally accepted terminology is BLDC brushless DC motor operating efficiency, low speed torque, speed accuracy, etc. The frequency converter of technology is better, so it is worth paying attention to the industry. This product has produced more than 55kW and can be designed to 400kW, which can solve the industry's energy-saving and high-performance drive requirements.|