The application of DC brushless motor in advertising light boxes The advertising light box brushless DC motor is composed of a motor body and a driver. It 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 nowadays use high-energy-mass rare earth neodymium-iron-boron (Nd-Fe-B) materials. 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. Brushless DC motor because of the characteristics of brushed DC motor, but also the frequency change device, so it is also known as DC inverter, internationally known as BLDC. Brushless DC motor operating efficiency, low speed torque, speed accuracy than any other The frequency converter of control technology is better, so it is worth paying attention to the industry. This product has produced more than 55kW, can be designed to 400kW, and can solve the industry's energy-saving and high-performance drive needs. 1. Fully replace the DC motor speed control, fully replace the inverter + variable frequency motor speed control, and fully replace the asynchronous motor + speed reducer speed control; 2. Can run at low speed and high power, can save the direct drive of the reducer to a large load; 3, Has all the advantages of the traditional DC motor, but also canceled the carbon brush, slip ring structure; 4, excellent torque characteristics, medium and low speed torque performance, starting torque, starting current is small; 5, stepless speed regulation, Wide range of speed regulation, strong overload capacity; 6, Small size, light weight, large output; 7, soft start soft stop, good braking characteristics, can save the original mechanical brake or electromagnetic brake device; 8, efficiency High, the motor itself has no excitation loss and carbon brush loss, eliminating the multi-level deceleration consumption, the comprehensive energy-saving rate of up to 20% to 60%, only saving one year to recover the purchase cost; 9, high reliability and stability Good performance, strong adaptability, simple repair and maintenance; 10, resistance to bumpy vibration, low noise, low vibration, smooth operation, long life; 11, no radio interference, no spark, especially suitable for explosive places, explosion-proof type; 12 , as needed To choose trapezoidal wave magnetic field motor and sintomagnetic wave magnetic field motor, our company's brushless DC motor in the industry with cost-effective, good after-sales service, and many companies reached a long-term cooperation and won a good reputation!