As the power source of electrical appliances or various machinery, the key function of the motor is to cause the torque of the drive.

Although the planetary reducer is mainly used in conjunction with servo motors and stepper motors, the professional knowledge of motors is still very popular. Therefore, I was impatient to see this “summary of the most powerful motor operation in history”. Come back to share with everyone.

Brushless Direct Current Motor (BLDCM) gets rid of the inherent shortcomings of brushed DC motors and replaces mechanical motor rotors with electronic device motor rotors. Therefore, brushless direct current motors have excellent variable speed characteristics and other characteristics of DC motors. It also has the advantages of simple structure of communication AC motor, no commutation flame, reliable operation and easy maintenance.
Basic principles and optimization algorithms.

The BLDC motor control regulations control the position and system of the motor rotor that the motor develops into the rectifier. For closed-loop control rate manipulation, there are two additional regulations, that is, accurate measurement of the motor rotor speed/or motor current and its PWM signal to control the output power of the motor rate.

The BLDC motor can select the side sequence or the management center to sequence the PWM signal according to the application regulations. Most applications only change the actual operation at a specified rate, and 6 separate edge-sequencing PWM signals will be selected. This shows the maximum screen resolution. If you use the specified network server for precise positioning, energy-consuming braking system or driving force reversal, it is strongly recommended to use the filled management center to sequence the PWM signal.

In order to better the rotor part of the magnetic induction motor, the BLDC motor uses a Hall-effect sensor to show the absolute positioning magnetic induction. This results in more applications and higher costs. Inductorless BLDC operation eliminates the need for Hall elements, and only selects the self-induced electromotive force (induced electromotive force) of the motor to predict and analyze the rotor part of the motor. Sensorless operation is particularly important for low-cost speed regulation applications such as cooling fans and pumps. When using BLDC motors, refrigerators and compressors must also be operated without inductors. Insertion and filling of full load time
Most BLDC motors do not need complementary PWM, full load time insertion or full load time compensation. It is very likely that BLDC applications with this characteristic are only high-performance BLDC servo motors, sine-wave encouraged BLDC motors, brushed motors AC, or PC synchronous motors.

Many different control systems are used to show the manipulation of BLDC motors. Typically, the output power transistor is used as a linear regulated power supply to manipulate the working voltage of the motor. This type of method is not easy to use when driving a high-power motor. High-power motors must be operated by PWM, and a microprocessor must be specified to show the start and control functions.

The control system must show the following three functions:

PWM operating voltage used to control the speed of the motor;

The system used to commutate the motor into the rectifier;

Use self-induced electromotive force or Hall element to predict and analyze the way of motor rotor.

The pulse width adjustment is only used to apply the variable working voltage to the motor winding. The reasonable working voltage is positively correlated with the PWM duty cycle. When proper rectifier commutation is obtained, the torque rate characteristics of BLDC are the same as the following DC motors. The variable operating voltage can be used to manipulate the speed and variable torque of the motor.