Six problems to pay attention to China Brush DC motor speed regulation

Six problems to pay attention to China Brush DC motor speed regulation

Six problems that need to be paid attention to in DC motor speed regulation:

1. The phase-shifting trigger circuit is used to control the conduction angle of the thyristor, and the firing angle can be adjusted by using a voltage signal;

2. The control voltage can be manually adjusted or automatically adjusted by the difference between the given and the speed feedback, and the regulator can perform PID calculation;

3. DC motor, fixed excitation, the motor speed is proportional to the armature voltage, so the voltage regulation should be adopted;

4, three-phase thyristor full-bridge rectifier circuit, can obtain pulsating DC power supply (adjustable);

5, a simple feedback-free speed control system, is to change the phase shift control voltage by a given potentiometer, thereby changing the conduction angle of the thyristor, changing the rectified output voltage, and changing the motor speed;

6. Simple and non-feedback system, there is a deviation between the actual motor speed and the given value, and the system can not automatically reduce this deviation, which can be directly applied for occasions where the requirements are not high.