Automatic Control System In order to achieve various complex control tasks, the controlled object and the control device must be connected in a certain way to form an organic whole, which is the automatic control system. In an automatic control system, the output of the controlled object, that is, the controlled quantity, is a physical quantity that requires strict control. It can be required to be maintained at a certain constant value, such as temperature, pressure or flight trajectory, etc.; while the control device is for the controlled The totality of the related institutions that control the controlled object. It can use different principles and methods to control the controlled object, but the most basic one is the feedback control system based on the principle of feedback control. SCR speed regulation is to change the waveform of the motor terminal voltage by changing the conduction angle of the thyristor, thereby changing the effective value of the motor terminal voltage to achieve the purpose of speed regulation. When the thyristor conduction angle α1=180°, the motor terminal voltage waveform is a sine wave, that is, the full conduction state; (the two states shown in the figure) When the thyristor conduction angle α1 <180°, the motor terminal voltage The waveform is shown as the solid line in the figure, that is, the effective value is reduced in the non-full conduction state; the smaller the α1, the less the conduction state, the smaller the effective value of the voltage, the smaller the generated magnetic field, and the lower the motor speed . But at this time, the voltage and current waveforms of the motor are discontinuous, and the waveforms are poor, so the noise of the motor is large, and there is even obvious jitter and interference. These phenomena generally appear in breeze or low wind speed, which is normal. From the above analysis, we can see that the speed of the motor can be adjusted continuously by using SCR speed control. Power Inverter,Pure Sine Wave Inverter,300W Power Inverter,Mini Power Inverter GuangZhou HanFong New Energy Technology Co. , Ltd. , https://www.gzinverter.com
36 kinds of automatic control schematic diagrams: 
