1、 1 DC governor system outlined DC governor is artificially or automatically change the direct current generator rotational speed to meet the For mechanical requirements. From the mechanical properties point of view, is that by changing the parameters or electric motors plus The voltage electric moto
2、rs and other methods to change the mechanical properties, thus changing electric motors and mechanical properties Mechanical properties of the claimed identity work for the stability of operation of electric motors changed. There will be a link to the governor, usually through the middle enlarged li
3、nk, calibration links, feedback links and other links to achieve protection. The rotational speed electric motors not given rotational speed automatic calibration and error system as a part of the governor control system. This governor system of rotational speed electric motors and power supply volt
4、age fluctuations to be load fluctuations, the impact of external disturbances. Electric motors to the rotational speed automatic calibration and given rotational speed deviations from load voltage and power fluctuations, the impact of external disturbances to the rotational speed electric motors alw
5、ays consistent with the rotational speed of the governor to be known as loop system control system. This is due to a feedback loop control system link. Electrical transmission control systems usually by electric motors and control devices and information devices three parts. It can comply with the r
6、equirements of orders, the timely control of electric motors starting, braking, direction of the operation, location, speed and acceleration, work machinery and production processes to meet the requirements. With electrical, sensors, control devices, the flow of technology and change control theory,
7、 electrical transmission control systems have been greatly developed. Currently, the single aircraft used electrical capacity from a 2 few hundred kilowatts to tens of thousands of kilowatts, and change the flow of equipment from the rotary kiln electrical flow change Jingzhaguan stationary power un
8、its to change flow devices, and power off devices from static frequency conversion devices； Control module from the simulation of sensors, conditioners, will be integral to the development of devices to microprocessors chips at the core pay, DC generic digital volume control module； system control m
9、ode switching from manual operation of multi-parameter control to servo control； from simple mechanics to electrical transmission system expansion for location, speed, acceleration control of the important branches of the movement control. In short, modern electrical transmission control system has
10、been developed into a new electrical transmission automation system. DC governor advantage Direct current generator is a good, braking performance, appropriate in a broader context, smooth mechanics, rolling mill, mine hoist, excavator, marine rigs, metal cutting machine tools, paper planes, such as
11、 the need for high-performance high-lift electricity fees Controllable areas received widespread application. In recent years, exchanges governor system developed rapidly, but direct current fees system in theory and practice are relatively mature, and from the feedback loop control perspective, it
12、is the exchange control system based fees, so direct current governor system in the production and living and play a vital role. DC governor system, in particular the double-loop DC governor system is the most widely used industrial production process electrical transmission devices one. Widely used
13、 in steel rolling machines, metallurgy, printing, metal cutting machine tools, and many other areas of automatic control system. It is usually used three-phase full control of the bridge commutation circuits for power electric motors to control the 3 rotational speed of electric motors, the traditio
14、nal control systems using analog components, such as transistors, various linear circuit operation, although to some extent to meet production requirements, but because of aging components and easy to use, are vulnerable in the outside interference effects, and complex circuits, overall poor control
15、 results by device performance, temperature and other factors, thereby causing the operation of the system characteristics also change accordingly, the operating system reliability and accuracy can not be guaranteed, even in accidents. Double-loop system integral DC governor Rotational speed, the cu
16、rrent two-loop systems theory governor figure 2-1. By the plan shows that the system has two feedback circuit, a 2 loop circuit (so called double-loop). One is the current regulator Lt and current testing - the current part of a feedback link, and another by the speed regulator St rotational speed d
17、etection-a feedback link speed link. As part of the Central buildings currents, the currents that threatened to Central (boys Deputy Central), said speed link to cry (that the main part). In the circuit, a string St and Lt level connectivity from St to drive Lt, and then from Lt to the control trigg
18、er circuit. Chart speed regulator and current regulator are proportional plus integral (PI) regulator, the import and export of a limited Deputy currents are located. Rotational speed link called current rapid change in response to rotational speed, and currents are required to maintain current Cent
19、ral unchanged. This performance will be detrimental to current changes in response to rotational speed, the better to calm character soften Momentum. But as part of a dedicated rotational speed, current role only a part of a rotational speed of internal disturbances. Central, not the leading role. As a part of the rotational speed link enlarged multiple large enough, the last still relying on the scoring St. Eliminate rotational speed deviations.
