| Nowadays, it is a global tendency for electronic products to be a digital one. Digital control, in which software replaces analog and digital instruments, can increase the integration of the product; promote the flexibility and intelligence of the system. Using digital apparatus to put out low voltage as a control of high voltage, can save hardware resource, enhance security and stability. Therefore, the digital control tends to be one of the promising methods in the control of Electric Power System.This thesis puts forward a kind of design method used in the control of Power Feedback based on the TMS320LF2407 chip, which is produced by Texas Instruments Company. The key problem of Power Feedback apparatus is how to make the best use of electrical power. The theoretic foundation of it is High Frequency Electrical Power Transformation. It can utilize electrical power in a circle. It cannot only carry out the function of special load, but also feedback the electrical power to the input port. The efficiency of circle using can get exceed by eighty percent. In accordance, it break a new field in high efficiency saving and has a wide future.The invention of high speed DSP chip makes the using of digital control become possible in the wider control fields. It is the main difference between DSP and general microprocessor that the high processing speed and powerful code. The DSPs have abundant peripheral module to advance the integration of system, which make it is suitable in control field. Having the support of high speed DSP chip, digital control method not only can solve the problem about analog control, but also have plenty of control ability which is difficult to realize in analog control. The main merits are showed as followed. Firstly, digital control can utilize advanced and intelligent control method, which can improve the intelligent grade of Power Feedback Apparatus. Secondly, It makes control and upgrade become more flexible and more convenient. User can change program on line. Thirdly, the increase of reliability in system make the system is easier to be standardization. For the increase of reliability in digital control conduce to the increase of reliability in system. Fourthly, the servicing of system is very convenient. If something is wrong in the system, user can debug the system by RS232 or USB port. Lastly, because there is no difference in software control, the system has the coherence. The low cost and convenience in making make it has not the trouble in analog debugging. Using the strong control ability of TMS320LF2407 chip, user can realize the control of peripheral equipment by programming, utilize the produce of SPWM and Phase Lock., track and feedback to Electrical Net. This new method, which not only increases the speed of feedback but also reduces the power waste and simplifies the hardware circuit, makes the best of the resource of the TMS320LF2407 chip.Firstly, Introducing the research meaning, research content and developing tendency of Power Feedback Apparatus, make readers have a basal understand of Power Feedback Apparatus. Secondly, some function and application method of some modules of TMS320LF2407A chip, which adapt to the design of this system, for example, PWM module, CAP module and the comparison module of timer, are given. Thirdly, briefly introduce the principle of the control of Power Feedback and analyze the process about TMS320LF2407A chip which how to be used in control section and the requirement of control signal. Fourthly, the design of the software and the hardware in control section is introduced. The general setting program of these modules is introduced. The design of the software is introduced in the detail. The flow chat of program and some of the source code are given in this section. At last, some problems, which appeared in the course of debugging, are given. Simultaneously, some analysis, settlement method and the result are also particularized in this part.A great deal of analysis, simulations and experiments has verified the system's fea...
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