Design And Implementation Of The Power Control System For Imitated Storage Battery

In order to be consistent with the condion of the vehicle running, the starter performance test of cars, motorcycles, tanks, etc., is generally handled under the power supply of batteries. But in the actual testing process, the battery power is not suitable for experiment as its variability makes it difficult to repeat the measurement results, and its limited capacity not only makes the charge, maintenance, and replacement much inconvenience in the testing work, but also increases the business costs. The paper takes the background from the power supply in the performance experiments of the motor’s run and stop in China North Industries Group201. The article proposed a technical scheme in using electrical equipment instead of battery for the starter performance test. The technical solution not only solves the above issues, but also will reduce the cost on resource for the wasted battery and reduce the pollution of the environment at the same time.Firstly, the paper introduces the basic principles and main circuit structure of the system. And it analyzes the voltage regulation scheme of the imitated storage battery. Voltage regulation is the core of imitated power control system. Because of the nonlinear, time-varying characteristics of the device in the control loop, the noise of the industrial field and variable types of the tested starter products, simply using the traditional PID controller is difficult to meet the control requirements. While the fuzzy control is not strict with the model, and its robust performance and dynamic characteristics are better. Therefore, the system combines the advantages of them, using fuzzy PID algorithm as the system control strategy. On the basis of analysis of the mathematical model, the paper discusses the principle of the control theory, the parameters which affect the control performance and the implementation of algorithms of Fuzzy-PID control. And then through the MATLAB simulation, we verified the feasibility of the algorithms. Finally, the fuzzy PID control algorithm had been realized in the microcontroller through the look-up table method. In this way, we improved the controller performance, and realized the requirements of imitating battery through rectification power.The paper designed and developed the power control system with high-performance microcontroller STC12C5A16S2as the core controller. The control system includes the central control module, proximal interaction module, remote interaction platform, network communication subsystem, etc. In order to improve the scalability, reliability, debug convenience of the system, the hardware and software design adopt modularization. In this way, it raises the degree of intelligence in the power control system.Rectifier power supply can work in two modes including constant voltage mode and the battery mode. In the constant voltage mode, the power can track the given voltage from the computer in real-time and the output voltage can remain stable at the given value. In the battery mode, the power output voltage can follow the changes of the output current in accordance with the battery characteristics to replace the battery as the starter performance test.