Cpld-Based Design For Power Controller Board

The history of the electric power controller has been developed from analog devices to digital devices. The parameters of analog devices are liable to be disturbed by external surroundings with low precision. Compared with the analog devices, digital devices are more liable, and easy to be adjusted, and have strong ability to resist the environment influence. Most of the controllers on the market are made by SCM, but SCM can not process enough data for demanding. Now there are more and more data bit to process in limited time and the results must be accurate, which SCM can not meet the need, so the designers start to design the CPLD into controller, which has more ability in calculation.The power controller board of this paper is based on the EPM2210 CPLD of Altera MAX II series. The power controller can sample the current and the voltage in high sample rate, and output the PWM signal according to the parameters which is set by users. It can also control the VFD by rotating encoder to display the values of current, voltage and the power, or reset the working mode and the parameters. It communicates with other equipments through I/O ports and the DA output. There are some interfaces and ports dedicated for testing and communicating, including JTAG, UART and the master-slave synchronization port. The PCB of this platform is designed in 6 layers, saving the cost and working stable in 50MHz, which can achieve the performance request.This paper is mainly about the several parts listed below:First, according to the applications' needs and expansibility of the power controller board, divide the functions into several parts to build the functional architecture, the main functional chips are chose and the peripheral circuit is designed, the schematic and PCB board are finished, the hardware platform is implemented.Second, the simulation of each hardware module is accomplished, mainly about compiling the Verilog HDL language for the interfaces of different chips and processing the data from ADCs under the software Quartus II.Finally, the hardware platform is tested, also the reliability and the safety is analyzed.